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Method and apparatus for membrane-based, two-stage gas production from solid biomaterials

  • US 8,343,749 B2
  • Filed: 01/10/2012
  • Issued: 01/01/2013
  • Est. Priority Date: 01/23/2007
  • Status: Active Grant
First Claim
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1. A method for producing gas from a biomaterial comprising the steps of:

  • fermenting the biomaterial using anaerobic hydrolysis-fermentation;

    photofermentating;

    removing the gas;

    maintaining a pH during at least one stage of the method;

    the anaerobic hydrolysis-fermentation and the photofermentating take place in a single vessel comprising a multi-stage reactor and a gas-specific membrane;

    the multi-stage reactor comprising at least one leach-bed reactor and at least one suspended-growth reactor, the suspended-growth reactor in fluid communication with the leach-bed reactor; and

    the single vessel comprising a plurality of tubes, wherein a portion of the tubes divide the leach-bed reactor from the suspended-growth reactor within the single vessel, and an annular space between the tubes dividing the leach-bed reactor from the suspended-growth reactor.

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