Process design of a treatment system to reduce conductivity and ammoniacal nitrogen content of landfill leachate

Scott, M; Millar, GJ; Altaee, A

Process design of a treatment system to reduce conductivity and ammoniacal nitrogen content of landfill leachate

Scott, M Millar, GJ Altaee, A

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Publication Type:: Journal Article
Citation:: Journal of Water Process Engineering, 2019, 31
Issue Date:: 2019-10-01

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Field	Value	Language
dc.contributor.author	Scott, M	en_US
dc.contributor.author	Millar, GJ	en_US
dc.contributor.author	Altaee, A https://orcid.org/0000-0001-9764-3974	en_US
dc.date.issued	2019-10-01	en_US
dc.identifier.citation	Journal of Water Process Engineering, 2019, 31	en_US
dc.identifier.issn	2214-7144	en_US
dc.identifier.uri	http://hdl.handle.net/10453/133387
dc.description.abstract	© 2019 Elsevier Ltd An innovative combination of computational modelling and laboratory testing was applied to address the challenge of reducing conductivity and ammoniacal nitrogen in landfill leachate. The hypothesis was that accelerated selection of an appropriate treatment process could be achieved by application of new water process engineering software termed AqMB. Several scenarios were investigated incorporating settling ponds, clarifiers, lime softening, ion exchange, pH adjustment and degassing unit operations. Settling ponds reduced the lime demand if a lime softening process was tested, albeit ponds involved greater expense and needed space. Alternately, a clarifier using aluminium chlorohydrate removed suspended solids. Use of a single cation resin bed in series with a strong base anion (SBA) resin column was not able to meet regulatory targets. However, employment of a weak acid cation (WAC) and strong acid cation (SAC) resin combination achieved very low ammoniacal nitrogen levels. To satisfy conductivity limits both a degassing unit and a strong base anion (SBA) resin were also necessary. Bench top testing of actual leachate confirmed that the software predicted the trends in water quality. Final solution conductivity of ca. 250 μS/cm and ammoniacal nitrogen content of <1 mg/l were recorded which were compliant with target values of <1600 μS/cm and <100 mg/l ammoniacal nitrogen. Process economics encompassing power, chemicals, and resin costs were calculated to be A$10.50 per kL leachate.	en_US
dc.relation.ispartof	Journal of Water Process Engineering	en_US
dc.relation.isbasedon	10.1016/j.jwpe.2019.100806	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.title	Process design of a treatment system to reduce conductivity and ammoniacal nitrogen content of landfill leachate	en_US
dc.type	Journal Article
utslib.citation.volume	31	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0907 Environmental Engineering	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	*
utslib.copyright.embargo	2021-10-01T00:00:00+1000
pubs.publication-status	Published	en_US
pubs.volume	31	en_US

Abstract:

© 2019 Elsevier Ltd An innovative combination of computational modelling and laboratory testing was applied to address the challenge of reducing conductivity and ammoniacal nitrogen in landfill leachate. The hypothesis was that accelerated selection of an appropriate treatment process could be achieved by application of new water process engineering software termed AqMB. Several scenarios were investigated incorporating settling ponds, clarifiers, lime softening, ion exchange, pH adjustment and degassing unit operations. Settling ponds reduced the lime demand if a lime softening process was tested, albeit ponds involved greater expense and needed space. Alternately, a clarifier using aluminium chlorohydrate removed suspended solids. Use of a single cation resin bed in series with a strong base anion (SBA) resin column was not able to meet regulatory targets. However, employment of a weak acid cation (WAC) and strong acid cation (SAC) resin combination achieved very low ammoniacal nitrogen levels. To satisfy conductivity limits both a degassing unit and a strong base anion (SBA) resin were also necessary. Bench top testing of actual leachate confirmed that the software predicted the trends in water quality. Final solution conductivity of ca. 250 μS/cm and ammoniacal nitrogen content of <1 mg/l were recorded which were compliant with target values of <1600 μS/cm and <100 mg/l ammoniacal nitrogen. Process economics encompassing power, chemicals, and resin costs were calculated to be A$10.50 per kL leachate.

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http://hdl.handle.net/10453/133387