Skip to main content

Pilot Testing Results of a Two-Stage Anaerobic System Treating Distillery Wastewater

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


Wastewater generated during the rum manufacturing process must be treated prior to its discharge to surface water. One distillery's onsite wastewater treatment plant consists of an equalization tank followed by four fixed-film, down-flow, single-stage anaerobic reactors. It was hypothesized that the addition and optimization of a first-stage acidification reactor, while maintaining the existing second-stage methanogenic reactors, would significantly increase the capacity of the WWTP by driving acidogenesis towards production of acetic acid (minimizing longer chain VFAs), the primary substrate for methanogenesis. To investigate this concept, a pilot-scale system was operated consisting of a completely-mixed, suspended growth first-stage acidification reactor followed by a second-stage fixed-film reactor operated in a down-flow mode. Results showed that the optimum HRT of the acidification reactor is 24 hours or less and that rigorous pH control in the acidification reactor is crucial to the production of acetic acid, with the optimum pH being 5.5 s.u.

Keywords: Acidogenesis; Anaerobic; Distillery; Hydraulic Retention Time; Methanogenesis; Two-Stage; Volatile Fatty Acids; Wastewater

Document Type: Research Article


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 These proceedings are not peer reviewed.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

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
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