Skip to main content

It's Getting Clearer: A New View of Seasonal Changes in Secondary Sedimentation Linked to Variable Biomass Density

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Seasonal variations in activated sludge settleability were evaluated in six full scale wastewater treatment facilities in Central New Mexico, with special attention to the role of biomass density (mass per biomass volume) on settling. Recent work has demonstrated that varying biomass density may play an important role in activated sludge settleability, with plant configuration and operation both affecting density. Density was found to vary seasonally, and was highest in the summer in the four activated sludge plants studied, but there was little variability in two membrane bioreactor systems. Both density and filament content affected settleability. Seasonal variations in non-volatile suspended solids apparently contributed to the observed variations in density. These result should help plants understand factors affecting seasonal variability in clarifier performance, in addition to other known phenomena such as changes in filament content and temperature effects on water characteristics.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: Density; phosphorus; secondary sedimentation; settleability

Document Type: Research Article

Publication date: 2009-01-01

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 These proceedings are not peer reviewed.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
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