Effects of nitrate dosing on sulfidogenic and methanogenic activities in sewer sediment

Liu, Y; Sharma, KR; Ni, BJ; Fan, L; Murthy, S; Tyson, GQ; Yuan, Z

Effects of nitrate dosing on sulfidogenic and methanogenic activities in sewer sediment

Liu, Y

Sharma, KR Ni, BJ

Fan, L Murthy, S Tyson, GQ Yuan, Z

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Publication Type:: Journal Article
Citation:: Water Research, 2015, 74 pp. 155 - 165
Issue Date:: 2015-05-01

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Field	Value	Language
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961	en_US
dc.contributor.author	Sharma, KR	en_US
dc.contributor.author	Ni, BJ https://orcid.org/0000-0002-1129-7837	en_US
dc.contributor.author	Fan, L	en_US
dc.contributor.author	Murthy, S	en_US
dc.contributor.author	Tyson, GQ	en_US
dc.contributor.author	Yuan, Z	en_US
dc.date.available	2015-02-06	en_US
dc.date.issued	2015-05-01	en_US
dc.identifier.citation	Water Research, 2015, 74 pp. 155 - 165	en_US
dc.identifier.issn	0043-1354	en_US
dc.identifier.uri	http://hdl.handle.net/10453/119145
dc.description.abstract	© 2015 Elsevier Ltd. Nitrate dosing is widely used to control sulfide and methane formation in sewers. The impact of nitrate on sulfide and methane production by sewer biofilms in rising mains has been elucidated recently. However, little is known about the effect of nitrate on biologically active sewer sediment, which is substantially thicker than rising main biofilms (centimeters vs. hundreds of micrometers, respectively). In this study, we investigated the effect of nitrate addition to sewer sediment cultivated in lab-scale sewer sediment reactors. Batch test results showed that nitrate addition does not suppress sulfide production in sewer sediment, but it reduces sulfide accumulation through anoxic sulfide oxidation in the sediment and hence, also reduces sulfide accumulation in the bulk water. Microsensor measurement of sediment sulfide revealed the presence of sulfide oxidation and sulfide production zones with the interface dynamically regulated by the depth of nitrate penetration. In contrast, the methane production activity of sewer sediment was substantially reduced, likely due to the long-term inhibitory effects of nitrate on methanogens. Pore water measurements showed that methane production activity in the sediment zone with frequent nitrate exposure was completely suppressed, and consequently, the methane production zone re-established deeper in the sediment where nitrate penetration was infrequent.	en_US
dc.relation.ispartof	Water Research	en_US
dc.relation.isbasedon	10.1016/j.watres.2015.02.017	en_US
dc.subject.classification	Environmental Engineering	en_US
dc.subject.mesh	Nitrates	en_US
dc.subject.mesh	Sulfides	en_US
dc.subject.mesh	Methane	en_US
dc.subject.mesh	Air Pollution	en_US
dc.subject.mesh	Sewage	en_US
dc.subject.mesh	Waste Disposal, Fluid	en_US
dc.subject.mesh	Anaerobiosis	en_US
dc.subject.mesh	Oxidation-Reduction	en_US
dc.title	Effects of nitrate dosing on sulfidogenic and methanogenic activities in sewer sediment	en_US
dc.type	Journal Article
utslib.citation.volume	74	en_US
utslib.for	090404 Membrane and Separation Technologies	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	closed_access
pubs.publication-status	Published	en_US
pubs.volume	74	en_US

Abstract:

© 2015 Elsevier Ltd. Nitrate dosing is widely used to control sulfide and methane formation in sewers. The impact of nitrate on sulfide and methane production by sewer biofilms in rising mains has been elucidated recently. However, little is known about the effect of nitrate on biologically active sewer sediment, which is substantially thicker than rising main biofilms (centimeters vs. hundreds of micrometers, respectively). In this study, we investigated the effect of nitrate addition to sewer sediment cultivated in lab-scale sewer sediment reactors. Batch test results showed that nitrate addition does not suppress sulfide production in sewer sediment, but it reduces sulfide accumulation through anoxic sulfide oxidation in the sediment and hence, also reduces sulfide accumulation in the bulk water. Microsensor measurement of sediment sulfide revealed the presence of sulfide oxidation and sulfide production zones with the interface dynamically regulated by the depth of nitrate penetration. In contrast, the methane production activity of sewer sediment was substantially reduced, likely due to the long-term inhibitory effects of nitrate on methanogens. Pore water measurements showed that methane production activity in the sediment zone with frequent nitrate exposure was completely suppressed, and consequently, the methane production zone re-established deeper in the sediment where nitrate penetration was infrequent.

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http://hdl.handle.net/10453/119145