UASB-接触氧化-絮凝沉淀工艺处理低浓度生活污水小试研究

Study on Treatment of Low Concentration Domestic Wastewater by Process of UASB-Contact Oxidation-Flocculation Technology

采用UASB -接触氧化 -絮凝沉淀工艺处理低浓度生活污水的实验研究表明 ,在生物段总水力停留时间为 5 .8h ,其中UASB段 3.8h ,接触氧化段 2 .0h ,进水COD为 10 0～ 30 0mg·L-1时 ,平均CODCr和BOD5去除率分别可达 83.4 %和 92 .7%。系统耐冲击负荷能力强 ,剩余污泥产量极少 ,平均出水CODCr为 2 0 .1mg·L-1,平均BOD5为 3.2mg·L-1,浊度≤ 8NTU ,水质透明 ,无味 ,如果再加以深度处理 ,可以回用。

Low concentration sewage wastewater was treated by UASB-contact oxidation-flocculation technology, the results showed that when the hydraulic retention time of the biologic stage were 5.8?h(3.8?h in UASB and 2.0?h in contact oxidation), and the influent COD was 100～300?mg·L -1 , the average removal rates of COD_ Cr and BOD reached 83.5% and 93.13% respectively. Tolerable shock load range of the system was wide.The excess sludge production was low.Tthe average effluent COD_ Cr was 20.0?mg·L -1 , and the BOD_5 was 3.0?mg·L -1 ,The degree of turbidness was below 8NTU.The final effluent was clear without smell,and could be reused.