【摘要】 通过小试,研究了氧化沟膜生物反应器对城市污水的处理效果与运行特性.结果表明,在水力停留时间(HRT)为4h,曝气/停曝时间为90min/30min等试验条件下,氧化沟膜生物反应器对城市污水中的DOC,CODCr,NH4 N,T N和T P等的平均去除率分别达到75%,90%,95%,80%和50%;氧化沟膜生物反应器具有较强的抗冲击负荷能力,当进水CODCr由265mg/L增加到1000mg/L时,出水CODCr仍能维持在100mg/L以下;在停运30d后,这种膜生物反应器去除有机物的性能在2d内可恢复,去除氨氮的性能在8d内可恢复;在3种膜清洗方法中,化学清洗效果最好,水力清洗效果次之,曝气清洗效果最差.更多还原

【Abstract】 Through experiments, the effect and the operation characteristics of municipal sewage treatment with the oxidation ditch membrane bioreactor（MBR） were studied. Under experimental conditions with HRT for 4 hours, and aeration time and non-aeration time for 90 min/30 min, the average removal ratios of DOC, COD_Cr, NH₄-N, T-N and T-P with the oxidation ditch MBR were 75%,90%,95%,80% and 50%. The oxidation ditch MBR had a stronger resistance to impact load: when COD_Cr in the influent varied from 265　mg/L to 1　000　mg/L rapidly, COD_Cr in the effluent could be maintained below 100　mg/L. After the oxidation ditch MBR was out of operation for 30 days, its performance of organic matter removal could recover in 2 days, and that of NH₄-N removal in 8 days. Of the three methods of cleaning membrane fouling, the chemical cleaning was the best, the hydraulic cleaning was the second, and the air scouring was the worst.更多还原