期刊
ENZYME AND MICROBIAL TECHNOLOGY
卷 46, 期 1, 页码 38-42出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.enzmictec.2009.07.009
关键词
Carboxymethylcellulase; Bacillus subtilis subsp subtilis; Rice bran; Industrial-scale production
资金
- Dong-A University Research Fund
Rice bran and yeast extract were found to be the best combination of carbon and nitrogen sources for the production of carboxymethycellulase (CMCase) by Bacillus subtilis subsp. subtlis A-53. Optimal concentrations of rice bran and yeast extract for the production of CMCase were 5.0% (w/v) and 0.10% (w/v), respectively. Optimal temperature and initial pH of medium for cell growth of B. subtilus subsp. subtilis A-53 were 35 C and 7.3. whereas those for the production of CMCase by B. subtilus subsp. subtilis A-53 were 30 C and 6.8. Optimal agitation speed and aeration rate in a 7 L bioreactor were 300 rpm and 1.0 vvm. respectively. The optimal agitation speed and aeration rate for the production of CMCase by B. subtilus subsp. subtilis A-53 were lower than those for cell growth. The highest productions of CMCase by B. subtilus subsp. subtilis A-53 in 7 and 100 L bioreactors were 150.3 and 196.8 U mL(-1), respectively. (C) 2009 Elsevier Inc. All rights reserved.
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