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ODOR CONTROL TECHNOLOGIES AT POTWS AND RELATED INDUSTRIAL AND AGRICULTURAL FACILITIES

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This paper provides a summary and assessment of literature findings on odor control strategies and technologies implemented at publicly-owned treatment works (POTWs), as well as viable and innovative odor control strategies and approaches used at industrial and agricultural facilities that could be applicable to POTWs. This effort of assessing literature on odor control approaches is part of a Water Environment Research Foundation (WERF)-sponsored larger study that is focussed on odor identification and characterization, odor sampling and measurement approaches and methods, as well as odor control strategies and technologies within POTWs and collection systems and within related agricultural and industrial facilities. The WERF-sponsored study is currently being undertaken by Los Angeles County Sanitation Districts and CH2M HILL.

Literature findings on odor control at POTWs within the past ten years show that odor control approaches currently in use in collection systems include mainly chemical addition and oxygen addition, with fewer applications of gas phase odor control. Odor control technologies currently in use at POTWs include mainly biofilters, dry scrubbers, wet scrubbers, and thermal oxidation using regenerative thermal oxidizers, recuperative thermal oxidizers, catalytic thermal oxidizers and/or waste gas flares.

One key finding on odor control approaches at POTWs show that most current work is focused on H2S and H2S odor control units. There is a lack of information on concentration ranges and removal efficiencies for compounds such as dimethyl disulfide, methyl mercaptan, and methyl amines. Also, while removal performance for H2S is typically good, removal of other organic compounds varies depending on the technology used.

This paper also presents literature findings on innovative odor control approaches applicable to POTWs, as well as applicable odor control approaches from industrial and agricultural facilities.
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Document Type: Research Article

Publication date: 2001-01-01

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