AI Article Synopsis
- Researchers used cholinium lysine ionic liquid ([Ch][Lys]) mixed with water to pretreat rice straw, which improved its structure and made it easier for enzymes to access polysaccharides for digestion.
- The effectiveness of the pretreatment depended on the solvent's basicity, optimizing conditions while minimizing loss of xylan.
- The process resulted in high sugar yields (81% glucose, 48% xylose) from rice straw with minimal environmental impact, suggesting strong potential for industrial use.
Article Abstract
Pretreatment of rice straw by using renewable cholinium lysine ionic liquid ([Ch][Lys] IL)-water mixtures and subsequent enzymatic hydrolysis of the residues were conducted in this work. There is a clear correlation between the delignification capacity of the pretreatment solvent and its basicity. After pretreatment, surface area and pore volume of rice straw increased significantly, which substantially improved polysaccharides accessibility to enzymes and thus enhanced polysaccharides digestion. By carefully controlling the pretreatment severity (IL content, temperature and duration), loss of readily extractable xylan could be minimized. The sugar yields of 81% for glucose and 48% for xylose were achieved in the enzymatic hydrolysis of rice straw after pretreatment with 20% [Ch][Lys]-water mixture at 90 °C for 1 h. This pretreatment process is highly promising for industrial application because of high sugar yields, low energy input, short pretreatment time, and being environmentally benign and highly tolerant to moisture.
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| http://dx.doi.org/10.1016/j.biortech.2013.02.118 | DOI Listing |
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