高温液态水预处理园林废弃物提高酶解率  

LIQUID HOT WATER PRETREATMENT OF GARDEN WASTE TO ENHANCE ITS ENZYMATIC DIGESTIBILITY

作　　者：卞士祥 余强[2] 庄新姝[2] 王琼[2] 朱银萍 袁振宏[2,3] Bian Shixiang;Yu Qiang;Zhuang Xinshu;Wang Qiong;Zhu Yinping;Yuan Zhenhong(Nano Science and Technology Institute,University of Science and Technology of China,Hefei 230026,China;Guangzhou Institute of Energy Conversion,Key Laboratory of Renewable Energy,Chinese Academy of Sciences, Guangdong Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510540,China;Collaborative Innovation Center of Biomass Energy,Zhengzhou 450002,China)

机构地区：[1]中国科学技术大学纳米科学技术学院,合肥230026 [2]中国科学院广州能源研究所中国科学院可再生能源重点实验室广东省新能源和可再生能源研究开发与应用重点实验室,广州510640 [3]生物质能源河南省协同创新中心,郑州450002

出　　处：《太阳能学报》2019年第1期142-148,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51476179;21476233);广东省自然科学基金重点项目(2015A030311022);广州市珠江科技新星专项(201610010110);中国科学院青年创新促进会(2015289)

摘　　要：为探寻园林废弃物的能源化再利用潜力,以红花羊蹄甲树枝和台湾草废弃物为原料,采用高温液态水预处理方法进行工艺优化研究,以提高其酶解率。结果表明:红花羊蹄甲树枝的最优P因子为1233,台湾草废弃物的最优P因子为153,此时总木糖收率分别为85.48%和68.40%,总糖收率分别达到87.84%和86.31%,72 h酶解率分别由原料的43.99%和55.94%提高到81.25%和87.27%,其中台湾草废弃物比红花羊蹄甲树枝在预处理前后都更易酶解。高温液态水预处理过程脱除了大量半纤维和部分木质素,显著改变了物料表面平整结构,增大了比表面积和纤维素结晶指数,这些变化有助于后续酶解。In order to explore the energy reuse potential of garden waste,Bauhinia blakeana Dunn branches and Zoysia tenuifolia waste were selected as raw materials,and they were pretreated with liquid hot water to obtain the process optimization results and improve the enzymatic digestibility. The results indicated that the optimal P-factor of Bauhiniablakeana Dunn branches and Zoysia tenuifolia waste was 1233 and 153 respectively. At this time,the Bauhinia blakeanaDunn branches and Zoysia tenuifolia waste got total xylose yield of 85.48% and 68.40%,total sugar recovery of 87.84% and 86.31%,and 72 h enzymatic digestibility of 81.25% raised from 43.99% and 87.27% raised from 55.94% respectively,in addition,Zoysia tenuifolia waste had better properties of enzymatic hydrolysis than Bauhinia blakeana Dunn branches. Liquid hot water pretreatment removed a large number of hemicelluloses and some lignin,there was a significant change in surface structure after pretreatment,and it also increased the specific surface area and cellulose crystallinity index,all of the changes could help to improve the accessibility of cellulose to enzyme and increase the enzymatic digestibility.

关 键 词：生物质 酶水解 生物乙醇 预处理 

分 类 号：TK6[动力工程及工程热物理—生物能]