Skip to main content


Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

The City of Rocky Mount, North Carolina operates the 21-million gallon per day pure oxygen activated sludge Tar River Regional Wastewater Treatment Plant (TTRWWPT). Residuals resulting from the activated sludge treatment process are currently thickened by dissolved air floatation and aerobically digested for stabilization to 40 CFR 503 “Class B” levels prior to liquid land application under a state issued non-discharge residuals application permit.

Future land application permit modifications are expected to bring about significant changes in the day-to-day operation of the liquid land application program by further restricting liquid biosolids land application on currently permitted sites. These restrictions are anticipated to include more stringent limits on sites with high seasonal groundwater tables, incorporate seasonal restrictions based on crop coverage and active growing season, and include potentially lower allowable plant available nitrogen (PAN) loading rates. These restrictions, individually or in combination, will severely limit land application during the November to March period based on the currently permitted application sites. To accommodate these contingencies, if the Class B liquid land application program were continued, additional liquid sludge storage volume would be required at the treatment facility to handle extended seasonal application restrictions.

Due to the capital and operating costs associated with the additional long-term aerated storage volume the City of Rocky Mount initiated a study to examine the lifecycle costs associated with other long-term biosolids management approaches and to develop a step-wise approach to systematically address the potential regulatory changes. Detailed results of the lifecycle cost analysis and long-term biosolids management study are shared in this case study comparing a wide range of biosolids management alternatives. Furthermore, this case study clearly demonstrates the methodology used to incorporate lifecycle cost analysis into both short-term and long-term biosolids management process decision making for a municipal wastewater treatment utility.
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: 2005-01-01

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