THE REVIEWING AND EXPECTATION OF THE DEVELOPMENT ON URBAN SEWAGE DISPOSE TECHNIQUE

Along with the program of the water environmental pollute being raised,the urban sewage dispose technology has gone through 100 years of development.Based on the history of development urban sewage dispose technique,the thesis introduces the two main methods of urban sewage dispose:active-sewage and biologic-velum,the development procedure as well as development direction in view of water quality target and the applying of two main methods of urban sewage dispose——activated sludge system and biofilms system.Aiming at the disadvantage of traditional urban sewage dispose methods,the thesis introduces several new techniques.Finally,the development of urban sewage dispose technique in 21st century is forecasted.