JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2011, Vol. 35 ›› Issue (02): 78-82.doi: 10.3969/j.jssn.1000-2006.2011.02.017

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ptimization of cellulase components by mixed culture of Trichoderma reesei and Aspergillus niger

SONG Xiangyang,FANG Hao,OUYANG Jia,LI Xin,YONG Qiang   

  1. Key Laboratory of Forest Genetic and Biotechnology Ministry of Education, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037 China
  • Online:2011-04-13 Published:2011-04-13

Abstract: Mixed culture of Trichoderma reesei and Aspergillus niger was investigated to optimize the cellulase components in liquidstate fermentation. A mode of delayed inoculation was applied for cocultivation of T. reesei and A. niger. After cultivation of T. reesei for 48 h, A. niger was inoculated at the 1∶1 inoculum ratio. The βglucosidase activity and filter paper activity of the mixed fungi culture were 0.606 μmol/(min·mL) and 1.163 μmol/(min·mL), respectively, corresponding to a ratio of 0.521, which was higher than that of T. reesei under single cultivation. The yield of enzymatic hydrolysis was 65.61 % by the cocultivated cellulase, which was higher than those of singlecultivated cellulase and commercial cellulase. These results demonstrated that cocultivation of T. reesei and A. niger was suitable for optimization of cellulase components.

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