Green alkaline fractionation of sugarcane bagasse at cold temperature improves digestibility and delignification without the washing processes and release of hazardous waste

被引：8

作者：

Zahoor ^{[1
]}

Madadi, Meysam ^{[2
]}

Nazar, Mudasir ^{[1
]}

Shah, Syed Waqas Ali ^{[1
]}

Li, Nana ^{[1
]}

Imtiaz, Muhammad ^{[3
]}

Zhong, Zijing ^{[1
]}

Zhu, Daochen ^{[1
]}

机构：

[1] Jiangsu Univ, Biofuels Inst, Sch Emergency Management, Sch Environm & Safety Engn, Zhenjiang 212013, Peoples R China

[2] Jiangnan Univ, Sch Biotechnol, Key Lab Ind Biotechnol, Minist Educ, Wuxi 214122, Peoples R China

[3] Abdul Wali Khan Univ, Dept Hort, Mardan 23200, Pakistan

来源：

INDUSTRIAL CROPS AND PRODUCTS | 2023年 / 200卷

基金：

中国博士后科学基金;

关键词：

Green alkaline; UK pretreatment; Delignification; Sugarcane bagasse; Enzymatic digestibility; Waste restoration; waste recycling; BLACK LIQUOR; PRETREATMENT; MISCANTHUS;

D O I：

10.1016/j.indcrop.2023.116815

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A response surface design was used to pretreat sugarcane bagasse (SB) with urea (U)/potassium hydroxide (K) at low temperatures. Alkaline pretreatment can increase the digestibility of biomass by removing lignin. However, this pretreatment has common issues, such as high-water consumption and liquid waste generation. To address these issues, this study was conducted to perform the UK pretreatment without washing steps. Under optimized pretreatment condition (-20 degrees C, 7.5 % UK), hemicellulose and lignin removal were increased approximately by 1.4 (26.18-18.86 %) and 1.7 folds (21.25 % to 12.43 %), respectively, while cellulose increased by 1.6-fold (42.39-68.34 %) as compared to control. This enhanced the enzymatic hydrolysis by 3.16-fold (75.15 %). In addition, physicochemical analyses revealed that U facilitates fiber opening, reduces the crystallinity index of cellulose (55.06-49.03 %), and prevents lignin droplet formation from adhering to cellulose. Hence, UK pre-treatment can be a promising pretreatment technology for lignocellulosic valorization towards biorefinery without any washing in restoring the liquid substances.

引用

页数：10