城市污水处理中存在的问题及对策（Problems and Countermeasures in municipal wastewater treatment）.docVIP

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城市污水处理中存在的问题及对策（Problems and Countermeasures in municipal wastewater treatment）.doc

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城市污水处理中存在的问题及对策（Problems and Countermeasures in municipal wastewater treatment）

城市污水处理中存在的问题及对策（Problems and Countermeasures in municipal wastewater treatment） Problems and Countermeasures in municipal wastewater treatment The problems and Countermeasures of city sewage treatment in: the current situation of wastewater treatment in China City, analyzes the existing overload for city sewage treatment process existing in the process of selection, operation stability, nitrogen and phosphorus removal of sewage treatment facilities and old problems, and to solve the above problems, combined with the status quo of economic development in our country, put forward a solution to the enhanced primary treatment of city sewage. Problems and Countermeasures in municipal wastewater treatment: key words: municipal wastewater; nitrogen and phosphorus removal; overload; enhanced primary treatment 1 status of municipal wastewater treatment in China In China, solving the pollution problem of city sewage began in 1970s, some city by suburban pond depressions, rivers, marshes and other waste minor renovations or embankment dams built on stabilization ponds, city sewage purification. In 1980s, with the acceleration of urbanization and the increasing attention to urban water pollution, the construction of urban drainage facilities has developed rapidly. Chinas first large factory in Tianjin Jizhuangzi sewage treatment plant in 1982 started the city sewage treatment, in April 1984 2813 completed and put into operation, the treatment scale is 260 thousand ITl3, D. Subsequently, Beijing, Shanghai, Guangdong, Guangxi, Shaanxi, Shanxi, Hebei, Hunan, Jiangsu, Zhejiang, Hubei and other provinces and cities built dozens of sewage treatment plants of different sizes in accordance with their specific conditions. By the end of 2003, the city has been the construction of 427 sewage treatment plants, of which two processing plant 282, but there is no sewage treatment plant there are 61.5% of the city, the vast majority of small towns have not built any sewage treatment facilities