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Long Term Characterization of Polyurethane Panel Diffusers Installed in Irregular Shaped Aeration Tanks

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Following the installation of polyurethane panel diffusers at the City of Richland's treatment plant aeration basin, off-gas oxygen transfer efficiency tests were conducted to confirm design values for alpha and to observe any deterioration in diffuser performance after two years of operation. The measured values of alpha were lower than had been anticipated. It was determined that contributing factors to these lower values were increased plant loading stemming from changes in sludge management practice, lower SRTs, and the aeration basin geometry. It was suggested that the sloped walls of the aeration basin contributed to the lower OTE values than comparative measurements in straight-sided aeration basins.

Keywords: Off-gas OTE measurement; irregular shaped aeration tanks; polyurethane panel diffusers

Document Type: Research Article


Publication date: 2009-01-01

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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