A study on the performance of submerged membrane filtration with different feed composition

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 學位論文 > Item 987654321/34895

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/34895

题名:	A study on the performance of submerged membrane filtration with different feed composition
其它题名:	不同進料組成對沉浸式薄膜過濾系統性能之研究
作者:	李日瑋;Lee, Zeh-wae
贡献者:	淡江大學化學工程與材料工程學系碩士班鄭東文;Cheng, Tung-wen
关键词:	沉浸式薄膜;傾斜;通氣;濃度極化;Submerged Membrane;Inclination;Aeration;Concentration Polarization
日期:	2005
上传时间:	2010-01-11 05:44:38 (UTC+8)
摘要:	本研究是探討在不同的操作參數下沉浸式薄膜過濾系統其過濾系統之表現。其中操作參數包括溶質種類、濃度和組成，薄膜模組之傾斜角，薄膜種類，曝氣量，透膜壓差，與間歇式操作的運用。在固定壓差法下，利用實驗中各參數的變化來獲得濾速對時間的變化。實驗結果顯示：各實驗系統在曝氣為零的情況下濾速衰退的情況非常快且容易達到與壓差無關的臨界濾速，而曝氣不為零的情況下，在溶質為Dextran T500的系統中，在100k MWCO薄膜中少量曝氣即可以達到與大量曝氣同樣減緩濾速快速衰退的情形，而在500k MWCO 薄膜中不同的曝氣量有著較顯著的不同之濾速提升情形。溶質為PMMA顆粒的系統下，在100k MWCO薄膜中曝氣量的多寡對濾速影響並不明顯且其濾速值與純水濾速相近，而在500k MWCO薄膜中濾速有著比在Dextran T500溶質系統中曝氣有著更明顯的影響。在Dextran T500與PMMA顆粒混合溶液中，溶質比例的不論如何變化，即使在提升大顆粒的附著性系統中(PMMA顆粒濃度高達7.5 kg/m3)，其濾速行為仍然與只有Dextran T500溶質系統的濾速行為相近。薄膜傾斜角度的變化(900-1600) 對於在500k MWCO 薄膜下PMMA溶質系統中濾速的改善非常顯著，而在Dextran T500溶質系統中，在1600下少量曝氣即具有在900下大量曝氣同樣的效果。 In the study, the performance of the submerged membrane filtration system was investigated in different experimental parameter. and fixed trans-membrane pressure difference method was used. The operated condition in the study included the concentration and composition of the solute, the inclination angle of the membrane module, the rejection rate (MWCO) of membrane, aeration rate, and trans-membrane pressure difference. In the system of no aeration, the flux inclination was very serious and reached the critical flux easily. In the filtration system of Dextran T500, the effect of little aeration rate is equal to the membrane performance of large aeration rate in 100k MWCO membrane, and the different aeration rates had more obvious different effects in 500k MWCO membrane than in 100k MWCO. Dextran T500 was also measured in different aeration rates and inclination angles. The aeration had more effect in the filtration system of PMMA powders than in that of Dextran T500.In the double solute system, Dextran T500 played a major role in the flux behavior of the filtration system even if the concentration of T500 was a quite low concentration. The concentration boundary layer thicknesses calculated by concentration polarization model and boundary layer model were discussed in the study.
显示于类别:	[化學工程與材料工程學系暨研究所] 學位論文

文件中的档案:

档案	大小	格式	浏览次数
	0Kb	Unknown	539	检视/开启

在機構典藏中所有的数据项都受到原著作权保护.

TAIR相关文章

数据加载中.....