• The Hengelo, Netherlands plant employs a continuous plug-flow anaerobic digester integrated into a larger composting operation. The digester, supplied by Organic Waste Systems, processes one-quarter of incoming feedstock on a half-acre footprint at the facility. Photo courtesy of OWS

    Integrating Anaerobic Digestion With Composting

    Which is better for managing source separated organics, anaerobic digestion or aerobic composting? “It’s not an either-or proposition,” suggest the authors.
    Tom Kraemer and Scott Gamble
    BioCycle November 2014, Vol. 55, No. 10, p. 32

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  • All food waste is unloaded in a ClearSpan fabric building to reduce storm water impacts on waste receiving and mixing operations. Among special loads of food waste processed was the 800-pound butter sculpture from the New York State Fair (inset).

    Smooth Transition To Food Waste Composting

    Regional waste authority in New York State switches to extended aerated static piles in bunkers to manage food waste at existing yard trimmings composting facility.
    Claire Siegrist
    BioCycle November 2014, Vol. 55, No. 10, p. 20

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  • Material assessments are integral to identifying all recyclables, landfill-bound waste and compostable organics. The value and composition of each material is broken down in detail in order to optimize recovery and reduce costs.

    Training The Zero Waste Workforce

    Community Environmental Services, part of Portland State University, trains and employs students to offer zero waste management services to companies, institutions and public agencies.
    Neil Seldman
    BioCycle November 2014, Vol. 55, No. 10, p. 37

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  • Figure 6. Stratified air management

    Cost-Effective Odor Control

    Technical Advisor on odor from England’s Environment Agency discusses odor pollution control options for organics recycling facilities in the context of business planning, management and abatement.
    Nick Sauer
    BioCycle November 2014, Vol. 55, No. 10, p. 25

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  • Ground green waste is mixed with food waste and loaded into 30 cubic yard modified drop boxes where aeration piping is laid in the bottom (left). After 30 days in the container, material is moved into the windrow composting process (right).

    Growing Composting Site At County Landfill

    Deschutes Recycling expanded its yard trimmings composting operation to include commercial food waste. Produce from garden at the facility is donated to local food bank.
    Dan Emerson
    BioCycle November 2014, Vol. 55, No. 10, p. 40

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  • Figure 2. Overall amount of methane collected versus emitted annually for the U.S.

    Quantifying Landfill Biogas Production Potential In The U.S.

    New study estimates that volume of landfill-derived methane in U.S. is 466 billion cubic feet per year, of which 66 percent is collected and only 58 percent is utilized.
    A.E. Schauer-Gimenez, A.J. Cal, M-C. Morse, A.J. Pieja, K.M. Holtman and W.J. Orts
    BioCycle November 2014, Vol. 55, No. 10, p. 43

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  • Delivery trucks unload feedstocks, sourced from a 60-mile radius of the plant, inside the receiving and preprocessing building. Solids are moved via an automatic crane (inset).

    Utility Powers Up Anaerobic Digester

    Hometown BioEnergy, LLC, a subsidiary of the Minnesota Municipal Power Agency, has capacity to produce 8 MW of electricity at its anaerobic digestion plant.
    Dan Emerson
    BioCycle November 2014, Vol. 55, No. 10, p. 48

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  • Sally Brown

    Connections: Dirt Cheap

    Sally Brown
    BioCycle November 2014, Vol. 55, No. 10, p. 54

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  • Natural Systems Utilities' demonstration trailer featuring two digester reactors.

    Equipment News

    BioCycle November 2014, Vol. 55, No. 10, p. 56

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  • Microsoft’s Data Plant is powered by a fuel cell fueled by biogas from an anaerobic digester.

    Anaerobic Digest

    BioCycle November 2014, Vol. 55, No. 10, p. 16

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