[Effect of preozonation on microfiltration for Huangpu River].
This study investigated the effect of preozonation on organic matter and microfiltration membrane filtration, Huangpu River surface water ozonated was filtrated by MF membrane. The results show that highest rejection efficiency of DOC and UVr by ozone are 10% and 71% respectively during 0.5-3.0 mg/L ozone dosage. With increasing of ozone concentration, organic substances of 2 x 10(3)-7 x 10(3) reduce gradually, while organic matter of which less than 0.5 x 10(3) change slightly. Ozone oxidizes more hydrophobic fraction to hydrophilic one and only few to inorganic matter. Changes of organic matter composition affect membrane filtration resistance, thereby improve membrane flux. There is the optimal dosage with ozone of 1.5 mg/L made membrane flux maximum in the range of 0.5-3.0 mg/L ozone dosage. The reason is change of organic matter composition which made membrane filtration resistance minimum in the ozone dosage of 1.5 mg/L.
Song
Ya-Li
YL
School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. yali_song@sina.com
Dong
Bing-Zhi
BZ
Gao
Nai-Yun
NY
Ma
Xiao-Yan
XY
D002681:China; D004868:Equipment Failure; D005374:Filtration; D005618:Fresh Water / Q000032:analysis*; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000302:isolation & purification*; D010126:Ozone / Q000737:chemistry*; D045483:Rivers; D018508:Water Purification / Q000379:methods*
D008567:Membranes, Artificial; D009930:Organic Chemicals; D010126:Ozone