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http://dx.doi.org/10.5572/KOSAE.2011.27.6.703

Odor Emission from Sediments in Sewer Systems and Odor Removal using an Electrolytic Oxidation Process  

Ahn, Hae-Young (Department of Civil and Environmental Engineering, Sejong University)
Shin, Seung-Kyu (Department of Civil and Environmental Engineering, Sejong University)
Song, Ji-Hyeon (Department of Civil and Environmental Engineering, Sejong University)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.27, no.6, 2011 , pp. 703-710 More about this Journal
Abstract
Odor emission from domestic sewer systems has become a serious environmental problem. An investigation on a sewer manhole revealed that anaerobic decay of sediment organic matters (SOMs) and related declines of oxidation reduction potential (ORP) in the sediment layer were the main reason of the production of volatile sulfur compounds. In addition, as the anaerobic decaying period continued, the odor intensity rapidly increased with increasing concentrations of $H_2S$ and dimethyl sulfide. As a feasible method to control SOMs and to minimize odor emission potentials, an electrolytic oxidation process has been employed to the sediment sludge phase. In this study, voltages applied to the electrolytic oxidation process were varied as a main system parameter, and its effects on odor removal efficiencies and reaction characteristics were investigated. At the applied voltages greater than 20 V, the system efficiently oxidized the organic matter, and the ORP in the sludge phase increased rapidly. As a consequence, the removal efficiency of hydrogen sulfide was found to be >99% within 60 minutes of the electrolytic oxidation. Overall, the electrolytic oxidation process can be an alternative to control odor emission from sewer systems, and a threshold input energy needs to be determined to achieve effective operation of the process.
Keywords
Sewer sediments; Electrolytic oxidation; Odor emission; Odor potential; Oxidation reduction potential;
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Times Cited By KSCI : 10  (Citation Analysis)
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