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History of the Greater Mentor Sewer District

    The original Greater Mentor Wastewater Treatment Facility was constructed in 1964 as part of an extensive sewerage improvement by Lake County in the rapidly developing Mentor service area.  The facility was designed as a primary treatment plant, with chemical coagulation of the wastewater, to treat a design flow of 4 million gallons per day (MGD).  The sludge produced at the facility was anaerobically digested and dewatered using vacuum filtration.

     

    In 1973, the facility was expanded to an 8 MGD activated sludge plant with a maximum hydraulic design flow of 20 MGD, which included 6 aeration tanks, 3 final settling tanks and an activated sludge dewatering process.

     

    In 1986, the facility was upgraded to a 14.2 MGD activated sludge plant with a hydraulic capacity of 55 MGD.  Equalization basins were added to provide storage of flows above the design rate of 14.2 MGD.  Four additional primary settling tanks were added to provide adequate detention time for settling.  Two more final settling tanks were then added along with trickling filters, enhanced sludge dewatering processes for anaerobic and waste activated sludge, and composting.

     


    In 2000, the facility was upgraded to a 20 MGD activated sludge plant with a peak design flow rate of 32 MGD and a hydraulic capacity of 55 MGD.  The expansion included: new influent pumps, 3 additional aeration basins, 4 new final settling tanks, new flow equalization facilities, odor control processes and modifications to the compost process, sludge holding, improved sludge dewatering processes and stand-by generators to provide power to the facility in the event of any power outage.

     The GLKWRF provides service for the residents and businesses of Mentor, Grand River, Fairport Harbor, Mentor-on-the-Lake, Concord Township and portions of Painesville Township and Kirtland.  The facility discharges safe and clean water back to Lake Erie.