Process Design Analysis of Domestic Sewage Treatment Station in a Village in Beijing
The rapid development of villages and towns in the east of Beijing City has led to the increase of the total amount of domestic sewage in the villages and towns.Some villages and towns have not set up sewage treatment stations,resulting in direct sewage discharge situations,which seriously pollute the ecological environment of the villages and towns.By analyzing the quantity and quality of sewage of villages and towns in Beijing area,the sewage treatment technology is compared.It is determined that the project treatment scale is design to 2000m3/d,and the main process is improved AAO+high-density sedimentation tank+filter cloth filter.The treated water quality can meet the requirements of B standard in Beijing landmark"Discharge Standard of Water Pollutants for Urban Sewage Treatment Plants"(DB11/890-2012).Among them,the improved AAO adopts BMR biochemical tank and utilizes enamel tank assembly technology,which can achieve fast construction progress and short period of modular layout,providing certain reference for the sewage treatment of villages and towns in northern China.
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