摘要
为提高稻壳中木聚糖的提取率,稻壳经3%的硫酸预处理后再用碱法进行木聚糖的提取,采用响应面法优化工艺条件,先对提取温度、NaOH浓度、固液比、提取时间4个因素进行单因素试验。根据单因素试验结果设计中心组合试验,以木聚糖提取率为考察指标,采用响应面分析法确定最优工艺参数。结果表明:提取温度69.8℃、NaOH浓度10.7%、固液比1∶13(m∶V)、提取时间5.1h。该条件下,木聚糖提取率可达76.57%。
Response surface methodology was used to optimize the conditions for alkaline extraction of xylan from rice husk,and the rice husk was pretreatmented by 3% sulfuric acid before use.The effects of extraction tempeature,NaOH concentration,solid-to-liquid ratio and extraction time on the yield of xylan were studied in single factor experiments.Subsequently,a regrssion model for the yield of xylan was established using a central composite design involving the above four factors at five levels and based on the model,response surface analysis was carried out to find out the optimum levels of these four factors.The results indicated that the optimum extraction conditions were： temperature 69.8 ℃,NaOH concetration 10.7%,solid-to-liquid ratio 1∶13,and extraction time 5.1 h.Under such conditions,the experimental yield of xylan was 76.57%.
出处
《食品与机械》
CSCD
北大核心
2011年第6期114-118,共5页
Food and Machinery
基金
长沙市重大科技专项(编号:K0902007-21)
湖南省自然科学基金委员会与衡阳市政府自然科学联合基金(编号:11JJ8001)
关键词
稻壳
木聚糖
响应面法
rice husk
xylan
response surface analysis
