Abstract:
:Simultaneous isomerisation and fermentation (SIF) of xylose and simultaneous isomerisation and cofermentation (SICF) of a glucose/xylose mixture was carried out by Saccharomyces cerevisiae in the presence of xylose isomerase. The SIF of 50 g I(-1) xylose gave an ethanol concentration and metabolic yield of 7.5 g l(-1) and 0.36 g (g xylose consumed)(-1). These parameters improved to 13.4 g l(-1) and 0.40 respectively, when borate was added to the medium. The SICF of a mixture of 50 g l(-1) glucose and 50 g l(-1) xylose gave an ethanol concentration and metabolic yield of 29.8 g l(-1) and 0.42 respectively, in the presence of borate. Temperature modulation from 30 degrees C to 35 degrees C during fermentation further enhanced the above parameters to 39 g l(-1) and 0.45 respectively. The approach was extended to the bioconversion of sugars present in a real lignocellulose hydrolysate (peanut-shell hydrolysate) to ethanol, with a fairly good yield.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Chandrakant P,Bisaria VSdoi
10.1007/s002530050025subject
Has Abstractpub_date
2000-03-01 00:00:00pages
301-9issue
3eissn
0175-7598issn
1432-0614journal_volume
53pub_type
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