Nitrite effectively inhibits sulfide and methane production in a laboratory scale sewer reactor

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

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Author(s)

  • J. Mohanakrishnan
  • O. Gutierrez
  • R. L. Meyer
  • Z. Yuan

Detail(s)

Original languageEnglish
Pages (from-to)3961-3971
Journal / PublicationWater Research
Volume42
Issue number14
Publication statusPublished - Aug 2008
Externally publishedYes

Abstract

The production and emission of hydrogen sulfide and methane by anaerobic microoganisms in sewer systems is a well-documented problem. The effectiveness of nitrite in controlling sulfide and methane production was tested in a laboratory scale sewer reactor. Nitrite was continuously dosed in the reactor for 25 days at concentrations of 20-140 mg N/L. No sulfide and methane accumulation was observed in the reactor in the presence of nitrite. A significant reduction was observed in the sulfate reduction and methane production capabilities of the biofilm. Nitrite also stimulated biological sulfide oxidation within the biofilm. The nitrite uptake rate of the reactor increased over the nitrite dosing period and nitrous oxide production was observed within the biofilm. When nitrite addition was stopped, sulfate reduction and methane production gradually resumed, and reached pre-nitrite addition levels after 2.5 months. The slow recovery suggests that nitrite can be applied intermittently for sulfide and methane control, which represents a key advantage over similar chemicals such as nitrate and oxygen. The study demonstrates nitrite addition as a promising and effective strategy for the management of sulfide and methane in sewers. Further investigation and optimization are still required before application in the field. © 2008 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Biofilm, Methane, Nitrite, Sewer, Sulfate, 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)

Nitrite effectively inhibits sulfide and methane production in a laboratory scale sewer reactor. / Mohanakrishnan, J.; Gutierrez, O.; Meyer, R. L. et al.
In: Water Research, Vol. 42, No. 14, 08.2008, p. 3961-3971.

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