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TECHNOLOGY EVALUATION OF THE DUAL DIGESTION SYSTEM
Citation:
Appleton, A. AND A. Venosa. TECHNOLOGY EVALUATION OF THE DUAL DIGESTION SYSTEM. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-86/150 (NTIS PB87116802), 1986.
Description:
Full-scale performance and costs of an innovative sludge stabilization process were evaluated at the three plants. The DDS incorporates a 1-day-detention-time, pure oxygen aerobic digester followed in series by an 8-day-detention-time anaerobic digester. Heat of biological oxidation is conserved in the aerobic step; additional heat input is not required for the anaerobic step. The biogas generated by anaerobic digestion is usable elsewhere to help offset oxygen costs. Aerobic operation can be either mesophilic or thermophilic. Process operation, reliability, solids reduction, and capital and operating costs were evaluated.