摘要
采用膜生物反应器(MBR)和传统活性污泥法(CAS)两种工艺处理相同水质的市政污水,考察了两种工艺运行状况和污泥混合液的特性。结果表明,MBR可以达到非常好的COD、BOD和NH4+-N的去除效果,去除率高于CAS;MBR比CAS具有更高的污泥浓度,较低的污泥产率,较差的污泥沉降性能,同时两者的粘度与污泥浓度关系可以用不同的方程来表达;在运行天数为50～161d期间,M BR系统中没有发现可溶性微生物产物(SMP)明显的积累现象,在SMP中分子量大于14000的总有机碳(TOC)含量占总量的49.6%,CAS系统中相应值为22.5%;两种工艺的污泥耗氧速率均随系统运行呈下降趋势,并且MBR中的污泥耗氧速率大于CAS中的相应值;另外两种工艺中微型动物在种类和数量上表现出了不同的变化规律。
A submerged-flat membrane bioreactor and a conventional activated sludge process were used for municipal wastewater treatment, and the characteristics of sludge liquor were investigated. It was found that satisfactory chemical oxygen demand（COD）, biological oxygen demand（BOD） and ammonia nitrogen （NH^-N） removal efficiencies were achieved in MBR, demonstrating a more stable and excellent effluent quality than CAS. Sludge concentration, sludge production and sedimentation in MBR were more different than those in CAS, meanwhile, the relations between sludge viscosity and sludge concentration in two processes can be expressed by different equation. The accumulation of soluble microbial products（SMP） had not been observed in supernatant of MBR during 50~ 161 d experimental period, and SMP with a molecular weight（MW）〉 140 000 in supernatant accounted for 49.6% as contrasted to 22.5% in CAS. Experiments showed that oxygen uptake rate（OUR） of two systems decreased with an increases of the operation time, and OUR of MBR was higher than that of CAS. The microfauna in two systems were different from each other in their species and population.
出处
《水处理技术》
CAS
CSCD
北大核心
2006年第11期45-49,共5页
Technology of Water Treatment
基金
上海市科技发展基金支持项目(022312119)
关键词
膜生物反应器
传统活性污泥工艺
污泥混合液特征
membrane bioreactor
conventional activated sludge process
sludge characteristics
