Optimization of intermittent, simultaneous dosage of nitrite and hydrochloric acid to control sulfide and methane productions in sewers

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
  • Jurg Keller
  • Zhiguo Yuan

Detail(s)

Original languageEnglish
Pages (from-to)6163-6172
Journal / PublicationWater Research
Volume45
Issue number18
Publication statusPublished - 15 Nov 2011
Externally publishedYes

Abstract

Free nitrous acid (FNA) was previously demonstrated to be biocidal to anaerobic sewer biofilms. The intermittent dosing of FNA as a measure for controlling sulfide and methane productions in sewers is investigated. The impact of three key operational parameters namely the dosing concentration, dosing duration and dosing interval on the suppression and subsequent recovery of sulfide and methane production was examined experimentally using lab-scale sewer reactors. FNA as low as 0.26. mg-N/L was able to suppress sulfide production after an exposure of 12. h. In comparison, 0.09. mg-N/L of FNA with 6-h exposure was adequate to restrain methanogenesis effectively. The recovery of sulfide production was well described by an exponential recovery equation. Model-based analysis revealed that 12-h dosage at an FNA concentration of 0.26. mg-N/L every 5 days can reduce the average sulfide production by >80%. Economic analysis showed that intermittent FNA dosage is potentially a cost-effective strategy for sulfide and methane control in sewers. © 2011 Elsevier Ltd.

Research Area(s)

  • Biocidal effect, Free nitrous acid, Intermittent dosing, Methane, Modeling, Nitrite, Recovery, Sewer, 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)

Optimization of intermittent, simultaneous dosage of nitrite and hydrochloric acid to control sulfide and methane productions in sewers. / Jiang, Guangming; Gutierrez, Oriol; Sharma, Keshab Raj et al.
In: Water Research, Vol. 45, No. 18, 15.11.2011, p. 6163-6172.

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