Skip to main content

Stakeholder Involvement Improves System Optimization

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Optimization techniques using genetic algorithms, simulated annealing, and linear programming can help identify cost effective collection system improvements on a regional scale. Although these techniques will arrive at an optimized set of system improvements, they often lack the ability to incorporate real world knowledge into the objective functions, therefore producing the potential for unrealistic solutions. As a result, an optimized solution set (using linear programming for example) will often be modified in the end to accommodate real world issues such as public opposition, utility conflicts, environmental impacts, and political considerations (i.e., balancing competing needs), to name a few.

This paper presents an optimization study developed for the Racine Wastewater Utility (Utility), which incorporates stakeholder involvement in the optimization process to address real world issues as they arose. This process led to an optimized and realistic system-wide solution. This paper will focus on the optimization techniques used, and will describe how stakeholder involvement was critical to the study's successful outcome.

In Racine, recent wet weather events have produced system-wide basement backups and bypassing. As a result, the Utility developed a System Optimization Plan to mitigate these issues, which incorporated monthly Technical Advisory Committee (TAC) meetings into the planning process. The TAC, consisting of technical representatives from the ten (10) satellite communities, provided the Utility with input into the process, reviewed the results as they were completed, and provided real world information necessary to develop an optimized and realistic set of solutions.

System optimization was achieved by modeling the Utility's interceptor system, using the collection system model MIKE URBAN. This model was extensively calibrated prior to evaluating alternatives, which included using the model's RDII and RTC modules and the Scenario Manager. Eliminating basement backups and system bypassing were defined as the evaluation / optimization criteria, as well as reducing peak wet weather flow at the wastewater treatment plant (WWTP) sufficient to meet a flow threshold of 231 MGD. The optimized solution consisted of a combination of storage and conveyance measures which best met the evaluation criteria: 1) the lowest unit cost for total bypass elimination (*/gallon removed); 2) the lowest unit cost for system-wide surcharge reduction (expressed as a system-wide average surcharge); and 3) the lowest total cost to meet a flow threshold at the WWTP.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: Optimization; RTC; calibration; modeling; stakeholder

Document Type: Research Article

Publication date: 01 January 2010

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