Production of ethanol from wet oxidised wheat straw by Thermoanaerobacter mathranii

被引:55
作者
Ahring, BK
Licht, D
Schmidt, AS
Sommer, P
Thomsen, AB
机构
[1] Tech Univ Denmark, Dept Environm Sci & Engn, DK-2800 Lyngby, Denmark
[2] Riso Natl Lab, Plant Biol & Biogeochem Dept, DK-4000 Roskilde, Denmark
关键词
pretreatment; wet oxidation; hemicellulose hydrolysate; D-xylose; furfural formation; Thermoanaerobacter mathranii;
D O I
10.1016/S0960-8524(98)00077-7
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The wet oxidation process (water, oxygen, elevated temperature, sodium carbonate) was investigated as a means of solubilising hemicellulose from wheat straw. Sixteen different combinations of oxygen pressure and sodium carbonate concentration were applied. The hemicellulose hydrolysates were evaluated with respect to total sugars, xylose, and 2-furfural produced. The concentration of sugars tended to be highest in hydrolysates produced at high oxygen pressures, whereas the concentration of 2-furfural was lowest in hydrolysates produced at low oxygen pressures and high carbonate concentrations. Fermentation of the hydrolysates was carried out using Thermoanaerobacter mathranii strain A3M1. No significant inhibitory effect was observed when the hydrolysates were fermented by T. mathranii A3M1. However, the solubilised hemicellulose was only partly available for fermentation by the bacteria. Treatment with the commercial enzyme Celluclast(R) or with acid hydrolysis improved the ethanol yield from the hydrolysates. Treatment with Pentopan(TH) Mono BG or Pulpzyme(R) HC, both endo-1,4-beta-xylanases, had no effect neither had co-cultivation with the xylanase-producing Dictyoglomus B4. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:3 / 9
页数:7
相关论文
共 30 条
[1]   Pretreatment of wheat straw and conversion of xylose and xylan to ethanol by thermophilic anaerobic bacteria [J].
Ahring, BK ;
Jensen, K ;
Nielsen, P ;
Bjerre, AB ;
Schmidt, AS .
BIORESOURCE TECHNOLOGY, 1996, 58 (02) :107-113
[2]  
AHRING BK, 1996, P 9 EUR BIOEN C, V1, P362
[3]   EFFECTS OF LIPIDS ON THERMOPHILIC ANAEROBIC-DIGESTION AND REDUCTION OF LIPID INHIBITION UPON ADDITION OF BENTONITE [J].
ANGELIDAKI, I ;
PETERSEN, SP ;
AHRING, BK .
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY, 1990, 33 (04) :469-472
[4]   MICROBIAL XYLANOLYTIC SYSTEMS [J].
BIELY, P .
TRENDS IN BIOTECHNOLOGY, 1985, 3 (11) :286-290
[5]   THERMAL-DECOMPOSITION OF DILUTE AQUEOUS FORMIC-ACID SOLUTIONS [J].
BJERRE, AB ;
SORENSEN, E .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1992, 31 (06) :1574-1577
[6]  
Bjerre AB, 1996, BIOTECHNOL BIOENG, V49, P568, DOI 10.1002/(SICI)1097-0290(19960305)49:5<568::AID-BIT10>3.3.CO
[7]  
2-4
[8]  
BJERRE AB, 1996, RISOR855EN RIS NAT L, P38
[9]  
ERIKSON KE, 1994, MICROBIAL ENZYMATICA, P182
[10]  
Fengel D., 1989, WOOD CHEM ULTRASTRUC