生物技术通报 ›› 2015, Vol. 31 ›› Issue (12): 227-233.doi: 10.13560/j.cnki.biotech.bull.1985.2015.12.033

• 研究报告 • 上一篇    下一篇

产脂肪酶黑曲霉摇瓶发酵条件优化研究

张谦1,贾佳2,林智2,杨晓锋3,郭宏涛2,王剑英2,Carol Sze Ki Lin3   

  1. 1.深圳技师学院,深圳 518116;2.深圳市绿微康生物工程有限公司,深圳 518055;3.香港城市大学能源与环境学院,香港
  • 收稿日期:2015-03-18 出版日期:2015-12-19 发布日期:2015-12-19
  • 作者简介:张谦,男,高级工程师,研究方向:工业微生物及发酵工程;E-mail:qianz@yeah.net
  • 基金资助:
    深圳市科技创新委员会技术创新计划项目(CXZZ20130425111508558)

The Optimization of Flask Fermentation Conditions for the Production of Extracellular Lipase from Aspergillus niger

Zhang Qian1, Jia Jia2, Lin Zhi2, Yang Xiaofeng3, Guo Hongtao2, Wang Jianying2, Carol Sze Ki Lin3   

  1. 1. Shenzhen Institute Technology,Shenzhen 518116;2. Shenzhen Leveking Bio-engineening Co.,LTD,Guangdong Shenzhen 518055;3. School of Energy and Environment,City University of Hong Kong,Hong Kong
  • Received:2015-03-18 Published:2015-12-19 Online:2015-12-19

摘要: 黑曲霉Aspergillus niger G62s是一株具有遗传稳定的高产脂肪酶菌株。针对于G62s摇瓶发酵条件进行统计学优化研究,以提高该菌株的产脂肪酶能力。首先,采用单因素方法对发酵接种量、摇瓶装量、培养温度、培养时间等因素进行考查,在此基础上进行4因素3水平的响应面分析(Response surface methodology,RSM)的统计学优化。得到的优化发酵条件是接种量1.9 %,摇瓶装量56 mL(500 mL摇瓶),培养温度30 oC,培养时间75 h。在该优化条件下,脂肪酶活性达到(212 9 ± 39.9)U/mL,相比初始的发酵条件提高16.7%。针对于影响G62s菌株产脂肪酶的4个发酵条件,在单因素实验的基础上通过RSM方法优化,显著提高了目标菌株脂肪酶产量。

关键词: 黑曲霉, 脂肪酶, 单因素方法, 响应面分析方法, 发酵条件优化

Abstract: Aspergillus niger G62s is a genetically stable strain of producing high-yield lipase. This work is to have statistic optimization for the flask fermentation conditions of G62s aiming at increasing the capacity of strain yielding lipase. Firstly, using single-factor test, the effects of these 4 parameters, i.e., the inoculation amount, working volume, culture temperature and culture time, on the lipase yield were studied. Then the key parameters of fermentation conditions were statistically optimized through the response surface methodology(RSM)with 4 factors in 3 levels. The optimal conditions were 1.9% inoculum size in 56 mL working volume(in 500 mL flasks)at 30oC for 75 h. Using these conditions, the activity of lipase reached 212 9±39.9 U/mL, increased 16.7% comparing to that of the initial fermentation conditions. In conclusion, based on the single-factor test of 4 fermentation factors affecting the lipase yield of G62s, optimization by RSM significantly increased the yield of the target strain.

Key words: Aspergillus niger, lipase, single-factor test, response surface methodology, optimization of fermentation conditions