浙江农业学报

• 食品科学 • 上一篇    下一篇

绿色木霉液态发酵产纤维素酶条件的优化

  

  1. (1甘肃农业大学 动物科学技术学院,甘肃 兰州 730070;2江苏农牧科技职业学院 动物科技学院,江苏 泰州 225300)
  • 出版日期:2015-03-25 发布日期:2015-03-31

Optimization of liquid fermentation for cellulase production by Trihoderma viride

  1. (1 College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China; 2 College of Animal Science and Technology, Jiangsu Agri\|animal Husbandry Vocational College, Taizhou 225300, China)
  • Online:2015-03-25 Published:2015-03-31

摘要: 选取绿色木霉化L4C作为纤维素酶的生产菌株,分别研究了碳源、氮源、接种量、培养时间、培养温度和培养基初始pH对液态发酵方法产纤维素酶的影响。并在单因素试验的基础上,采用正交试验研究了绿色木霉化L4C液态发酵产纤维素酶的最佳培养条件。结果表明,培养时间对酶产量影响最大,液态发酵的最佳条件为:分别以稻草粉—纤维素粉混合物和硫酸铵为碳源和氮源,初始pH 50,接种量15%,28℃培养5 d。在最佳产酶条件下,羧甲基纤维素酶活性为1 31516 U·mL-1,滤纸酶活性为1 28277 U·mL-1。

关键词: 绿色木霉, 液态发酵, 纤维素酶, 滤纸酶

Abstract: Taking Trihoderma viride L4C as production strain, the influences of carbon source, nitrogen source, inoculum level, incubation time, cultivation temperature and initial pH value on cellulase activity produced by liquid fermentation were studied in this paper. On the basis of single factor tests, orthogonal test was made to study the optimal liquid fermentation conditions. The results showed that the incubation time had the largest effect on the yield of cellulase. The optimal condition was listed as follows: carbon source was the mixture of straw powder and cellulose powder, nitrogen source was ammonium sulfate, inoculum level was 15%, incubation time was 5 days, cultivation temperature was 28℃, initial pH value was 50. Under this condition, the activities of CMCase and FPAase were 1 31516 U·mL-1 and 1 28277 U·mL-1, respectively.

Key words: Trichoderma viride, liquid fermentation, cellulose, FPAase