南水北调中线MBR-AOP系统处理农村生活污水的试验研究

Research on MBR-AOP for Treatment of Rural Domestic Sewage in the Middle Route Project of South-North Water Transfer

在南水北调中线湖北十堰水源区,采用膜生物反应器(MBR)与高级氧化消毒(AOP)技术相结合的组合工艺MBR-AOP系统处理农村生活污水,考察了该工艺对CODCr、BOD5、NH3-N和浊度的降解效果,实验结果表明,在水温大于20℃、pH在6～8的条件下,工艺对CODCr、BOD5、NH3-N和浊度的降解效果好,平均降解率分别为96.4%、95.1%、94.3%和99.1%,出水CODCr为8.6～26.2mg/L,BOD5为5.2～17.2mg/L,NH3-N为1.8～3.9mg/L,浊度均小于1NTU,水质优于生活污水排放标准(GB 18918-2002)和农田灌溉水质标准(GB 5084-2005)。

In Shiyan, Hubei Province of middle route project of South-North water transfer, the Membrane bioreactor （MBR） and Advanced oxidation disinection（AOP） is applied to the treatment of rural domestic sewage. The degradation efficiencies of CODcr, BOD5, NH3- N and turbidity in the combined process are investigated. The results show that the combined process may achieve bet- ter degradation efficiencies of COD_Cr, BOS5, NH3-N and turbidity when water temperature is above 20 ℃ and pH is between 6 and 8. The degradation efficiencies of COD_cr, BOD5, NH3-N and turbidity in the combined process are more than 96. 4G, 95. 1G, 94.3%and 99.1% respectively. The effluent CODcr is about 8.6-26.2 mg/L, BOD3 is about 5.2-17.2 mg/L and NH3-N is about 1.8-3.9 mg/L, turbidity is less than 1 NTU. The water quality meets the standard for domestic sewage discharge （GB 18918 -2002） and standards for irrigation water quality （GB 5084-2005）.