Environmental Impact Report for the Etching Waste Liquid Recycling and Regeneration System Project of Hunan Lier Circuit Board Co., Ltd. Molecular Formula Physical and Chemical Properties Combustion and Explosiveness Toxicity and Toxicology: Decomposes into ammonia and hydrogen chloride at 337.8℃, recombines into fine particles of ammonium chloride upon cooling, producing white smoke. Liquid ammonia NH3 is a colorless gas with a pungent odor, molecular weight: 17.03, melting point: -77.7℃, boiling point: -33.5℃, ignition temperature: 651℃, easily soluble in water, ethanol, and ether. This product is flammable, toxic, and irritating. LD50: 350 mg/kg (oral in rats) LC50: 1390 mg/m3, flammable for 4 hours (inhalation in rats) (Storage method and capacity see 3.2.5.2) 3.2.6 Supporting Engineering: The supporting engineering for this project includes public utilities and some environmental protection facilities. 3.2.6.1 Feasibility Analysis of Public Utilities: According to the original design scale of Lier Circuit Board Company, the daily water supply in the plant is 1200m3, and the actual water usage is about 1100m3/d, leaving a surplus of 100m3/d. The daily water supply for this project is 2.1m3/d. Therefore, the water supply for this project is completely feasible based on the existing facilities of the enterprise. The electricity required for this project is 175000kwh/a, which is a very small portion of the enterprise's electricity consumption, making the power supply for the project feasible based on the existing facilities of the enterprise. 3.2.6.2 Feasibility Analysis of Environmental Protection Engineering: The design treatment capacity of the sewage treatment station in the plant is 1200m3/d, and the wastewater discharge when fully reaching the design production capacity is 1040m3/d, leaving a surplus of 160m3/d. The drainage volume for this project is 1.65m3/d, and the wastewater quality is similar to the non-complex acidic/basic copper-containing waste liquid generated during circuit board production. Therefore, it is completely feasible for the existing sewage treatment station of the enterprise to treat the production wastewater. The ammonia gas from the project will be treated using the ammonia purification tower that dissipates ammonia gas from the alkaline etching process. This purification tower uses an acid spray mist removal method to purify and filter the ammonia gas generated during the alkaline etching process of the inner and outer layers of the circuit board. According to the acceptance report of Lier Circuit Board, the removal rate of ammonia gas by this purification tower reaches 80%. For detailed feasibility analysis of environmental protection engineering, see Chapter 7 on pollution control measures for waste gas and wastewater. 3.2.6.3 Summary: This project is a pre-approval construction project, and it has been in operation for more than two years. From the actual operation situation and the current monitoring data of this environmental impact assessment, it can be seen that the support of public utilities and some environmental protection facilities for this project is feasible, and pollutant treatment can meet discharge standards. 3.2.7 Land Occupation and Overall Layout: This project utilizes the rooftop of the circuit board company's factory building, and no additional land acquisition is required (the competent authority, the park management committee, has granted permission, see Attachment 10). The total land area is 416 m2, of which the acidic waste liquid recycling system occupies 136m2, and the alkaline waste liquid recycling system occupies 280m2. The overall layout and environmental protection setup diagram for this project are as follows: Figure 3.2-1 Overall Layout Diagram of the Project 3.2.8 Number of Employees and Work System: The labor staffing and work system for this project are detailed in the table below. Table 3.2-8 Labor Staffing and Work System System Name Labor Staffing Work System: Acidic Etching Waste Liquid Recycling System: 8 people (2 management personnel, 6 production personnel) Annual working days: 360 days, three shifts, 8 hours per shift. Alkaline Etching Waste Liquid Recycling System: 8 people (2 management personnel, 6 production personnel) Annual working days: 340 days, continuous 24 hours a day, divided into day and night shifts. 3.2.9 Investment Amount and Fundraising: The total investment for this project is 3.4 million yuan, of which the investment for the acidic etching waste liquid recycling system is 1.4 million yuan, and the investment for the alkaline etching waste liquid recycling system is 2 million yuan, all funded by the enterprise itself. The environmental protection investment for this project is 150,000 yuan, accounting for 4.4% of the total investment. 24 Environmental Impact Report for the Etching Waste Liquid Recycling and Regeneration System Project of Hunan Lier Circuit Board Co., Ltd. 3.2.10 Project Progress: The alkaline etching waste liquid recycling system project was completed and put into operation in October 2011, and the acidic etching waste liquid recycling system project was completed and put into operation in August 2013. 3.3 Analysis of the Etching Waste Liquid Recycling and Regeneration System Project 3.3.1 Process Flow and Pollution Generation Points 3.3.1.1 Acidic system process flow and pollution generation points 1. Analysis of the source, composition, and design disposal scale rationality of acidic etching wastewater The acidic etching wastewater is generated during the production process of inner layer circuit patterns of multilayer printed circuit boards at Lier Circuit Board Company. The main chemical reaction in the acidic copper chloride etching process is that Cu2+ in copper chloride has oxidizing properties, which can oxidize the copper on the copper plate to Cu1+, with the reaction as follows: Etching reaction: Cu + CuCl2 → Cu2Cl2 The formed Cu2Cl2 is not easily soluble in water, and in the presence of excess Cl-, it can form soluble complex ions, with the reaction as follows: Complex reaction: Cu2Cl2 + 4Cl- → 2[CuCl3]2- As copper is etched, the amount of Cu2+ in the solution decreases, and the etching ability will quickly decline until it eventually loses effectiveness. To maintain etching ability, Cu1+ can be regenerated back to Cu2+ through solution regeneration. Lier Circuit Board Company has one set of acidic etching wastewater recovery treatment equipment, with a designed treatment capacity of about 480 t/a. Based on past hazardous waste transfer slips for etching wastewater and actual production capacity, the actual generation of acidic etching wastewater by the company is estimated to be about 420 t/a. It can be seen that the designed treatment scale of the project matches the company's wastewater generation, and the designed treatment scale is reasonable. 25 Environmental impact report of the etching wastewater recycling and regeneration system project of Hunan Lier Circuit Board Co., Ltd. 2. Process flow diagram of acidic etching wastewater regeneration and recycling G - Waste gas N - Noise W - Wastewater Figure 3.3-1 Process flow and pollution generation points of acidic etching wastewater regeneration and recycling 3. Process description The acidic etching solution consists of hydrochloric acid + oxidant. Lier Circuit Board Company uses oxygen generated during the electrolysis process as the oxidant (replacing the previously used sodium chlorate or hydrogen peroxide) to convert Cu+ to Cu2+, and Cu2+ reacts with elemental Cu to form the etching mechanism. The reaction formula for acidic etching of copper is: Cu + CuCl2 = 2CuCl The main control parameters during the acidic etching process of the project are ORP (oxidation-reduction potential) and copper content (using specific gravity as a control parameter). The ORP is controlled between 480~650mv during the etching process. When the online detection shows that the ORP is below the control parameter, the etching solution enters the anion electrolysis system. Through electrochemical action, the monovalent copper ions in the acidic etching solution lose electrons at the anode and are oxidized to divalent copper ions, increasing the divalent copper ions and reducing or eliminating the monovalent copper ions, thereby enhancing the oxidation capacity of the etching solution, which then returns to the etching tank for recycling; when the specific gravity in the etching tank exceeds the control parameter (1.14~1.17), the etching solution enters the cation electrodeposition process, where the copper ions are reduced to elemental copper at the cathode under electrolysis, thus reducing the concentration of copper ions. The etching solution with reduced copper ion content is then adjusted and returned to the etching process for use, forming a solution recycling loop. This ensures the recycling of the project’s acidic etching solution. The entire acidic etching solution regeneration and recycling system mainly consists of four components: anion membrane electrolysis recycling system, cation membrane electrodeposition copper recovery recycling system, oxidizing gas and acid mist absorption system, and regeneration liquid adjustment monitoring system. ① Anion membrane electrolysis recycling system The acidic etching solution enters the anion membrane electrolysis system for continuous treatment, with a daily processing capacity of 1000L. The ORP before and after electrolysis is raised from 480~550mv to 550~650mv. The low ORP acidic etching solution from the etching machine enters the anion membrane electrolysis tank at the low position of the anode. Under electrolysis, the monovalent copper ions in the acidic etching solution lose electrons at the anode and are oxidized to divalent copper ions, increasing the divalent copper ions and reducing or eliminating the monovalent copper ions, thereby enhancing the oxidation capacity of the etching solution, raising the ORP. The high ORP acidic etching solution then flows out from the high position of the anode area back to the etching process, ensuring the normal production needs of the etching process, forming a recycling of etching solution with enhanced oxidation capacity. Electrolysis reaction mechanism: Anode: 2Cu+ - 2e = 2Cu2+ During electrochemical regeneration, as long as Cu+ is present, the reaction of Cu+ oxidizing to Cu2+ will preferentially occur. When the concentration of Cu+ is below 10g/L or the anode current density increases, it will lead to the oxidation of Cl- and the release of chlorine gas. This project controls the anode current density and ensures that the Cu+ concentration in the regeneration liquid is greater than 10g/L, effectively preventing the generation of chlorine gas. Cathode: 2H+ + 2e = H2 Figure 3.3-2 Schematic diagram of anion membrane electrolysis 27 Environmental impact report of the etching wastewater recycling and regeneration system project of Hunan Lier Circuit Board Co., Ltd. Figure 3.3-3 Process flow of anion membrane electrolysis ② Cation membrane electrodeposition copper recovery recycling system The acidic etching solution enters the cation membrane electrodeposition system for batch processing, with each batch having an input volume of about 462L and a processing time of about 10.64h. The daily working time is 24h, with a daily wastewater processing capacity of 1042L. The high copper content etching solution enters the low position of the cation membrane tank from the cathode area. Under electrolysis, the copper ions in the etching wastewater are reduced to elemental copper at the cathode, thereby reducing the concentration of copper ions. The etching solution, after the copper ion content is reduced, flows out from the high position of the cathode, is adjusted, and returned to the etching process for use, forming a solution recycling loop. Electrodeposition reaction mechanism: Anode: 2OH- - 2e = 2H+ + O2 Cathode: Cu2+ + 2e = Cu Cathode chamber Anode chamber Figure 3.3-4 Schematic diagram of cation membrane electro-deposition 28 Environmental impact report of the etching wastewater recycling and regeneration system project of Hunan Lier Circuit Board Co., Ltd. Figure 3.3-5 Process flow of cation membrane electro-deposition The control of electro-deposition mainly relies on the control of the specific gravity of the etching solution, and the Cu concentration after electro-deposition is approximately 40 g/L. ③ Oxidizing gas and acid mist absorption system During the electrolysis-electro-deposition process with anion and cation membranes, as the electrode reactions proceed, the solution temperature rises. The anion membrane at the cathode generates hydrogen gas, while the cation electro-deposition anode generates oxygen gas, and some hydrochloric acid mist also volatilizes. The project waste gas is absorbed into the regeneration liquid through a jet, which can increase the ORP of the regeneration liquid while reducing the consumption of hydrochloric acid. After absorption, it enters the alkaline waste gas absorption tower for purification treatment before being discharged. ④ Regeneration liquid preparation monitoring system In the regeneration liquid preparation process, 35% hydrochloric acid is added to ensure that the Cl- concentration in the regeneration liquid is maintained at 190g/L. The entire system is equipped with multiple monitoring devices such as specific gravity detectors, ORP monitors, pH meters, and flow meters to control the operating data of the entire system in real-time, which not only reduces the labor intensity of employees but also ensures the normal operation of the system. 4. Process characteristics ① This process does not lose the original constituent elements of the etching solution, allowing for complete reuse of the etching solution and eliminating the need for oxidant addition, thus reducing production costs while achieving the recycling of etching solution and zero discharge of clean production. 29 Environmental impact report of the etching wastewater recycling and regeneration system project of Hunan Lier Circuit Board Co., Ltd. ② Chlorine gas is not produced in the cation membrane reaction tank, but oxygen is discharged. The entire recycling system almost does not emit chlorine gas. 3.3.1.2 Alkaline system process flow and pollution generation points 1. Source, composition, and design disposal scale rationality analysis of alkaline etching wastewater In the integrated stage of the DES process (developing, etching, and stripping) for the inner layer of the circuit board, the etching is mainly done by using alkaline etching solution to remove the copper that needs to be etched from the copper-clad board, thus obtaining the desired circuit pattern, while ammonia gas is emitted and etching wastewater is generated. The alkaline etching solution contains 25% ammonia water and 25% ammonium chloride. During the etching process, some ammonia gas will volatilize from the alkaline etching solution that is sprayed at high speed onto the copper-clad board. Under the action of oxygen, Cu forms Cu+2, which then combines with NH3 to form copper-ammonia complex ion Cu(NH3)4+2, thus achieving the etching effect. The main components in the alkaline etching wastewater are: Cu2+ 130g/L, Cl- 180g/L. Lier Circuit Board Company has one set of alkaline etching wastewater recovery and treatment equipment. The designed treatment capacity is approximately 1200 t/a. The company estimates the actual production of acidic etching wastewater to be about 1100t/a based on past hazardous waste transfer slips and actual production capacity; thus, it can be seen that the designed treatment scale of the project matches the company's wastewater generation amount, and the designed treatment scale is reasonable. 2. Process flow diagram of alkaline etching wastewater regeneration recycling G - Waste gas N - Noise Figure 3.3-6 Process flow and pollution generation points of the alkaline etching wastewater regeneration recycling system 30 Environmental impact report of the etching wastewater recycling and regeneration system project of Hunan Lier Circuit Board Co., Ltd. 3. Process description Alkaline etching wastewater is pumped to the alkaline etching wastewater treatment workshop located on the rooftop of the circuit board workshop, where it enters the electrolytic cell for electrolysis, using batch processing with each batch having a volume of about 4500L and a processing time of about 24 hours. The reaction equations for the regeneration electrolysis system are: Anode reaction: 4OH- = O2 + 2 H2O + 4e Cathode reaction: 2Cu2+ + 4e = 2Cu Under the action of electrolysis, the copper ions in the etching wastewater are reduced to elemental copper at the cathode, thereby reducing the concentration of copper ions, while oxygen is released at the anode. The control points for electrolysis are a voltage of 19V and a current of 1900A. After electrolysis, the Cu2+ concentration is 15g/L. At the end of an electrolysis cycle, the etching liquid with low copper ions in the electrolytic equipment is completely pumped into a storage tank, and the cathode plate is removed to knock off the elemental copper attached to it, while another batch of alkaline etching wastewater enters the electrolytic cell to start the next electrolysis cycle. The low copper ion regeneration liquid in the storage tank enters the regeneration liquid preparation process, where certain amounts of liquid ammonia, ammonium chloride, and additives are added based on the current values of the components in the regeneration liquid. For every ton of regeneration liquid, 2kg of liquid ammonia, 2L of additives, and about 1kg of ammonium chloride are added to prepare a regeneration sub-liquid with a Cu2+ concentration of 15g/L and Cl- 180g/L. The undissolved ammonium chloride in the regeneration sub-liquid is filtered, and a small amount of ammonium chloride filter residue is recycled into the regeneration liquid preparation process for stirring and dissolving; the filtered liquid is pumped back into the etching process for recycling. Thus, a complete alkaline etching wastewater regeneration recycling treatment process is accomplished. 4. Pollution generation points During the regeneration recycling treatment process, as the electrode reactions proceed, the solution temperature rises, and the precipitation of elemental copper at the cathode occurs, while oxygen is generated at the anode, and some ammonia gas volatilizes from the copper-ammonia complex ion Cu(NH3)4+2 in the solution; a very small amount of ammonia gas will also volatilize when adding liquid ammonia during the adjustment of the regeneration liquid components. Each tank in the alkaline etching wastewater regeneration recycling system is closed, and the ammonia gas generated from each tank is drawn into the Lier alkaline tail gas treatment tower through openings at the tank edges, where it is treated through a water curtain purification and filtration tower (the ammonia absorption tower in the alkaline etching line of the inner/external layer production process) before being discharged in compliance with standards. 3.3.2 Material balance and water balance analysis 3.3.2.1 Analysis of Material Balance in Acid Etching Waste Liquid Regeneration System 1. Main Material Balance 31 Hunan Lier Circuit Board Co., Ltd. Etching Waste Liquid Recycling Regeneration System Project Environmental Impact Report Figure 3.3-7 Material Balance Diagram of Acid Etching Liquid Anion Membrane Electrolytic Recovery System Figure 3.3-8 Material Balance Diagram of Acid Etching Liquid Cation Membrane Electrolytic Recovery System 32 Hunan Lier Circuit Board Co., Ltd. Etching Waste Liquid Recycling Regeneration System Project Environmental Impact Report (1) The balance of copper ions is shown in Figure 3.3-9, with an annual production of 37.5 tons of elemental copper. Based on the mass ratio of copper produced in the cathode chamber to oxygen produced in the anode chamber being approximately 4:1, the annual oxygen production is 9.375 tons, which is 292969 mol. The collected oxygen is used for the dissolution absorption of the anion membrane, acting as an oxidizing agent in the anion membrane electrolytic recovery system. (2) According to the data in Figure 3.3-7, the daily waste liquid circulation amount is 1042L, with an annual treatment amount of 375000m³, where 20g/L of monovalent copper ions are oxidized to divalent copper ions; the number of transferred electrons is 375000*20/64=117188 mol, theoretically requiring 58594 mol of oxygen as an oxidizing agent, while the provided oxygen amount is 5 times the required amount as analyzed in (1). (3) The cathode chamber in the anion membrane electrolytic recovery system serves as an auxiliary role, used only when the generated oxygen is insufficient or when there are issues with jet absorption, to increase the ORP of the etching liquid. 2. Copper Balance The source of copper ions in the acid etching waste liquid regeneration recycling system comes from the etching waste liquid, with an annual circulation amount of 480t (approximately 375m³), where the copper ion concentration is about 140g/L, resulting in a copper content of approximately 52.5t/a. Copper ion output: After electrolysis, the copper ion concentration in the catholyte is about 40g/L. The cathode titanium plate, which has elemental copper adhering to it, is cleaned in the copper washing tank, and the cathode plate carries away a very small amount of copper-containing catholyte. According to statistical data since the project began operation, the copper brought into the copper washing water during washing accounts for about 0.625% of the copper amount in the catholyte; the catholyte with a small amount of copper carried away is adjusted in composition to form regenerated acidic etching liquid, with a copper ion concentration of about 39.75g/L. Therefore, when the regeneration recycling system is operating at full capacity, the copper ion output is: electrolysis produces 37.5t/a of elemental copper, regenerated liquid contains 14.90625t/a of copper (concentration of 39.75g/L), and the copper brought into the copper washing water during washing is 0.09375t/a (this portion of water is treated in the company's wastewater treatment station, with copper in the sludge being 0.09371t/a, and 0.00004t/a of copper entering the industrial park's wastewater treatment plant with the tail water). See Table 3.3-1 and Figure 3.3-9 for details. Table 3.3-1 Copper Ion Balance Table for Acid Etching Waste Liquid Regeneration Recycling System Input (t/a) Output (t/a) Name Acid Etching Waste Liquid Elemental Copper Regenerated Etching Liquid Copper Washing Water Total Sludge Tail Water Quantity 52.5 37.5 14.90625 0.09371 0.00004 52.5 Percentage (%) 100 71.43 28.39 0.18 100 33 Hunan Lier Circuit Board Co., Ltd. Etching Waste Liquid Recycling Regeneration System Project Environmental Impact Report Figure 3.3-9 Copper Balance Diagram of Acid Etching Waste Liquid Treatment System 3. Chlorine Balance The source of chlorine in the alkaline etching waste liquid regeneration recycling system mainly comes from the chloride ions in the waste liquid and the addition of hydrochloric acid; the output mainly enters the regenerated etching liquid, copper washing water, and the hydrochloric acid mist emitted into the atmosphere, as well as recovered hydrogen chloride. During the etching production process, the chlorine ion content is maintained at around 190g/L, and the consumption and replenishment of chlorine ions are shown in Figure 3.3-10, where the values have been converted to chlorine content. Figure 3.3-10 Chlorine Balance Diagram of Acid Etching Waste Liquid Treatment System 3.3.2.2 Analysis of Material Balance in Alkaline Etching Waste Liquid Regeneration System 1. Copper Balance 34 Hunan Lier Circuit Board Co., Ltd. Etching Waste Liquid Recycling Regeneration System Project Environmental Impact Report The source of copper ions in the alkaline etching waste liquid regeneration recycling system comes from the etching waste liquid, with an annual circulation amount of 1200t (approximately 923m³), where the copper ion concentration is about 130g/L, resulting in a copper content of approximately 120t/a. Copper ion output: According to the alkaline waste liquid treatment process, elemental copper is deposited from the cathode after electrolysis, without the need for cleaning, and there is no copper washing process. According to statistical data since the project began operation, when the regeneration recycling system is operating at full capacity, the copper ion output is: electrolysis produces 106t/a of elemental copper; the regenerated liquid contains 14t/a of copper (concentration of 15g/L). See Figure 3.3-11 for details. Figure 3.3-11 Copper Balance Diagram of Alkaline Etching Waste Liquid Regeneration Recycling System 2. Ammonia Balance During the electrolysis process of the alkaline etching waste liquid regeneration recycling system, the original copper-ammonia complex ions deposit copper, and with the increase in electrolysis temperature, ammonia gas volatilizes. The replenishment of ammonia mainly comes from the addition of liquid ammonia and ammonium chloride in the composition adjustment of the regenerated liquid. The ammonia balance in this system is shown in the figure below. Figure 3.3-12 Ammonia Balance Diagram of Alkaline Etching Waste Liquid Regeneration Recycling System 35 Hunan Lier Circuit Board Co., Ltd. Etching Waste Liquid Recycling Regeneration System Project Environmental Impact Report 3.3.2.3 Water Balance Analysis Figure 3.3-13 Water Balance Diagram of This Project 3.3.3 Pollution Source Analysis Based on statistical data since the project began operation and material balance calculations, the analysis and calculation of pollutants generated from the acid and alkaline etching waste liquid produced during full-load production of circuit boards when this project is operating at full capacity are as follows. 3.3.3.1 Wastewater The total wastewater volume of this project is 602t/a, including wastewater from the acidic and alkaline wastewater treatment sections and employee domestic sewage. (1) Acidic wastewater from the production of wastewater treatment: mainly consists of wastewater from the electrolysis section of acidic etching wastewater treatment and periodic drainage from the scrubber. ① Wastewater from the electrolysis section of acidic etching wastewater (W1): The wastewater generated in the electrolysis section includes the electrolyte carried out with copper plates during copper extraction, wastewater generated during the cleaning of electrolysis equipment, and a very small amount of wastewater generated from cleaning the workshop. According to the statistical data since the project began operation, the calculated wastewater output during full-load production of the circuit board in this section is 182.2t/a. The main pollutants are COD, SS, Cu, and ammonia nitrogen; ② Wastewater from the scrubber of the acidic wastewater treatment system: This project has 2 sets of scrubbing equipment, one set is for iron chip absorption tank and ferrous chloride scrubber; the other set is a water spray tower. Wastewater from the ferrous chloride scrubber (W2): The iron chip absorption tank is used to treat hydrochloric acid that has not been completely absorbed by the absorption tank. The tail gas from the iron chip absorption tank enters the ferrous chloride scrubber, and the ferrous chloride in the scrubber is drawn from the iron absorption tank. After undergoing a redox reaction, it generates ferric chloride, which then overflows back into the iron chip absorption tank. Ferric chloride reacts with iron chips to regenerate ferrous chloride, continuing to absorb oxidative gases. At the same time, a specific gravity controller is installed in the iron chip absorption tank. When the specific gravity reaches 1.35, the ferric chloride wastewater will be discharged into the wastewater collection tank and then provided to the wastewater treatment station in the form of a flocculant for wastewater treatment. The wastewater generated in this process is approximately 6t/a, which not only does not increase the treatment pressure of the wastewater station but also saves costs for wastewater treatment in the factory area. Wastewater from the water spray tower (W3): The hydrochloric acid that is not absorbed in the ferrous chloride scrubber enters the water spray tower, which generates approximately 40t/a of wastewater. ③ The workshop for acidic wastewater treatment uses mopping for floor cleaning, eliminating the need for rinsing. Due to the small workshop area, sealed production devices, and a simple production process, the cleanliness of the floor is high, resulting in very little mopping wastewater, which has been combined into the above point ①—acidic electrolysis section wastewater (W1). (2) Wastewater from the production of alkaline etching wastewater The amount of wastewater generated from the regular cleaning of equipment in alkaline wastewater treatment is 200L/month, which is filtered to remove impurities and then adjusted into a regeneration liquid. No wastewater is discharged externally. The workshop for alkaline wastewater treatment uses sweeping for floor cleaning, resulting in no floor cleaning water generated in the workshop. The total amount of wastewater from the acidic and alkaline wastewater treatment sections is 228.2 t/a. (3) Domestic sewage (W4) After the technical transformation of this project is completed, the number of employees will increase by 8. Based on a daily domestic water usage of 160L per person, the domestic water usage for the project is 1.28t/d, totaling an annual water usage of 467.2t. Taking the domestic sewage discharge coefficient as 0.8, the domestic sewage discharge from the project is approximately 373.8t/a. The main pollutants in the domestic sewage from the project are COD, SS, ammonia nitrogen, total nitrogen, and total phosphorus. The generation and discharge of water pollutants from this project are shown in the table below. Project wastewater pollutant discharge situation Wastewater Pollutant Type Segment Name Pollutant Generation Amount Pollutant Discharge Amount Treatment Measures Concentration Generation Amount Concentration Discharge Amount (mg/L) (t/a) (mg/L) (t/a) Standard Concentration Limit (mg/L) Domestic Employee Sewage Domestic Wastewater Volume / 373.8 COD 400 0.15 SS 250 0.093 NH3-N 30 0.011 / 373.8 / Septic tank treatment 60 0.0224 60 After entering industrial park wastewater treatment 20 0.0075 20 Factory 8 0.003 15 37 The environmental impact report of the etching wastewater recycling system project of Hunan Lier Circuit Board Co., Ltd. Production wastewater Acidic and alkaline etching wastewater treatment section wastewater volume / 228.2 Cu2+ 410.8 0.09375 COD 438.2 0.1 SS 192.8 0.044 Ammonia nitrogen 29.4 0.0067 Fe3+ 3.94 0.0009 / 228.2 / Connected to the factory area sewage 0.175 0.00004 0.5 At the water treatment station 58.3 0.0133 60 After treatment, it enters the industrial park sewage treatment 19.3 0.0044 20 Treatment factory 7.9 0.0018 8 3.94 0.0009 / The online monitoring data from July 15 to 17, 2014, indicates that the copper ion content in the effluent from the sewage treatment station ranged from 0 to 0.2898mg/L, with an average concentration of 0.0886mg/L. The actual sewage treatment statistics for the sewage treatment station in July were 15858m³, with an average treatment volume of 511.55 m³/d; the production capacity of circuit boards in July was approximately 60% of the design capacity. When converted to full load, the treatment volume of the sewage treatment station was 852.6 m³/d. Compared to the design treatment volume of 1200 m³/d, it can be seen that during the production of circuit boards and the full-load operation of this project, the total wastewater treatment volume remains within the design range of the sewage treatment station, which can effectively treat the wastewater. The treatment efficiency remains unchanged, and the online monitoring data from July 15 to 17, 2014, can fully represent the discharge situation during the production of circuit boards and the full-load operation of this project. The concentration of copper ions in the effluent is approximately 0.0886mg/L, which is less than the standard value of 0.5mg/L, therefore the effluent from the factory's sewage treatment station can meet the standards for discharge into the park's sewage treatment plant. Exhaust gas (1) Organized exhaust gas Acid etching solution regeneration circulation line: According to the process flow analysis of this project, each tank of the acid etching solution recovery line is sealed. The acidic exhaust gas generated in each tank is collected through a vent hole at the tank edge, maintaining a negative pressure state to prevent gas leakage. After condensation and reflux (recovering most of the hydrochloric acid), the remaining gas is treated in the dissolution absorption tank, iron chip absorption tank, ferrous chloride absorption tower, and water spray tower, and finally discharged through a self-built 15m high exhaust stack. The exhaust gas collection rate reaches 99%, and the removal rate of hydrochloric acid can exceed 95%, with a discharge amount of 0.2077t/a. Alkaline etching solution regeneration circulation line: According to the process flow analysis of this project, each tank of the alkaline etching solution recovery line is sealed. The ammonia gas generated in each tank is connected to the Li'er alkaline tail gas treatment tower through a vent hole at the tank edge. After treatment in the water curtain purification filter tower (the ammonia absorption tower in the alkaline etching line), it is discharged into the 15m exhaust stack at high altitude. The exhaust gas collection rate reaches 99%. According to the acceptance data of the Li'er circuit board project, the purification treatment tower achieves an ammonia removal rate of over 80%, resulting in an ammonia discharge amount of 0.6336t/a. 38 Hunan Li'er Circuit Board Co., Ltd. Etching Waste Liquid Recycling Regeneration System Project Environmental Impact Report Table 3.3-3 Organized emission situation of this project Point source Point source name Exhaust stack height Exhaust stack diameter Number Emission rate (m³/h) Emission source strength Temperature (K) Hours (h) Working condition (t/a) 1# exhaust stack Hydrochloric acid 15 0.8 8000 293 8640 Normal 0.2077 2# exhaust stack Ammonia 15 0.8 20000 293 8160 Normal 0.6336 (2) Unorganized exhaust gas The raw and auxiliary materials used in the project are stored in sealed containers and kept in a chemical storage room. The raw materials used in production are taken in the amount needed for that day's production. The production sections that generate exhaust gas are equipped with closed ventilation devices, but during the transportation, use, and exhaust gas collection of chemical materials, a small amount of hydrochloric acid will still be released into the ambient air in an unorganized manner. For safety reasons, the evaluation considers the usage amount, properties, storage and operating conditions of chemicals, and compares with similar projects' actual production situations to estimate the unorganized emission amount of the project. The collection rate of exhaust gas in the etching solution recovery workshop of this project is 99%, with the remaining 1% unable to be collected and released in an unorganized manner. The unorganized exhaust gas emission situation of this project is shown in the table below: Table 3.3-4 Unorganized emission situation of this project Pollutant Generation process Amount generated by this project (tons or workshop/year) Area of surface source Area of surface source height (m2) (m) Hydrochloric acid Acid etching solution regeneration circulation workshop 0.04195 120 13 Ammonia Alkaline etching solution regeneration circulation workshop 0.032 240 13 (3) Abnormal working condition exhaust gas emission situation The abnormal working condition of the project is due to the failure of the washing tower equipment, resulting in exhaust gas being discharged directly without treatment. The emission situation of exhaust gas under abnormal working conditions is shown in the table below. Table 3.3-5 Overview of exhaust gas emissions under abnormal working conditions of this project Pollution source location Pollutant name Concentration Rate (mg/m3) (kg/h) Exhaust gas volume Emission height (m3/h) (m) Acid etching waste liquid treatment workshop Hydrochloric acid 60.09 0.4807 8000 15 Alkaline etching waste liquid treatment workshop Ammonia 19.41 0.3882 20000 15 3.3.3.3 Noise The project's noise mainly comes from various auxiliary equipment, such as acid and alkali pumps, fans, etc. The noise sources of the project are relatively concentrated, basically all located within the factory building. The noise pollution from this type of production equipment is not severe, so the project only implements general control measures for noise sources. The specific situation of the main noise sources is shown in the table below. Table 3.3-6 Project noise source situation table Equipment Source strength Quantity Equivalent sound source Name dB(A) (units) Source strength dB(A) Location Distance from each factory boundary Control measures Distance (meters) Acid and alkali pump 70 28 Acid and alkaline etching 84.5 Waste liquid treatment workshop E50, W50, S55, N55 Vibration reduction fan 80 2 Acid etching waste 83 Liquid treatment workshop Roof E50, W50, S55, N55 Vibration reduction, sound absorption 3.3.3.4 Solid waste The hydrochloric acid needed for this project comes from the hydrochloric acid storage tank of the circuit board production line. The hydrochloric acid for the entire plant is transported to the factory by tank trucks and pumped to the rooftop hydrochloric acid storage tank, with no discarded hydrochloric acid packaging barrels; liquid ammonia cylinders are promptly removed by suppliers after use, and no liquid ammonia storage tanks are kept in the factory. In the alkaline waste liquid recycling and regeneration liquid preparation process, a small amount of ammonium chloride that has not completely dissolved is filtered out, and the ammonium chloride filter residue is recycled into the regeneration liquid preparation process for stirring and dissolving. Therefore, this project has no filter residue emissions. The solid waste generated by the project includes: waste filter elements, waste cation and anion membranes, waste product packaging, and domestic waste. The specific generation and disposal situation is shown in the table below. Table 3.3-7 Overview of solid waste generation and disposal Waste category Name Hazardous waste number Generation amount Disposal amount Emission amount Treatment measures (t/a) (t/a) (t/a) Disposal method Domestic Domestic waste / 2.92 2.92 0 Collected and treated by the park sanitation department General Waste product packaging / Solid waste 0.6 0.6 0 Purchased by waste recyclers Waste cation and anion membrane HW13 Waste filter element 0.002 0.002 0 0.1 0.1 0 Recycled and treated by suppliers, relying on the factory's hazardous waste temporary storage facility 3.3.3.5 Pollutant emission "three accounts" The pollutant emission situation of this project under full load production is shown in the table below. Table 3.3-8 Pollutant emission situation of this project (t/a) Type Pollutant Name Generation Amount Reduction Amount Emission Amount Final Discharge to Environment Amount Compliance Status Waste Gas Hydrogen Chloride 4.195 Ammonia 3.2 3.90535 0.24965 0.24965 Compliant 2.5344 0.6656 0.6656 Compliant Production Wastewater COD 0.1 0.0867 0.0133 0.0133 Compliant 40 Hunan Lier Circuit Board Co., Ltd. Etching Waste Liquid Recycling System Project Environmental Impact Report SS 0.044 0.0396 0.0044 0.0044 Compliant Cu2+ 0.09375 0.09371 0.00004 0.00004 Compliant NH3-N 0.0067 0.0049 0.0018 0.0018 Compliant COD 0.15 0.1276 0.0224 0.0224 Compliant Domestic Sewage SS 0.093 0.0855 0.0075 0.0075 Compliant NH3-N 0.011 0.008 0.003 0.003 Compliant Product Packaging 0.6 0.6 0 0 Compliant Solid Waste Domestic Garbage 2.92 Waste Filter Cartridge 0.1 2.92 0 0 Compliant 0.1 0 0 Compliant Waste Ion Membrane 0.002 0.002 0 0 Compliant After the completion of this technical transformation project, the pollutant "three accounts" situation of the entire plant is shown in the table below. (The existing project emission amount is based on the circuit board production acceptance report data, converted into the pollutant emission amount under full load production) Table 3.3-9 Pollutant emission situation of the entire plant (t/a) Pollutant Pollutant Category Name Existing Project Technical Transformation Project Release Emission Amount "With New Carry" Old Reduction Amount Total Emission Change After Technical Transformation Project Completion Hydrochloric Acid Mist 0 0.2077 0 0.2077 +0.2077 (Organized Emission) Ammonia 1.03 0.6336 0 1.6636 + 0.6336 Waste Gas (Unorganized Hydrogen Chloride 0 0.04195 0 0.04195 +0.04195 Organized Emission) Ammonia 0.1387 0.032 0 0.1707 +0.032 Wastewater Volume 240000 228.2 / 240228.2 +228.2 Wastewater (Production Wastewater) CODcr SS Copper 13.68 0.0133 4.56 0.0044 0.12 0.00004 / 13.6933 +0.0133 / 4.5644 +0.0044 / 0.12004 +0.00004 Ammonia Nitrogen 1.824 0.0018 / 1.8258 +0.0018 Wastewater Volume 20000 373.8 / 20373.8 +373.8 Domestic Sewage CODcr 1.14 0.0224 / 1.1624 +0.0224 Water SS 0.38 0.0075 / 0.3875 +0.0075 Ammonia Nitrogen 0.15 0.003 / 0.153 +0.003 Solid Domestic Garbage 0 / 0 / 0 Waste Industrial Solid Waste 0 / 0 / 0 3.4 Existing Major Environmental Issues and Proposed Rectification Measures Since its production began in 2008, Lier Circuit Board Factory has maintained stable operations, with environmental protection facilities functioning normally and various pollutants being discharged in compliance with standards. In response to the national call for 'developing a circular economy, achieving energy conservation and emission reduction, and promoting clean production,' Hunan Lier Circuit Board Co., Ltd. completed one alkaline and one acidic etching wastewater recycling system in October 2011 and August 2013, respectively, realizing the recycling of wastewater from the acid and alkaline etching processes. However, this system has not undergone an environmental impact assessment to date. Based on the current operational situation of this project, the following environmental issues exist: 1. Except for the acid treatment workshop in the production and storage areas, which have been equipped with anti-seepage and containment measures, the alkaline etching wastewater treatment workshop floor, the storage area for acidic wastewater and regenerated liquid, and the hydrochloric acid storage area have not been equipped with anti-seepage and containment measures. In the event of a rupture in the electrolytic tank, storage tank, or conveying pipeline, the leaked acidic and alkaline liquid could enter the rainwater drainage system, directly flowing into the Laodao River in the Liuyang Industrial Park section, causing severe pollution to the river. 2. The liquid ammonia storage area and the alkaline wastewater treatment workshop have not been equipped with liquid ammonia leak water spray devices. 3. The uncontrolled emission of ammonia from the alkaline etching workshop is inadequate. 4. The hydrochloric acid for this project comes from the hydrochloric acid storage tank of the circuit board production line, located in the southeast corner of the building, approximately 10m from the acid treatment workshop (see Figure 3.2-1 Project Layout Plan), with a total of two storage tanks, each with a maximum capacity of 5 tons. This storage tank area has not been equipped with anti-seepage and containment measures. To address the above environmental issues, the following rectification measures are proposed: 1. Implement anti-seepage and containment measures in all production and storage areas of this project. The floors of the production and storage areas will be treated with a three-layer and five-coat anti-seepage and anti-corrosion treatment, followed by laying 6-8mm thick acid and alkali resistant PP boards, and then constructing containment walls around them, with the contained volume not less than the maximum storage capacity of the largest container in the area. The partitioned containment will be connected to a centralized pipeline leading to the emergency accident pool of the entire factory. In the event of a leakage accident, the leaked liquid will be directed through the pipeline into the emergency accident pool for storage and treatment, preventing the leakage of acidic and alkaline liquids into the rainwater drainage system, thereby avoiding pollution to the Laodao River. 2. Install liquid ammonia leak water spray devices in the liquid ammonia storage area and the alkaline wastewater treatment workshop. 3. Strengthen production supervision and management, establish a regular inspection and maintenance system for electrolytic equipment to ensure the sealing of the electrolytic tank and prevent ammonia gas leakage; enhance workshop ventilation. 4. Implement anti-seepage and containment measures in the hydrochloric acid storage tank area as part of the project 'new replacing old.' The containment volume must not be less than the maximum capacity of a single storage tank of 5 tons. 42 Hunan Lier Circuit Board Co., Ltd. Etching Wastewater Recycling System Project Environmental Impact Report Chapter 4 Environmental Status Investigation and Evaluation 4.1 Overview of the Natural Environment 4.1.1 Geographic Location Liuyang City is located in the northern section of the Luoxiao Mountains in eastern Hunan Province, bordering Tonggu, Wanzai, and Yichun in Jiangxi Province to the east; adjacent to Pingxiang in Jiangxi Province and Liling, Zhuzhou in Hunan Province to the south; leaning against Changsha to the west; and bordering Pingjiang to the north. It lies between 27°51′-28°34′ north latitude and 113°10′-114°15′ east longitude, with a width of 105.8 kilometers from east to west and a length of 80.9 kilometers from north to south, covering a total land area of 5007.75 square kilometers. The Liuyang Industrial Park is located on both sides of National Highway 319 (Yongliu High-grade Highway) at the junction of Yong'an, Dongyang, and Beisheng towns in Liuyang City, adjacent to the provincial capital, Changsha City, 25km east of Liuyang City, 35km west of Changsha City, 18km from Huanghua International Airport, 30km west of the Jingzhu Expressway, and 20km east of National Highway 106. The northeastern corner of the park is adjacent to Hengshan Xiaojizhen, and the southeastern corner is the location of the Dongyang Township government, with a superior geographical location, smooth logistics access, and very convenient transportation. The project site is located in the eastern expansion area of the Liuyang Industrial Park (southeast), south of Yuanzhi Road, surrounded by planned industrial land and land for enterprises entering the park, with no sensitive noise environment points. The projects already introduced in the eastern expansion area of the Liuyang Industrial Park include: to the west and east of the project site are mainly Lansi Technology (staff dormitory) and Lier Materials Company; to the southwest and south are respectively Jiaqing Environmental Protection and Shenli Capsules; to the north are Hunan Jintai and Interface Optoelectronics Company, etc. The project site is approximately 4100m northwest of the Laodao River and about 1800m east of the Dongyang River. About 3000m to the northwest is the park's water supply plant, and about 4000m is the park's sewage treatment plant, making water intake and discharge very convenient. The project site is about 1500m to 1800m west of the eastern area of the Liuyang Industrial Park (Kangdal Biotechnology Co., Ltd., Biopharmaceutical Park, and many pharmaceutical, functional food, and Yufengxiang Food Co., Ltd. enterprises), which is relatively far. The project site was originally low hilly terrain. For specific location, see Appendix 1. 4.1.2 Topography and Landforms The Liuyang Industrial Park is located in the hilly area of eastern Hunan, with a basic topography of low undulating hills, where bedrock is widely exposed, the mountain tops are rounded, and the slopes are gentle, with a gradient of 10-15°. The valleys are open and flat, with a small number of ponds and rice fields, featuring lush greenery and a high vegetation coverage rate. Overall, the terrain is higher in the southeast and lower in the northwest, with the highest point in the area at an elevation of 117.5m and the lowest point at the Laodao River at an elevation of 50.2m. The watershed along the southern mountain peaks extends east-west, with most of the precipitation in the eastern and western parks flowing naturally along the terrain into the Laodao River from south to north, while a small portion of the precipitation in the southern and western parks first flows west into the Dongyang River before heading north to the Laodao River. 43 Hunan Lier Circuit Board Co., Ltd. Etching Wastewater Recycling System Project Environmental Impact Report The regional landforms can be divided into erosion and denudation structural landforms, denudation structural landforms, and erosion accumulation plain structural landforms based on their formation. The denudation accumulation plain landforms are mainly distributed along both banks of the Laodao River, generally rising 1-10m above the river surface, with an elevation of 48-52m. They are primarily composed of Cretaceous Quaternary Holocene strata, with landforms of river floodplains and first-level terraces, slightly sloping towards the river. The southern and eastern parts of the park feature erosion and denudation structural landforms, with elevations ranging from 80-120m and a maximum height difference of 40m. They are composed of thick layered calcareous gravel and sandstone from the Cretaceous limestone group, exhibiting a banded distribution, with mountain shapes often appearing as isolated oval shapes, rounded mountain tops, and steep slopes, generally between 15-25°. The terrain is moderately dissected, with depths of 20-50m, and gullies are well-developed, often forming 'V'-shaped valleys. The western and southern parts of the park feature denudation structural landforms, primarily composed of Cretaceous Dai Jiaping group, Shenhuang Mountain group sandstone, and muddy gravel, mainly influenced by weathering and denudation, with rounded mountain tops, gentle slopes, and gradients of 10-15°, and the valleys are open and flat, with minimal terrain dissection depth. The project site has already been constructed, requiring no excavation for construction. The geological conditions in the area are good, with no adverse geological phenomena such as landslides, collapses, ground subsidence, or mudslides, and the seismic intensity is less than six degrees. 4.1.3 Hydrological Characteristics: The surface water in the area is not well developed, mainly consisting of the Laodao River in the northwest and its tributary, the Dongyang River in the east. Additionally, there are the Liyutang Reservoir, Taojiacong Reservoir, and Tuanjie Reservoir, along with a small number of fish ponds, totaling about 200 acres of water surface, with a maximum reservoir capacity of approximately 400,000 m3. The Laodao River is the largest water system in the area and a first-level tributary of the Xiangjiang River, originating from the northern slope of Shizhu Peak, with a total length of 141 km and a watershed area of 2543 km2, with a riverbed gradient of 0.78‰. In Liuyang, it flows through 17 townships, with a river length of 78.2 km, entering Changsha County at Yong'an and flowing into the Xiangjiang River at Laodao River Town in Changsha City. The watershed area within Liuyang City is 1135.08 km2. The area receives abundant precipitation, with an average annual water yield of 924 million m3. The surface composition in the watershed is mainly red rock, which has weak erosion resistance, a thick weathered loose layer, and a generally low vegetation coverage rate, making it one of the rivers in Liuyang City with serious soil erosion. The Laodao River flows from east to west through the northern part of the industrial park, with this section being the middle and lower reaches of the river. The riverbed elevation ranges from 46.5 to 52.0 m, and its water level varies significantly with the seasons, with the highest water levels typically occurring from April to June and the lowest during the dry season from November to the following March, belonging to the original flood cycle type. According to data from the downstream Luohanzhuang hydrological station, the difference between the highest and lowest water levels in this section can reach 9 m, with a maximum flow rate of ≥1000 m3/s, a dry season flow rate of 4.32 m3/s (90% guarantee rate), and a historical extreme minimum flow rate of 0.104 m3/s, with an annual average flow rate of 30.9 m3/s. The Laodao River is the only surface water source for the development, construction, production, and living in the Liuyang Biomedical Park and the wastewater body for the environmental impact report of the etching wastewater recycling system project of Hunan Lier Circuit Board Co., Ltd. Meteorological Characteristics: This area has a warm and humid subtropical monsoon climate, characterized by distinct seasons, ample heat, concentrated rainfall, variable humidity in spring, hot summers, dry autumns, and cold winters, with a long hot period. According to long-term observational data from meteorological departments, the average annual temperature is 16.4 to 18.2°C, with an extreme maximum temperature of 40.7°C and an extreme minimum temperature of -8.4°C; rainfall is concentrated from March to July, accounting for 64 to 80% of the annual precipitation, with an average annual evaporation of 1206.9 mm and an average annual rainfall of 1422.4 to 1556.4 mm, a maximum annual rainfall of 2010.9 mm, and a maximum daily rainfall of 276.1 mm. From July to September, evaporation exceeds precipitation; the maximum snow thickness is 20 cm, and the average relative humidity is 81%. The average annual sunshine hours are 1665.9 to 1717.3 hours, with a frost-free period of 276 days; the average annual wind speed is 2.2 m/s, with a maximum wind speed of 20 m/s. The prevailing wind direction throughout the year is from the west, with the prevailing wind direction in summer being from the southeast and in winter from the northwest. Socioeconomic Overview: Liuyang City has 6 streets, 25 towns, and 6 townships, namely Huai Chuan Street, Hehua Street, Jili Street, Guankou Street, Yong'an Street, and Dongyang Street, with a population of 1.44 million. Liuyang City is a county-level city administered by Changsha City in Hunan Province. It is one of the five key county-level cities under construction in Hunan Province and one of the more powerful counties and cities in China. Liuyang is a national pilot city for development and reform (small and medium-sized cities), ranking 47th in comprehensive strength nationwide and second in Hunan Province. In 2012, Liuyang was designated as a national pilot city for development and reform (small and medium-sized cities). Liuyang has been ranked among the top 100 counties in the country for several consecutive years. In 2012, Liuyang ranked 60th among the top 100 counties (cities) in the national county economy, and second in the central region. The economy of Liuyang City is supported by ten major industries, including fireworks, biomedicine, textiles and clothing, building materials, machinery manufacturing, mineral smelting, food processing, chemical plastics, bamboo and wood processing, and flower and seedling cultivation. Among these, fireworks, biomedicine, textiles and clothing, and flower and seedling cultivation are particularly influential. Overview of the National-Level Liuyang Economic Development Zone: The National-Level Liuyang Economic and Technological Development Zone (Changsha National Biomedical Industry Base) was approved by the National Development and Reform Commission in October 2006, centered around the Hunan Liuyang Biomedical Park, and is the only national-level biomedical industry base in the central and western regions and an important electronic information industry park in Hunan Province. The total planned area of the park is 13.4 km2, positioned as an eco-friendly high-tech industrial park supported by the pharmaceutical industry, food, and electronics. This park is the only and most modernized pharmaceutical development zone in Hunan Province and is a key technology park in Hunan Province's 'Ninth Five-Year Plan.' Its development and construction are important measures taken by the Liuyang City People's Government to achieve the goal of entering the top 100 cities in comprehensive economic strength nationwide and becoming the first in Hunan Province in the next few years, adjusting the city's industrial structure and productivity layout, and also an important initiative for Liuyang City to develop from an agricultural city to an agricultural strong city while optimizing the secondary industry and revitalizing the tertiary industry, vigorously promoting the strategy of 'new technology, intensive, export-oriented, high quality, high efficiency' and industrial city development. The planning control area of the Liuyang Economic Development Zone mainly involves 8 communities and villages in Dongyang and Beisheng towns of Liuyang City, with the eastern part of the planning area involving Jiaoxi Township and the western side involving Yong'an Town. The existing agricultural population is about 15,600, and the overall economic structure is still primarily agricultural, with a general living standard, mainly planting rice, and other economic incomes from oil tea, fruits, and aquaculture. Currently, there are more than 90 enterprises in the park, including 63 pharmaceutical companies, 40 high-tech pharmaceutical companies from home and abroad, 5 functional food companies, and 15 pharmaceutical technology service companies, with 25 companies having fixed asset investments of over 50 million and 5 companies over 100 million. Among the enterprises that have officially started production, many have successfully started businesses and formed scales, becoming well-known companies, such as Fengri Electric, Sqi Pharmaceutical, Jiuhui Pharmaceutical, Anbang Pharmaceutical, and Kang Shifu. In 2006, the total output value of industrial enterprises in the park exceeded 1.7 billion, with profits and taxes exceeding 120 million. With the continuous development of the park's construction and the further increase in investment attraction efforts, the industrial park economy will develop more rapidly. According to the 'Overall Planning of Liuyang Industrial Park,' combined with the current development status of Liuyang Industrial Park, the eastern area ranges from Huanyuan East Road in the west to the planned main road in the east, from Huanyuan North Road in the north to National Highway 319 in the south, covering a total area of 280 hectares (2.8 km2). It mainly focuses on the leading industries that combine mechanical, electronic, and food technology with labor-intensive advantages, relying on the overall advantages of Liuyang Industrial Park to form a modern new park that promotes comprehensive economic, social, and environmental development. Regional Pollution Source Investigation: Through data collection and on-site investigation and analysis, as of the end of 2012, the main pollution sources and pollutant discharge situation in the Liuyang Economic Development Zone are shown in Table 4.23-1. From Table 4.3-1, it can be seen that, except for the heating boiler of the Xin'ao Company, all existing enterprises using boilers in the park use fuel oil (diesel) gas. In the table below, the classification of pharmaceutical companies is based on the process category with the largest pollution from that company. For example, companies that have chemical synthesis, extraction, traditional Chinese medicine, and mixed preparation production processes are classified as chemical synthesis-type pharmaceuticals. Companies with extraction, traditional Chinese medicine, and mixed preparation production processes are classified as extraction-type. 4480 Piperacillin sodium, Sulbactam sodium powder injection, 2007.6.15, small amount of distillation, County Bureau, small amount of solution, 11,000 t/a Reactor residue, waste, 2009.3.27 Waste gas, mixed solvent, County Bureau, Hunan Erkang 2 Pharmaceutical Co., Ltd., synthesis, completed, production, medicinal raw and auxiliary materials, 200 acres, 5000 materials, 2009.12.31, small amount of distillation, City Bureau, small amount of solution, reactor residue, waste, 2010.3.26 Waste gas, mixed solvent, City Bureau, 425,000, Hunan Erkang 3 Xiangyao Pharmaceutical Co., Ltd., synthesis, completed, production, medicinal freeze-dried powder injection, 86610 4000 Solid preparations, finished medicine, 2009.12.31 t/a, small amount of distillation, City Bureau, small amount of solution, reactor residue, waste, 2010.3.26 Waste gas, mixed solvent, City Bureau, Hunan Warner 4 Large pharmaceutical factory Co., Ltd., synthesis, completed, production, medicinal, Moxifloxacin and other solid preparations, powder injection 39303, 8000 doses and some high-end raw materials, 2008.4.28, County Bureau, small amount of solution, small amount of waste mixed, 10,200 t/a, 2008.9.24 Waste gas, mixed solvent, County Bureau, Hunan Siji 5 Biopharmaceutical Co., Ltd., synthesis, completed, production, medicinal, BCG polysaccharide 45163 4385 nucleic acid injection, 2000.3.20, City Bureau, small amount of solution, 18,200 t/a, 2008.2.26 Waste gas, City Bureau, Hunan Jiudian 6 Pharmaceutical Co., Ltd., synthesis, completed, production, medicinal, Erythromycin, enteric-coated tablets, Zuo 40325 9000 Hydroxypropylpiperazine and preparations, 2004.10.11, small amount of distillation, Provincial Department, small amount of solution, 90,000 t/a Reactor residue, waste, 2008.1.2 Waste gas, mixed solvent, Provincial Department, Hunan Dino 7 Pharmaceutical Co., Ltd., synthesis, completed, production, medicinal, raw materials, 150 acres, 22087 doses, capsules, small amount of distillation, City Bureau, small amount of solution, 25,000 t/a Reactor residue, waste, 2011.12.29 Waste gas, County Bureau, mixed solvent, Hunan Kangyuan 8 Pharmaceutical Co., Ltd., production, completed, production, medicinal, 41461 1949 Large infusion, 2002.4.25, County Bureau, 18,000 t/a / 2004.9.29, County Bureau, Hunan Anbang 9 Pharmaceutical Co., Ltd., production, completed, production, medicinal, Baofuxin, Qingfei capsules, A 43505 3380 Moxifloxacin granules, Ampicillin capsules, 2004.5.26, County Bureau, 23,600 t/a / 2005.6.20, County Bureau, Hunan Tail 10 Pharmaceutical Co., Ltd., production, completed, production, medicinal, Anjuning, Ke 1895 1500 Bang, Weiting, etc., 1998.1.20, County Bureau, 65,000 t/a / 2000.3.28, County Bureau, Weite (Hunan) 11 Pharmaceutical Co., Ltd., synthesis, completed, production, medicinal, 67156 6000 Telmisartan tablets, 2003.11.21, County Bureau, 8750 t/a / 2004.12.14, County Bureau, Hunan Shouhu 12 Shen Pharmaceutical Co., Ltd., production, completed, production, medicinal, 44620 980 Bai'ai washing solution, 1999.1.16, County Bureau, 48,000 t/a / 2004.12.14, County Bureau, Hunan Agricultural University Veterinary Completed Veterinary drug injection, 2004.12.30 13 Animal pharmaceutical industry Medicine 19980 6350 Veterinary traditional Chinese medicine extraction, County Bureau, 5040t/a / Limited company Extraction Production Take 2006.5.17, 47 Hunan Lier Circuit Board Co., Ltd. Etching waste liquid recycling system project environmental impact report, Take County Bureau, 14 Hunan Meike Veterinary Biological Resources Co., Ltd. completed, production, Take, Bolehui injection, Jin Qiao Mai 28257 2800 powder, Huangling, Poria extract, 2006.11.3, County Bureau, small amount of waste Chinese medicine residue, 35,700 t/a, 2009.3.18 Odorous gas, 900 t/a, County Bureau, Hunan Dibo 15 Pharmaceutical Co., Ltd., production, completed, production, medicinal, 22943 1200 Oral solid preparations, 2002.11.12, County Bureau, 6250 t/a / 2004.6.10, County Bureau, Hunan Wuzhi 16 Feng Biochemical Co., Ltd. Veterinary medicine, completed, production, 26568 1000 series of drugs, 2004.4.25, County Bureau, 3250 t/ / 2005.6.8 County Bureau Changsha Dongfeng 17 Pharmaceutical Co., Ltd. Chinese Medicine Completed and Put into Production 36000 1600 doses 2001.12.12 City Bureau, Chinese Medicine Residue 20,500t/a / 2004.3.29 600t/a County Bureau 18 Changsha Shibi Veterinary Dragon Animal Medicine Co., Ltd. Completed and Put into Production Veterinary Injection, 16663 3000 tablets 2005.1.19 County Bureau 8160t/a / 2007.10.12 County Bureau Hunan Eurasia 19 Biotechnology Co., Ltd. Fermentation Completed and Put into Production Adefovir 30 acres 1300 (PMEA) 2008.7.8 Provincial Department Malodorous Fermentation Residue 0.2 million t/a 2009.11.19 Animal Health Medicine Co., Ltd. Completed and Put into Production 300t/a 20 Hunan Guang'an 13533 4980 Veterinary Injection 2004.12.23 County Bureau 10,200t/a / 2007.11.7 County Bureau 21 Hunan Baoli Biotechnology Co., Ltd. Completed Pilot Production Immobilized Enzyme, D-7-ACA, 96.2 acres 9995 D-para-hydroxyphenylglycine, Amoxicillin 2010.5.31 City Bureau 60,000 t/a / Currently applying for acceptance Hunan Yonghe 22 Sunshine Technology Co., Ltd. Completed Pilot Production 16 acres 3000 Diagnostic Reagents 3000t/a / Hunan Taifeng 23 Animal Pharmaceutical Co., Ltd. Completed and Put into Production Veterinary Medicine 13333 4980 Veterinary Injection 2005.2.28 County Bureau 5580t/a / 2007.11.7 County Bureau Changsha Yuhua 24 Disinfectant Co., Ltd. Completed and Put into Production 6673 1000 Medical Disinfectant 2004.12.23 County Bureau, 1300t/a / 2007.8.31 County Bureau Hunan Anxin 25 Pharmaceutical Co., Ltd. Completed and Put into Production Pediatric Acetaminophen 31400 1500 Namin Granules, Vitamin Phosphorus Supplement 2004.6.7 County Bureau, 5375t/a / 2005.6.8 County Bureau Hunan Mingrui 26 Pharmaceutical Co., Ltd. Completed and Put into Production Solid and Liquid Medicine 30197 1825 Formulations 2002.1.16 County Bureau 9550t/a / 2004.6.11 County Bureau 27 Hunan Lushan Natural Plant Medicine Co., Ltd. Completed and Put into Production Extracts, Granules and Infusions 20000 1282 doses, tablets, capsules 2002.3.20 City Bureau 112,500 Small Amounts of Solvent Residue 2004.9.29 t/a Waste Gas 1800t/a City Bureau 48 Hunan Lier Circuit Board Co., Ltd. Etching Waste Liquid Recycling System Environmental Impact Report 28 Hunan Nonferrous Kai Bo Biological Pharmaceutical Co., Ltd. Completed, Stopped Production 6-APA 100 acres 4170 Stopped Production for 2 Years 2008.11.6 Small Amounts of Distillation Provincial Department 64,800 Small Amounts of Residue, Waste 2009.11.19 t/a Waste Gas Mixed Solvent Provincial Department Hunan Yangmeng 29 Pharmaceutical Co., Ltd. Completed, Production Temporarily Suspended 4700 Songzhi Pill 2006.4.16 7,000 t/a City Bureau Hunan Tiandi 30 Hengyi Pharmaceutical Co., Ltd. Completed Not Put into Production Tablets, Granules, 38800 7000 Capsules, Pills 2006.2.24 City Bureau 11,600t/a / Not Accepted 31 Changsha Shibi Veterinary Dragon Animal Medicine Co., Ltd. Completed and Put into Production Veterinary Injection, Oral Liquid and Solution 16663 3000 Liquid, Powder, Tablets 2005.1.19 City Bureau 8160t/a / 2007.10.12 City Bureau Oral Solid Preparation Hunan Jintai 32 Pharmaceutical Co., Ltd. Completed Pilot Production Antitumor Lyophilized Powder 146495 29637 Injection, Antitumor Small Water Injection, Antitumor Raw Materials 2010.7.28 Small Amounts of Distillation Solvent Waste Provincial Department 60,000 t/a Residue, Waste Gas Not Accepted Mixed Solvent Hunan Yonghe 33 Sunshine Technology Co., Ltd. Pilot Production Medical Testing Diagnostic Reagents 20 acres 3240 2011.4.21 City Bureau 5040t/a / Currently processing acceptance procedures Hunan Shuntai 34 Biotechnology Co., Ltd. Biological Pharmaceutical Completed Not Put into Production 30 acres 2500 Heparin Sodium Crude Product 2011.5.10 Small Amounts of Malodorous Gas 44,700t/a City Bureau Pluronic Acid Changsha Kangping 35 Biotechnology Co., Ltd. Formulation Pharmaceutical has been established but not yet put into production for tablets and children's cough syrup. 1500 tablets, children's acetaminophen and chlorpheniramine tablets, 2011.5.24 / County Bureau Hunan Yuantong 36 Pharmaceutical Co., Ltd. Synthetic Pharmaceutical has been established but not yet put into production 195452. 5505 Diosmin 2011.3.14 Municipal Bureau 48,000 t/a. / Not accepted Changsha Baijia 37. Traditional Chinese Medicine Decoction Pieces Co., Ltd. Traditional Chinese Medicine has been established and put into production 16009. 1613 Traditional Chinese Medicine Materials Decoction 2003.8.28 County Bureau, 5537t/a. / 2005.3.8 County Bureau Hunan Chunguang 38. Jiuhui Modern Traditional Chinese Medicine Company has established and put into production Traditional Chinese Medicine ultra-fine decoction 38000. 4950 tablets 2008.5.29 County Bureau small amount of dissolved Traditional Chinese Medicine residue 16,500t/a 2013.5.20. Agent waste gas 1800t County Bureau Changsha Tianci 39. Biopharmaceutical Technology Company Medical Pharmaceutical has not been established Combination of biological synthesis 24 acres 3582. Achievements in natural product research 2012.7.23 Municipal Bureau 2255t/a. / Hunan Yuxiang 40. Biotechnology Co., Ltd. Veterinary Drug Formulation is under construction Veterinary drug injections, powders, granules, 18247. 4500 fish medicine, disinfectant 2011.12.27 5940t/a. / County Bureau 41 Hunan Weigao Biotechnology has not been established 60 acres 7500. Heparin sodium 2011.11.3. Small amount of foul-smelling gas 48,700t/a Municipal Bureau Hunan Lier Circuit Board Co., Ltd. etching waste liquid recycling system project environmental impact report. Pharmaceutical Hunan Kaiyuan 42. Pharmaceutical Technology Co., Ltd. Medical Pharmaceutical Synthetic is under construction Anti-AIDS, Anti-hepatitis B, Anti 11133.4. 2500 Oral liquid for mental illness and supporting raw materials small amount of distillation 2011.12.15. Solvent waste 30,000 t/a. Furnace residue, waste gas mixed solvent small. 1.826 million calculated. t/a 2 Health food category Yanjin Puzhi Food Co., Ltd. construction situation has been established and put into production occupies a total investment area main products candied fruit, flavoring 76606. 11000 Food, bulk candied fruit air pollution environmental assessment, acceptance total wastewater solid waste 2008.4.28 County Bureau small amount of foul-smelling biomass residue 170,000 t/a 2009.2.16. Foul-smelling gas 900t/a County Bureau 2 3 Green Rhythm Biotechnology Group Co., Ltd. Changsha Fuman Duo Food Co., Ltd. has been established and put into production food 27988. 5000 Health products 96225. 8270 Instant noodles 2004.7.2 County Bureau 1,900t/a. / 2008.7.4 County Bureau 2005.1.28 County Bureau,