Process for conversion of mushroom lignocellulosic waste to useful byproducts
First Claim
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1. The present invention relates to a process for conversion of monocot lignocellulosic grasses used in the growth of mushrooms into byproducts which comprises:
- (a) growing and harvesting edible mushrooms in a grass so that lignins are degraded, wherein a liquid and a solid as byproducts are produced from the growth of the mushrooms;
(b) separating the liquid which is water soluble from the solids, wherein the liquid comprises enzymes and degraded lignin produced during the growth of the mushrooms on the grass;
(c) treating the solid separated from the liquid with an AFEX process using pressurized hot liquid ammonia which is rapidly depressurized to release the ammonia treated solid as the byproduct;
(d) optionally treating the ammonia treated solid as the byproduct with the glucans from step (c) with a cellulase and β
-glucosidase enzyme mixture to produce sugars; and
(e) optionally fermenting the sugars to step (d) to produce ethanol and other chemicals.
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Abstract
A process for the conversion of monocot lignocellulosic grass waste from mushroom growth into byproducts is described. In particular, the present invention releases glucans from the waste which can be easily hydrolyzed, after a less severe thermochemical process (i.e. AFEX), and into sugars for producing ethanol or other by-products by fermentation.
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12 Claims
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1. The present invention relates to a process for conversion of monocot lignocellulosic grasses used in the growth of mushrooms into byproducts which comprises:
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(a) growing and harvesting edible mushrooms in a grass so that lignins are degraded, wherein a liquid and a solid as byproducts are produced from the growth of the mushrooms;
(b) separating the liquid which is water soluble from the solids, wherein the liquid comprises enzymes and degraded lignin produced during the growth of the mushrooms on the grass;
(c) treating the solid separated from the liquid with an AFEX process using pressurized hot liquid ammonia which is rapidly depressurized to release the ammonia treated solid as the byproduct;
(d) optionally treating the ammonia treated solid as the byproduct with the glucans from step (c) with a cellulase and β
-glucosidase enzyme mixture to produce sugars; and
(e) optionally fermenting the sugars to step (d) to produce ethanol and other chemicals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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