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Non-pressurised pre-treatment, enzymatic hydrolysis and fermentation of waste fractions

  • US 9,914,944 B2
  • Filed: 09/29/2006
  • Issued: 03/13/2018
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
First Claim
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1. A method of sorting fermentable parts of unsorted municipal solid waste (MSW) from non-fermentable solids comprisingsubjecting unsorted MSW derived from households to non-pressurized thermal pretreatment, followed by enzymatic hydrolysis of said unsorted MSW so as to liquefy fermentable parts of the unsorted MSW and thereby produce liquefied fermentable parts of the unsorted MSW, followed bysorting of the liquefied fermentable parts of the unsorted MSW from non-fermentable solids,wherein the liquefied fermentable parts of the unsorted MSW are subsequently subjected to fermentation, andwherein the non-pressurized thermal pretreatment and enzymatic hydrolysis are carried out in a single vessel using free fall mixing to mechanically process the unsorted MSW.

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