A novel thermotolerant methylotrophicBacillus sp. and its potential for use in single-cell protein production |
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Authors: | I M Banat M Murad I Y Hamdan |
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Institution: | (1) Department of Biology, University of Al-Ain, P.O. Box 17551, Al-Ain, Abu-Dhabi, United Arab Emirates;(2) Kuwait Institute for Scientific Research, P.O. Box 24885, 13109 Safat, Kuwait;(3) Agriculture Research Station, Jordan University of Science and Technology, P.O. Box 3030, Irbid, Jordan |
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Abstract: | A thermotolerant methylotrophicBacillus sp. (KISRI TM1A, NCIMB 40040), isolated from the Kuwaiti environment and belonging to the group II spore-forming, bacilli, could not be correlated with any knownBacillus sp. It may, therefore, be a new species. It grew at temperatures from 37° to 58°C from pH 6.5 to 9.0 and on methanol up to 40 g l–1. It grew well in a chemostat. Its biomass yield coefficient was improved by about 30% by optimization of medium and growth conditions, reaching a maximum of 0.44g g–1 at 45°C pH 6.8 to 7.0, dilution rate 0.25 h–1 with methanol at 10 g l–1. Average crude protein and amino acid content were 84% and 60%, respectively, and maximum productivity attained under laboratory conditions was 5.06 g l–1h–1. It was concluded that this strain has good potential for use in single-cell protein production. |
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Keywords: | Bacillus methylotrophic bacterium methylotrophs single-cell protein thermotolerant |
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