生物技术通报 ›› 2014, Vol. 0 ›› Issue (3): 111-116.

• 研究报告 • 上一篇    下一篇

里氏木霉FS10-C固体发酵基质筛选及发酵条件初探

罗洋1,2, 滕应2, 刘方3, 马文亭2 ,李振高2   

  1. (1. 贵州大学农学院,贵阳 550025;2. 中国科学院土壤环境与污染修复重点实验室(南京土壤研究所),南京 210008;3. 贵州大学资源与环境工程学院,贵阳 550025)
  • 收稿日期:2013-09-20 出版日期:2014-03-29 发布日期:2014-03-31
  • 作者简介:罗洋,男,硕士研究生,研究方向:重金属污染农田土壤生物修复技术;E-mail: yluo@issas.ac.cn
  • 基金资助:
    国家高技术研究发展计划(“863”计划)(2012AA06A204)

Screening of Solid Media and Optimization of the Fermentation Conditions for Trichoderma reesei FS10- C

Luo Yang1,2, Teng Ying2, Liu Fang3, Ma Wenting2, Li Zhengao2   

  1. (1. Soil Science Agricultural College, Guizhou University, Guiyang 550025;2. Key Laboratory of Soil Environmentand Pollution Remediation(Institute of Soil Science, Chinese Academy of Sciences), Nanjing 210008;3. Resources and Environmental Engineering College, Guizhou University, Guiyang 550025)
  • Received:2013-09-20 Published:2014-03-29 Online:2014-03-31

摘要: 筛选适宜里氏木霉FS10-C菌株固体发酵的基质,并优化其发酵基本条件,以期为将该菌株应用于土壤重金属污染修复中奠定基础。采用单因素试验对固体发酵基质进行筛选,在筛选结果的基础上,再运用正交试验设计初步确定适宜的发酵条件,并在 50 L固体发酵罐中进行放大试验。结果表明,桔皮麦麸混合物为木霉FS10-C的最佳发酵基质,优化后的平皿固体发酵条件为:桔皮、麦麸按1∶1比例配伍,固水比为1:1.2,接种量为5%,发酵温度为28℃,发酵14 d后产孢量可高达2.43×1010 CFU/g,且应用于固体发酵罐中发酵效果良好,产孢量达到1.44×1010 CFU/g。通过对固体发酵基质的筛选和发酵条件的优化,可实现木霉FS10-C的高密度培养,降低制剂成本,具有规模化生产的潜力。

关键词: 里氏木霉FS10-C, 固体发酵, 发酵条件, 生物修复剂

Abstract: In order to provide a foundation for the application of the Trichoderma reesei FS10-C on remediation of heavy metals-contaminated soils, the solid fermentation substrate and the fermentation conditions were studied. The fermentation substrate was screened through a single factor, then confirmed the appropriate fermentation conditions using a method of orthogonal combination and different factors. In addition, an enlarge experiment was also carried out in a 50 L solid fermentation tank. The result showed that the mixture of orange peel and wheat bran were deemed the best fermentation material for Trichodermaressei FS10-C. The optimal conditions in plate as following:the proportion of orange peel to bran and solid material to water were 1∶1 and 1∶1.2 respectively, inoculum 5%, the temperature of fermentation was 28℃. Under this optimal fermentation conditions, the spore number were up to 2.43×10 10 CFU/g after 14 days, and the effect was satisfactory when it had been applied to solid fermentation tank, the spore number were 1.44×1010 CFU/g. Through the screening of soild media and optimization of the fermentation conditions, the cost of production was reduced, and FS10-C biomass through the optimization of fermentation conditions was increased. The solid fermentation of FS10-C had the potential of mass production.

Key words: Trichoderma reesei,FS10-C,Solid fermentation,Fermentation conditions, Bioremediating inoculant