【作者】 林红军； 陆晓峰； 沈飞； 余江林；

【Author】 LIN Hongjun,LU Xiaofeng,SHEN Fei,YU Jianglin (Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China)

【机构】 中国科学院上海应用物理研究所；

【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征.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GAS;MBR相比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,同时两者的黏度与污泥浓度关系可用不同的方程来表达;在运行天数为50～161天期间,MBR系统中未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14 kD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.更多还原

【Abstract】 A submerged - flat membrane bioreactor and a conventional activated sludge process were used for municipal wastewater treatment,the characteristics of sludge liquor were investigated.It was found that satisfactory chemical oxygen demand（COD）,biological oxygen demand（BOD） and ammonia nitrogen（NH₄⁺- N） removal efficiencies were achieved in MBR,demonstrated a more stable and excellent effluent quality than CAS. sludge concentration,sludge production and sedimentation in MBR were more different from those in CAS, meanwhile,the relations between sludge viscosity and sludge concentration in two processes can be expressed by different equation.It was not observed the accumulation of soluble microbial products（SMP） 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%contrast to 22.5%in CAS.Experiments showed that oxygen uptake rate（OUR） of two systems decreased with an increase at the operation time,and OUR of MBR was higher than that of CAS.The microbiota in two systems were differed in microbiota species and population.更多还原