February 2019 (Vol. 60, No. 2)

  • BioCycle February 2019

    Cover: BioCycle February 2019

    The Midtfyn biogas plant in Ringe, Denmark processes 360,000 tons/year of manure and food waste. Upgraded biogas is injected into the natural gas grid.

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  • Nora Goldstein, Editor, BioCycle

    Editorial: Essential Components

    Nora Goldstein
    BioCycle February 2019, Vol. 60 No. 2, p. 4

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  • BioCycle WEST COAST19 Conference

    BioCycle World

    BioCycle February 2019, Vol. 60 No. 2, p. 9

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  • Current use of backyard composting in Vermont

    Composting Roundup

    BioCycle February 2019, Vol. 60 No. 2, p. 12

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  • Rio de Janeiro City Company of Urban Cleaning's pilot anaerobic digestion plant.

    Anaerobic Digest

    BioCycle February 2019, Vol. 60 No. 2, p. 14

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  • compost microbes

    Composting And Microbial Inoculants

    Adding microbial inoculants to improve temperature gain in a compost pile is examined.
    Craig Coker
    BioCycle February 2019, Vol. 60 No. 2, p. 16

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  • Biogas became a political priority in Denmark as a means to control agricultural waste management problems and provide a flexible renewable energy product. (Photo on left, taken at Nature Energy Månsson biogas plant in Brande.) Receiving hall for deep litter (non-liquid manure) at the Midtfyn Biogas Plant (right).

    Deep Dive Into Danish Biogas

    The state of biogas in Denmark has been driven by economies of scale, standardized designs, buy-in from farmers and, not least, strong, bipartisan policy support.
    Louise Hansen, Robert Spencer and Tony Barbagallo
    BioCycle February 2019, Vol. 60 No. 2, p. 20

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  • The AD facility at Aarhus University, built by Xergi in 2007, is scaling up to manage 85,000 tons/year of mixed organics.

    Biogas Research And Development In Denmark

    An important factor in developing new technologies at the university is the link to private companies able to commercialize and bring them to market.
    Claus Mortensen and Ole Trudslev
    BioCycle February 2019, Vol. 60 No. 2, p. 26

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  • Trucks, each carrying 9,000 gallons of manure, connect to massive pumps and point source odor control equipment to offload into holding tanks. The trucks are cleaned and washed, then reloaded with liquid digestate.

    Something Is Very Right In Denmark

    A California Energy Commission policy advisor assesses applicability of Danish renewable gas infrastructure and economics to achieving the state’s greenhouse gas reduction goals.
    Tim Olson
    BioCycle February 2019, Vol. 60 No. 2, p. 29

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  • Sally Brown

    Connections: Stink

    Sally Brown
    BioCycle February 2019, Vol. 60 No. 2, p. 31

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