Skip to main content

Finding the Sweet Spot: Designing for Wet Weather Flows

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

The upgrade of two existing wastewater pumping stations owned by the Pequannock, Lincoln Park & Fairfield Sewerage Authority (Two Bridges) demonstrated the challenges faced when attempting to increase wet-weather capacity. Selecting equipment solely to meet wet-weather demands can result in unintended results when the facility operates under typical dry weatherconditions. Though both facilities convey raw sewage from separate sanitary sewer systems, flows during wet weather periods can exceed 5 times the average daily flows. Variable frequency controllers allow the flexibility for pumps to be operated well below their peak flow range. However, these operating points may not be desirable from the point of view of pump efficiency and reliability. Reduced efficiency and internal recirculation cavitation can be associated with operation at flows less than 50% of the pump Best Efficiency Point (BEP).

Keywords: Dry-pit submersible Pumps; Net Positive Suction Head (NPSH); Suction Energy; Suction Specific Speed; cavitation; internal recirculation; wet weather flows

Document Type: Research Article

DOI: https://doi.org/10.2175/193864711802764706

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 These proceedings are not peer reviewed.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
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