Skip to main content

A Perfect Synergy of Pathogen Reduction and Renewable Energy – The Columbus Water Works CBFT3 and Cogeneration System Project

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Brown and Caldwell and Columbus Water Works (CWW) located in Columbus, Georgia, have led the development of a new Class A digestion process named Columbus Biosolids Flow-Through Thermophilic Treatment (CBFT3). The new process offers a low-cost option – as compared to other EPA approved processes – for upgrading existing anaerobic digestion facilities from Class B to Class A Biosolids. To achieve Class A pathogen reduction, an existing completely-mixed mesophilic digester was converted to operate at thermophilic temperature and is followed by two plug flow reactors (PFRs) operated in series to achieve a minimum contact time of 30-minutes. Sludge is then further digested in the two existing mesophilic digesters to achieve additional volatile solids destruction.

This project also incorporates a combined heat and power (CHP) or cogeneration system that will generate about 40-percent of the plant's electricity demand as renewable green power using digester gas that would otherwise be flared. Heat recovered from the cogeneration system will be used to heat the digestion process in its entirety. Construction of the CBFT3 and Cogeneration System Project is complete and process start-up activities are underway. This paper presents a summary of project goals and benefits, background information regarding project research and engineering evaluation results, and a description of the construction elements and facility improvements.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

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: 01 January 2010

More about this publication?
  • 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 These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more