ACID HEMICELLULOSE HYDROLYSATES - PHYSICAL TREATMENTS AND CONTINUOUS IMMOBILIZED-CELL FERMENTATIONS

被引：16

作者：

PEREGO, P ^{[1
]}

CONVERTI, A ^{[1
]}

ZILLI, M ^{[1
]}

DELBORGHI, M ^{[1
]}

机构：

[1] UNIV GENOA,INST CHEM ENGN SCI & TECHNOL,I-16145 GENOA,ITALY

来源：

BIOPROCESS ENGINEERING | 1994年 / 10卷 / 01期

关键词：

D O I：

10.1007/BF00373533

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Hardwood hemicellulose acid hydrolysates, enriched in pentoses through countercurrent operations, have been fermented by Pachysolen tannophilus NRRL Y2460 in batch reactors. In order to evaluate the effects of pentose as well as inhibitor concentrations on the overall ethanol yield, several materials have been used for the physical treatment of this hydrolysate: Fly ash, a mixture of ion-exchange resins, a porous material constituted by SiO2 and Al2O3 and a mixture of organic solvents. The best combination, consisting of an overliming pretreatment followed by a secondary treatment in a column filled with the Si-Al material, has assured an increase in ethanol concentration of 15%. Finally, the data of continuous fermentations of these hydrolysates in an immobilized-cell reactor are presented and discussed.

引用

页码：35 / 41

页数：7

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