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Full-Scale Results of the Columbus Biosolids Flow-Through Thermophilic Treatment (CBFT3) and Cogeneration System

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Brown and Caldwell, and Columbus Water Works (CWW), located in Columbus, Georgia, have developed an innovative thermophilic anaerobic digestion process to produce Class A biosolids and have coupled the process with a Combined Heat and Power (CHP) or cogeneration system whereby digester gas will be used to generate renewable electrical and thermal energy. The Columbus Biosolids Flow-Through Thermophilic Treatment (CBFT3) and Cogeneration System project consists of first-of-its-kind technology in developing a Process-to-Further-Reduce-Pathogens (PFRP) to USEPA Class A standards. Previous work(i) focused on research and development of the thermophilic stabilization process; the design, construction, and testing of a full-scale prototype plug-flow reactor unique to the CBFT3 process; and key engineering, design and construction elements of the CBFT3 and Cogeneration System.

Construction of the project was completed in July 2010 and the system is currently under-going start-up and commissioning. This paper presents key design and construction issues as well as preliminary full-scale performance results. This project represents the culmination of over seven years of research and engineering evaluations that are being demonstrated at full-scale that will significantly advance the art of anaerobic digestion design and operation.

Keywords: Class A Biosolids; Cogeneration; Combined Heat and Power; Green Power; Renewable Energy; Temperature-Phased Anaerobic Digestion; Thermophilic Anaerobic Digestion

Document Type: Research Article


Publication date: January 1, 2010

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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