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Temperature Control of the Activated Sludge Process at a SOCMI HON Regulated Industrial POTW- The Search for Baby Bear's Porridge

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Gulf Coast Waste Disposal Authority (GCA) recently started up an innovative system to control aeration basin summer operating temperatures in an activated sludge system. This system was installed in a facility subject to air emission control requirements for Hazardous Air Pollutants (HAP) and Volatile Organic Compounds (VOC) under Synthetic Organic Chemical Manufacturing Industry Hazardous Organic NESHAP (SOCMI HON) regulations and Texas Regulation V. The system was successful in controlling operating temperatures in the facility during one of the hottest summers on record, while maintaining compliance with all applicable water and air emission regulations. The installed system uses a cooling tower on the return activated sludge (RAS) stream to remove the excess heat from the system. Though several options were evaluated during the course of this project, this paper focuses on the analysis that lead to the chosen path, and presents some lessons learned related to the physical design of such a system.
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Document Type: Research Article

Publication date: 01 January 2001

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