Anaerobic Digestion - Improving Energy Efficiency with Mixing

$17.50 plus tax (Refund Policy)

Buy Article:

Abstract:

Anaerobic digesters continue to be a focus for processing wastewater solids to produce a renewable fuel source, digester gas. Effective mixing of the digester contents is important for process stability, maximizing gas production, minimizing scum and foam formation, and preventing solids deposition in the digester. Mixing requires electrical power which is often generated by coal-fired power plants. With the concern regarding electrical power cost and the interest in reducing greenhouse gas emissions, there is a renewed focus on reducing the power required for digester mixing. This paper reports the test results of a new mixing system called the Vertical Linear Motion Mixer (VLMM) manufactured by Enersave Fluid Mixer, Inc which was shown to have comparable performance to other more conventional mixing systems (impeller draft tube mixers) with substantially less electrical power needed. The test results represent testing conducted at the Ina Road Wastewater Reclamation Facility (WRF), located in Tucson, Arizona. One new mixer was retrofitted to a conventional “pancake” digester and compared to an identical digester using five impeller draft tube mixers.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864708788735637

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 These proceedings are not peer reviewed.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

Tools

Favourites

Share Content

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