摘要
通过对不同孔径的ZrO2陶瓷膜在微滤过程中的阻力分布、高分子去除率、物理化学参数变化等的测定,分析污染物的存在状态或位置以及形成规律,探索无机陶瓷膜微滤中药药酒的污染机制.同时采用超声物理手段强化膜过程,寻求有效的膜污染防治手段.结果发现:对于本实验体系中药"三两半药酒",膜孔径为0.2μm的ZrO2膜的污染度略低于0.05μm孔径膜.两种孔径膜管的最主要污染源均表现在堵孔层,差异最大的是吸附阻力,孔径为0.05μm的ZrO2膜的吸附阻力约为0.2μm孔径膜的两倍.膜对三两半药酒中蛋白质和淀粉的去除作用较显著.微滤后的药酒呈透明浅棕黄色,口感更香醇清爽,微滤前后的药效未见明显变化.经孔径为0.2μm的ZrO2陶瓷膜微滤后药酒的浊度变化最大,由49.0NTU降至2.83NTU,但药液的pH、电导率、黏度在微滤前后波动较小.超声强化对孔径为0.2μm的ZrO2陶瓷膜通量提高率达36.3%.
The resistance distribution, polymer removal, and physical-chemical parameters were measured before and after microtTiltration by ZrO2 ceramic membranes with different pore size. The existence or location and formation of the pollutants were analyzed. Ultrasound was applied to strengthen membrane microfiltration to prevente membrane fouling. The results showed that 0 . 2μm ZrO2 had a lower foulingdegree of membrane. For both 0. 2 μm ZrO2 and 0. 05 /,m ZrO2 pore membranes, the main pollution sources existed in the pore blocking layer. The biggest difference beteen the tow membanes was the adsorption resistance. The 0. 05μm ZrO2 had about double adsorption resistance as much as 0. 2μm ZrO2. At the same time, it was found 0. 2 μm and 0. 05 μm ZrO2 membranes presented a significant function on removal of pectin and starch. ZrO2 membrane had a better refining results on clarifieating Sanliangban liquor, which presented a light brown yellow, and a more mellow and had a refreshing flavor after microfiltration. The efficacy components of Sanliangban liquor had little changes before and after microfiltration. The most significant improvement was the turbidity which decreased from 49.0 NTU to 2. 83 NTU before and after microfiltration by 0. 2 μm ZrO2 membrane. However, the fluctuations of pH value, viscosity and conductivity were minor. It was found that ultrasonic could increase 0. 2 μm ZrOe membrane flux to 36.3%.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2012年第4期98-101,117,共5页
Membrane Science and Technology
基金
国家自然科学基金项目(30572374
30873449)
国家科技部"十一五"支撑项目(2006BAI06A04-04)
关键词
ZrO2陶瓷膜
三两半药酒
膜污染
超声
ZrO2 membrane
Sanliangban liquor
membrane fouling
ultrasound
