On March 23, 2018, Huajing Precision Manufacturing Co., Ltd. based on the “Environmental Protection Acceptance Monitoring Report of the Annual Production of 350 Million Micron Diamond Line Project of Huajing Precision Manufacturing Co., Ltd.†compiled by Henan Ruiant Environmental Technology Co., Ltd. The Interim Measures for the Environmental Protection Acceptance of Completion of Construction Projects shall be subject to the acceptance of the project in strict accordance with the relevant national laws and regulations, the technical specifications for the completion of environmental protection acceptance of construction projects, the environmental impact assessment report of the project and the approval decision of the examination and approval department.
I. Basic situation of engineering construction
(1) Construction site, scale, and main construction contents
Huajing Precision Manufacturing Co., Ltd. is located in the Zhengzhou Export Processing Zone of Henan Province, north of the North Fourth Road and west of the 10th Street. The north side of the project is open space, the west side is the factory building, the south side is the road, and the road is the factory building. The side is empty. (Li Nangang Village in the northeast is 150 meters away from the project). The total investment of the project is 260.71 million yuan, the labor capacity is 150, the annual effective working day is 300 days, the three-shift system is 8 hours per shift. The main buildings of the project include office buildings, sewage treatment stations and production workshops.
(II) Construction process and environmental protection approval
The Environmental Impact Report of Huajing Precision Manufacturing Co., Ltd. with an annual output of 350 million meters of micron diamond line project was completed in September 2014 by Henan Chemical Industry Research Institute Co., Ltd., and passed Zhengzhou City on October 29, 2014. Environmental Protection Agency approval [Zheng Huan Ju (2014) No. 260]. The project started construction in February 2015 and was completed in June 2017. It has obtained the incremental index (project number) approved by Zhengzhou Environmental Protection Bureau. In July 2017, the project was commissioned, and there were no environmental complaints, illegal or penalized records from the project establishment to the commissioning process.
(3) Investment situation
The actual total investment of this expansion project is 260.71 million yuan, and the actual investment amount of environmental protection is 600,000 yuan, accounting for 0.22% of the actual total investment. Among them, the waste gas treatment is 15,000 yuan, the wastewater treatment is 350,000 yuan, the noise control is 50,000 yuan, the solid waste treatment is 100,000 yuan, and the other treatment is 85,000 yuan.
(4) Acceptance scope
The acceptance content is the acceptance of the exhaust gas, wastewater, noise and solid waste of Huajing Precision Manufacturing Co., Ltd. with an annual output of 350 million meters of micron diamond line.
Second, the project changes
In the actual construction of this expansion project, the sulfuric acid mist waste gas treatment will be replaced by a 15m high exhaust pipe at high altitude and discharged through 5 15m exhaust pipes at high altitude. The air compressor will be changed from the original 10 units. It is 7 sets of high-power air compressors. In order to meet the needs of individual customers, the micron diamond line will increase the edge cutting process to sharpen the diamond line. However, there has been no major change in the main project, and the production scale of the production process is still 350 million meters per year.
Third, the construction of environmental protection facilities
(1) Waste water
The drainage situation during the operation period of the project is as follows:
After the expansion project was completed and put into production, the labor quota was 150 and the annual work was 300 days. The water is mainly used for production water and domestic water for employees. The fresh water consumption is 14924.4m3/a, and the wastewater is 10019.9m3/a. The production wastewater (including nickel) is treated by nickel-containing wastewater treatment equipment (mechanical filtration + ultrafiltration + reverse osmosis). After treatment, it enters the workshop sewage treatment station, and after sedimentation and neutralization, it is remitted into the total discharge, and finally enters the Wang Xinzhuang sewage treatment plant; the production wastewater (excluding nickel) is precipitated by the workshop sewage treatment station, and then remitted into the total discharge after being neutralized; The domestic wastewater is treated by the FRP septic tank and then sent to the main row, and finally enters the Wang Xinzhuang Sewage Treatment Plant.
(2) Exhaust gas
The exhaust gas of this expansion project is mainly sulfuric acid mist waste gas generated by electroplating and pickling processes.
The sulfuric acid mist exhaust gas generated by the electroplating and pickling processes is collected and discharged through five 15 m high exhaust cylinders.
(3) Noise
The noise sources in the production process of this expansion project mainly include noise generated by the operation of high-noise equipment such as air compressors and motors. The air compressor adopts the installation of the damping base. The motor is sound-insulated by the plant and the noise is reduced by distance attenuation.
(4) Solid waste
1. Hazardous waste
The waste filter cotton, nickel-containing waste activated carbon and sewage treatment sludge generated in the production process of this expansion project belong to dangerous solid waste, and are collected in temporary hazardous waste space and handed over to Henan Tianchen Environmental Protection Technology Co., Ltd. for safe disposal.
2, production of solid waste
The particulate matter produced in the expansion process of this expansion project belongs to the production of solid waste, which is regularly cleaned by the enterprise.
3, domestic garbage
The expansion project has a labor quota of 150 people. The employee's domestic garbage is generally solid waste. It is stacked by the enterprise, processed in time, and transported to the garbage transfer station for processing.
Fourth, the effectiveness of environmental protection facilities commissioning
(1) Discharge of pollutants up to standard
Waste water
The wastewater is mainly used for the production of wastewater and domestic sewage. The production wastewater includes: electroplating, pickling, water washing, and daily flushing of wastewater in the workshop. The electroplating nickel-containing wastewater is treated by the nickel-containing wastewater treatment device, and the concentrated water is reused to supplement the plating solution loss. The water is reused for production, and the nickel-containing wastewater and washing water are discharged to the workshop sewage treatment device. The nickel-free waste alkali, waste acid washing tank liquid and flushing water are introduced into the sewage treatment device by the workshop sewage pipeline, and then processed into the total discharge, and finally enter the Wang Xinzhuang sewage treatment plant. The washed wastewater is treated by the wastewater treatment device and then transferred to the main row, and finally enters the Wang Xinzhuang Wastewater Treatment Plant. The domestic sewage is separately treated by the FRP septic tank and then sent to the main row by the domestic sewage pipe, and finally enters the Wang Xinzhuang sewage treatment plant.
During the acceptance monitoring period, the pH value, chemical oxygen demand and total daily nickel concentration of wastewater discharged from the sewage treatment station of the workshop are in compliance with the standard limit requirements of Table 2 of the Electroplating Pollutant Emission Standard (GB21900-2008) (pH: 6). ~9, chemical oxygen demand: 80mg / L, total nickel: 0.5mg / L); the total value of the pH and chemical oxygen demand, suspended solids, ammonia nitrogen in the wastewater discharged from the total discharge of the plant area are in line with the "discharge comprehensive discharge" Standard (GB8979-1996) Table 4 secondary standard limit requirements (pH: 6 ~ 9, chemical: chemical oxygen demand 150mg / L, suspended matter: 150mg / L, ammonia nitrogen: 15mg / L).
Exhaust gas
During the acceptance monitoring period, Huajing Precision Manufacturing Co., Ltd. has an annual output of 350 million meters of micron diamond line expansion project. The sulfuric acid mist generated by the electroplating and pickling sections is collected and converged and discharged through five 15 m high exhaust pipes. Electroplating Pollutant Emission Standard (GB21900-2008) Table 5 standard limits (sulfuric acid mist emission concentration: 30mg/m3, exhaust pipe height 15m) requirements.
3. Factory boundary noise
During the acceptance monitoring period, the daytime and nighttime noise monitoring results of the east, south, west and north of the project are in line with the Class 3 standard limits of the Environmental Noise Emission Standard for Industrial Enterprises (GB12348-2008) (昼65 ((昼) A), at night ≤ 55dB (A)) requirements.
4. Solid waste
During the inspection and acceptance period, the domestic garbage generated by the project will be regularly cleared and transported; the filter element, nickel slag, waste activated carbon and waste resin produced in the production process will be temporarily stored in the hazardous waste after being collected, and will be handed over to Henan Tianchen Environmental Protection Technology Co., Ltd. for safe disposal.
5. Total pollutant discharge
The actual emission of the project is COD: 0.422 tons/year; meeting the total emission index of the whole plant, the actual discharge of production wastewater is COD: 0.068 tons/year, meeting the incremental index (project number) approved by Zhengzhou Environmental Protection Bureau. related requirements.
V. Impact of project construction on the environment
1. Huajing Precision Manufacturing Co., Ltd. Annual production of 350 million meters of micron diamond line expansion project The sulfuric acid mist generated in the electroplating and pickling sections is collected and converged and discharged through five 15 m high exhaust pipes. The emission concentration meets the electroplating pollution. Table 5 Standard Limit Requirements for Emission Standards (GB21900-2008).
2. Huajing Precision Manufacturing Co., Ltd. Annual production of 350 million meters of micron diamond line expansion project The monitoring results of daytime and nighttime noise in the east, south, west and north of the plant are in line with the "Environmental Noise Emission Standard for Industrial Enterprises Boundary" (GB12348- 2008) Category 3 standard limit requirements.
3. Huajing Precision Manufacturing Co., Ltd. Annual production of 350 million meters of micron diamond line expansion project The pH value of the wastewater discharged from the sewage treatment station and the daily average concentration of total oxygen are in line with the "Electroplating Pollutant Emission Standard" (GB21900-2008) Table 2 standard limit requirements; the pH value of the external discharge of wastewater in the plant area and the daily average concentration of chemical oxygen demand, suspended solids and ammonia nitrogen are in line with the "Integrated Wastewater Discharge Standard" (GB8979-1996) Table 4 Secondary standard limit requirements.
4. Huajing Precision Manufacturing Co., Ltd. has an annual output of 350 million meters of micron diamond line expansion project. The domestic garbage is regularly cleared and transported; the filter element, nickel slag, waste activated carbon and waste resin produced in the production process are temporarily stored in the hazardous waste after collection. Safely disposed of by Henan Tianchen Environmental Protection Technology Co., Ltd.
Sixth, acceptance conclusion
1. According to the environmental impact report and the approval requirements of the approval department, the exhaust gas generated in the electroplating and pickling sections is installed with the corresponding exhaust pipe and collected at high altitude. The high-noise equipment is shock-absorbing and sound-proof, and the environmental protection facilities are operated. normal.
2. The emission concentration of sulfuric acid mist in the exhaust gas emitted by the project complies with the standard limit requirements of Table 5 of the Electroplating Pollutant Emission Standard (GB21900-2008), and the noise emission complies with the Environmental Noise Emission Standard of Industrial Enterprises Boundary (GB12348-2008)3 Class standard limit requirements, the pH value and chemical oxygen demand in the wastewater discharged from the sewage treatment station of the workshop, and the daily average concentration of total nickel are in compliance with the standard limit requirements of Table 2 of the Electroplating Pollutant Emission Standard (GB21900-2008); The pH value and the daily average concentration of chemical oxygen demand, suspended solids and ammonia nitrogen in the wastewater discharged from the total discharge are in compliance with the Class 2 standard limit requirements of Table 4 of the Integrated Wastewater Discharge Standard (GB8979-1996). The chemical oxygen demand (industry) and ammonia nitrogen (industrial) total emission control indicators meet the requirements.
3. There have been no major changes in the nature, scale, location and production process of the project.
4. The project did not receive complaints from residents during the initial stage of construction and during the trial production period, and was not punished by relevant departments.
5. The main project and environmental protection facilities of the project are basically completed and put into operation according to the EIA and approval. It belongs to the whole experience and acceptance. The ability of environmental protection facilities to prevent environmental pollution and ecological damage can basically meet the needs of their corresponding main projects.
6. The basic data of the acceptance report is true and effective, the content is basically perfect, and the acceptance conclusion is basically clear and reasonable.
To sum up: the environmental protection facilities of the construction project do not exist in the “Interim Measures for Environmental Protection Acceptance of Completion of Construction Projectsâ€. Article 8 of the National Environmental Impact Assessment (2017) No. 4, according to the opinions and suggestions put forward by the acceptance group, in principle, after rectification pass the inspection
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