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

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Oriol Gutierrez
  • Janani Mohanakrishnan
  • Keshab Raj Sharma
  • Rikke Louise Meyer
  • Jürg Keller

Detail(s)

Original languageEnglish
Pages (from-to)4549-4561
Journal / PublicationWater Research
Volume42
Issue number17
Publication statusPublished - Nov 2008
Externally publishedYes

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. © 2008 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Biofilm, Oxygen, Rising main sewer, Sulfate reducing bacteria, Sulfide

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Evaluation of oxygen injection as a means of controlling sulfide production in a sewer system. / Gutierrez, Oriol; Mohanakrishnan, Janani; Sharma, Keshab Raj et al.
In: Water Research, Vol. 42, No. 17, 11.2008, p. 4549-4561.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review