摘要
采用平板式膜生物反应器(MBR)工艺处理城市污水处理厂的出水,考察投加粉末活性炭(PAC)对处理效果、膜污染和污泥特性的影响.结果表明,系统在很低的有机负荷(MLSS可承受的TOC负荷为0.014 kg/(kg.d))下有机物去除率大于60%,NH4+-N去除率大于95%,浊度去除率约为92%,可维持30 d左右.平行实验显示,投加PAC极大地提高了系统对有机物的去除率,而对NH4+-N和浊度的去除无显著影响;投加PAC能有效减缓膜生物反应器中的膜污染,使膜污染缓慢发展阶段的历时时间延长了一倍多,并使膜过滤污泥的凝胶极化阻力和总阻力分别减小40.5%和17.4%;另外投加PAC改变了污泥特性,是使系统性能提高的主要原因.
A submerged-flat membrane bioreactor with powdered activated carbon （PAC） addition was used in secondary effluent treatment. The performance of this hybrid system, the effect of PAC on removal efficiency of pollutants, fouling of membrane and sludge characteristics were investigated. It is found that more than 60% TOC, 95% NH4^＋ - N and 98% turbidity in influent are removed under condition of a low TOC loading 0. 014 kg/（kg, d）. Parallel experiments show PAC increases organic removals significantly however has no visible influence on NH4^＋ - N and turbidity removals. Meanwhile, at constant flux, the TMP（trans-membrane pressure） increasing rate of the membrane bioreactor system can be delayed by powdered activated carbon addition. Quantitative calculations show the polarization layer resistance and the total resistance of membrane are decreased about 40.5 % and 17.4% respectively. Analyses were then made from various aspects such as sludge conformation, sludge viscosity and specific oxygen uptake rate to elucidate the major factors giving rise to performance of system.
出处
《上海理工大学学报》
EI
CAS
北大核心
2007年第2期154-159,共6页
Journal of University of Shanghai For Science and Technology
基金
上海市科技发展基金资助项目(022312119)
关键词
活性炭
膜生物反应器
膜污染
powdered activated carbon
membrane bioreactor
membrane fouling
