Bowling Green Municipal Utilities (BGMU) sought the renovation and expansion of its existing wastewater treatment plant to a 15-mgd wastewater treatment facility. Objectives for the project included:

  • Design of a wastewater treatment plant that could meet existing and future effluent requirements, including removal of total nitrogen and phosphorus;
  • Assessment of sustainable and cost effective solutions for biosolids handling and disposal, and;
  • Construction of an operator-friendly facility.


Bowling Green Municipal Utilities


Bowling Green, Kentucky

Project Type




Gresham Smith’s engineers and design team addressed each of BGMU’s objectives by designing a 15-mgd sequencing batch reactor to replace their existing aerated biotower facility. Services included preliminary engineering, permitting, fund procurement assistance, design and construction administration.

The renovated and expanded wastewater treatment facility includes a new influent pump station, odor control, septage receiving station, high efficiency turbo-compressor blowers, ultraviolet disinfection, and dewatering centrifuges. An indirect thermal dryer was designed to convert dewatered biosolids into 12.5 dry tons per day of a sustainable Class A product that will be used in agriculture as a supplemental fertilizer. The thermal dryer process reduces BGMU’s residuals management cost by approximately 30-percent per dry ton. Updated instrumentation and controls will allow the operators to remotely monitor and control the operation of the facility using real-time data response.


The new plant houses the largest sequential batch reactor in the United States
and can provide more efficient processing for higher volumes.

The new plant houses the largest sequential batch reactor in the United States

Project Contact

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Craig Parker, P.E., ENV SP
Craig Parker, P.E., ENV SP
Senior Vice President