A novel recyclable furoic acid-assisted pretreatment for sugarcane bagasse biorefinery in co-production of xylooligosaccharides and glucose

Biotechnology for Biofuels

Yong Xu¹  Xin Zhou¹  Lin Dai¹  Tian Huang²  Kankan Jiang³ 

[1] Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, No. 159 Longpan Road, 210037, Nanjing, People’s Republic of China;Key Laboratory of Forestry Genetics & Biotechnology (Nanjing Forestry University), Ministry of Education, 210037, Nanjing, People’s Republic of China;Jiangsu Province Key Laboratory of Green Biomass-Based Fuels and Chemicals, 210037, Nanjing, People’s Republic of China;Key Laboratory of Forestry Genetics & Biotechnology (Nanjing Forestry University), Ministry of Education, 210037, Nanjing, People’s Republic of China;Jiangsu Province Key Laboratory of Green Biomass-Based Fuels and Chemicals, 210037, Nanjing, People’s Republic of China;School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, 310053, Hangzhou, People’s Republic of China;

关键词: Furoic acid;    Recyclable;    Xylooligosaccharides;    Sugarcane bagasse;    Enzymatic hydrolysis;   

DOI  :  10.1186/s13068-021-01884-3

来源: Springer

【 摘 要 】

BackgroundPretreatment is the key step for utilizing lignocellulosic biomass, which can extract cellulose from lignin and disrupt its recalcitrant crystalline structure to allow much more effective enzymatic hydrolysis; and organic acids pretreatment with dual benefic for generating xylooligosaccharides and boosting enzymatic hydrolysis has been widely used in adding values to lignocellulose materials. In this work, furoic acid, a novel recyclable organic acid as catalyst, was employed to pretreat sugarcane bagasse to recover the xylooligosaccharides fraction from hemicellulose and boost the subsequent cellulose saccharification.ResultsThe FA-assisted hydrolysis of sugarcane bagasse using 3% furoic acid at 170 °C for 15 min resulted in the highest xylooligosaccharides yield of 45.6%; subsequently, 83.1 g/L of glucose was harvested by a fed-batch operation with a solid loading of 15%. Overall, a total of 120 g of xylooligosaccharides and 335 g glucose could be collected from 1000 g sugarcane bagasse starting from the furoic acid pretreatment. Furthermore, furoic acid can be easily recovered by cooling crystallization.ConclusionThis work put forward a novel furoic acid pretreatment method to convert sugarcane bagasse into xylooligosaccharides and glucose, which provides a strategy that the sugar and nutraceutical industries can be used to reduce the production cost. The developed process showed that the yields of xylooligosaccharides and byproducts were controllable by shortening the reaction time; meanwhile, the recyclability of furoic acid also can potentially reduce the pretreatment cost and potentially replace the traditional mineral acids pretreatment.

【 授权许可】

CC BY