| 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 | en |
| 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 | TWN |
| 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 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/94979 ) |
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