错流工况滤饼质量影响因素的熵权法分析  

Analysis of the influence factors of cake mass deposition by entropy-weight method in the crossflow microfiltration of yeast suspensions

作　　者：王浩[1] 王湛[1] 马禹 崔彦杰[1] 储金树[1] 

机构地区：[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,北京100124 [2]新疆自治区气候中心,乌鲁木齐830002

出　　处：《膜科学与技术》2016年第4期91-96,共6页Membrane Science and Technology

基　　金：国家自然科学基金(21476006);国家自然科学基金(21176006)

摘　　要：选用孔径为0.1μm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,并采用熵权法分析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1.0~3.0g/L浓度范围内是随温度的上升而增加,在4.0~5.0g/L浓度范围内随温度的升高而减少;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（0.475 5）〉浓度（0.237 6）〉温度（0.205 4）〉错流速率（0.081 4）.The crossflow microfiltration experiment of yeast suspensions was performed by polyvinylidene fluoride （PVDF） membrane with 0. 1μm mean pore size in crossflow microfiltration. The changes of the mass of cake layer deposition and permeation flux with operating conditions were studied. A entropyweight method was used to study the contribution of different operating conditions on the mass of cake layer deposition of yeast suspensions. The results showed that the mass of cake layer deposition increased with the increasing feed concentration and operatiing pressure and decreased with the increasing crossflow velocity. The mass of cake layer deposition increased with the increasing the operating temperature in the range of feed concentration 1.0-3.0 g/L and then decreased in the range of feed concentration 4. 0-5.0 g/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 operating conditions on the mass of cake layer deposition were transmembrane pressure （0. 475 5） 〉 concentration （0. 237 6） 〉 temperature 〉 crossflow velocity （0.081 4）.

关 键 词：酵母悬浮液 微滤膜 过滤 操作条件 熵权法 

分 类 号：TQ028.8[化学工程]