FOOD SCIENCE ›› 2004, Vol. 25 ›› Issue (10): 115-118.

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Production of L-lactic Acid from Cellulase Hydrolysis of Soybean Straw Fermentated by Immobilized Lactobacillus casei

 XU  Zhong, YANG  Ping, WANG  Qun-Hui, JIANG  Zhao-Hua   

  1. 1.School of Food Engineering,Harbin University of Commerce;2. Department ofEnvironmental Science and Engineering, Harbin Institute of Technology;3.Department ofApplied Chemistry, Harbin Institute of Technology
  • Online:2004-10-15 Published:2011-10-24

Abstract: The factors affecting cellulose hydrolysis of soybean straw fermentated by immobilized Lactobacillus casei had beenstudied, and contrasting with free Lactobacillus casei. The result indicated that stability of immobilized cell for temperature ishigher than free one. Optimum temperature is 30℃; the bead size of immobilized cell have no effect on output of lactic acid; withthe increase of the density of candy, the output of lactic acid of free Lactobacillus casei and immobilized cell increased; the optimuminoculating amount of free Lactobacillus casei and immobilized cell is 10%. The optimum pH is 5.5, stability of immobilized cellfor pH is higher than free one.

Key words: L-lactic acid, Lactobacillus casei, fermentatation, soybean straw