Selection and full-scale use of a chelated iron absorbent for odor control
Odors had been a chronic operational problem at the City and County of Honolulu's Sand Island W W T P since it began service in 1979. A field survey identified the release of hydrogen sulfide as the major odor source and concluded that off-gas collection and treatment afforded the best methods for abatement. A pilot program was initiated that tested caustic scrubbing and a chelated iron catalytic absorbent. The latter was selected based on performance, economics, and chemical-handling requirements.
The full-scale system was designed to treat 10.9 m3/s (23 000 scfm) of air and achieve a 95% reduction in hydrogen sulfide levels, which were expected to range from an average of 75 ppm (V/V) to a peak of 150 ppm. The design used two fiberglass packed towers operating in series followed by activated carbon adsorbers. The system has been in service since June 1986 and has shown itself to be effective in controlling odors.
Document Type: Research Article
Publication date: March 1, 1992
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- Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year. Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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