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PATHOGEN AND INDICATOR ORGANISM DESTRUCTION BY THE DUAL DIGESTION SYSTEM
Citation:
Appleton, A., C. Leong, AND A. Venosa. PATHOGEN AND INDICATOR ORGANISM DESTRUCTION BY THE DUAL DIGESTION SYSTEM. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-86/306.
Description:
The effectiveness of the dual digestion system (DDS) to destroy pathogenic microorganisms was evaluated at a full-scale treatment facility. The DDS incorporates a pure oxygen aerobic digester (1-day detention time) followed by an anaerobic digester (8-day detention time). Heat biological oxidation is conserved in the aerobic step to achieve thermophilic temperatures. Destruction of three pathogen indicators (total coliform, fecal coliform, and fecal streptococci) and a pathogenic bacteria (Salmonella spp.) were measured during three 10-week sampling periods. Conventional measures of digester performance were also analyzed. The performance of DDS in producing a stabilized, pathogen-free sludge was compared to accepted pathogen reduction technologies. (Copyright (c) 1986 by Journal WPCF.)