Process for producing ethanol

Patent · Tue Jul 27 04:00:00 EDT 1993

OSTI ID:6364357

Lantero, O J; Fish, J J

A process is described for producing ethanol from raw materials containing a high dry solid mash level having fermentable sugars or constituents which can be converted into sugars, comprising the steps of: (a) liquefaction of the raw materials in the presence of an alpha amylase to obtain liquefied mash; (b) saccharification of the liquefied mash in the presence of a glucoamylase to obtain hydrolysed starch and sugars; (c) fermentation of the hydrolysed starch and sugars by yeast to obtain ethanol; and (d) recovering the obtained ethanol, wherein an acid fungal protease is introduced to the liquefied mash during the saccharification and/or to the hydrolysed starch and sugars during the fermentation, thereby increasing the rate of production of ethanol as compared to a substantially similar process conducted without the introduction of the protease.

• Assignee: Solvay Enzymes, Inc., Elkhart, IN (United States)
• Patent Number(s): US 5231017; A
• Application Number: PPN: US 7-701871
• OSTI ID: 6364357
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090900* -- Biomass Fuels-- Processing-- (1990-)
ALCOHOLS
AMYLASE
BIOCONVERSION
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
ENZYMATIC HYDROLYSIS
ENZYMES
ETHANOL
EUMYCOTA
FERMENTATION
FUNGI
GLYCOSYL HYDROLASES
HYDROLASES
HYDROLYSIS
HYDROXY COMPOUNDS
LIQUEFACTION
LYSIS
MATERIALS
MICROORGANISMS
O-GLYCOSYL HYDROLASES
OPTIMIZATION
ORGANIC COMPOUNDS
PLANTS
POLYSACCHARIDES
PRODUCTIVITY
PROTEINS
RAW MATERIALS
REAGENTS
SACCHARIDES
SACCHARIFICATION
SOLVOLYSIS
STARCH
SYNTHESIS
THERMOCHEMICAL PROCESSES
YEASTS