A Tale of Three Cities – Different Approaches to Class A Biosolids Management

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The management of biological treatment residuals is a significant activity associated with the overall management and operation of any successful wastewater treatment utility. Estimated operational and maintenance costs for residuals treatment and ultimate disposal can range from 40 to 60 percent of a typical annual treatment facility operating budget and also may represent a similar fraction of overall treatment facility capital investment. From a regulatory perspective the disposal of wastewater treatment residuals is managed at the federal level under 40 CFR 503 for programs which seek to beneficially utilize the residuals as an organic fertilizer or process the residuals in a dedicated residuals incineration facility.

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