Skip to main content

STARTUP AND OPERATION OF ACID DIGESTION FACILITY

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Treatment and disposal of municipal sludge continues to attract the attention of City Officers and Engineers. Anaerobic digestion is one of the most widely used method of sludge treatment. Anaerobic digestion results in stabilization of sludge with the reduction in the quantity of solids in addition to a reduction in bacteria levels and odors. The products of anaerobic digestion are environmentally friendly and have economic value – the biogas is used for heating or energy generation while the solids are used for plant nutrition.

Anaerobic digestion is a multistage biochemical process that involves two physiologically different types of bacteria – acidogenic bacteria, which converts the organic matter into soluble compounds and volatile fatty acids and methanogenic bacteria, which converts the fatty acids into methane and carbon dioxide. Traditionally, all four stages – hydrolysis, acidogenesis, acetogenesis, and methanogenesis – occurred in a single digester tank. And because both types of bacteria are in the same vessel, growth of either type is not optimized, making the conventional digestion process inherently unstable and inefficient.

Two-phase acid/gas anaerobic digestion is a relatively new process in which the various stages of digestion are performed in different vessels or digesters. This process optimizes the growth of both types of bacterial resulting in a stable and efficient process. However, the installed base and collective experience in the operation of two-phase digestion is very limited. The design of acid digesters are mostly based on that of conventional single phase digesters. In addition, most of the existing two-phase digesters are being operated as conventional digesters due to operational problems.

Southside Wastewater Treatment Plant employs two-phase digestion for its solids treatment. This paper explores the problems encountered during process startup and the various ways to maintain operations. It identifies conditions that impact process stability. It also confirms known advantages of higher specific gas production, higher reduction in bacteria levels and higher volatile solids destruction.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2007-01-01

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.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed 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