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Design, Construction, Installation, and Operation of a Compact Bio-Oxidation System to Manage Odors at the City of Wilsonville WWTP

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The 5 mgd Wilsonville WWTP was experiencing odor complaints from the adjacent residential neighborhood. An existing in-ground, bark and wood-chip biofilter was not performing well. In December 2004, the City of Wilsonville contacted BioReaction Industries (BRI) requesting the design of a bio-oxidation system with guaranteed performance criteria. The project required an understanding of the nature of the odor problem and quick implementation of a solution to reduce odors under the agreed-upon performance criteria. The design necessitated a small footprint due to site limitations, and rapid construction and installation to address the recurring odor problems. An induced draft, multi-stage system consisting of a 12'd × 24'h biotrickling filter followed by a 12'd × 24'h biomatrix tower was the solution, providing greater than 99% reduction of H2S and reduce organo-sulfur compounds to below the odor threshold in the 8,000 cfm process airstream. Construction and installation was rapid and the bio-oxidation system has been in continuous operation since start-up in early June 2005 with no malfunctions and no increases in back pressure or other operational issues. Data collected on system performance demonstrated that the engineered biofilter is achieving all performance criteria.
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Document Type: Research Article

Publication date: 2006-01-01

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