During the "11th Five-Year Plan" period, the water pollution prevention and control plans for the Huaihe River, Haihe River, Liaohe River, Chaohu Lake, Dianchi Lake, Songhua River, the Three Gorges Reservoir Area and its upper reaches, and the middle and upper reaches of the Yellow River, among others, arranged a total of pollution control projects2712Individual, investment1600One billion yuan. cutting2008years9The month has passed and it has been completed881A, under construction960One, complete the investment510One billion yuan.2008Annual investment in industrial wastewater treatment194.6One billion yuan.

At present, the biological activated sludge process is mainly adopted for urban sewage treatment. At present, the more typical secondary treatment processes that have been formed include: traditional activated sludge processAB"Law,A/O"Craftsmanship,A2/OProcess, oxidation ditch processICEAS"Craftsmanship,CASS"Craftsmanship,SBBR"Craftsmanship,BIOLAKTechniques, etc. Among them, the oxidation ditch process andCASS"Process"(CASS"Process andBIOLAKThe process is a relatively new one).

At present, the methods for treating industrial wastewater in China include: membrane technology, magnetic separation technologyFentonAnd classesFentonOxidation method, ozone oxidation, wet type(Catalysis)Oxidation, plasma water treatment technology, electrochemistry(Catalysis)Oxidation, ultrasonic oxidation, radiation technology, photochemical catalytic oxidationSCWO(Supercritical water oxidation)Technology, iron-carbon micro-electrolysis treatment technology.

To promote the healthy development of the sewage treatment industry and improve the legal norms for various sewage discharge charges and the supervision and management of sewage resource utilization;Promote the circular economy development model and adopt it when establishing new industrial enterprises or upgrading and transforming themBATTechnology is adopted to achieve the reduction, recycling and reuse of raw materials, with "wastewater resource utilization" as the foundation, to reduce the generation of wastewater and pollutants from the source.

We will make efforts to promote structural emission reduction, intensify the elimination of backward production capacity in industries such as papermaking, brewing and dyeing, and vigorously advance technological transformation;Actively promote the treatment and resource utilization of rural sewage. These measures reversed the unfavorable trend of water pollution continuing to deteriorate while the national economy was developing rapidly, and improved the water environment.

According to the report analysis, it is necessary to strengthen the control over emissions from pollution sources, and industrial enterprises should adopt advanced treatment to achieve stable and compliant emissions;In addition to continuing the construction of sewage treatment plants, it is necessary to strengthen the operation supervision of the existing ones, including increasing the load rate of sewage treatment plants, improving the sewage collection network, constructing and operating sludge treatment and disposal facilities, and utilizing reclaimed water, etc.