Bistage Control Technique for Improving Ergosterol and Polysaccharides Production from Agaricus blazei Murrill by Submerged Fermentation
文献类型: 外文期刊
第一作者: Gao Hong
作者: Gao Hong;Shi Defang;Guo Peng;Yang De;Zhou Ming
作者机构:
关键词: Agaricus blazei Murrill;ergosterol;polysaccharides;bistage control fermentation
期刊名称:2011 3RD WORLD CONGRESS IN APPLIED COMPUTING, COMPUTER SCIENCE, AND COMPUTER ENGINEERING (ACC 2011), VOL 3
ISSN: 2160-0708
年卷期: 2011 年 3 卷
页码:
收录情况: SCI
摘要: On the basis of previous studies, the fermentation production of ergosterol and polysaccharides from Agaricus blazei Murrill was further optimized in a 5L mechanically stirred-fermenter. The bi-stage control technique, that is, shifting the pH and culture temperature from 4.43 and 26 degrees C to 5.43 and 22 degrees C respectively at 48 hr, was introduced to improve mycelia growth and exopolysaccharide production. The other parameters were set at 309 rev/min of agitation speed, 1 vvm (3.0 L/min) of aeration rate, 8%of inoculation density and 0.015 Mpa of tank pressure. The yield under the optimal condition were 11.52 g/L of dry mycelia, 107 mg/L of ergosterol, 260 mg/L intracellular polysaccharide and 298 mg/L exopolysaccharide, which were 7.9%, 44.6%, 21.5% and 3.7% higher than the pH-uncontrolled fermentation at constant temperature, respectively.
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