中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 秸秆低聚木糖溶液纳滤分离特性和渗滤工艺 农业工程学报 2009,25 (4) 253-259
Position: Home > Articles > Separation performance of xylo-oligosaccharides from wheat straw using nanofiltration membrance and technology for diafiltration Transactions of the Chinese Society of Agricultural Engineering 2009,25 (4) 253-259

秸秆低聚木糖溶液纳滤分离特性和渗滤工艺

作  者：
赵鹤飞;杨瑞金;赵伟;卢蓉蓉;张文斌
单  位：
江南大学食品科学与技术国家重点实验室;江南大学食品学院
关键词：
低聚木糖;纳滤;膜;不可逆热力学;数学模型
摘  要：
该文研究了截留相对分子质量为250的纳滤膜分离以秸秆为原料生产的低聚木糖溶液的分离特性,并优化了渗滤纯化工艺。通过检测透过液和截留液中各糖组分的浓度,计算并得到了该膜对阿拉伯糖、木糖和聚合度(Degree of Polymerization)DP2到DP4的低聚木糖的截留率随膜通量变化的关系曲线;应用不可逆热力学模型对阿拉伯糖、木糖和DP2到DP4的低聚木糖中性溶质体系的截留率试验数据进行回归计算,求得了反射系数、溶质透过系数和水透过系数等膜分离特性参数,并根据立体位阻模型估算出膜的细孔结构参数。当糖液浓度为8.4%(总糖/糖浆),膜系统温度控制在(30.1±2.1)℃,跨膜压差控制在(1.58±0.02)×106Pa的恒定体积渗滤操作模式下,膜通量无衰减,稳定在(29.4±1.8)L/(m2·h),经3倍体积纳滤渗滤操作后,低聚木糖纯度由原料的83.33%(DP2到DP6低聚木糖/总糖)上升至92.54%,木二糖损失率为12.45%(对原料中的木二糖),总糖回收率为88.39%(对原料中的总糖)。纳滤分离模型的研究为低聚木糖溶液的渗滤纯化和浓缩模拟并精确优化工艺提供了参数基础,使用纳滤膜在渗滤操作模式下,可以高效脱除单分子糖,同时低聚木糖损失较小。
译  名：
Separation performance of xylo-oligosaccharides from wheat straw using nanofiltration membrance and technology for diafiltration
作  者：
Zhao Hefei1, Yang Ruijin2, Zhao Wei1, Lu Rongrong2, Zhang Wenbin2 (1. State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; 2. School of Food Science and Technology, Jiangnan University, Wuxi 214122, China)
关键词：
xylo-oligosaccharides, nanofiltration, membrane, irreversible thermodynamic, mathematical models
摘  要：
Separation performance and purification of xylo-oligosaccharides (XOs) solution derived from wheat straw by a nanofiltration(NF) membrane with a molecular weight cut-offs (MWCO) of 250 were investigated. The profiles of rejections of the arabinose, xylose and XOs with degree of polymerization (DP) from two to four at different membrane fluxes were obtained based on the detection of their concentrations in filtrate and retention. According to irreversible thermodynamics model, reflection coefficient, solute permeability, solution hydraulic permeability of arabinose, xylose and XOs with degree of polymerization (DP) from two to four were estimated. Furthermore, the membrane structure parameters were estimated by Steric-hindrance pore model. When feed concentration (total saccharide/syrup), membrane system temperature and trans-membrane pressure were 8.4%, (30.1±2.1)℃ and (1.58±0.02)×106 Pa, respectively, the flux was (29.4±1.8) L/(m2·h) without declination during diafltration, and the ultimate XOs content reached 92.54% (XOs/total saccharide) from 83.33%. The yield of total saccharide and the loss of xylobinose were 88.39% and 12.45%, respectively, after the addition of three times volumes of water. This investigation provides a basis of parameters for purification by diafiltration, concentration and optimization of those processes. Diafiltration with NF can efficiently remove monosaccharides with less loss of XOs.

相似文章

导出引用
计量
文章访问数: 12
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46