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

作　　者：Chih-Heng Wang Wen-Hua Chen Hwai-Shen Liu Jinn-Tsyy Lai Cheng-Che Hsu Ben-Zu Wan 

机构地区：[1]Department of Chemical Engineering,Norional Taiwan University,Taipei,China [2]Institute of Nuclear Energy Research,Taoyuan,China [3]Food Industry Research and Development Institute,Hsinchu,China

出　　处：《Chinese Journal of Chemical Engineering》2018年第2期386-392,共7页中国化学工程学报（英文版）

基　　金：the Ministry of Science and Technology of Taiwan for financially supporting this research under Contract No.NSC-1022623-E-002-012-ET

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).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 

分 类 号：TQ914.3[化学工程] TS205[轻工技术与工程—食品科学]