城市污水处理（Municipal Wastewater Treatment）.doc

城市污水处理（Municipal Wastewater Treatment） City sewage treatment technology The process of sewage treatment process of city sewage treatment A city sewage treatment process one by one A, ,, Overview Overview overview Summary with the city to speed up the process and improve the living standards of city sewage emissions increased year by year water pollution situation More serious has become a serious obstacle to the sustainable development of economy. Therefore increase focus on efforts to deal with the city sewage ten Necessary. Compared our city sewage recycling is still in its infancy and some developed countries. City Wastewater Reuse There has been a long history of Israel water reuse rate from 8 in 1974 to share the development of the current more than 80 share in foreign countries The United States has taken more than 350 city wastewater reuse treatment plant in Tokyo will be Japan Island sewage treatment Sanhe The water for more than 300 factories. The traditional sewage treatment with physical treatment, chemical treatment and biological treatment. In real When the sewage treatment these methods often used in combination form a variety of different sewage treatment process. Such as anaerobic aerobic Physical method (A/O method), anaerobic anoxic aerobic treatment method (A2/O method), continuous cycle aeration method (oxidation ditch), sequencing batch. Oxygen activated sludge or intermittent activated sludge method (SBR method). Two 22 Two, ,, And several kinds of sewage treatment process Sewage treatment process of sewage treatment process of several several Sewage treatment technology of some 2.1 2.1 2.1 2.1 oxidation ditch Oxidation ditch oxidation ditch Oxidation ditch is a variant of activated sludge of the aeration tank was a closed shape the aeration tank was closed ditch shape Sewage and activated sludge in the circulating and hence the name. Also known as the circular aeration tank, non terminal exposure Gas system. The oxidation ditch has unique tech