Skip to main content

RIGHT-SIZING AN ACTIVATED SLUDGE SYSTEM BY USE OF COD PROFILES

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

A southeastern United States textile mill wastewater was being treated in a standard activated sludge system, utilizing a 7,571 cubic meter (2 million gallon) “plugflow” aeration basin and two 946 m3 (1/4 million gallon) clarifiers. Effluent specifications were not being met. Investigative work included i) understanding the history of the system, ii) determining specific oxygen uptake rates (SOUR), and iii) testing mixed liquor at various points in the system to determine a COD profile throughout the system. The COD data indicated that most of the organic material in the influent wastewater was digested in the first part of the aeration basin but that some of the waste components required more digestion time under aeration than was being supplied. This suggests that a bimodal (or multimodal) distribution of waste was present, with some organic material being easily digestible and some being difficult or slow to break down (refractory organic material) in the biological system. Simply increasing time under aeration by 50% should provide the time needed to meet the effluent COD specification. At this writing, steps were being taken to recommission an idle 3,785 m3 (1 million gallon) aeration basin which would provide the needed 50% increase in aeration time.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864701785019579

Publication date: 2001-01-01

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 These proceedings are not peer reviewed.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