Sulfur transformation in rising main sewers receiving nitrate dosage

Jiang, Guangming, Sharma, Keshab Raj, Guisasola, Albert, Keller, Jurg and Yuan, Zhiguo (2009) Sulfur transformation in rising main sewers receiving nitrate dosage. WATER RESEARCH, 43 17: 4430-4440. doi:10.1016/j.watres.2009.07.001


Author Jiang, Guangming
Sharma, Keshab Raj
Guisasola, Albert
Keller, Jurg
Yuan, Zhiguo
Title Sulfur transformation in rising main sewers receiving nitrate dosage
Journal name WATER RESEARCH   Check publisher's open access policy
ISSN 0043-1354
Publication date 2009-09-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.watres.2009.07.001
Volume 43
Issue 17
Start page 4430
End page 4440
Total pages 11
Editor David Dixon
Jean-Claude Block
Mogens Henze
Place of publication United Kingdom
Publisher Pergamon
Language eng
Subject C1
Abstract The anoxic and anaerobic sulfur transformation pathways in a laboratory-scale sewer receiving nitrate were investigated. Four reactors in series were employed to imitate a rising main sewer. The nitrate-dosing strategy was effective in controlling sulfide, as confirmed by the long-term sulfide measurements. Anoxic sulfide oxidation occurred in two sequential steps, namely the oxidation of sulfide to elemental sulfur (S(0)) and the oxidation of S(0) to sulfate (SO(4)(2-)). The second oxidation step, which primarily occurred when the first step was completed, had a rate that is approximately 15% of the first step. When nitrate was depleted, sulfate and elemental sulfur were reduced simultaneously to sulfide. Sulfate reduction had a substantially higher rate (5 times) than S(0) reduction. The relatively slower S(0) oxidation and reduction rates implied that S(0) was an important intermediate during anoxic and anaerobic sulfur transformation. Electron microscopic studies indicated the presence of elemental sulfur, which was at a significant level of 9.9 and 16.7 mg-S/g-biomass in nitrate-free and nitrate-exposed sewer biofilms, respectively. A conceptual sulfur transformation model was established to characterize predominant sulfur transformations in rising main sewers receiving nitrate dosage. The findings are pertinent for optimizing nitrate dosing to control sulfide in rising main sewers.
Keyword Sulfide
Elemental sulfur
Sulfate
Sewer
Sulfur transformation
Nitrate
BIOLOGICALLY PRODUCED SULFUR
HYDROGEN-SULFIDE
ELEMENTAL SULFUR
WASTE-WATER
OIL-FIELD
OXIDATION
REMOVAL
OXYGEN
BIOFILMS
KINETICS
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID LPG454182
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
Advanced Water Management Centre Publications
 
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Created: Fri, 16 Apr 2010, 22:09:30 EST by Ana Esposo on behalf of Advanced Water Management Centre