File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Biofouling in ultrafiltration process for drinking water treatment and its control by chlorinated-water and pure water backwashing

TitleBiofouling in ultrafiltration process for drinking water treatment and its control by chlorinated-water and pure water backwashing
Authors
KeywordsAmmonia
Backwashing
Biofouling
Drinking water treatment
Ultrafiltration
Issue Date2018
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenv
Citation
Science of the Total Environment, 2018, v. 644, p. 306-314 How to Cite?
AbstractWe investigated biofouling in ultrafiltration (UF) for drinking water treatment and its control by backwashing with chlorinated-water or pure water. By using sodium azide to suppress biological growth, the relative contribution of biofouling to total fouling was estimated, and its value (5.3–56.0%) varied with the feed water, and increased with the increases of filtration time and membrane flux. The biofouling layer could partially remove biodegradable organic matter and ammonia (32.9–74.2%). Backwashing using chlorinated-water partly inactivated the microorganisms (23.8%) but increased the content of extracellular polymeric substances (7.7%) in the biofouling layer. In contrast, backwashing using pure water led to a looser and more porous fouling layer according to optical coherence tomography observation. Consequently, the latter was more effective in reducing fouling resistance (33.41% reduction) compared to backwashing by chlorinated-water (8.6%). These findings reveal the critical roles of biofouling in pollutants removal in addition to membrane permeability, which has important implications for addressing seasonal ammonia pollution. © 2018
Persistent Identifierhttp://hdl.handle.net/10722/264576
ISSN
2017 Impact Factor: 4.61
2015 SCImago Journal Rankings: 1.702
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorShao, S-
dc.contributor.authorWang, Y-
dc.contributor.authorShi, D-
dc.contributor.authorZhang, X-
dc.contributor.authorTang, C-
dc.contributor.authorLiu, Z-
dc.contributor.authorLi, J-
dc.date.accessioned2018-10-22T07:57:15Z-
dc.date.available2018-10-22T07:57:15Z-
dc.date.issued2018-
dc.identifier.citationScience of the Total Environment, 2018, v. 644, p. 306-314-
dc.identifier.issn0048-9697-
dc.identifier.urihttp://hdl.handle.net/10722/264576-
dc.description.abstractWe investigated biofouling in ultrafiltration (UF) for drinking water treatment and its control by backwashing with chlorinated-water or pure water. By using sodium azide to suppress biological growth, the relative contribution of biofouling to total fouling was estimated, and its value (5.3–56.0%) varied with the feed water, and increased with the increases of filtration time and membrane flux. The biofouling layer could partially remove biodegradable organic matter and ammonia (32.9–74.2%). Backwashing using chlorinated-water partly inactivated the microorganisms (23.8%) but increased the content of extracellular polymeric substances (7.7%) in the biofouling layer. In contrast, backwashing using pure water led to a looser and more porous fouling layer according to optical coherence tomography observation. Consequently, the latter was more effective in reducing fouling resistance (33.41% reduction) compared to backwashing by chlorinated-water (8.6%). These findings reveal the critical roles of biofouling in pollutants removal in addition to membrane permeability, which has important implications for addressing seasonal ammonia pollution. © 2018-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenv-
dc.relation.ispartofScience of the Total Environment-
dc.subjectAmmonia-
dc.subjectBackwashing-
dc.subjectBiofouling-
dc.subjectDrinking water treatment-
dc.subjectUltrafiltration-
dc.titleBiofouling in ultrafiltration process for drinking water treatment and its control by chlorinated-water and pure water backwashing-
dc.typeArticle-
dc.identifier.emailShao, S: shaosl@hku.hk-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.scitotenv.2018.06.220-
dc.identifier.scopuseid_2-s2.0-85049436712-
dc.identifier.hkuros295705-
dc.identifier.volume644-
dc.identifier.spage306-
dc.identifier.epage314-
dc.identifier.isiWOS:000445164000031-
dc.publisher.placeNetherlands-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats