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Gadsden Water Treatment Plant

Gadsden, Alabama

The 24 MGD Gadsden Water Treatment Plant was renovated to improve organic removal, the precursor to disinfection by products, and to improve the mixing, flocculation and sedimentation processes at the facility. The MIEX facility is currently aiding the utility in providing water to its constituents with some of lowest DBP concentrations in the state for a surface water facility, thus decreasing the ingestion of carcinogenic components. The project included variable speed mixing and flocculation for the south side treatment train, as well as MRI hoseless sludge collection systems for the sedimentation basins. Structural enhancements of the concrete basins were completed to increase the longevity of the structures, and additional drains were engineered to reduce the offline time for basin cleaning. The MIEX process uses a magnetized anion exchange resin specifically designed for use as a fluidized bed process for the removal of dissolved organic carbon and other anionic contaminants in drinking water. DOC is a known precursor to DBP formation and is a portion of TOC that passes through a 0.45 um filter. DOC levels in the Coosa River have resulted in distribution system DBP levels approaching EPA regulatory levels.

Scope of Services
Engineering

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