Enhancing post aerobic digestion of full-scale anaerobically digested sludge using free nitrous acid pretreatment.

Wang, Q; Zhou, X; Peng, L; Wang, D; Xie, G-J; Yuan, Z

Enhancing post aerobic digestion of full-scale anaerobically digested sludge using free nitrous acid pretreatment.

Wang, Q

Zhou, X Peng, L Wang, D Xie, G-J Yuan, Z

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Chemosphere, 2016, 150, pp. 152-158
Issue Date:: 2016-05

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Field	Value	Language
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.contributor.author	Zhou, X
dc.contributor.author	Peng, L
dc.contributor.author	Wang, D
dc.contributor.author	Xie, G-J
dc.contributor.author	Yuan, Z
dc.date.accessioned	2022-08-02T22:52:13Z
dc.date.available	2016-02-08
dc.date.available	2022-08-02T22:52:13Z
dc.date.issued	2016-05
dc.identifier.citation	Chemosphere, 2016, 150, pp. 152-158
dc.identifier.issn	0045-6535
dc.identifier.issn	1879-1298
dc.identifier.uri	http://hdl.handle.net/10453/159514
dc.description.abstract	Post aerobic digestion of anaerobically digested sludge (ADS) has been extensively applied to the wastewater treatment plants to enhance sludge reduction. However, the degradation of ADS in the post aerobic digester itself is still limited. In this work, an innovative free nitrous acid (HNO2 or FNA)-based pretreatment approach is proposed to improve full-scale ADS degradation in post aerobic digester. The post aerobic digestion was conducted by using an activated sludge to aerobically digest ADS for 4 days. Degradations of the FNA-treated (treated at 1.0 and 2.0 mg N/L for 24 h) and untreated ADSs were then determined and compared. The ADS was degraded by 26% and 32%, respectively, in the 4-day post aerobic digestion period while being pretreated at 1.0 and 2.0 mg HNO2-N/L. In comparison, only 20% of the untreated ADS was degraded. Economic analysis demonstrated that the implementation of FNA pretreatment can be economically favourable or not depending on the sludge transport and disposal cost.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation	http://purl.org/au-research/grants/arc/DE160100667
dc.relation.ispartof	Chemosphere
dc.relation.isbasedon	10.1016/j.chemosphere.2016.02.035
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.mesh	Aerobiosis
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Australia
dc.subject.mesh	Bioreactors
dc.subject.mesh	Costs and Cost Analysis
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Water
dc.subject.mesh	Water Purification
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Bioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Water Purification
dc.subject.mesh	Aerobiosis
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Costs and Cost Analysis
dc.subject.mesh	Australia
dc.subject.mesh	Waste Water
dc.title	Enhancing post aerobic digestion of full-scale anaerobically digested sludge using free nitrous acid pretreatment.
dc.type	Journal Article
utslib.citation.volume	150
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	2022-08-02T22:52:12Z
pubs.publication-status	Published
pubs.volume	150

Abstract:

Post aerobic digestion of anaerobically digested sludge (ADS) has been extensively applied to the wastewater treatment plants to enhance sludge reduction. However, the degradation of ADS in the post aerobic digester itself is still limited. In this work, an innovative free nitrous acid (HNO2 or FNA)-based pretreatment approach is proposed to improve full-scale ADS degradation in post aerobic digester. The post aerobic digestion was conducted by using an activated sludge to aerobically digest ADS for 4 days. Degradations of the FNA-treated (treated at 1.0 and 2.0 mg N/L for 24 h) and untreated ADSs were then determined and compared. The ADS was degraded by 26% and 32%, respectively, in the 4-day post aerobic digestion period while being pretreated at 1.0 and 2.0 mg HNO2-N/L. In comparison, only 20% of the untreated ADS was degraded. Economic analysis demonstrated that the implementation of FNA pretreatment can be economically favourable or not depending on the sludge transport and disposal cost.

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http://hdl.handle.net/10453/159514