Skip to main content

After Over a Decade of Foaming, the Development of a Statistical Model Combined with Traditional Microscopy Provides Operating Guidelines

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The goal of this study was to use traditional microscopy in conjunction with statistical analysis of Manhattan WWTP data to discern what operational factors have the most significant impact on the presence or absence of filament-induced foaming, and to develop a probability model that allows operators to predict the probability of foaming given operating parameters. Current microscopy suggests the observed filaments (primarily Nocardioforms, Nostocoida limicola II, and Type 1851) are caused by a combination of oil and grease, volatile fatty acids, low F/M ratios, and high SRT conditions. Two probability models were developed, and both showed that Temperature, SRT, F/M ratio, mixed liquor TSS, and mixed liquor VSS are all statistically significant predictors of foaming. Additionally, individual predictor logistic curves were prepared to help the plant staff determine operating regimes that allow them to keep the WWTP operating under a desired probability of foaming.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Activated sludge; Foam; Nocardia; Nocardioform; regression; solids retention time (SRT)

Document Type: Research Article

Publication date: 2011-01-01

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 These proceedings are not peer reviewed.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