[Enlarge Image]

Wastewater Treatment Plant Expansion

Project included demolition of existing sludge facilities and clarifiers, constructing new sludge management facilities, clarifiers, expanding aerobic digestion, and a new aeration basin to provide biological nutrient removal

This work included designing the expansion to the Village’s existing wastewater treatment plant (WWTP) from 1.1 MGD to 2.2 MGD. Working with tight land constraints which included flood plain around the site to the south, west and east, and an existing residential subdivision to the north this project required utilizing the existing property and demolishing existing facilities to provide room for the proposed facilities and still maintain sewage treatment to meet permit limits. Reaching out to concerned environmental groups was a must, and enabled this plant to be the only NPDES discharge permit granted by the IEPA in 2004.

Construction began in January 2005 and was completed in December 2006. Construction included removing all four of the existing clarifiers and the existing sludge facilities, and the existing oxidation ditches, digesters, bar screen building and control building were incorporated into the new design. The existing chlorine contact tank was converted into an Ultra-Violet light disinfection system and the aerobic digester capacity was doubled with additional cells, and a new aeration basin was provided to increases treatment capacity and to provide nutrient removal of phosphorus and nitrogen. The contractor, JJ Henderson systematically worked through the project constructing the new facilities in available space, and performing demolition in stages to allow different phases of plant to come offline and back online as the new phases were completed.

Project Budget: $7.6 million
Final Project Cost: $7.8 million