Skip to main content

Evaluation of Mixing in Anaerobic Digesters Using Hydraulic Recirculation

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:

Anaerobic digesters at the City of Sioux Falls, South Dakota were originally designed to be mixed by the hydraulic recirculation of sludge and the recirculation of biogas through gas compressors. The compressors are currently at the end of their useful life and are scheduled to be replaced in the next 3-4 years. Tracer analyses were conducted to evaluate the effectiveness of mixing the primary digesters strictly through hydraulic recirculation. The effectiveness was measured by computing the active volume of the digesters with various mixing schemes and measuring biogas. The results showed that the digesters being fed (recirculated) through the top resulted in a higher active volume than those digesters being fed into the side. This study showed that the Sioux Falls Water Reclamation Plant (SFWRP) was able to effectively mix their primary digesters using only hydraulic recirculation in a system that was designed to use both hydraulic and gas recirculation.

Keywords: Active Volume; Anaerobic Digestion; Hydraulic Residence Time; Initial; Mixing Energy; Velocity Gradient

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864709793952837

Publication date: January 1, 2009

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 These proceedings are not peer reviewed.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/2009/00002009/00000010/art00062
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