摘要
超滤及其组合工艺 ,混凝 UF和粉末活性炭 (PAC) UF对污水深度处理的试验结果表明 ,超滤对水中浊度几乎可以完全去除 ,对细菌和大肠杆菌的去除效率大于 99% ,对水中有机物、氨氮、总铁和总锰也均有一定的去除。超滤前加混凝预处理或粉末活性炭吸附后 ,提高了水中有机物的去除率 ,同时减轻了膜污染 ,提高了膜通量和产水量。此外 ,三种工艺在等量冲洗用水的条件下 ,适当缩短过滤周期 ,增加反冲洗频率均提高了单位能耗产水量。
Experiments of treating the effluent from a sewage secondary treatment plant by UF and UF plus coagulation or powdered activated carbon (PAC) were carried out. The results show UF removes turbidity completely, more than 99% bacteria and E coli and a certain amount of organic matters, ammonia nitrogen and manganese. Hybrid processes featuring UF preceded by coagulation or PAC enhance the removal of organics, and moreover, reduce UF membrane fouling, improving flux of membrane. According to the experimental study, it is concluded that a shortened filtration period and increased backwash frequency result in higher water yield per unit energy consumption with same amount of backwash water.
出处
《环境科学与技术》
CAS
CSCD
2002年第2期14-16,共3页
Environmental Science & Technology
关键词
混凝
超滤
粉末活性炭
膜污染
产水量
UF
coagulation
powdered activated carbon
membrane fouling
water yield
