Powder Activated Carbon Pretreatment of a Microfiltration Membrane for the Treatment of Surface Water

Yali Song, Bingzhi Dong, Naiyun Gao and Xiaoyan Ma
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Yali Song: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Bingzhi Dong: College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Naiyun Gao: College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Xiaoyan Ma: College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310032, China

IJERPH, 2015, vol. 12, issue 9, 1-9

Abstract: This study focused on the effect of powder activated carbon (PAC) adsorption on microfiltration (MF) membrane performance. The results showed that PAC pretreatment offered high organic matter removal rates for both dissolved organic carbon (DOC) and ultraviolet absorbance at 254 nm (UV 254 ) during 10–200 mg/L PAC dosage. The removal efficiencies of organic matter by MF membrane filtration decreased with the increase of organic matter removal rate by PAC adsorption. PAC mainly removed organic matter of about 3 kDa molecular weight (MW). MF membrane maintained more than 5 kDa MW organic matter on the membrane after PAC adsorption. The results of membrane filtration indicated that PAC pretreatment slightly promoted membrane flux, regardless of PAC dosage. It seems that the organic matter fouling membrane was concentrated in more than 3 kDa MW. PAC removed markedly less than 3 kDa MW organic matter and had less effect on more than 3 kDa organic matter. Thus, PAC cannot reduce membrane fouling.

Keywords: surface water; PAC; microfiltration; membrane flux; organic matter (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2015
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