TY - JOUR
T1 - Sweet Sorghum as Feedstock for Ethanol Production: Enzymatic Hydrolysis of Steam-Pretreated Bagasse
AU - Sipos, Bálint
AU - Réczey, Jutka
AU - Somorai, Zsolt
AU - Kádár, Zsófia
AU - Dienes, Dóra
AU - Réczey, Kati
PY - 2009
Y1 - 2009
N2 - Sweet sorghum is an attractive feedstock for ethanol production. The juice
extracted from the fresh stem is composed of sucrose, glucose, and fructose and can
therefore be readily fermented to alcohol. The solid fraction left behind, the so-called
bagasse, is a lignocellulosic residue which can also be processed to ethanol. The objective
of our work was to test sweet sorghum, the whole crop, as a potential raw material of
ethanol production, i.e., both the extracted sugar juice and the residual bagasse were tested.
The juice was investigated at different harvesting dates for sugar content. Fermentability of
juices extracted from the stem with and without leaves was compared. Sweet sorghum
bagasse was steam-pretreated using various pretreatment conditions (temperatures and
residence times). Efficiency of pretreatments was characterized by the degree of cellulose
hydrolysis of the whole pretreated slurry and the separated fiber fraction. Two settings of
the studied conditions (190 °C, 10 min and 200 °C, 5 min) were found to be efficient to
reach conversion of 85–90%.
AB - Sweet sorghum is an attractive feedstock for ethanol production. The juice
extracted from the fresh stem is composed of sucrose, glucose, and fructose and can
therefore be readily fermented to alcohol. The solid fraction left behind, the so-called
bagasse, is a lignocellulosic residue which can also be processed to ethanol. The objective
of our work was to test sweet sorghum, the whole crop, as a potential raw material of
ethanol production, i.e., both the extracted sugar juice and the residual bagasse were tested.
The juice was investigated at different harvesting dates for sugar content. Fermentability of
juices extracted from the stem with and without leaves was compared. Sweet sorghum
bagasse was steam-pretreated using various pretreatment conditions (temperatures and
residence times). Efficiency of pretreatments was characterized by the degree of cellulose
hydrolysis of the whole pretreated slurry and the separated fiber fraction. Two settings of
the studied conditions (190 °C, 10 min and 200 °C, 5 min) were found to be efficient to
reach conversion of 85–90%.
U2 - 10.1007/s12010-008-8423-9
DO - 10.1007/s12010-008-8423-9
M3 - Journal article
SN - 0273-2289
VL - 153
SP - 151
EP - 162
JO - Applied Biochemistry and Biotechnology
JF - Applied Biochemistry and Biotechnology
ER -