title: Evaluation of the effectiveness of five odor reducing  agents for sewer system odors using an on-line total  reduced sulfur analyzer.
abstract: Sewer odors have been a concern to citizens of the Metropolitan Seoul region, which has installed combined sewer systems (CSSs) in 86% of its area. Although a variety of odorants are released from sewers, volatile sulfur compounds (VSCs) have been recognized as major ones. A number of technologies have been proposed to monitor or control odors from sewers. One of the most popular strategies adopted for the control of sewage odor is by applying a commercial odor-reducing agent into the sewer. In this study, the effectiveness of five different commercial odor-reducing agents (i.e., an odor masking agent, an alkaline solution, two microbial agents, and a chemical oxidant) was evaluated by continuously monitoring VSCs released from the sewer with an on-line total reduced sulfur (TRS) analyzer before and after each agent was sprayed into CSSs at five different locations of the city. In short, when the effectiveness of odor treatment was tested in the sewer system using five commercial odor reducing treatments, only the chemical oxidant was good enough to reduce the odor in terms of TRS levels measured before and after the application (p < 0.01).
authors.affiliation: Department of Energy and Environmental System Engineering, University of Seoul, 90 Jeonnong-dong, Dongdaemun-gu, Seoul 130-743, Korea. il_choi@hangulmail.com
authors.forename: Il
authors.initials: I
authors.lastname: Choi
authors.forename: Hyunjoo
authors.initials: H
authors.lastname: Lee
authors.forename: Joungdu
authors.initials: J
authors.lastname: Shin
authors.forename: Hyunook
authors.initials: H
authors.lastname: Kim
mesh_terms: D006801:Humans; D006862:Hydrogen Sulfide / Q000737:chemistry; D009812:Odorants / Q000032:analysis*; D019163:Reducing Agents / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D013455:Sulfur / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid / Q000295:instrumentation
chemical_list: D019163:Reducing Agents; D012722:Sewage; D013455:Sulfur; D006862:Hydrogen Sulfide