Biosolids reduction by the oxic-settling-anoxic process: Impact of sludge interchange rate.

Semblante, GU; Hai, FI; Bustamante, H; Guevara, N; Price, WE; Nghiem, LD

Biosolids reduction by the oxic-settling-anoxic process: Impact of sludge interchange rate.

Semblante, GU Hai, FI Bustamante, H Guevara, N Price, WE Nghiem, LD

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Bioresour Technol, 2016, 210, pp. 167-173
Issue Date:: 2016-06

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Field	Value	Language
dc.contributor.author	Semblante, GU
dc.contributor.author	Hai, FI
dc.contributor.author	Bustamante, H
dc.contributor.author	Guevara, N
dc.contributor.author	Price, WE
dc.contributor.author	Nghiem, LD
dc.date.accessioned	2022-02-11T21:36:47Z
dc.date.available	2016-01-05
dc.date.available	2022-02-11T21:36:47Z
dc.date.issued	2016-06
dc.identifier.citation	Bioresour Technol, 2016, 210, pp. 167-173
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/154426
dc.description.abstract	The impact of sludge interchange rate (SIR) on sludge reduction by oxic-settling-anoxic (OSA) process was investigated. The sludge yield of an OSA system (a sequencing batch reactor, SBR, integrated with external anoxic reactors) was compared to that of a control (an SBR attached to a single-pass aerobic digester). SIR (%) is the percentage by volume of sludge returned from the external reactor into the main bioreactor of the OSA, and was varied from 0% to 22%. OSA achieved greater sludge reduction when fed with unsettled sewage (sCOD=113mg/L) rather than settled sewage (sCOD=60mg/L). The SIR of 11% resulted in the highest OSA performance. At the optimum SIR, higher volatile solids destruction and nitrification/denitrification (i.e., conversion of destroyed volatile solids into inert forms) were observed in the external anoxic and intermittently aerated (i.e., aerobic/anoxic) reactors, respectively. Denitrification in the aerobic/anoxic reactor was inefficient without SIR. Effluent quality and sludge settleability of the main SBR were unaffected by SIR.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Bioresour Technol
dc.relation.isbasedon	10.1016/j.biortech.2016.01.010
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Biotechnology
dc.subject.mesh	Aerobiosis
dc.subject.mesh	Ammonia
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Biodegradation, Environmental
dc.subject.mesh	Biological Oxygen Demand Analysis
dc.subject.mesh	Bioreactors
dc.subject.mesh	Nitrates
dc.subject.mesh	Nitrites
dc.subject.mesh	Oxidation-Reduction
dc.subject.mesh	Phosphates
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Waste Water
dc.subject.mesh	Nitrates
dc.subject.mesh	Nitrites
dc.subject.mesh	Phosphates
dc.subject.mesh	Ammonia
dc.subject.mesh	Bioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Aerobiosis
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Oxidation-Reduction
dc.subject.mesh	Biodegradation, Environmental
dc.subject.mesh	Biological Oxygen Demand Analysis
dc.subject.mesh	Waste Water
dc.title	Biosolids reduction by the oxic-settling-anoxic process: Impact of sludge interchange rate.
dc.type	Journal Article
utslib.citation.volume	210
utslib.location.activity	England
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	closed_access	*
dc.date.updated	2022-02-11T21:36:44Z
pubs.publication-status	Published
pubs.volume	210

Abstract:

The impact of sludge interchange rate (SIR) on sludge reduction by oxic-settling-anoxic (OSA) process was investigated. The sludge yield of an OSA system (a sequencing batch reactor, SBR, integrated with external anoxic reactors) was compared to that of a control (an SBR attached to a single-pass aerobic digester). SIR (%) is the percentage by volume of sludge returned from the external reactor into the main bioreactor of the OSA, and was varied from 0% to 22%. OSA achieved greater sludge reduction when fed with unsettled sewage (sCOD=113mg/L) rather than settled sewage (sCOD=60mg/L). The SIR of 11% resulted in the highest OSA performance. At the optimum SIR, higher volatile solids destruction and nitrification/denitrification (i.e., conversion of destroyed volatile solids into inert forms) were observed in the external anoxic and intermittently aerated (i.e., aerobic/anoxic) reactors, respectively. Denitrification in the aerobic/anoxic reactor was inefficient without SIR. Effluent quality and sludge settleability of the main SBR were unaffected by SIR.

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http://hdl.handle.net/10453/154426