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Title: Simultaneous saccharification and fermentation of lignocellulose: Process evaluation

Abstract

Simultaneous saccharification and fermentation (SSF) processes for producing ethanol from lignocellulose are capable of improved hydrolysis rates, yields, and product concentrations compared to separate hydrolysis and fermentation (SHF) systems, because the continuous removal of the sugars by the yeasts reduces the end-product inhibition of the enzyme complex. Recent experiments using Genencor 150L cellulase and mixed yeast cultures have produced yields and concentrations of ethanol from cellulose of 80% and 4.5% respectively. The mixed culture was employed because B. clausenii has the ability to ferment cellobiose (further reducing end-product inhibition), while the brewing yeast S. cerevisiae provides a robust ability to ferment the monomeric sugars. These experimental results are combined with a process model to evaluate the economics of the process and to investigate the effect of alternative processes, conditions, and organisms. 36 refs., 9 figs., 2 tabs.

Authors:
; ;
Publication Date:
Research Org.:
Solar Energy Research Inst., Golden, CO (USA)
OSTI Identifier:
6387559
Report Number(s):
SERI/TP-231-3161; CONF-870523-4
ON: DE87001194
DOE Contract Number:  
AC02-83CH10093
Resource Type:
Conference
Resource Relation:
Conference: 9. symposium on biotechnology for fuels and chemicals, Boulder, CO, USA, 5 May 1987; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; CELLULOSE; FERMENTATION; SACCHARIFICATION; ETHANOL; YIELDS; LIGNIN; WOOD; ALCOHOLS; BIOCONVERSION; CARBOHYDRATES; CHEMICAL REACTIONS; DECOMPOSITION; HYDROLYSIS; HYDROXY COMPOUNDS; LYSIS; ORGANIC COMPOUNDS; POLYSACCHARIDES; SACCHARIDES; SOLVOLYSIS; 140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989); 090222 - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989)

Citation Formats

Wright, J D, Wyman, C E, and Grohmann, K. Simultaneous saccharification and fermentation of lignocellulose: Process evaluation. United States: N. p., 1987. Web.
Wright, J D, Wyman, C E, & Grohmann, K. Simultaneous saccharification and fermentation of lignocellulose: Process evaluation. United States.
Wright, J D, Wyman, C E, and Grohmann, K. Wed . "Simultaneous saccharification and fermentation of lignocellulose: Process evaluation". United States.
@article{osti_6387559,
title = {Simultaneous saccharification and fermentation of lignocellulose: Process evaluation},
author = {Wright, J D and Wyman, C E and Grohmann, K},
abstractNote = {Simultaneous saccharification and fermentation (SSF) processes for producing ethanol from lignocellulose are capable of improved hydrolysis rates, yields, and product concentrations compared to separate hydrolysis and fermentation (SHF) systems, because the continuous removal of the sugars by the yeasts reduces the end-product inhibition of the enzyme complex. Recent experiments using Genencor 150L cellulase and mixed yeast cultures have produced yields and concentrations of ethanol from cellulose of 80% and 4.5% respectively. The mixed culture was employed because B. clausenii has the ability to ferment cellobiose (further reducing end-product inhibition), while the brewing yeast S. cerevisiae provides a robust ability to ferment the monomeric sugars. These experimental results are combined with a process model to evaluate the economics of the process and to investigate the effect of alternative processes, conditions, and organisms. 36 refs., 9 figs., 2 tabs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {7}
}

Conference:
Other availability
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