Critical flux and chemical cleaning-in-place during the long-term operation of a pilot-scale submerged membrane bioreactor for municipal wastewater treatment

Handle URI:
http://hdl.handle.net/10754/561586
Title:
Critical flux and chemical cleaning-in-place during the long-term operation of a pilot-scale submerged membrane bioreactor for municipal wastewater treatment
Authors:
Wei, Chunhai; Huang, Xia; Ben Aïm, Roger M.; Yamamoto, Kazuo; Amy, Gary L.
Abstract:
The critical flux and chemical cleaning-in-place (CIP) in a long-term operation of a pilot-scale submerged membrane bioreactor for municipal wastewater treatment were investigated. Steady filtration under high flux (30 L/(m2 h)) was successfully achieved due to effective membrane fouling control by sub-critical flux operation and chemical CIP with sodium hypochlorite (NaClO) in both trans-membrane pressure (TMP) controlling mode (cleaning with high concentration NaClO of 2000-3000 mg/L in terms of effective chorine was performed when TMP rose to 15 kPa) and time controlling mode (cleanings were performed weekly and monthly respectively with low concentration NaClO (500-1000 mg/L) and high concentration NaClO (3000 mg/L)). Microscopic analysis on membrane fibers before and after high concentration NaClO was also conducted. Images of scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed that NaClO CIP could effectively remove gel layer, the dominant fouling under sub-critical flux operation. Porosity measurements indicated that NaClO CIP could partially remove pore blockage fouling. The analyses from fourier transform infrared spectrometry (FTIR) with attenuated total reflectance accessory (ATR) and energy dispersive spectrometer (EDS) demonstrated that protein-like macromolecular organics and inorganics were the important components of the fouling layer. The analysis of effluent quality before and after NaClO CIP showed no obvious effect on effluent quality. © 2010 Elsevier Ltd.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Water Desalination and Reuse Research Center; Biological and Environmental Sciences and Engineering (BESE) Division
Publisher:
Elsevier
Journal:
Water Research
Issue Date:
Jan-2011
DOI:
10.1016/j.watres.2010.09.021
PubMed ID:
20947121
Type:
Article
ISSN:
00431354
Sponsors:
This work was supported by the National Science Fund for Distinguished Young Scholars (No. 50725827) and 863 program (No. 2009AA062901).
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorWei, Chunhaien
dc.contributor.authorHuang, Xiaen
dc.contributor.authorBen Aïm, Roger M.en
dc.contributor.authorYamamoto, Kazuoen
dc.contributor.authorAmy, Gary L.en
dc.date.accessioned2015-08-02T09:14:48Zen
dc.date.available2015-08-02T09:14:48Zen
dc.date.issued2011-01en
dc.identifier.issn00431354en
dc.identifier.pmid20947121en
dc.identifier.doi10.1016/j.watres.2010.09.021en
dc.identifier.urihttp://hdl.handle.net/10754/561586en
dc.description.abstractThe critical flux and chemical cleaning-in-place (CIP) in a long-term operation of a pilot-scale submerged membrane bioreactor for municipal wastewater treatment were investigated. Steady filtration under high flux (30 L/(m2 h)) was successfully achieved due to effective membrane fouling control by sub-critical flux operation and chemical CIP with sodium hypochlorite (NaClO) in both trans-membrane pressure (TMP) controlling mode (cleaning with high concentration NaClO of 2000-3000 mg/L in terms of effective chorine was performed when TMP rose to 15 kPa) and time controlling mode (cleanings were performed weekly and monthly respectively with low concentration NaClO (500-1000 mg/L) and high concentration NaClO (3000 mg/L)). Microscopic analysis on membrane fibers before and after high concentration NaClO was also conducted. Images of scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed that NaClO CIP could effectively remove gel layer, the dominant fouling under sub-critical flux operation. Porosity measurements indicated that NaClO CIP could partially remove pore blockage fouling. The analyses from fourier transform infrared spectrometry (FTIR) with attenuated total reflectance accessory (ATR) and energy dispersive spectrometer (EDS) demonstrated that protein-like macromolecular organics and inorganics were the important components of the fouling layer. The analysis of effluent quality before and after NaClO CIP showed no obvious effect on effluent quality. © 2010 Elsevier Ltd.en
dc.description.sponsorshipThis work was supported by the National Science Fund for Distinguished Young Scholars (No. 50725827) and 863 program (No. 2009AA062901).en
dc.publisherElsevieren
dc.subjectChemical cleaning-in-placeen
dc.subjectCritical fluxen
dc.subjectMembrane foulingen
dc.subjectMunicipal wastewateren
dc.subjectSubmerged membrane bioreactoren
dc.titleCritical flux and chemical cleaning-in-place during the long-term operation of a pilot-scale submerged membrane bioreactor for municipal wastewater treatmenten
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentWater Desalination and Reuse Research Centeren
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalWater Researchen
dc.contributor.institutionState Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, Chinaen
dc.contributor.institutionUniversité de Toulouseen
dc.contributor.institutionINSA, LISBP, 135 Avenue de Rangueil, F-31077 Toulouse, Franceen
dc.contributor.institutionEnvironmental Science Center, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113-0033, Japanen
kaust.authorWei, Chunhaien
kaust.authorAmy, Gary L.en
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