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US 10,865,427 B2Granted
Process for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars
AssigneeDsm IP Assets B.V.
InventorsJohannes Petrus Smits, Elisabeth Maria Gierveld
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Abstract
The invention relates to a process for the preparation of a sugar and/or fermentation product from lignocellulosic material.
Claims16
A process for preparation of a sugar product from lignocellulosic material, comprising:
- a) optionally, pretreatment of the lignocellulosic material;
- b) optionally, washing of the optionally pretreated lignocellulosic material;
- c) fed-batch addition of the optionally washed and/or optionally pretreated lignocellulosic material to a first container that comprises an enzyme composition comprising at least two cellulases;
- d) enzymatic hydrolysis of the optionally washed and/or optionally pretreated lignocellulosic material in the first container using the enzyme composition comprising at least two cellulases to liquefy the lignocellulosic material;
- e) addition of the liquefied lignocellulosic material to a second container;
- f) enzymatic hydrolysis of the liquefied lignocellulosic material in the second container using an enzyme composition comprising at least two cellulases to obtain a sugar product;
- and
- g) optionally, recovery of the sugar product;
- wherein oxygen is added to the first and/or second container.
6 more elements
A process for preparation of a fermentation product from lignocellulosic material, comprising:
- a) optionally, pretreatment of the lignocellulosic material;
- b) optionally, washing of the optionally pretreated lignocellulosic material;
- c) fed-batch addition of the optionally washed and/or optionally pretreated lignocellulosic material to a first container that comprises an enzyme composition comprising at least two cellulases;
- d) enzymatic hydrolysis of the optionally washed and/or optionally pretreated lignocellulosic material in the first container using the enzyme composition comprising at least two cellulases to liquefy the lignocellulosic material;
- e) addition of the liquefied lignocellulosic material to a second container;
- f) enzymatic hydrolysis of the liquefied lignocellulosic material in the second container using an enzyme composition comprising at least two cellulases to obtain a hydrolysed lignocellulosic material;
- g) optionally, recovery of the hydrolysed lignocellulosic material;
- h) fermentation of the hydrolysed lignocellulosic material to produce a fermentation product;
- and
- i) optionally, recovery of the fermentation product;
- wherein oxygen is added to the first and/or second container.
8 more elements
Dependencies are inferred from the claim text.