| There are great changes in society aspects in Changchun city, and city construction makes more progress than ever before.but the fearful imbalance between water supply and sewage treatment let a mass of living sewage and industrial effluent into close-by river. Water quality is then heavily polluted, influenced entironment badly, and influenced city's sustainable development. So it is vital importance of building municipal wastewater treatment plant to protect environment.Owing to the water pollution status,the paper analyzed the feasibility and design of the sewage treatment plant in the south Changchun.The author makes a technical comparison on existed wastewater treatment processes, sludge treatment at homes and abroad, run toA2/Ohandicraft foul water factory design , starting , long-time running effect has carried out the systematic summary and thorough investigation and discussion, the project accomplished A2/O handicraft sewage treatment in secondary effluent of sewage.The theory research to A2/O handicraft is concentrated on several aspect mainly: (1) A2/O handicraft's get rid of phosphorus mechanism and effect (2) A2/O handicraft's escape from nitrogen mechanism and effect But, the reality to A2/O handicraft produces operation under the control of studying taking lack seriously. The author has run toA2/Ohandicraft foul water factory design , starting , long-time running effect has carried out the systematic summary and thorough investigation and discussion. Research thinks: The A2/O handicraft has BOD , COD , SS takeoff rate water than high takeoff , has higher takeoff rate to the phosphorus, A2/O handicraft having out- water stabilization, putting up water phosphorus contents low , precipitate a function out well , run way nimbly, the sludge does not expand to wait for a lot of merit , this handicraft already becomes one kind of main handicraft form of sewage treatment factory , already gradually, mature and arouse extensive use.Water resources are seriously insufficient in china,and the reuse of sewage effluent is an important method to alleviate the shortage of the water resources.Base the natural resource of water in Changchun is far from fulfil the development demand of city. Compare with empolder other waterhead, deep treatment for reuse has considerable economic advantage,and it also reduce environment pollute by equivalent sewage let. The paper has probed into water reuse technics. water reuse treatment adopt coagulation-sedimentation, filtration, Sludge vent to waterspout. And confirmed water distribute meshwork of reuse water.In the process of experiment, base basal condition of sewage treatment plant in the douth of Changchun and design principle, the author has accomplished the design and optimize of sewage, Sludge and reuse water treatment building. And also has insisted that the tracking being in progress to detecting index every day observes , has analysed almost thousand together having the effect data, large amount of data has demonstrated write brought forward the theory correctness , can't be a thesis this at the same time by author has laid down solid basis.The paper analyzed the effect to environment by the process of item and deodorization after project, how to settle the problem, and the venture analysis after the sewage treatment plant has completed.A2/O sewage treatment handicraft that this research institute studies, already, sewage treatment having the actual project , the thesis research to have identical handicraft or the close handicraft to other in many city of the whole nation range inner the factory design , runs and has under the control of certain reference value. Investigation and discussion that these evidently experience, the operation under the control of being a sewage treatment factory is provided drawing lessons, has the significant economic effect , social benefits and environmental benefits to development of the cause driving our country sewage treatment. Keywords: A2/O handicraft operation under the control design...
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