膜科学与技术

错流工况滤饼质量影响因素的熵权法分析

作者：王浩¹ 王湛¹ 马禹² 崔彦杰¹ 储金树¹

单位： 1.北京工业大学环境与能源工程学院，化学化工系，绿色催化与分离北京市重点实验室，北京 100022；2．新疆自治区气候中心，乌鲁木齐，830002

关键词：酵母悬浮液；微滤膜；过滤；操作条件；熵权

出版年,卷(期):页码： 2016,36(4):91-96

摘要：

选用孔径为0．1 μm 聚偏氟乙烯（PVDF）微滤膜对酵母悬浮液进行了错流过滤实验．研究了微滤膜上酵母滤饼质量随操作条件的变化规律性并采用熵权法分析了各操作条件对微滤膜上酵母滤饼质量的定量贡献．研究结果表明：微滤膜上酵母的滤饼质量在错流过滤过程中随压力、浓度的增加而增加，但随错流速率的增加而减小，而温度对滤饼质量的影响在1. 0 g/L～3．0 g/L浓度范围内是随着温度的上升而增加，在4. 0 g/L～5．0 g/L浓度范围内随着温度的升高而减少；膜通量随着温度、压力、错流速率的增加而增加，但是随着酵母悬浮液浓度的增加而减少。操作条件对滤饼质量影响程度的顺序为：压力(0．4755) > 浓度(0．2376) > 温度(0．2054) > 错流速率(0．0814)．

The crossflow microfiltration experiment of yeast suspensions was performed by polyvinylidene fluoride (PVDF) membrane with 0.1μm average pore size in crossflow microfiltration. The change of the mass of cake layer deposition and permeation flux with operating conditions was studied. A entropy method was used to study the contribution of different operation conditions on the mass of cake layer deposition of yeast suspensions．The result showed that the mass of cake layer deposition increased with the increasing of feed concentration and operation pressure and decreased with the increase of crossflow velocity. It's worth noting that the mass of cake layer deposition increased with the increase of the operation temperature in the range of feed concentration 1.0～3.0g/L and then decreased in the range of feed concentration 4.0～5.0g/L. Operating temperature，pressure and crossflow velocity have a positive contribution to permeate flux．But the feed concentration has a negative contribution to permeate flow．The sequence and influence degrees of operation conditions on the mass of cake layer deposition were transmembrane pressure (0.4755) > concentration (0.2376) > temperature (0.2054) > crossflow velocity (0.0814).

第一作者简介：王浩（1992-），男，河北邢台市人，硕士生，从事膜污染及其控制技术研究，Email:perfectwanghao@emails.bjut.edu.cn.*通讯作者：Email: wangzh@bjut.edu.cn.

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