Environmental Science & Technology

Investigation into a New Integrated Water Purification Process of Half Coagulation/Ozonation/Ceramic Membrane Filtration

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  • 1.Research Center for Environmental Engineering and Management,Graduate School at Shenzhen,Tsinghua University,Shenzhen 518055,Guangdong,China; 2.Dongjiang Shuiwu Co.,Ltd.,Dongguan 523000,Guangdong,China;3.Meidensha Corporation,Tokyo 141- 8616,Japan
范小江(1985-),男,博士生,主要从事膜法饮用水处理研究.

Received date: 2013-11-14

  Revised date: 2014-02-25

  Online published: 2014-04-01

Supported by

国家水体污染控制与治理科技重大专项(2008ZX07423, 2009ZX07423-001);广东省水利科技创新项目(2011-27)

Abstract

In order to control the membrane fouling caused by the half coagulation/ozonation/ceramic membranefiltration of micro- polluted water and investigate the removal capability of this process for pollutants,a bench- scaletest was carried out,and the effects of coagulant dosage and ozone dosage on trans- membrane pressure and effluentquality were explored. The results show that (1) membrane fouling can be alleviated significantly by half coagula-tion and ozonation,for instance,the trans- membrane pressure decreases rapidly from the original -0.074 MPa to-0.021 MPa at a PAC (Polyaluminum Chloride) dosage of 12.5 mg/L and decreases from - 0.068 MPa to-0.049MPa as the O3 dosage increases from 0mg/L to 2mg/L; (2) the organic matter in water can be removedefficiently by the integrated process; for instance,the molecular mass distribution range of the organic matter chan-ges from less than 5 ku to less than 3 ku,which means a transformation of part of organic matter from large molecu-lar mass to a smaller one; (3) the integrated process helps achieve 60.00% and 68.00% of CODMn and UV254 re-movals as well as 57.59% and 48.39% of THMFP and HAAFP removals,respectively; (4) after the integratedprocess, the effluent turbidity decreases to less than 0.05NTU,the number of particles larger than 2μm decreasesto less than or equal to 10CNT/mL,and the bacteria and coliform groups in water are entirely removed.Thus,themicrobial safety of the effluent is successfully guaranteed.

Cite this article

Fan Xiao- jiang Lei Ying Zhang Xi- hui Chao Meng Hiroshi Noguchi . Investigation into a New Integrated Water Purification Process of Half Coagulation/Ozonation/Ceramic Membrane Filtration[J]. Journal of South China University of Technology(Natural Science), 2014 , 42(5) : 54 -59 . DOI: 10.3969/j.issn.1000-565X.2014.05.009

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