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

Liu, Yiwen, Sharma, Keshab R., Ni, Bing-Jie, Fan, Lu, Murthy, Sudhir, Tyson, Gene Q. and Yuan, Zhiguo (2015) Effects of nitrate dosing on sulfidogenic and methanogenic activities in sewer sediment. Water Research, 74 155-165. doi:10.1016/j.watres.2015.02.017


Author Liu, Yiwen
Sharma, Keshab R.
Ni, Bing-Jie
Fan, Lu
Murthy, Sudhir
Tyson, Gene Q.
Yuan, Zhiguo
Title Effects of nitrate dosing on sulfidogenic and methanogenic activities in sewer sediment
Journal name Water Research   Check publisher's open access policy
ISSN 1879-2448
0043-1354
Publication date 2015-05-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.watres.2015.02.017
Open Access Status
Volume 74
Start page 155
End page 165
Total pages 11
Place of publication London, United Kingdom
Publisher IWA Publishing
Collection year 2016
Language eng
Abstract 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.
Keyword Sewer sediment
Sulfide
Methane
Nitrate
Micro-scale profiling
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Australian Centre for Ecogenomics
Official 2016 Collection
Advanced Water Management Centre Publications
 
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Created: Fri, 06 Mar 2015, 13:06:31 EST by Mrs Louise Nimwegen on behalf of School of Chemistry & Molecular Biosciences