动态膜-生物反应器对城市污水的处理  

A Submerged Dynamic Membrane Bioreactor for Domestic Wastewater Treatment

作　　者：范彬[1] 黄霞[1] 文湘华[1] 于妍[2] 

机构地区：[1]清华大学环境科学与工程系环境模拟与污染控制国家重点联合实验室,北京100084 [2]中国矿业大学(北京校区)化学与环境工程系,北京100083

出　　处：《环境科学》2002年第6期51-56,共6页Environmental Science

基　　金：国家自然科学基金资助项目 (5 0 1780 39)

摘　　要：应用动态膜原理 ,以 0 1mm孔径的普通筛网代替固定膜材料构成一体式动态膜 生物反应器 (DMBR)处理实际城市污水 .HRT =3 5h时 ,出水水质良好 .DMBR在小于数cm的液位差下自流出水 ,出水中的SS最高检测值为 4 0 5mg/L ,但在多数情况下为 0 .在MLSS约 70 0 0～ 80 0 0mg/L下 ,当动态膜通量为 1 4 9L/(m2 ·h)时 ,出水水头仅为 5 8mm ;2 7d连续运行 ,出水水头没有明显改变 .动态膜对反应器上清液中的COD和TOC的平均去除率分别为 2 8 74%和 3 6 9% .当溶解氧浓度大于 2～ 3mg/L时 ,氨氮去除率大于 96% .The dynamic membrane forming on the surface of 0.1mm Dacron mesh was utilized instead of static membrane, e.g. hollow fiber membrane, to develop a submerged dynamic membrane bioreactor (DMBR). The DMBR had high quality effluents when treating domestic wastewater at HRT=3 5h. The dynamic membrane could work steadily at a pressure no more than several centimeters water head drop. The highest SS concentration in the effluents was 4 05mg/L, whereas the measured SS concentrations were zero in most circumstances. At condition of MLSS=7000～8000mg/L, the effluent head drop was only 5 8mm when flux=14 9L/(m 2·h), and it had little change during a continuous run for 27 days. The dynamic membrane averagely removed 28 74% of COD and 36 9% of TOC in the supernatant of the mixed liquor. The DMBR could remove NH 3 N more than 96% when DO in the mixed liquor was no less than 2～3mg/L.

关 键 词：动态膜 膜过滤 生物反应器 城市污水 污水处理 

分 类 号：X703[环境科学与工程—环境工程]