Lignin removal enhancement from prehydrolysis liquor of kraft-based dissolving pulp production by laccase-induced polymerization

被引：60
作者：
Wang, Qiang [1 ,2 ]
Jahan, M. Sarwar [2 ,3 ]
Liu, Shanshan [1 ,2 ]
Miao, Qingxian [2 ,4 ]
Ni, Yonghao [2 ]
机构：
[1] Qilu Univ Technol, Key Lab Pulp & Paper Sci & Technol, Minist Educ, Jinan 250353, Shandong, Peoples R China
[2] Univ New Brunswick, Limerick Pulp & Paper Ctr, Fredericton, NB E3B 5A3, Canada
[3] BCSIR Labs, Pulp & Paper Res Div, Dhaka 1205, Bangladesh
[4] Fujian Agr & Forestry Univ, Coll Mat Engn, Fuzhou 350002, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 164卷
基金：
美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词：
Prehydrolysis liquor; Lignin removal; Laccase; Polymerization; Flocculation; PRE-HYDROLYSIS LIQUOR; DELIGNIFICATION; DETOXIFICATION; FLOCCULATION; IMPREGNATION; IMPROVEMENT; EFFICIENCY; CONVERSION; RECOVERY; ETHANOL;
D O I：
10.1016/j.biortech.2014.05.005
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Lignin removal is essential for value-added utilization of hemicelluloses and acetic acid present in the prehydrolysis liquor (PHL) of a kraft-based hardwood dissolving pulp production. In this paper, a novel process concept, consisting of laccase-induced lignin polymerization, followed by filtration/flocculation, was developed to enhance the lignin removal. The results showed that the lignin removal increased from 11% to 46-61% at laccase concentration of 1-4 U mL (1). The GPC results showed that the molecular weight of the lignin from the laccase treated PHL was increased by 160% in comparison with the original one. The subsequent flocculation using singular Poly-DADMAC system or dual polymer system of Poly-DADMAC/CPAM can further remove 10-15% lignin. The concentrations of hemicelluloses and acetic acid were negligibly affected during the laccase treatment, while flocculation caused 12-15% of total sugar loss. Additionally, the process incorporates this new concept into the kraft-based dissolving pulp production process was proposed. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：380 / 385
页数：6
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