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Hydrothermal carbonization of kitchen waste

Author

Listed:
  • J. Malaťák

    (Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • T. Dlabaja

    (Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic)

Abstract

Hydrothermal carbonization is a suitable method for energy and material recovery of wet heterogeneous kitchen waste. The paper examines the ability of the process to produce stable, energy-rich material without harmful by-products from lunch leftovers, raw potatoes, creamy yogurt and raw onions. Results of the batch experiments confirm the hypothesis that waste processing results in homogenous energy-rich (> 24 MJ/kg) and carbon-rich (> 63 % wt.) material. The biochar of creamy yogurt reaches the highest lower-heating value of 31.75 MJ/kg. In terms of energy use and emission concentrations, all samples meet legal requirements for incineration in combustion devices. Phytotoxicity tests prove the harmlessness of the liquid by-product for agricultural purposes.

Suggested Citation

  • J. Malaťák & T. Dlabaja, 2016. "Hydrothermal carbonization of kitchen waste," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 62(2), pages 64-72.
    • Handle: RePEc:caa:jnlrae:v:62:y:2016:i:2:id:34-2014-rae
    DOI: 10.17221/34/2014-RAE
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    References listed on IDEAS

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    1. J. Malaťák & L. Passian, 2011. "Heat-emission analysis of small combustion equipments for biomass," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 57(2), pages 37-50.
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