摘要
采用H3PO4联合H2O2(简称PHP)预处理地肤,基于木质素、半纤维素去除率、纤维素回收率、酶水解率等,研究温度、时间、H3PO4与H2O2浓度配比对预处理效果的影响。结果表明:提升预处理温度、时间和H3PO4浓度配比对半纤维素和木质素去除率有明显的促进作用,半纤维素和木质素去除率最大可达100.0%和90.7%,但也会加剧纤维素的损失。过高的H3PO4浓度配比(≥70%)不利于半纤维素和木质素去除。除10℃外,其他条件下,酶水解率差异不显著(>90%),但过高强度会导致一定程度的水解速率下降。
In this work,Kochia scoparia is pretreated with PHP(concentrated H3PO4 plus H2O2)to investigate the effects of 3 key parameters,including temperature,duration,ratio of H3PO4 and H2O2,on delignification and hemicellulose removal,cellulose recovery,and the subsequent enzymatic hydrolysis.Results indicate that promoting pretreatment temperature,duration,and the ratio of phosphoric acid can improve the hemicellulose removal and delignification significantly,and result in the cellulose loss greatly.Maximal on hemicellulose removal and delignification of 100%and 90.7%can be achieved.In addition,the extra high ratio of phosphoric acid(higher than 70%)is negative to remove hemicellulose and lignin.The investigated parameters do not significantly affect the subsequent enzymatic hydrolysis(>90%cellulose-glucose conversion)except for the lower temperature of 10℃.However,the dramatic severities will decrease the enzymatic hydrolysis in a certain degree.
作者
郑循雯
彭天娇
邱婧雯
沈飞
Jinguang Hu
Zheng Xunwen;Peng Tianjiao;Qiu Jingwen;Shen Fei;Jinguang Hu(School of Environment,Sichuan Agricultural University,Chengdu 611130,China;Institute of Ecological and Environmental Sciences,Sichuan Agricultural University,Chengdu 611130,China;Forest Products Biotechnology,Department of Wood Science,University of British Columbia,Vancouver V6T 1Z4,BC,Canada)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第7期9-16,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(21978183)
四川省科技厅国际合作项目(2017HH0047)
国家级大学生创新创业训练计划(201710626028)。
关键词
生物质
解构
脱木质素
酶水解
脱半纤维素
能源植物
biomass
decomposition
delignification
enzymatic hydrolysis
hemicellulose removal
energy plant
