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.
出处
《环境科学》
EI
CAS
CSCD
北大核心
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)
关键词
动态膜
膜过滤
生物反应器
城市污水
污水处理
dynamic membrane
membrane filtration
membrane bioreactor
urban wastewater.
