Evaluation of oxygen injection as a means of controlling sulfide production in a sewer system

Gutierrez, Oriol, Mohanakrishnan, Janani, Sharma, Keshab Raj, Meyer, Rikke Louise, Keller, Jurg and Yuan, Zhiguo (2008) Evaluation of oxygen injection as a means of controlling sulfide production in a sewer system. Water Research, 42 17: 4549-4561. doi:10.1016/j.watres.2008.07.042


Author Gutierrez, Oriol
Mohanakrishnan, Janani
Sharma, Keshab Raj
Meyer, Rikke Louise
Keller, Jurg
Yuan, Zhiguo
Title Evaluation of oxygen injection as a means of controlling sulfide production in a sewer system
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
Publication date 2008-11-01
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.watres.2008.07.042
Open Access Status Not yet assessed
Volume 42
Issue 17
Start page 4549
End page 4561
Total pages 13
Place of publication Kidlington, Oxford
Publisher Pergamon-Elsevier Science
Language eng
Subject C1
9699 Other Environment
090409 Wastewater Treatment Processes
Abstract Oxygen injection is often used to control biogenic production of hydrogen sulfide in sewers. Experiments were carried out on a laboratory system mimicking a rising main to investigate the impact of oxygen injection on anaerobic sewer biofilm activities. Oxygen injection (15-25 mgO(2)/L, per pump event) to the inlet of the system decreased the overall sulfide discharge levels by 65%. Oxygen was an effective chemical and biological oxidant of sulfide but did not cause a cessation in sulfide production, which continued in the deeper layers of the biofilm irrespective of the oxygen concentration in the bulk. Sulfide accumulation resumed instantaneously on depletion of the oxygen. Oxygen did not exhibit any toxic effect on sulfate reducing bacteria (SRB) in the biofilm. It further stimulated SRB growth and increased SRB activity in downstream biofilms due to increased availability of sulfate at these locations as the result of oxic conditions upstream. The oxygen uptake rate of the system increased with repeated exposure to oxygen, with concomitant consumption of organic carbon in the wastewater. These results suggest that optimization of oxygen injection is necessary for maximum effectiveness in controlling sulfide concentrations in sewers. (C) 2008 Elsevier Ltd. All rights reserved.
Formatted abstract
Oxygen injection is often used to control biogenic production of hydrogen sulfide in sewers. Experiments were carried out on a laboratory system mimicking a rising main to investigate the impact of oxygen injection on anaerobic sewer biofilm activities. Oxygen injection (15–25 mg O2/L per pump event) to the inlet of the system decreased the overall sulfide discharge levels by 65%. Oxygen was an effective chemical and biological oxidant of sulfide but did not cause a cessation in sulfide production, which continued in the deeper layers of the biofilm irrespective of the oxygen concentration in the bulk. Sulfide accumulation resumed instantaneously on depletion of the oxygen. Oxygen did not exhibit any toxic effect on sulfate reducing bacteria (SRB) in the biofilm. It further stimulated SRB growth and increased SRB activity in downstream biofilms due to increased availability of sulfate at these locations as the result of oxic conditions upstream. The oxygen uptake rate of the system increased with repeated exposure to oxygen, with concomitant consumption of organic carbon in the wastewater. These results suggest that optimization of oxygen injection is necessary for maximum effectiveness in controlling sulfide concentrations in sewers.
Keyword Sulfide
oxygen
biofilm
sulfate reducing bacteria
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
Advanced Water Management Centre Publications
 
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Created: Sat, 28 Mar 2009, 22:38:18 EST by Suzanne Read on behalf of Advanced Water Management Centre