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Application and Development of Membrane Separation Technology in Electroplating Industrial Wastewater Treatment

2017-09-11 11:16:48

Application and Development of Membrane Separation Technology in Electroplating Industrial Wastewater Treatment

In recent years, especially in 2010, as a new separation technology, membrane separation technology can effectively remove the waste water color, odor, remove a variety of ions, organic matter and microorganisms, but also to recover some of the material, In the industrial wastewater treatment and deep water treatment has been a comprehensive, rapid application and development.

The management and discharge of industrial wastewater has been monitored by the state. Industrial production process requires a lot of fresh water, but also discharge entrained heavy metals, toxic chemicals, acid, organic matter, oil, suspended solids and other toxic and hazardous substances in a large number of waste water. Compared with the municipal sewage, industrial wastewater has a complex composition, high concentration, environmental toxicity, involving many industries and other characteristics, leading to governance is extremely difficult. According to statistics, in 2015, China's industrial wastewater discharge of 19.55 billion tons, accounting for 27.1% of total wastewater discharge; industrial wastewater treatment capacity of 44.46 billion tons, treatment facilities processing capacity of 250 million tons / day, the annual operating costs of 685 Billion yuan.

Electroplating and PCB heavy metal wastewater treatment film application rate of about 70%

Electroplating is the focus of heavy metal wastewater discharge industry. ro membrane installation China's electroplating enterprises a wide range of wide, according to incomplete statistics, the number of enterprises on the scale of about 15,000. In recent years, with the regional government on the rectification of heavily polluting enterprises, electroplating enterprises have reduced the number of trends, and mainly gathered in the electroplating park.

As a state-controlled enterprises, electroplating wastewater treatment has been the focus of attention. The survey found that between 2000 and 2010, has been put into operation of the electroplating wastewater treatment technology for the chemical precipitation method, the film market application rate of about 20% -30%. In 2008, the Ministry of Environmental Protection issued the "Electroplating Pollutant Discharge Standard" (GB21900-2008) (hereinafter referred to as "standard"), put forward the more stringent implementation of sensitive areas in Table 3 standards. Compared with the limit of surface discharge of wastewater in some countries of the EU, the strict standard of pollutant discharge in the standard is in the middle and upper reaches, and the chemical oxygen demand, phosphorus and other nonmetallic pollutants are included in the surface water Pollutant emissions control is also more stringent. After the implementation of the new "standard", COD, ammonia nitrogen, total nitrogen, total phosphorus and other biochemical indicators due to poor biochemical biodegradation, conventional chemical precipitation plus AO or A2O process can not be processed, is the main factor exceeding the standard, while copper, Excessive main heavy metal factor.

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