Document Detail

Comparison of fouling characteristics of two different poly-vinylidene fluoride microfiltration membranes in a pilot-scale drinking water treatment system using pre-coagulation/sedimentation, sand filtration, and chlorination.
MedLine Citation:
PMID:  18242659     Owner:  NLM     Status:  MEDLINE    
Two pilot-scale hybrid water treatment systems using two different poly-vinylidene fluoride (PVDF) microfiltration (MF) membranes (i.e. symmetric and composite) were operated at a constant permeate flux of 104.2l m(-2)h(-1) (=2.5 md(-1)) with a pre-coagulation/sedimentation, sand filtration (SF), and chlorination to produce potable water from surface water. Turbidity was removed completely. And humic substances, Al, and Fe were removed very well by the pilot-scale membrane system. To control microbial growth and mitigate membrane fouling, a NaOCl solution was injected into the effluent from SF before reaching the two membranes (pre-chlorination). However, it adversely affected membrane fouling due to the oxidization and adsorption of inorganic substances such as Al, Fe, and Mn. In the next run, the NaOCl was introduced during backwash (post-chlorination). As compared with the result of pre-chlorination, this change increased the operating period of the symmetric and the composite membranes from about 10 and 50 days to about 60 and 200 days, respectively.
So-Ryong Chae; Hiroshi Yamamura; Keiichi Ikeda; Yoshimasa Watanabe
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2007-12-23
Journal Detail:
Title:  Water research     Volume:  42     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-04-18     Completed Date:  2008-08-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  2029-42     Citation Subset:  IM    
Department of Civil and Environmental Engineering, School of Engineering, Duke University, Durham, NC 27708, USA.
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MeSH Terms
Chlorine / chemistry*
Filtration / instrumentation,  methods*
Membranes, Artificial*
Pilot Projects
Polyvinyls / chemistry*
Water Supply / analysis*
Reg. No./Substance:
0/Membranes, Artificial; 0/Polyvinyls; 24937-79-9/polyvinylidene fluoride; 7782-50-5/Chlorine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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