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DETERMINING THE STABILITY OF TREATED MUNICIPAL SLUDGES
Citation:
Jeris, J., D. Ciarcia, E. Chen, AND M. Mena. DETERMINING THE STABILITY OF TREATED MUNICIPAL SLUDGES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-85/001.
Description:
The objective of this project was to determine the potential for further biological degradation biologically of municipal sludges which have undergone either little or major treatment. A literature survey was conducted to determine the most fruitful approaches, followed by laboratory scale studies. The literature survey summarizes available information related to the characteristics and various stability parameters of municipal sludges that have undergone treatment by anaerobic, aerobic or thermal conditioning processes. The laboratory study built upon methods described in the literature for evaluating stability of sludges. Stability of a variety of received sludges was evaluated by measuring response to additional aerobic or anaerobic digestion of long duration, and by cumulative generation of hydrogen sulfide. Responses to aerobic digestion of the as-received sludges were generally similar and showed substantial reductions in parameters such as BOD and COD.