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Process for producing a fuel from lignocellulosic feedstock

  • US 10,202,312 B2
  • Filed: 03/01/2016
  • Issued: 02/12/2019
  • Est. Priority Date: 03/05/2012
  • Status: Active Grant
First Claim
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1. A process for producing a fuel from lignocellulosic feedstock, said fuel comprising ethanol, said process comprising:

  • (i) treating the lignocellulosic feedstock to produce sugar;

    (ii) fermenting the sugar to produce a fermented mixture comprising the ethanol;

    (iii) recovering the ethanol from the fermented mixture in one or more stages to produce a concentrated ethanol and still bottoms;

    (iv) recovering the still bottoms, said still bottoms comprising an organic component and an inorganic component; and

    (v) applying the still bottoms comprising the organic component and the inorganic component to land as a soil conditioner,wherein applying the still bottoms to the land returns at least one member selected from the group consisting of organic matter and nutrients back to the land.

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