Skip to main content

Characterisation of Grit to Develop an Integrated Plant Solution

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

The Hampton Roads Sanitation District (HRSD) desired to improve the performance of two identical forced vortex grit systems at two separate wastewater treatment plants (WWTP), the Chesapeake Elizabeth and the Nansemond Treatment Plants. The goal of the study was to use computational fluid dynamics (CFD) to identify the root inefficiencies of the vortex systems and find a baffle design to improve the grit removal efficiency. Nine baffle configurations were developed and modeled in an attempt to improve grit removal performance. The study concluded that CFD modeling was appropriate for this application, specific gravity is an important factor in removal efficiency, and considerable hydraulic and grit short circuiting is occurring in the vortex grit tank under all tested conditions. The modeling demonstrated that only marginal benefit can be expected from applying an optimized full entrance and exit baffle as defined by this study. The modeling revealed that grit is removed by Type 1 discrete particle settling velocity and not the vortex mechanism; therefore, surface overflow rate is the most important factor for grit removal.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2012-01-01

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 These proceedings are not peer reviewed.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