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Syngas biomethanation process and anaerobic digestion system

  • US 9,567,247 B2
  • Filed: 03/14/2013
  • Issued: 02/14/2017
  • Est. Priority Date: 01/23/2012
  • Status: Active Grant
First Claim
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1. A process comprising steps of,a) producing a synthesis gas from pyrolysis of a feedstock;

  • b) producing a mixture of gasses in the headspace of an anaerobic digester;

    c) withdrawing a portion of the mixture of gasses from the headspace of the anaerobic digester;

    d) withdrawing a stream of digestate from the anaerobic digester;

    e) mixing the withdrawn portion of the mixture of gasses and the synthesis gas into the stream of digestate to produce a stream of digestate comprising the withdrawn portion of the mixture of gasses and the synthesis gas; and

    f) returning the stream of digestate comprising the withdrawn portion of the mixture of gasses and the synthesis gas to the anaerobic digester.

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