Improvement of Enzymatic Saccharification and Ethanol Production from Rice Straw Using Recycled Ionic Liquid: The Effect of Anti-Solvent Mixture

被引:24
作者
Chuetor, Santi [1 ]
Panakkal, Elizabeth Jayex [2 ]
Ruensodsai, Thanagorn [2 ]
Cheenkachorn, Kraipat [1 ]
Kirdponpattara, Suchata [1 ]
Cheng, Yu-Shen [3 ]
Sriariyanun, Malinee [2 ]
机构
[1] King Mongkuts Univ Technol North Bangkok, Fac Engn, Dept Chem Engn, Bangkok 10800, Thailand
[2] King Mongkuts Univ Technol North Bangkok, Sirindhorn Int Thai German Grad Sch Engn, Dept Chem & Proc Engn, Bangkok 10800, Thailand
[3] Natl Yunlin Univ Sci & Technol, Dept Chem & Mat Engn, Touliu 640, Yunlin, Taiwan
来源
BIOENGINEERING-BASEL | 2022年 / 9卷 / 03期
关键词
anti-solvent; enzymatic saccharification; EMIM-Ac; ethanol; ionic liquid; lignocellulosic biomass; recycling;
D O I
10.3390/bioengineering9030115
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
One of the major concerns for utilizing ionic liquid on an industrial scale is the cost involved in the production. Despite its proven pretreatment efficiency, expenses involved in its usage hinder its utilization. A better way to tackle this limitation could be overcome by studying the recyclability of ionic liquid. The current study has applied the Box-Behnken design (BBD) to optimize the pretreatment condition of rice straw through the usage of 1-ethyl-3-methylimidazolium acetate (EMIM-Ac) as an ionic liquid. The model predicted the operation condition with 5% solid loading at 128.4 degrees C for 71.83 min as an optimum pretreatment condition. Under the optimized pretreatment condition, the necessity of the best anti-solvent was evaluated among water, acetone methanol, and their combinations. The study revealed that pure methanol is the suitable choice of anti-solvent, enhancing the highest sugar yield. Recyclability of EMIM-Ac coupled with anti-solvent was conducted up to five recycles following the predicted pretreatment condition. Fermentation studies evaluated the efficacy of recycled EMIM-Ac for ethanol production with 89% more ethanol production than the untreated rice straw even after five recycles. This study demonstrates the potential of recycled ionic liquid in ethanol production, thereby reducing the production cost at the industrial level.
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页数:15
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