Zhejiang Province issued the "Electroplating Water Pollutant Discharge Standards", stipulating 20 pollutant indicators

Release time：2024-09-24click：0

Recently, Zhejiang Province issued the "Electroplating Water Pollutant Discharge Standard" (DB 33/2260-2020) (hereinafter referred to as the "Standard"), which will be officially implemented on July 1. Electroplating is an indispensable part of the manufacturing industry and an important supporting part of the industrial chain, involving many industries and fields such as electronics, electrical appliances, machinery, pumps and valves, medical equipment, permanent magnet materials, automobile and motorcycle parts, and hardware. Zhejiang Province is a major electroplating province, ranking second in the country. The promulgation of the "Standards" will further strengthen the water pollutant emission control and water environment risk management and control in the electroplating industry in Zhejiang Province, and promote the healthy development of the electroplating industry.

The "Standards" fully consider the actual situation of electroplating enterprises in Zhejiang Province, focus on the control of heavy metal pollutants, and increase the requirements for water pollutants in centralized sewage treatment plants that specialize in the treatment of electroplating wastewater. Emission management, and the necessary connection with the "Pollutant Emission Standard for the Electroplating Industry" (GB 21900-2008) (hereinafter referred to as the "National Standard"), electroplating emission license management requirements, etc.

In terms of indicator setting, the "Standard" stipulates 20 pollutant indicators such as total chromium and hexavalent chromium. The number of indicators is consistent with the national standard.

　Direct emissions

The Taihu Basin area is required to continue to strictly implement the special emission limit requirements of Table 3 of the national standard; in other areas, except for total cadmium and total nickel, the heavy pollutants involved are appropriately wider than those in Table 3 of the national standard (stricter than the requirements of Table 2 of the national standard), and the remaining heavy metals The indicators are consistent with the national standard Table 3; the conventional pollutant indicators COD, ammonia nitrogen, and total nitrogen are connected with the national standard Table 2, and the other indicators are consistent with the national standard Table 3.

　Indirect emissions

The "Standard" clarifies the indirect emission requirements for five pollutants: total copper, total zinc, pH, fluoride, and total cyanide, which is conducive to indirect emission control in the electroplating industry and reduces the risk of meeting emission standards through dilution in the pipeline. At the same time, for other negotiable indicators, special provisions are made for the discharge to centralized sewage treatment plants and centralized sewage treatment facilities that specialize in the treatment of electroplating wastewater.

The "Standards" are moderately forward-looking and stipulate that new enterprises must be approved in accordance with the national Table 3 standards to avoid the need for enterprises to invest in rectification costs again due to subsequent improvements in standards.

The "Standard" stipulates that newly built and existing electroplating sewage discharge units and centralized sewage treatment plants specializing in the treatment of electroplating wastewater in the Taihu Lake Basin will implement the discharge requirements of this standard starting from July 1, 2020. Based on the current status of the electroplating industry in various parts of Zhejiang Province and the impact of the epidemic, a certain transition period will be given to existing companies in other regions to implement standard emission requirements, which will be implemented from July 1, 2021. In order to further encourage entry into the park, existing electroplating pollutant discharge units included in the park entry list will be given an additional half-year transition period for rectification, which will be implemented from January 1, 2022.

After the implementation of the "Standards", the water pollutant emission requirements for the electroplating industry in Zhejiang Province will be further scientifically optimized, which will help promote the reduction of heavy metal emissions in the industry. Only in Wenzhou due to the tightening of relevant heavy metal indicators, It is estimated that heavy metal emissions can be reduced by 50%. At the same time, there is pressure to eliminate some backward production processes, forcing the industry to further gather and improve, and promote centralized management of the park.

　(Original title: Zhejiang Province issued the "Electroplating Water Pollutant Discharge Standard", stipulating 20 pollutant indicators)