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, Keller, Jurg and Yuan, Zhiguo (2011) Optimization of intermittent, simultaneous dosage of nitrite and hydrochloric acid to control sulfide and methane productions in sewers. Water Research, 45 18: 6163-6172. doi:10.1016/j.watres.2011.09.009


Author Jiang, Guangming
Gutierrez, Oriol
Sharma, Keshab Raj
Keller, Jurg
Yuan, Zhiguo
Title Optimization of intermittent, simultaneous dosage of nitrite and hydrochloric acid to control sulfide and methane productions in sewers
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
1879-2448
Publication date 2011-11
Sub-type Article (original research)
DOI 10.1016/j.watres.2011.09.009
Volume 45
Issue 18
Start page 6163
End page 6172
Total pages 10
Place of publication London, England, U.K.
Publisher I W A Publishing
Collection year 2012
Language eng
Formatted 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.
Keyword Sulfide
Methane
Sewer
Nitrite
Free nitrous acid
Intermittent dosing
Biocidal effect
Waste-Water
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Advanced Water Management Centre Publications
 
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