教師資料查詢 | 類別: 會議論文 | 教師: 黃國楨 Hwang, Kuo-Jen (瀏覽個人網頁)

標題:A Study on the Mechanism of Cake Filtration of Soft Colloids
學年90
學期1
發表日期2001/12/07
作品名稱A Study on the Mechanism of Cake Filtration of Soft Colloids
作品名稱(其他語言)
著者Hwang, Kuo-Jen; Hsueh, Chan-Li
作品所屬單位淡江大學化學工程學系
出版者
會議名稱第二十三屆輸送現象及其應用研討會暨膜分離論壇 第四屆台灣-新加坡環境保護技術研討會=The 23st Symposium of Transport Phenomena and 1ts Applications/Membrance Seperation Forum/The 4st Taiwan-Singapore Jiont Symposium on Environmental Technology
會議地點臺北市, 臺灣
摘要The mechanism of cake filtration of soft colloids is studied.Dextran-MnO/sub 2/ particles are prepared and used in "dead-end" cakefiltration. The deformation of particles and the compression of cakedue to solid compressive pressure result in the suddenly decrease ofporosities of cake and particles, which result in an abrupt increaseof specific filtration resistance of cake. The dynamic analysis methodproposed by Lu and Hwang (1993) is modified and used to estimate thevariations of local cake properties during filtration. From the trendof a filtration curve of soft colloids, the whole filtration operationcan be divided into three stages according to the curvature of thecurve. At the beginning of filtration, the deposition and therearrangement of colloidal particles on the membrane surface cause theoverall filtration resistance to increase. The linear filtration curveimplies a constant average specific filtration resistance of cakeduring this period of filtration. The second stage begins when thefiltration time exceeds 60 seconds. The deformation and compression ofcolloids result in a formation of skin layer with a compact structurenext to the membrane surface. Therefore, the slope of the tangent offiltration curve increases sharply in this stage due to a suddendecrease in cake porosity and an increase in filtration resistance.When filtration time exceeds 720 seconds, the new-formed cake has aloose structure because most of solid compressive pressures areexerted on the skin layer formed at the second stage. As a result, thefiltration curve changes back to be linear which similar to that inthe first stage. All of these phenomena are demonstrated using thescanning electronic microscopy (SEM).
關鍵字微過濾;濾餅過濾;軟質膠體;可變形粒子;濾餅性質;Microfiltration;Cake Filtration;Soft Colloid;Deformable Particle;Cake Property
語言英文
收錄於
會議性質
校內研討會地點
研討會時間20011207~20011207
通訊作者
國別中華民國
公開徵稿Y
出版型式紙本
出處第二十三屆輸送現象及其應用研討會暨膜分離論壇第四屆台灣-新加坡環境保護技術研討會論文集=Proceedings of The 23st Symposium of Transport Phenomena and 1ts Applications/Membrance Seperation Forum/The 4st Taiwan-Singapore Jiont Symposium on Environmental Technology
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