A rural domestic sewage treatment project design and operation effect
Based on the characteristics of rural domestic wastewater,a pre-treatment+integrated treatment system(anaerobic tank,anoxic tank,sedimentation tank,aerobic tank)+sand filtration process is adopted to achieve the Class A standard discharge of"Pollutant Discharge Standards for Urban Sewage Treatment Plants"(GB 18918-2002).The operation and maintenance are efficient and convenient.During on non-heavy rainfall or other unexpected conditions,the effluent quality is stable and operating cost just approximately 1.75 yuan/m3,which are technically and economically feasible.Based on the issues encountered during engineering operation and maintenance,it is recommended to continue optimizing and improving appropriate rural wastewater treatment technologies.At the same time,it is necessary to further increase the construction of rainwater and wastewater diversion systems for rural domestic wastewater,so as to increasing the influent concentration of wastewater and,reduce the cost and volume of treated-wastewater.
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