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    Municipal

    Case Studies

    Plant Replaces Modified Dewatering Centrifuges with Sludge Thickening Centrifuges

    CaseStudy-City-of-Wyoming-MI-THK350

    Location: City of Wyoming Clean Water Plant  |  Wyoming, Michigan
    Plant Size: 90 MGD
    Installation: 2019 (1) THK350 Sludge Thickener

    OPERATING DATA
    • Feed @ 0.6-1.2% TS
    • 240 gpm average
    • 95% capture
    • <1 lb/ton polymer, active
    • <0.12 kW/gpm
    • 6.5% TS TWAS

    PROBLEM

    Two aging Bird 5100 modified dewatering centrifuges were needed to thicken WAS sludge to a total flow of 240 gpm. Each of the older Bird centrifuges operated at 80 kWh with a flow of 120 gpm. The large, accelerated mass and the relatively low flow rate of each unit were the primary sources for the plant’s high power consumption.

    RESULTS

    • Installation of one THK350 replaced two large Bird 5100 centrifuges
    • Awarded an energy reduction grant due to the 75% power reduction, saving up to $88,300/yr ($0.08 kW/h)
    • Solids discharge controlled for either off-site or land application via the patented hydro-pneumatic air which further fine-tunes the sludge control
      • 3.5-4.5% TS for off-site pumping
      • 5.5-6.5% TS for land application

    CaseStudy-City-of-Wyoming-MI-THK350-Chart

     

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