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.
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), NH_4-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 NH_4-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.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第2期71-75,共5页
Journal of Hunan University:Natural Sciences
基金
湖南省自然科学基金资助项目(00JJY2057)
关键词
污水
氧化沟
膜生物反应器
膜污染
sewage
oxidation ditch
membrane bioreactor
membrane fouling
