Effects of nitrite concentration and exposure time on sulfide and methane production in sewer systems

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

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Author(s)

  • Guangming Jiang
  • Oriol Gutierrez
  • Keshab Raj Sharma
  • Zhiguo Yuan

Detail(s)

Original languageEnglish
Pages (from-to)4241-4251
Journal / PublicationWater Research
Volume44
Issue number14
Publication statusPublished - Jul 2010
Externally publishedYes

Abstract

Nitrite dosing is a promising technology to prevent sulfide and methane formation in sewers, due to the known inhibitory/toxic effect of nitrite on sulfate-reducing bacteria (SRB) and methanogenic Archaea (MA). The dependency of nitrite-induced inhibition on sulfide and methane producing activities of anaerobic sewer biofilms on nitrite levels and exposure time is investigated using a range of nitrite concentrations (40, 80, 120 mg-N/L) and exposure time up to 24 days. The recovery of these activities after the 24-day nitrite dosage was also monitored for more than two months. The inhibition level was found to be dependent on both nitrite concentration and exposure time, with stronger inhibition observed at higher nitrite concentrations and/or longer exposure time. However, the time required for achieving 50% recovery of both sulfate-reducing and methanogenic activities after the cessation of nitrite dosage only marginally depended on nitrite concentration. Model-based analysis of the recovery data showed that the recovery was likely due to the regrowth of SRB and methanogens. The lab studies and mathematical analysis supported the development of an intermittent dosing strategy, which was tested in a 1-km long rising main sewer. The field trial confirmed that intermittent dosing of nitrite can effectively reduce/prevent the formation of both sulfide and methane. © 2010 Elsevier Ltd.

Research Area(s)

  • Inhibition, Methane, Methanogen, Modeling, Nitrite, Recovery, 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)

Effects of nitrite concentration and exposure time on sulfide and methane production in sewer systems. / Jiang, Guangming; Gutierrez, Oriol; Sharma, Keshab Raj et al.
In: Water Research, Vol. 44, No. 14, 07.2010, p. 4241-4251.

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