大豆乳清超滤中膜通量衰减的模拟研究  

Simulation of membrane permeate flux decline in soybean whey ultrafiltration

作　　者：吕斯濠[1] 迟军 陈福明[3] 王晓玉 

机构地区：[1]郑州大学化学工程学院,郑州450002 [2]广州市建设委员会,广州511400 [3]深圳清华大学研究院,广东深圳518057 [4]哈尔滨宏兴水处理公司,哈尔滨150090

出　　处：《哈尔滨商业大学学报（自然科学版）》2007年第3期289-294,共6页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：深圳市科技三项基金资助项目(S040145)

摘　　要：根据膜通量衰减的过程曲线,把超滤膜通量的衰减过程分为2个阶段,分别对应于快速衰减期、缓慢衰减期,建立了膜通量J随处理时间t变化的半经验模型,采用该半经验模型,很好地拟合了大豆乳清液超滤过程中膜通量衰减的过程,分析了超滤膜材料、膜截留分子质量(MWCO)以及切向于膜面的水流速度等条件下膜通量衰减的影响因素,结果表明对每一个通量衰减阶段,造成膜通量衰减的原因均不是某一种因素的单独作用,阶段1内膜通量衰减的原因不仅仅是吸附污染,还涉及浓差极化和膜孔堵塞作用,阶段2内膜通量衰减的原因受膜材料、膜MWCO和进水流速等多种因素的影响而各不相同.A semi-empirical model of permeate flux （J） of uhrafihration membrane as a function of process time （t） was carried out based on the discipline of permeate flux variation in the process of soybean whey UF in which the permeate flux curve was divided into two periods as initial rapid decline period and relative slowly decline one respectively. A program is devised using the software of Matlab for simulating the variation of J vs. t efficiently as considered the aspects of membrane materials, membrane molecular weight cutoff and crossflow velocity. The results revealed that the reasons caused the decline of permeate flux in the first period is not only involved with adsorption fouling, but also concentration polarization and pore blocking; and the ones involved in the second period could be affected by membrane characteristics, membrane nominal molecular weight cut off, and operating conditions of the setup.

关 键 词：膜污染 大豆乳清 膜通量衰减 半经验模型 

分 类 号：X703[环境科学与工程—环境工程]