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| 陶瓷膜有机物污染的阻力分析研究 |
| Ceramic Membrane Resistance of Organic Matter Pollution Analysis and Research |
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| DOI：10.3969/j.issn.1671-5322.2013.01.011 |
| 中文关键词: 陶瓷膜 膜污染 过滤阻力 |
| 英文关键词: ceramic membrane membrane fouling filtration resistance |
| 基金项目: |
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| 中文摘要: |
| 陶瓷膜污染主要由膜面滤饼层、膜面凝胶层、膜孔堵塞3部分污染组成,通过陶瓷膜污染过程的实验研究,对陶瓷微滤膜有机污染进行了阻力分析,分析了操作压力、模拟液浓度、模拟液温度对膜过滤过程中总阻力以及各部分阻力的影响.结果表明:在0.05 MPa～0.2 MPa的试验操作压力范围内,膜表面阻力所占比例均在75％以上,是膜污染最主要来源；膜孔堵塞阻力所占比例较小,且随着操作压力的增大,膜孔堵塞阻力越不明显；随着模拟液TOC值的提高,膜污染加剧,在3 mg/L～40 mg/L的实验浓度范围内,膜表面阻力均占总阻力的50％以上,是膜污染的重要来源；通过电镜对陶瓷膜被污染前后的断面进行扫描比较在微观层面上证实了阻力分析的结果. |
| 英文摘要: |
| Ceramic membrane pollution is mainly composed of three parts,namely,filter cake layer at the membrane surface,the gel layer at the membrane surface,membrane pore jams.Through the experiment of the ceramic membrane fouling process,this paper analyzes the organie pollution of ceramic microfiltration membrane resistance.It analyzes the operating pressure,liquid concentration,simulation of temperature on the total resistance in membrane filtration process and the influence of resistance of each part.The results show that on the 0.05 MPa to 0.2 MPa test operating pressure,proportion of membrane surface resistance are over 75%.So it is thought to be the most important source of membrane pollution.With the increase of operation presure,the smaller the proportion of membrane pore blocking resistance is,the less obvions it is.With the improvement of simulated fluid TOC value,membrane fouling increase,at 40 mg/L to 3 mg/L experimental concentration,the membrane surface resistance are account for more than 50% of total resistance,which is thought to be important source of membrane pollution.By comparing the difference between the scan pictures by electron microscopy(sem) of ceramic membrane polluted before and after.The results of the analysis is confirmed at the micro level of resistance. |
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