东南大学学报（自然科学版）2013，Vol.43Issue(1)：105-109,5.DOI:10.3969/j.issn.1001-0505.2013.01.020
采用酸-超声波强化碱预处理稻秆和玉米芯
Acid-ultrasound strengthened alkali pretreatment of rice straw and corncob
摘要
Abstract
Performance of different pretreatment of rice straw and corncob were compared and the strengthening mechanism of ultrasound was investigated through raw material component analysis and saccharification rate analysis. The effect of ultrasound on crystalline structure of rice straw and corncob was studied by XRD( X-ray diffraction) and DNS (3 ,5-dinitrosalicylic acid) colorimetry was used for the filtrate after ultrasound pretreatment for the saccharification rate. The results show that the mass percentage of hemicellulose in rice straw is decreased by 20.61% and that of lignin in corncob is reduced by 45. 98% after ultrasound radiation for a shorter pretreatment time on the basis of acid and alkali combination. Furthermore, the saccharification rate of rice straw and corncob are enhanced by 20.18% and 9.47% .respectively. Meanwhile, an increase in the peak intensity of (002) plane for both materials are clearly observed after ultrasound pretreatment. It demonstrates that for different raw material the ultrasound is beneficial to the reduction of mass percentag of lignin or hemicellulose, and the former directly affects the crysalline structure.关键词
预处理/酸-碱耦合/超声波/稻秆/玉米芯Key words
pretreatment/ acid-alkali combination/ ultrasound/ rice straw/ corncob分类
资源环境引用本文复制引用
严青,仲兆平,张茜芸..采用酸-超声波强化碱预处理稻秆和玉米芯[J].东南大学学报（自然科学版）,2013,43(1):105-109,5.基金项目
国家重点基础研究发展计划(973计划)资助项目(2011CB201505). （973计划）
