Effects of hydraulic retention time and bioflocculant addition on membrane fouling in a sponge-submerged membrane bioreactor

Deng, L; Guo, W; Ngo, HH; Du, B; Wei, Q; Tran, NH; Nguyen, NC; Chen, SS; Li, J

Effects of hydraulic retention time and bioflocculant addition on membrane fouling in a sponge-submerged membrane bioreactor

Deng, L Guo, W

Ngo, HH

Du, B Wei, Q Tran, NH Nguyen, NC Chen, SS

Li, J

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Publication Type:: Journal Article
Citation:: Bioresource Technology, 2016, 210 pp. 11 - 17
Issue Date:: 2016-06-01

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Field	Value	Language
dc.contributor.author	Deng, L	en_US
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Du, B	en_US
dc.contributor.author	Wei, Q	en_US
dc.contributor.author	Tran, NH	en_US
dc.contributor.author	Nguyen, NC	en_US
dc.contributor.author	Chen, SS https://orcid.org/0000-0002-7006-4056	en_US
dc.contributor.author	Li, J	en_US
dc.date.available	2020-05-25T19:02:53Z
dc.date.issued	2016-06-01	en_US
dc.identifier.citation	Bioresource Technology, 2016, 210 pp. 11 - 17	en_US
dc.identifier.issn	0960-8524	en_US
dc.identifier.uri	http://hdl.handle.net/10453/51948
dc.description.abstract	© 2016 Elsevier Ltd. The characteristics of activated sludge and membrane fouling were evaluated in a sponge-submerged membrane bioreactor (SSMBR) at different hydraulic retention times (HRTs) (6.67, 5.33 and 4.00 h). At shorter HRT, more obvious membrane fouling was caused by exacerbated cake layer formation and aggravated pore blocking. Activated sludge possessed more extracellular polymeric substances (EPS) due to excessive growth of biomass and lower protein to polysaccharide ratio in soluble microbial products (SMP). The cake layer resistance was aggravated by increased sludge viscosity together with the accumulated EPS and biopolymer clusters (BPC) on membrane surface. However, SMP showed marginal effect on membrane fouling when SSMBRs were operated at all HRTs. The SSMBR with Gemfloc® addition at the optimum HRT of 6.67 h demonstrated superior sludge characteristics such as larger floc size, less SMP in mixed liquor with higher protein/polysaccharide ratio, less SMP and BPC in cake layer, thereby further preventing membrane fouling.	en_US
dc.relation.ispartof	Bioresource Technology	en_US
dc.relation.isbasedon	10.1016/j.biortech.2016.01.056	en_US
dc.subject.classification	Biotechnology	en_US
dc.subject.mesh	Animals	en_US
dc.subject.mesh	Porifera	en_US
dc.subject.mesh	Biopolymers	en_US
dc.subject.mesh	Polysaccharides	en_US
dc.subject.mesh	Membranes, Artificial	en_US
dc.subject.mesh	Bioreactors	en_US
dc.subject.mesh	Biomass	en_US
dc.subject.mesh	Sewage	en_US
dc.subject.mesh	Flocculation	en_US
dc.subject.mesh	Solubility	en_US
dc.subject.mesh	Viscosity	en_US
dc.subject.mesh	Volatilization	en_US
dc.subject.mesh	Pressure	en_US
dc.subject.mesh	Time Factors	en_US
dc.subject.mesh	Biofouling	en_US
dc.title	Effects of hydraulic retention time and bioflocculant addition on membrane fouling in a sponge-submerged membrane bioreactor	en_US
dc.type	Journal Article
utslib.citation.volume	210	en_US
utslib.for	090404 Membrane and Separation Technologies	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access
pubs.publication-status	Published	en_US
pubs.volume	210	en_US

Abstract:

© 2016 Elsevier Ltd. The characteristics of activated sludge and membrane fouling were evaluated in a sponge-submerged membrane bioreactor (SSMBR) at different hydraulic retention times (HRTs) (6.67, 5.33 and 4.00 h). At shorter HRT, more obvious membrane fouling was caused by exacerbated cake layer formation and aggravated pore blocking. Activated sludge possessed more extracellular polymeric substances (EPS) due to excessive growth of biomass and lower protein to polysaccharide ratio in soluble microbial products (SMP). The cake layer resistance was aggravated by increased sludge viscosity together with the accumulated EPS and biopolymer clusters (BPC) on membrane surface. However, SMP showed marginal effect on membrane fouling when SSMBRs were operated at all HRTs. The SSMBR with Gemfloc® addition at the optimum HRT of 6.67 h demonstrated superior sludge characteristics such as larger floc size, less SMP in mixed liquor with higher protein/polysaccharide ratio, less SMP and BPC in cake layer, thereby further preventing membrane fouling.

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http://hdl.handle.net/10453/51948