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Carbon Filtration Cost Effectively Removes PCB from Municipal Wastewater

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The wastewater treatment plant in the City of Bay City, Michigan, received Polychlorinated Biphenyl (PCB) from contaminated groundwater and residual solids present in the combined sewer system. In spite of the City's efforts to eliminate the PCB at the source PCB is still often detected in the plant influent. The City underwent extensive studies at the plant to develop the most cost effective PCB treatment process. The nearly 50-year old facility was also renovated to provide reliable liquid and solids stream treatment processes to augment the new PCB removal system.

The PCB removal was accomplished with direct granular activated carbon filtration of the secondary effluent. Solids streams at the facility containing PCB can now be segregated for more efficient removal to landfill, reducing recycle of solids potentially containing PCB. The unique (patent pending process) of direct carbon filtration eliminated the need for sand filtration prior to the granular activated carbon thus providing substantial capital cost savings.
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Document Type: Research Article

Publication date: 2005-01-01

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