If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Five Case Histories of Automatic Sludge Age Control

$17.50 plus tax (Refund Policy)

Buy Article:

Abstract:

Control of the sludge-wasting rate from an activated sludge process is considered one of the most important control parameters. Manipulation of the wasting rate has the overall objective of influencing the biology of the activated sludge process. Although the biology can be affected by influent conditions and other operational variables such as dissolved oxygen concentration, the wasting rate is generally considered to be the most influential variable. This conclusion is supported both by mathematical analysis of microbial growth and by practical experience in the field over many years.

Although the sludge age concept is used at many facilities, automatic control of sludge wasting based on sludge age is not yet commonly used. Clearly there is a potential for improved benefits from controlling the plant more closely. Benefits attributed to automatic sludge age control in the WEF manual Automated Process Control Strategies (1997) include reductions in permit violations, increases in design capacity, control of nitrification, and control of filamentous organisms in the aeration basins.

Automatic sludge age control at five different facilities was evaluated as part of a Water Environment Research Foundation project on automation. The five plants utilized four different implementations of sludge age control with one plant implementing two different techniques. Each implementation had different levels of instrumentation and technical complexity. The paper and presentation will evaluate each automatic sludge age control strategy implementation, develop the implicit and explicit assumptions, and present advantages and limitations of each.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864702784900372

Publication date: January 1, 2002

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 These proceedings are not peer reviewed.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