Organic waste biodegradability test bio methane potential method

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Courtesy of Cambi AS

Management Summary

  • The biogas production from a mixture of food waste, garden waste, paper, napkins, plastic, metals and glass and anaerobically digested sludge was monitored until gas production had ceased.
  • The homogenised biowaste mixture was subjected to two pre-treatment methods prior to being fed to the BMP reactors, these were:
    • pasteurisation at 70oC followed by anaerobic digestion at 55 oC ,and;
    • thermal hydrolysis for 20 minutes followed by anaerobic digestion at 40 oC.
  • The average methane yield in litres produced per kilogram of volatile solids fed was 106 for the rigs fed with pasteurised waste and 276 litres for the thermally hydrolysed reactors.
  • A longer more detailed study whereby bench scale mesophilic anaerobic digesters are fed on a daily basis would be required to accurately determine additional parameters including volatile solids destruction levels and whether or not toxicity is likely to be an issue.

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