西北某农村生活污水处理工艺设计分析

Design and Analysis of a Rural Wastewater Treatment Process in Northwest China

农村生活污水由于缺乏污水收集管道和处理设施,大量污水得不到有效处置,严重影响农村水环境和村民身体健康。通过分析西北某农村的污水水质水量,结合当地实际情况,比选确定了最适合的污水处理工艺,即“预处理+AO+膜生物反应器(MBR)”工艺的智能一体化污水净化系统。运行结果表明,处理后水质能够满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准,同时具有管理简单、自动化程度高等特点,适宜各类小规模污水处理,对西北农村污水处理具有一定借鉴意义。

Due to the lack of wastewater collection pipelines and treatment facilities for rural domestic wastewater,a large amount of wastewater can′t be effectively treated,which seriously affects the rural water environment and the health of villagers.Based on the analysis of the quality and quantity of wastewater water in a rural village in northwest China,combined with the actual local conditions,the most suitable wastewater treatment process is selected,that is,the intelligent integrated wastewater purification system of"pretreatment+AO+membrane bioreactor(MBR)"process.The operation results show that the effluent indices can stably reach the first class A criteria of the Discharge Standards of Pollutants for Municipal Wastewater Treatment Plants(GB 18918—2002),and have the characteristics of simple management and high degree of automation,which is suitable for all kind of small-scale wastewater treatment.And it has certain reference significance for the wastewater treatment inrural areas in northwest China.