Skip to main content

Innovative FOG and Cake Digestion—The Key to Biosolids Processing Energy and Cost Savings for Pinellas County

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Pinellas County, Florida operates digesters processing sludge and Fat, Oil & Grease (FOG) at its 125 × 106 L/d South Cross Bayou Water Reclamation Facility (SCBWRF). The produced biogas is used in the SCBWRF biosolids dryer/pelletizer. The County is presently trucking dewatered sludge cake from the 34 × 106 L/d William E. Dunn WRF (WEDWRF) to the SCBWRF and processing the cake in the sludge pelletizer. Three major alternatives were compared: (1) singlestage digestion for sludge and FOG; (2) acid-methane digestion of the SCBWRF sludge, FOG, and rehydrated WEDWRF cake; and (3) acid-methane digestion of SCBWRF sludge and FOG. Compared to alternative (1), (2) provided immediate construction cost savings of 4,500,000 and annual savings of 700,000, and it was the only alternative that generated excess methane to allow for on-site electricity generation. Alternative (3) saved 7,500,000 in construction cost over alternative (1) and 500,000 in annual cost, but would eventually run out of dryer capacity. Alternative (2) was selected because of its lowest lifecycle cost, ability to process all of the produced cake through the dryer, and being the most sustainable option.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864708788805044

Publication date: January 1, 2008

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 These proceedings are not peer reviewed.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
  • ingentaconnect is not responsible for the content or availability of external websites
wef/wefproc/2008/00002008/00000011/art00004
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
ingentaconnect 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