Skip to main content

Two-Phase Anaerobic Digestion of Municipal Sewage Sludge Optimization of the Pathogen Destruction

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

The Two-Phase Thermo-Meso Anaerobic Digestion of municipal sewage sludge has gathered a lot attention in recent years for its capability to produce Class A biosolids. During 1997 and 1998 Suez and Ondeo Degremont, Inc. ran a pilot study of the Two-Phase Thermo-Meso Feed-Sequencing Anaerobic Digestion at the Belmont AWT facility in Indianapolis, Indiana. Consistent production of Class A biosolids as well as 3-log and 2-log reduction of enteric virus and viable helminth ova respectively were documented. Most of the pathogen destruction occurred in the first phase of the process. Data from the literature was carefully reviewed in an attempt to find the cause of such extensive pathogen reduction. The use of a well-mixed “draw and fill” digester, a thermophilic temperature, the presence of free ammonia and volatile fatty acids (VFA) were all found to be germicidal. A combination of all these factors in the first phase of the process is believed to be at the source of the pathogen destruction observed. The pilot test results can be reasonably extrapolated to full-scale systems as long as proper operation of the thermophilic phase is ensured and sufficient mixing is provided with the industrial size digesters. The Two-Phase Thermo-Meso Feed-Sequencing Anaerobic Digestion process (2PAD™) has currently a site-specific PFRP equivalency recommendation. However, this recommendation is in the process to be changed over to a “conditional” national PFRP equivalency recommendation.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864702784162868

Publication date: 2002-01-01

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 These proceedings are not peer reviewed.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