Model-based evaluation on simultaneous nitrate and arsenite removal in a membrane biofilm reactor

Chen, X; Ni, BJ

Model-based evaluation on simultaneous nitrate and arsenite removal in a membrane biofilm reactor

Chen, X Ni, BJ

Permalink

Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Chemical Engineering Science, 2016, 152, pp. 488-496
Issue Date:: 2016-10-02

Closed Access

	Filename	Description	Size
	UQ396011_OA.pdf	Published version	938.29 kB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Chen, X
dc.contributor.author	Ni, BJ
dc.date.accessioned	2022-07-19T23:07:28Z
dc.date.available	2022-07-19T23:07:28Z
dc.date.issued	2016-10-02
dc.identifier.citation	Chemical Engineering Science, 2016, 152, pp. 488-496
dc.identifier.issn	0009-2509
dc.identifier.issn	1873-4405
dc.identifier.uri	http://hdl.handle.net/10453/159044
dc.description.abstract	Nitrate (NO3-) and arsenite (As(III)) are two major contaminants in groundwater, which could cause significant risks to human wellbeing and ecological system. In this work, a single-stage membrane biofilm reactor (MBfR) coupling denitrifying anaerobic methane (CH4) oxidation (DAMO) and autotrophic As(III) oxidation processes was proposed for the first time to achieve the in-situ or ex-situ simultaneous removal of NO3- and As(III) from groundwater. CH4 is supplied to the MBfR through gas-permeable membranes while NO3- and As(III) are provided in the bulk liquid. A mathematical model was developed by integrating the well-established biokinetics of DAMO microorganisms with the kinetics of As(III)-oxidizing bacteria (AsOB). The key parameter values of AsOB were specifically estimated using the batch experimental data of an enriched pure AsOB culture in conjunction with thermodynamic state calculations. The maximum specific growth rate of AsOB (μAsOB) and the yield coefficient for AsOB (YAsOB) were determined to be 0.00161 h-1 and 0.016 g COD g-1 As, respectively. The modeling results demonstrated that both influent surface loading (or hydraulic retention time (HRT)) and CH4 surface loading played important roles in controlling the steady-state microbial community structure and thus significantly affected the system performance. The As(III)/NO3- ratio between 0.1 and 2 g As g-1 NO3--N in the influent would have no significant impact on the overall system performance despite the varying microbial composition in the biofilm. Through properly adjusting the influent surface loading (or HRT) and CH4 surface loading whilst maintaining a sufficient biofilm thickness at a suitable influent As(III)/NO3- ratio, the maximum removal efficiencies of total nitrogen and As(III) could both reach above 95.0%, accompanied by a high CH4 utilization efficiency of up to 99.0%.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation	http://purl.org/au-research/grants/arc/DE130100451
dc.relation	http://purl.org/au-research/grants/arc/DP130103147
dc.relation.ispartof	Chemical Engineering Science
dc.relation.isbasedon	10.1016/j.ces.2016.06.049
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0913 Mechanical Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	Chemical Engineering
dc.title	Model-based evaluation on simultaneous nitrate and arsenite removal in a membrane biofilm reactor
dc.type	Journal Article
utslib.citation.volume	152
utslib.for	0904 Chemical Engineering
utslib.for	0913 Mechanical Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
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	2022-07-19T23:07:26Z
pubs.publication-status	Published
pubs.volume	152

Abstract:

Nitrate (NO3-) and arsenite (As(III)) are two major contaminants in groundwater, which could cause significant risks to human wellbeing and ecological system. In this work, a single-stage membrane biofilm reactor (MBfR) coupling denitrifying anaerobic methane (CH4) oxidation (DAMO) and autotrophic As(III) oxidation processes was proposed for the first time to achieve the in-situ or ex-situ simultaneous removal of NO3- and As(III) from groundwater. CH4 is supplied to the MBfR through gas-permeable membranes while NO3- and As(III) are provided in the bulk liquid. A mathematical model was developed by integrating the well-established biokinetics of DAMO microorganisms with the kinetics of As(III)-oxidizing bacteria (AsOB). The key parameter values of AsOB were specifically estimated using the batch experimental data of an enriched pure AsOB culture in conjunction with thermodynamic state calculations. The maximum specific growth rate of AsOB (μAsOB) and the yield coefficient for AsOB (YAsOB) were determined to be 0.00161 h-1 and 0.016 g COD g-1 As, respectively. The modeling results demonstrated that both influent surface loading (or hydraulic retention time (HRT)) and CH4 surface loading played important roles in controlling the steady-state microbial community structure and thus significantly affected the system performance. The As(III)/NO3- ratio between 0.1 and 2 g As g-1 NO3--N in the influent would have no significant impact on the overall system performance despite the varying microbial composition in the biofilm. Through properly adjusting the influent surface loading (or HRT) and CH4 surface loading whilst maintaining a sufficient biofilm thickness at a suitable influent As(III)/NO3- ratio, the maximum removal efficiencies of total nitrogen and As(III) could both reach above 95.0%, accompanied by a high CH4 utilization efficiency of up to 99.0%.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/159044