Towards energy positive wastewater treatment by sludge treatment using free nitrous acid.

Wang, Q; Hao, X; Yuan, Z

Towards energy positive wastewater treatment by sludge treatment using free nitrous acid.

Wang, Q

Hao, X Yuan, Z

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Chemosphere, 2016, 144, pp. 1869-1873
Issue Date:: 2016-02

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Field	Value	Language
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.contributor.author	Hao, X
dc.contributor.author	Yuan, Z
dc.date.accessioned	2022-08-03T03:40:21Z
dc.date.available	2015-10-16
dc.date.available	2022-08-03T03:40:21Z
dc.date.issued	2016-02
dc.identifier.citation	Chemosphere, 2016, 144, pp. 1869-1873
dc.identifier.issn	0045-6535
dc.identifier.issn	1879-1298
dc.identifier.uri	http://hdl.handle.net/10453/159539
dc.description.abstract	Free nitrous acid (FNA i.e. HNO2) was revealed to be effective in enhancing biodegradability of secondary sludge. Also, nitrite-oxidizing bacteria were found to be more susceptible to FNA than ammonium-oxidizing bacteria. Based on these findings, a novel FNA-based sludge treatment technology is proposed to enhance energy recovery from wastewater/sludge. Energy analysis indicated that the FNA-based technology would make wastewater treatment become an energy generating process (yielding energy at 4 kWh/PE/y; kWh/PE/y: kilowatt hours per population equivalent per year), rather than being a large energy consumer that it is today (consuming energy at 24 kWh/PE/y). Importantly, FNA required for the sludge treatment could be produced as a by-product of wastewater treatment. This proposed FNA-based technology is economically and environmentally attractive, and can be easily implemented in any wastewater treatment plants. It only involves the installation of a simple sludge mixing tank. This article presents the concept of the FNA-based technology.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Chemosphere
dc.relation.isbasedon	10.1016/j.chemosphere.2015.10.069
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.mesh	Bacteria
dc.subject.mesh	Biodegradation, Environmental
dc.subject.mesh	Bioreactors
dc.subject.mesh	Energy-Generating Resources
dc.subject.mesh	Nitrites
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Water
dc.subject.mesh	Water Purification
dc.subject.mesh	Bacteria
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Nitrites
dc.subject.mesh	Bioreactors
dc.subject.mesh	Energy-Generating Resources
dc.subject.mesh	Sewage
dc.subject.mesh	Water Purification
dc.subject.mesh	Biodegradation, Environmental
dc.subject.mesh	Waste Water
dc.title	Towards energy positive wastewater treatment by sludge treatment using free nitrous acid.
dc.type	Journal Article
utslib.citation.volume	144
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	2022-08-03T03:40:20Z
pubs.publication-status	Published
pubs.volume	144

Abstract:

Free nitrous acid (FNA i.e. HNO2) was revealed to be effective in enhancing biodegradability of secondary sludge. Also, nitrite-oxidizing bacteria were found to be more susceptible to FNA than ammonium-oxidizing bacteria. Based on these findings, a novel FNA-based sludge treatment technology is proposed to enhance energy recovery from wastewater/sludge. Energy analysis indicated that the FNA-based technology would make wastewater treatment become an energy generating process (yielding energy at 4 kWh/PE/y; kWh/PE/y: kilowatt hours per population equivalent per year), rather than being a large energy consumer that it is today (consuming energy at 24 kWh/PE/y). Importantly, FNA required for the sludge treatment could be produced as a by-product of wastewater treatment. This proposed FNA-based technology is economically and environmentally attractive, and can be easily implemented in any wastewater treatment plants. It only involves the installation of a simple sludge mixing tank. This article presents the concept of the FNA-based technology.

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http://hdl.handle.net/10453/159539