Skip to main content

South West Water (Cornborough WWTP) Automatic Sludge Age Control Benefits

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

South West Water's (SWW) Cornborough WWTP (UK) is a coastal wastewater treatment plant and sludge reception center serving the area around Bideford in Devon-UK. Black & Veatch Corp constructed Cornborough WWTP during 2001/2, subsequently going on line during the winter of 2002.

Cornborough is located in an area subject to significant population increases during the summer months as tourists flock to the beaches and holiday resorts located along the south west coast of the UK. This situation leads to significant increases in both diurnal solids variations and short-term shock loading incidents at vacation time. The combined impact of a rapid but short-term growth in population and a steady reduction in rainfall during the summer months is a quadrupling of solids loading on Cornborough WWTP. The challenge for Cornborough was to maintain plant compliance at all times without recourse to additional manpower or unplanned capital expenditure. Stabilising F: M (food: mass) based on a strategy of maintaining a constant SRT (Sludge Retention Time) via automation of the solids wasting process and using continuously online total suspended solids as the primary control input provided a solution to the challenge.

The Challenge

Any WWTP plant experiencing large changes in plant loadings would require an experienced and diligent team to operate the plant in such a way as to maintain compliance. This has proved both expensive and time consuming, with little leeway for error. Significant numbers of plants have traditionally used a strategy based on constant MLSS, as this is significantly easier for operators to understand and less open to human error effects. Unfortunately SWW Cornborough experiences significant loading variations rendering such a strategy ineffective. An alternative solution based upon automatic calculation of SRT linked to automatic wasting as the principle control philosophy for maintaining the plant's optimum SRT was investigated. Like most WWTP's, Cornborough's sludge holding facilities are not infinite, any automatic wasting control system would be required to work around and overcome any such limitations without the need for human intervention.

Figure 1 summarizes how the switch-over from manual to automatic wasting resulted in the immediate control of SRT. This was achieved with the SRT controller steadfastly working towards the optimum SRT set point, despite plant loading increasing at the end of April 2003.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2004-01-01

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