Skip to main content

Using Predictive Modeling Tools and Temporary Treatment Methods to Meet Effluent Limits During Construction Outages: Pulling Out all of the Stops

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The Morris Forman Wastewater Treatment Plant (MFWTP) is the largest wastewater plant in the Louisville & Jefferson County Metropolitan Sewer District (MSD) system. The original plant, a primary treatment facility, was constructed in the 1950s and the secondary system was added in the 1970s. Recent improvements have included the addition of bio-roughing towers, conversion to a sodium hypochlorite disinfection system, and installation of a dechlorination system.

In 1996, the MSD entered into a capital improvement program to replace aging facilities at the MFWTP and several of the projects had the potential of reducing treatment capacity during construction. Most notably, replacement of the aeration equipment in the high purity oxygen (HPO) reactors reduced the secondary treatment capacity of the plant by 40% for over a year. In order to minimize the impact to the receiving stream, the Ohio River, a plan of operations was developed and presented to the Kentucky Division of Water (KDOW). The plan predicted the impact of construction outages on effluent quality and recommended short term improvements that could be implemented, reducing the impact of construction. In order to quantify the impacts, a treatment process model, PRO2D, was used to develop an overall plant mass balance and predict the performance of all unit processes and plant effluent based on the influent characteristics, tank sizes, and equipment sizes.

Several approaches were used to minimize construction impacts. Since replacement of the aeration equipment in the HPO reactors would have the greatest impact on treatment capacity, particular attention was paid to construction sequencing. The initial construction could begin with only 20% of the secondary treatment system taken out of service. Operating the plant with reduced disruption allowed the contractor to develop a “learning curve” for performance of the work and also allowed the MSD to calibrate the PRO2D model for the plant and develop a comfort level for using the model as an operational tool.

The model was useful for developing process control criteria and was also able to predict conditions where we expected non-compliance with established effluent limits. When it was predicted that effluent limits could not be met under existing conditions, that the Kentucky DOW was notified and additional temporary treatment technologies were employed to minimize the excursions.
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: 2001-01-01

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