SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (2): 386-392.DOI: 10.1016/j.cjche.2017.06.004

• Biotechnology and Bioengineering • Previous Articles     Next Articles

Process development for producing a food-grade glucose solution from rice straws

Chih-Heng Wang1, Wen-Hua Chen2, Hwai-Shen Liu1, Jinn-Tsyy Lai3, Cheng-Che Hsu1, Ben-Zu Wan1   

  1. 1 Department of Chemical Engineering, National Taiwan University, Taipei, China;
    2 Institute of Nuclear Energy Research, Taoyuan, China;
    3 Food Industry Research and Development Institute, Hsinchu, China
  • Received:2017-02-04 Revised:2017-06-06 Online:2018-03-16 Published:2018-02-28
  • Contact: Ben-Zu Wan

Process development for producing a food-grade glucose solution from rice straws

Chih-Heng Wang1, Wen-Hua Chen2, Hwai-Shen Liu1, Jinn-Tsyy Lai3, Cheng-Che Hsu1, Ben-Zu Wan1   

  1. 1 Department of Chemical Engineering, National Taiwan University, Taipei, China;
    2 Institute of Nuclear Energy Research, Taoyuan, China;
    3 Food Industry Research and Development Institute, Hsinchu, China
  • 通讯作者: Ben-Zu Wan

Abstract: In this paper, processes for producing a food-grade glucose solution through enzymatic hydrolysis of celluloserich solids obtained from rice straws are presented. The rice straws were pretreated by acid-catalyzed steam explosion, and the reaction efficiency, toxicity control, and process economic feasibility were studied. Mass transfer resistance to the hydrolysis reaction was reduced by grinding with glass beads. A higher glucose concentration could be obtained by feeding more cellulose in the hydrolysis reaction; however, this also resulted in the production of undesired byproducts. Thus, a soaking process for the cellulose solids in water was developed to effectively reduce the generation of byproducts in the hydrolysis reaction. The resulting food-grade glucose solution can provide 414 kilocalories per liter, and could be used during a food-shortage crisis in the future. The current production cost is estimated to be 0.82 USD·L-1.

Key words: Cellulose, Enzymatic hydrolysis, Food-grade glucose solution, Rice straw, Biochemical engineering

摘要: In this paper, processes for producing a food-grade glucose solution through enzymatic hydrolysis of celluloserich solids obtained from rice straws are presented. The rice straws were pretreated by acid-catalyzed steam explosion, and the reaction efficiency, toxicity control, and process economic feasibility were studied. Mass transfer resistance to the hydrolysis reaction was reduced by grinding with glass beads. A higher glucose concentration could be obtained by feeding more cellulose in the hydrolysis reaction; however, this also resulted in the production of undesired byproducts. Thus, a soaking process for the cellulose solids in water was developed to effectively reduce the generation of byproducts in the hydrolysis reaction. The resulting food-grade glucose solution can provide 414 kilocalories per liter, and could be used during a food-shortage crisis in the future. The current production cost is estimated to be 0.82 USD·L-1.

关键词: Cellulose, Enzymatic hydrolysis, Food-grade glucose solution, Rice straw, Biochemical engineering