Combined free nitrous acid and hydrogen peroxide pre-treatment of waste activated sludge enhances methane production via organic molecule breakdown.

Zhang, T; Wang, Q; Ye, L; Batstone, D; Yuan, Z

Combined free nitrous acid and hydrogen peroxide pre-treatment of waste activated sludge enhances methane production via organic molecule breakdown.

Zhang, T Wang, Q

Ye, L Batstone, D Yuan, Z

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Publisher:: NATURE PORTFOLIO
Publication Type:: Journal Article
Citation:: Sci Rep, 2015, 5, (1), pp. 16631
Issue Date:: 2015-11-13

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Field	Value	Language
dc.contributor.author	Zhang, T
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.contributor.author	Ye, L
dc.contributor.author	Batstone, D
dc.contributor.author	Yuan, Z
dc.date.accessioned	2024-03-12T14:26:56Z
dc.date.available	2015-10-16
dc.date.available	2024-03-12T14:26:56Z
dc.date.issued	2015-11-13
dc.identifier.citation	Sci Rep, 2015, 5, (1), pp. 16631
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/176594
dc.description.abstract	This study presents a novel pre-treatment strategy using combined free nitrous acid (FNA i.e. HNO2) and hydrogen peroxide (H2O2) to enhance methane production from WAS, with the mechanisms investigated bio-molecularly. WAS from a full-scale plant was treated with FNA alone (1.54 mg N/L), H2O2 alone (10-80 mg/g TS), and their combinations followed by biochemical methane potential tests. Combined FNA and H2O2 pre-treatment substantially enhanced methane potential of WAS by 59-83%, compared to 13-23% and 56% with H2O2 pre-treatment alone and FNA pre-treatment alone respectively. Model-based analysis indicated the increased methane potential was mainly associated with up to 163% increase in rapidly biodegradable fraction with combined pre-treatment. The molecular weight distribution and chemical structure analyses revealed the breakdown of soluble macromolecules with the combined pre-treatment caused by the deamination and oxidation of the typical functional groups in proteins, polysaccharides and phosphodiesters. These changes likely improved the biodegradability of WAS.
dc.format	Electronic
dc.language	eng
dc.publisher	NATURE PORTFOLIO
dc.relation.ispartof	Sci Rep
dc.relation.isbasedon	10.1038/srep16631
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.mesh	Biodegradation, Environmental
dc.subject.mesh	Bioreactors
dc.subject.mesh	Hydrogen Peroxide
dc.subject.mesh	Methane
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Water Purification
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Hydrogen Peroxide
dc.subject.mesh	Methane
dc.subject.mesh	Bioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Water Purification
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Biodegradation, Environmental
dc.subject.mesh	Biodegradation, Environmental
dc.subject.mesh	Bioreactors
dc.subject.mesh	Hydrogen Peroxide
dc.subject.mesh	Methane
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Water Purification
dc.title	Combined free nitrous acid and hydrogen peroxide pre-treatment of waste activated sludge enhances methane production via organic molecule breakdown.
dc.type	Journal Article
utslib.citation.volume	5
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	open_access	*
dc.date.updated	2024-03-12T14:26:53Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	5
utslib.citation.issue	1

Abstract:

This study presents a novel pre-treatment strategy using combined free nitrous acid (FNA i.e. HNO2) and hydrogen peroxide (H2O2) to enhance methane production from WAS, with the mechanisms investigated bio-molecularly. WAS from a full-scale plant was treated with FNA alone (1.54 mg N/L), H2O2 alone (10-80 mg/g TS), and their combinations followed by biochemical methane potential tests. Combined FNA and H2O2 pre-treatment substantially enhanced methane potential of WAS by 59-83%, compared to 13-23% and 56% with H2O2 pre-treatment alone and FNA pre-treatment alone respectively. Model-based analysis indicated the increased methane potential was mainly associated with up to 163% increase in rapidly biodegradable fraction with combined pre-treatment. The molecular weight distribution and chemical structure analyses revealed the breakdown of soluble macromolecules with the combined pre-treatment caused by the deamination and oxidation of the typical functional groups in proteins, polysaccharides and phosphodiesters. These changes likely improved the biodegradability of WAS.

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http://hdl.handle.net/10453/176594