November/December 2018 (Vol. 59, No. 10)

  • Scrubbing system (above) removes hydrogen sulfide, moisture and then siloxanes from the biogas prior to being used by the cogeneration engines. Pump trucks offload fats, oils and grease (FOG) into large storage containers (left). FOG is slowly injected into the digesters.

    Upgrading Treatment Plant To Energy Net Zero

    The City of Gresham, Oregon wastewater treatment plant generates about 10 percent more electricity than it needs via a combination of energy efficiency, codigestion and cogeneration, and a solar array.
    Gregg Hayward
    BioCycle November/December 2018, Vol. 59, No. 10, p. 36

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  • Sally Brown

    Connections: Carbon Intensity

    Sally Brown
    BioCycle November/December 2018, Vol. 59, No. 10, p. 39

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  • Munson Machinery’s Screen Classifying Cutter Model SCC-15

    Equipment News

    BioCycle November/December 2018, Vol. 59, No. 10, p. 40

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