齐整小核菌发酵产硬葡聚糖的补料控制策略

  • 高荣伟 ,
  • 周景文 ,
  • 徐国强.
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  • 1 (江南大学,工业生物技术教育部重点实验室,江苏 无锡 214122) 2 (江南大学,粮食发酵工艺与技术国家工程实验室,江苏 无锡,214122)
硕士研究生

收稿日期: 2018-03-11

  修回日期: 2018-04-08

  网络出版日期: 2018-11-23

基金资助

国家自然科学基金重大项目(21390204)

Strategies for feeding control in microbial production of scleroglucan bySclerotium rolfsii WSH-G01

  • GAO Rong-wei ,
  • ZHOU Jing-wen ,
  • XU Guo-qiang.
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  • 1 (Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China) 2 (National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, China)

Received date: 2018-03-11

  Revised date: 2018-04-08

  Online published: 2018-11-23

摘要

为促进齐整小核菌(Sclerotium rolfsii WSH-G01)利用葡萄糖生产硬葡聚糖,在确定了最优搅拌转速的基础上,研究了2种补料方式对菌体生物量和多糖产量的影响。确定了控制搅拌转速400 r/min;发酵40 h时开始,恒速流加补料葡萄糖总浓度400 g/L,流速6 g/(L·h),补料维持时间32 h的补料策略是最佳补料调控策略。结果表明,此种补料方式在齐整小核菌发酵72 h时获得最高硬葡聚糖产量32.62 g/L,生物量22.36 g/L,生产强度0.45 g/(L·h),底物利用率28%。多糖产量较另一种补料方式提高了15%,较分批发酵提高了76.5%。

本文引用格式

高荣伟 , 周景文 , 徐国强. . 齐整小核菌发酵产硬葡聚糖的补料控制策略[J]. 食品与发酵工业, 2018 , 44(10) : 51 -56 . DOI: 10.13995/j.cnki.11-1802/ts.017234

Abstract

In order to improve the production of scleroglucan by Sclerotium rolfsii WSH-G01 using glucose as the substrate, on the basis of the optimal stirring speed, the effects of two feeding methods on biomass and titer of polysaccharides were studied. The stirring speed was 400 r/min. The best feeding strategy was maintaining the feeding speed of 6 g/(L·h) for 32 h after 40 h of fermentation when the total glucose concentration was 400 g/L. The results showed that the highest titer of polysaccharide (32.62 g/L), the biomass (22.36 g/L), the productivity (0.45 g/(L·h)), and the substrate utilization rate (28%) were reached at 72 h. The polysaccharide production was 15% higher than that obtained using the other feeding method and increased by 76.5% compared with batch fermentation.
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