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Semi-continuous co-digestion of solid slaughterhouse waste, manure, and fruit and vegetable waste

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  • Alvarez, René
  • Lidén, Gunnar

Abstract

The potential of semi-continuous mesophilic anaerobic digestion (AD) for the treatment of solid slaughterhouse waste, fruit-vegetable wastes, and manure in a co-digestion process has been experimentally evaluated. A study was made at laboratory scale using four 2L reactors working semi-continuously at 35°C. The effect of the organic loading rate (OLR) was initially examined (using equal proportion of the three components on a volatile solids, VS, basis). Anaerobic co-digestion with OLRs in the range 0.3–1.3kgVSm−3d−1 resulted in methane yields of 0.3m3kg−1VS added, with a methane content in the biogas of 54–56%. However, at a further increased loading, the biogas production decreased and there was a reduction in the methane yield indicating organic overload or insufficient buffering capacity in the digester.

Suggested Citation

  • Alvarez, René & Lidén, Gunnar, 2008. "Semi-continuous co-digestion of solid slaughterhouse waste, manure, and fruit and vegetable waste," Renewable Energy, Elsevier, vol. 33(4), pages 726-734.
    • Handle: RePEc:eee:renene:v:33:y:2008:i:4:p:726-734
    DOI: 10.1016/j.renene.2007.05.001
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    References listed on IDEAS

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    1. Hedegaard, Mogens & Jaensch, Volker, 1999. "Anaerobic co-digestion of urban and rural wastes," Renewable Energy, Elsevier, vol. 16(1), pages 1064-1069.
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