Kinetics of aerobic oxidation of volatile sulfur compounds in wastewater and biofilm from sewers

Elise Alice Rudelle, Jes Vollertsen, Thorkild Hvitved-Jacobsen, Asbjørn Haaning Nielsen

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Abstract

Laboratory experiments were conducted to investigate the kinetics of aerobic chemical and biological oxidation of selected odorous volatile sulfur compounds (VSCs) by wastewater and biofilm from sewers. The VSCs included methyl mercaptan (MeSH), ethyl mercaptan (EtSH), dimethyl sulfide (DMS) and total inorganic sulfide, which have all been reported as main constituents of foul sewer gas. Samples of wastewater and biofilm for the experiments were obtained from two locations that differed significantly with respect to occurrence of VSCs. One location represented an odor hot-spot downstream of a force main and the other was a gravity sewer transporting young aerobic wastewater. The kinetics of VSC oxidation for both wastewater and suspended biofilm samples followed a first-order rate equation. The average values of the reaction rate constants demonstrated the following order of reactivity: total inorganic sulfide > EtSH > MeSH >> DMS. Except for total inorganic sulfide oxidation in wastewater, kinetic parameters for each VSC were of similar magnitude for the two locations. In the wastewater from the odor hot-spot, sulfide oxidation rates were approximately 12 times faster than in the aerobic wastewater.
Original languageEnglish
Title of host publicationProceedings from the 5th IWA Specialized Conference on Odours and Air Emmissions Jointly Held with 10th Conference on Biofiltration for Air Pollution Control
Number of pages8
PublisherIWA Publishing
Publication date4 Mar 2013
Publication statusPublished - 4 Mar 2013
EventThe International Water Association Conference on Odours and Air Emmissions - San Francisco, California, United States
Duration: 4 Mar 20137 Mar 2013
Conference number: 5

Conference

ConferenceThe International Water Association Conference on Odours and Air Emmissions
Number5
CountryUnited States
CitySan Francisco, California
Period04/03/201307/03/2013

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Keywords

  • Odor
  • Oxidation
  • Volatile sulfur compounds
  • Wastewater

Cite this

Rudelle, E. A., Vollertsen, J., Hvitved-Jacobsen, T., & Nielsen, A. H. (2013). Kinetics of aerobic oxidation of volatile sulfur compounds in wastewater and biofilm from sewers. In Proceedings from the 5th IWA Specialized Conference on Odours and Air Emmissions Jointly Held with 10th Conference on Biofiltration for Air Pollution Control IWA Publishing.