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Article: Membrane bioreactor for the drinking water treatment of polluted surface water supplies

TitleMembrane bioreactor for the drinking water treatment of polluted surface water supplies
Authors
Issue Date2003
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres
Citation
Water Research, 2003, v. 37 n. 19, p. 4781-4791 How to Cite?
AbstractA laboratory membrane bioreactor (MBR) using a submerged polyethylene hollow-fibre membrane module with a pore size of 0.4μm and a total surface area of 0.2m2 was used for treating a raw water supply slightly polluted by domestic sewage. The feeding influent had a total organic carbon (TOC) level of 3-5mg/L and an ammonia nitrogen (NH3-N) concentration of 3-4mg/L. The MBR ran continuously for more than 500 days, with a hydraulic retention time (HRT) as short as 1h or less. Sufficient organic degradation and complete nitrification were achieved in the MBR effluent, which normally had a TOC of less than 2mg/L and a NH3-N of lower than 0.2mg/L. The process was also highly effective for eliminating conventional water impurities, as demonstrated by decreases in turbidity from 4.50±1.11 to 0.08±0.03 NTU, in total coliforms from 105/mL to less than 5/mL and in UV254 absorbance from 0.098±0.019 to 0.036±0.007cm-1. With the MBR treatment, the 3-day trihalomethane formation potential (THMFP) was significantly reduced from 239.5±43.8 to 60.4±23.1μg/L. The initial chlorine demand for disinfection decreased from 22.3±5.1 to 0.5±0.1mg/L. The biostability of the effluent improved considerably as the assimilable organic carbon (AOC) decreased from 134.5±52.7 to 25.3±19.9μg/L. All of these water quality parameters show the superior quality of the MBR-treated water, which was comparable to or even better than the local tap water. Molecular size distribution analysis and the hydrophobic characterisation of the MBR effluent, in comparison to the filtered liquor from the bioreactor, suggest that the MBR had an enhanced filtration mechanism. A sludge layer on the membrane surface could have functioned as an additional barrier to the passage of typical THM precursors, such as large organic molecules and hydrophobic compounds. These results indicate that the MBR with a short HRT could be developed as an effective biological water treatment process to address the urgent need of many developing countries that are plagued by the serious contamination of surface water resources. © 2003 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/71538
ISSN
2015 Impact Factor: 5.991
2015 SCImago Journal Rankings: 2.772
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, XYen_HK
dc.contributor.authorChu, HPen_HK
dc.date.accessioned2010-09-06T06:32:54Z-
dc.date.available2010-09-06T06:32:54Z-
dc.date.issued2003en_HK
dc.identifier.citationWater Research, 2003, v. 37 n. 19, p. 4781-4791en_HK
dc.identifier.issn0043-1354en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71538-
dc.description.abstractA laboratory membrane bioreactor (MBR) using a submerged polyethylene hollow-fibre membrane module with a pore size of 0.4μm and a total surface area of 0.2m2 was used for treating a raw water supply slightly polluted by domestic sewage. The feeding influent had a total organic carbon (TOC) level of 3-5mg/L and an ammonia nitrogen (NH3-N) concentration of 3-4mg/L. The MBR ran continuously for more than 500 days, with a hydraulic retention time (HRT) as short as 1h or less. Sufficient organic degradation and complete nitrification were achieved in the MBR effluent, which normally had a TOC of less than 2mg/L and a NH3-N of lower than 0.2mg/L. The process was also highly effective for eliminating conventional water impurities, as demonstrated by decreases in turbidity from 4.50±1.11 to 0.08±0.03 NTU, in total coliforms from 105/mL to less than 5/mL and in UV254 absorbance from 0.098±0.019 to 0.036±0.007cm-1. With the MBR treatment, the 3-day trihalomethane formation potential (THMFP) was significantly reduced from 239.5±43.8 to 60.4±23.1μg/L. The initial chlorine demand for disinfection decreased from 22.3±5.1 to 0.5±0.1mg/L. The biostability of the effluent improved considerably as the assimilable organic carbon (AOC) decreased from 134.5±52.7 to 25.3±19.9μg/L. All of these water quality parameters show the superior quality of the MBR-treated water, which was comparable to or even better than the local tap water. Molecular size distribution analysis and the hydrophobic characterisation of the MBR effluent, in comparison to the filtered liquor from the bioreactor, suggest that the MBR had an enhanced filtration mechanism. A sludge layer on the membrane surface could have functioned as an additional barrier to the passage of typical THM precursors, such as large organic molecules and hydrophobic compounds. These results indicate that the MBR with a short HRT could be developed as an effective biological water treatment process to address the urgent need of many developing countries that are plagued by the serious contamination of surface water resources. © 2003 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watresen_HK
dc.relation.ispartofWater Researchen_HK
dc.subject.meshBioreactorsen_HK
dc.subject.meshDeveloping Countriesen_HK
dc.subject.meshEnterobacteriaceae - isolation & purificationen_HK
dc.subject.meshFiltrationen_HK
dc.subject.meshMembranes, Artificialen_HK
dc.subject.meshMolecular Weighten_HK
dc.subject.meshPolyethyleneen_HK
dc.subject.meshSewage - chemistry - microbiologyen_HK
dc.subject.meshTrihalomethanes - isolation & purificationen_HK
dc.subject.meshWaste Disposal, Fluid - methodsen_HK
dc.subject.meshWater Pollutants, Chemical - isolation & purificationen_HK
dc.subject.meshWater Purification - methodsen_HK
dc.titleMembrane bioreactor for the drinking water treatment of polluted surface water suppliesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0043-1354&volume=37&spage=4781&epage=4791&date=2003&atitle=Membrane+bioreactor+for+the+drinking+water+treatment+of+polluted+surface+water+suppliesen_HK
dc.identifier.emailLi, XY:xlia@hkucc.hku.hken_HK
dc.identifier.authorityLi, XY=rp00222en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0043-1354(03)00424-Xen_HK
dc.identifier.pmid14568065-
dc.identifier.scopuseid_2-s2.0-0142074826en_HK
dc.identifier.hkuros90827en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0142074826&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume37en_HK
dc.identifier.issue19en_HK
dc.identifier.spage4781en_HK
dc.identifier.epage4791en_HK
dc.identifier.isiWOS:000186247200026-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLi, XY=26642887900en_HK
dc.identifier.scopusauthoridChu, HP=36870373000en_HK

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