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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Isolation and characterisation of lactic acid bacterium for effective fermentation of cellobiose into optically pure homo l-(+)-lactic acid
Applied Microbiology and Biotechnology, Volume 89, No. 4, Year 2011
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Description
Effective utilisation of cellulosic biomasses for economical lactic acid production requires a microorganism with potential ability to utilise efficiently its major components, glucose and cellobiose. Amongst 631 strains isolated from different environmental samples, strain QU 25 produced high yields of l-(+)-lactic acid of high optical purity from cellobiose. The QU 25 strain was identified as Enterococcus mundtii based on its sugar fermentation pattern and 16S rDNA sequence. The production of lactate by fermentation was optimised for the E. mundtii QU25 strain. The optimal pH and temperature for batch culturing were found to be 7.0°C and 43°C, respectively. E. mundtii QU 25 was able to metabolise a mixture of glucose and cellobiose simultaneously without apparent carbon catabolite repression. Moreover, under the optimised culture conditions, production of optically pure l-lactic acid (99.9%) increased with increasing cellobiose concentrations. This indicates that E. mundtii QU 25 is a potential candidate for effective lactic acid production from cellulosic hydrolysate materials. © 2011 Springer-Verlag.
Authors & Co-Authors
Abdel-Rahman, Mohamed Ali
Japan, Fukuoka
Kyushu University
Egypt, Cairo
Al-azhar University
Tashiro, Yukihiro
Japan, Kitakyushu
Seinan jo Gakuin University
Zendo, Takeshi
Japan, Fukuoka
Kyushu University
Shibata, Keisuke
Japan, Fukuoka
Kyushu University
Sonomoto, Kenji
Japan, Fukuoka
Kyushu University
Statistics
Citations: 67
Authors: 5
Affiliations: 3
Identifiers
Doi:
10.1007/s00253-010-2986-4
ISSN:
01757598
Research Areas
Environmental