文献类型：期刊文献

中文题名：甲壳素碱煮废水耐碱纳滤膜纳滤传质机理研究

英文题名：The Mass-Transfer Analysis during the Chitin-Alkali Effluent Filtrated by Acid-Alkali Resistant Nanofiltration Membrane

作者：李娟[1,2];赵黎明[1,2];王彦超[2];范骏[1];李傲然[1]

机构：[1]华东理工大学发酵工业分离提取技术研发中心,上海200237;[2]华东理工大学食品科学与工程系,上海200237

年份：2012

卷号：12

期号：12

起止页码：40

中文期刊名：中国食品学报

外文期刊名：Journal of Chinese Institute Of Food Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD_E2011_2012】；

基金：国家自然科学基金项目(No.31101381)

语种：中文

中文关键词：碱性废水;纳滤膜;传质机理;通量;截留率

外文关键词：alkali-effluent; nanofiltration membrane; mass-transfer; flux; rejection

摘要：目的:使用耐碱纳滤膜(NFM)处理甲壳素碱煮液回收有机氮,探究不同操作条件对膜通量及目标物截留率的影响,确定膜主要操作参数,并进行纳滤(NF)浓缩传质机理分析。方法:在不同跨膜压差(TMP)及温度条件下分别对等体积的同一物料进行8h的全循环,并通过截留率及膜通量来确定最佳TMP和进料温度。在最佳膜操作条件下对物料进行纳滤浓缩回收肽。基于固定电荷TMS模型和立体位阻SHP模型,通过Matlab拟合膜相关参数,离线分析纳滤浓缩中间过程传质变化。结果:在TMP30bar,进料温度40℃条件下进行纳滤浓缩,可有效回收有机氮。物料衡算结果表明蛋白总透过率仅5.92%。在该操作条件下,纳滤浓缩过程中总氮截留率呈增长趋势。结论:使用耐酸碱纳滤膜可以有效回收有机氮。使用TMS和SHP模型,通过Matlab软件拟合膜参数,纳滤浓缩过程中膜孔会发生微弱的阻塞,且有效膜层吸附层的表面电荷密度较原始膜电荷密度大。在Donnan效应作用下,总氮的截留率呈增长趋势。
Objective：To recover organic nitrogen from chitin-alkali effluent by acid and alkali resistant Nanofiltration membrane（NFM）,the different operating conditions including the temperatures and the trans-membrane pressures（TMPs） were explored,which have taken an important role on the permeation fluxes and the rejection of the target.By that,membrane main operation parameters and Nanofiltration concentrated mass transfer analysis were established.Methods：The optimal TMP and the optimal temperature were determined by comparing the change of the fluxes and the rejections under the different operating conditions,under which the same alkali liquors in the equivalent volume were circulated for eight hours the NFM.After that,the alkali effluent was concentrated for the recovery of the organic nitrogen by the NFM under that certain conditions.The mass-transfer during the Nanofiltration of the effluent was analyzed via the Matlab simulating the parameters of the NFM basing on the Teorell-Meyer-Sievers（TMS） model and the Steric-Hindrance Pore（SHP） model.Results：The optimum operating condition was that the TMP was fixed at 30 bar（3.0 MPa） and the circulating temperature is around 40 ℃,which benefited the enrichment of the peptides and offered a faster flux than other conditions.Apart from that,the rejections of the peptides increased over the time.Finally,the penetration rate of the organic nitrogen was just 5.92%.The pore diameter of the stained NFM narrowed compared to the clean NFM,which was on the basis of the TMS model.And the surface charge density of the NFM got dense during the Nanofiltration,which was based on the SHP model.Conclusion：The membrane pore shrunk slowly and the membrane surface charge enriched during the concentration by the NFM,which might enlarged the rejections of the peptides.