摘要
甘蔗渣是甘蔗榨糖后的剩余物,我国的年产量高达1350万吨,目前主要用作锅炉燃料,少量用作人造板、制浆造纸的原料,总体利用价值较低。因富含半纤维素,甘蔗渣是一种极具潜力的功能性低聚木糖资源。本文研究了以甘蔗渣为原料,利用碱法提取其中木聚糖的工艺。通过单因素实验、正交试验,得到了以氢氧化钠水溶液提取甘蔗渣中木聚糖的优化工艺为:提取温度95℃、提取时间2h、固液比3∶70(g/mL,下同)、碱液浓度20%(W/W)、颗粒度20 40目,各工艺因素影响该提取过程的主次顺序为:提取温度>固液比>提取时间>碱液浓度>原料颗粒度。在上述优化工艺下,木聚糖的平均得率(以D-木糖表示)为6.998%。本研究结果能为有效解决大量制糖工业剩余物的利用问题提供思路,同时能为甘蔗渣木聚糖的精深加工和利用提供技术基础。
The bagasse is the residues from sugar industries and the amount is up to 1.35 107tons per year in China. At present, the utilization value of the bagasse is still low, it is mainly used as the fuel for boilers. Because of its high hemicellulose content, the bagasse is a kind of resources with high potential of functional xylo - oligosaccharide. The extraction technology was studied by alkaline solution extraction method. Through the single factor experiments and the Lls （45 ） orthogonal test, the optimal technological conditions with NaOH in water were obtained as follows ： extracting temperature 95~C, extracting time 2 hours, solid - liquid ratio 3 ： 70g/mL, concentration of alkaline solution 20% （m/m） and particle size of the raw material 20 -40 mesh. The influencing sequence of the main technological factors to the extraction process is as follows ： extracting temperature 〉 solid - liquid ratio 〉 extracting time 〉 concentration of al- kaline solution 〉 particle size of the raw material. The average yield of the xylan （ represented with the content of D - xy lose） is up to 6. 998% under the above optimal conditions. The research results can provide some thoughts for the us- age of the massive residues from sugar industries and provide technological foundations for the deeper processing and uti- lization of the xylan from bagasse.
出处
《中国食品添加剂》
CAS
北大核心
2013年第2期88-93,共6页
China Food Additives
基金
"2011年度湖南省大学生研究性学习和创新性实验计划项目(湘教通[2011]272号第149项)"
"中南林业科技大学2011年度大学生创业计划项目:利用甘蔗渣制备木聚糖"
"第二批湖南省普通高等学校特色专业:林产化工(湘教通〔2009〕283号)"
"十一五第四批湖南省普通高等学校优秀实习教学基地:张家界奥威科技有限公司(湘教通[2009]526号)"等项目联合资助
关键词
甘蔗渣
木聚糖
D-木糖
提取
碱法
bagasse
xylan
D - xylose
extraction
alkaline solution method
