Skip to main content

New (First Ever) Site Specific PSRP–Equivalent Anaerobic Digestion Process Increases Digestion Capacity by Fifty Percent

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

or click here to sign up for a free trial

Abstract:

A low mean cell residence time (MCRT), i.e., 10–15 days, complete-mix thermophilic anaerobic digestion process was tested to demonstrate compliance with the U.S. Environmental Protection Agency (EPA) equivalency criteria for a Process to Significantly Reduce Pathogens (PSRP). Full-scale tests show that the digestion process developed by the East Bay Municipal Utility District (EBMUD) consistently exceeded EPA's required vector attraction and pathogen reduction performance standards.

After intensive review by the U.S. EPA, EBMUD's process was approved as a site-specific PSRP-equivalent process on November 29, 2010; the very first granted since the 40 CFR Part 503 rule was promulgated in 1993. The EPA's approval allows EBMUD to operate its digesters down to a 10-day MCRT, replacing the previous 15-day minimum, thus effectively increasing digester capacity by 50% and potentially saving about 60 million or more in future digester construction.

This work has broad application to all wastewater treatment plants with anaerobic digesters.

Keywords: 40 CFR Part 503; PSRP; anaerobic digestion; digester capacity; fecal coliform; mean cell residence time (MCRT); thermophilic; volatile solids

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864711802766326

Publication date: January 1, 2011

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 These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites
wef/wefproc/2011/00002011/00000010/art00027
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial 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