Skip to main content

Effluent suspended solid control of activated sludge process by fuzzy control approach

Buy Article:

$30.00 plus tax (Refund Policy)

Abstract:

The influent flow rate and substrate concentration normally vary with time in a municipal wastewater treatment plant (MWWTP). The treatment units must be operated dynamically to prevent the process from failing, reducing treatment efficiency, and creating a lack of stability. Using real time operation data to control the dynamic activated sludge process (DASP) systematically is an alternative approach to the expert system, which is based on experts' knowledge and/or operators' experiences and whose control rules are typically difficult to be derived by a systematic approach. The fuzzy control theory based on modified Newton's method can make real-time control feasible and is adopted in this study. The theory is definitely a systematic approach toward deriving optimum control strategies on-line. The optimum control strategies derived from the proposed approach are verified by experimental results that indicate that the forecast and control abilities of fuzzy model are sufficient. The proposed systematic approach only requires on-line monitored data, not experts' knowledge and operators' experiences, to adequately control the complex system. This feature is possible despite the fact that the system information is not clearly described, the kinetic model and related parameters are unknown, or the dynamic behaviors of the process are not thoroughly understood. Moreover, a comparison is also made in this study of the results between F:M ratio and fuzzy control strategies. That comparison reveals that the F:M control might not be appropriate for DASP when municipal wastewater is treated. The fuzzy control strategies confirm that the operating concepts for DASP are similar to those for a steady-state condition and can make the effluent quality better and more stable. The only difference between both systems is that time delay problems arise in DASP, but not in steady-state ASP.

Keywords: ACTIVATED SLUDGE; DYNAMIC CONTROL; FUZZY CONTROL; TOTAL SUSPENDED SOLIDS

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143096X128045

Publication date: September 1, 1996

More about this publication?
  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • WEF Bookstore
  • ingentaconnect is not responsible for the content or availability of external websites
wef/wer/1996/00000068/00000006/art00010
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
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