系統識別號 | U0002-2107200811493000 |
---|---|
DOI | 10.6846/TKU.2008.00697 |
論文名稱(中文) | 逆洗與通氣對管式薄膜過濾蛋白質溶液濾速增進之探討 |
論文名稱(英文) | Flux Enhancement by Backwashing and Gas-sparging in Tubular Membrane Filtration of Protein Solution |
第三語言論文名稱 | |
校院名稱 | 淡江大學 |
系所名稱(中文) | 化學工程與材料工程學系碩士班 |
系所名稱(英文) | Department of Chemical and Materials Engineering |
外國學位學校名稱 | |
外國學位學院名稱 | |
外國學位研究所名稱 | |
學年度 | 96 |
學期 | 2 |
出版年 | 97 |
研究生(中文) | 鄭運馨 |
研究生(英文) | Yun-Hsin Cheng |
學號 | 695400050 |
學位類別 | 碩士 |
語言別 | 繁體中文 |
第二語言別 | |
口試日期 | 2007-06-23 |
論文頁數 | 112頁 |
口試委員 |
指導教授
-
鄭東文
委員 - 蔡少偉 委員 - 葉和明 |
關鍵字(中) |
薄膜結垢 等電點 逆洗 通氣 |
關鍵字(英) |
Membrane fouling Isoelectric point Backwashing Gas-sparging |
第三語言關鍵字 | |
學科別分類 | |
中文摘要 |
本研究以掃流式無機薄膜過濾系統探討蛋白質溶液之過濾行為與結垢現象,並尋求提升濾速之操作方式。實驗溶液為BSA溶液,操作參數有透膜壓差、濃度、pH值、液體速度、氣體速度、逆洗頻率等,另也計算薄膜過濾之各項阻力,及以淨濾速比較不同操作方式之性能。 實驗結果顯示,pH值為3時濾速最高、pH值為7時次之、pH值為4.9時濾速最低,由於濃度極化層的阻力與BSA之電性及形狀有關,pH值為3時BSA為帶狀且表面帶電,濃度極化層不易堆積,因此濾速最高,pH值為4.9時,BSA為球狀且表面不帶電,因此所形成之濃度極化層最緻密,使得濾速最低。而由不同操作方式之淨濾速分析可知,通氣為最佳的操作方式,逆洗會因清洗耗去的濾液量而使濾速低於一般過濾。通氣可移除濃度極化層,防止BSA粒子吸附於膜面,且不需耗費濾液清洗,因此具有最高的淨濾速, pH值為3時,通氣約可提高60%之濾速。 |
英文摘要 |
Inorganic membranes were employed in a cross-flow filtration system for investigating the flux behavior and membrane fouling of BSA solutions. The operating parameters included transmembrane pressure, solution concentration, pH value, liquid velocity, air velocity and backwashing frequency. The filtration resistances were also evaluated and the net permeate flux was considered in order to compare the performances of various operation modes, For varying the pH, the experimental results show that the permeate flux is maximum at pH = 3 and is minimum at pH = 4.9. The BSA particle’s shape and surface charge were determined by the pH value. At pH = 3, the BSA molecules are linear with surface charge, the BSA polarization layer in the filtration has a loose structure results in a lower filtration resistance.. At pH = 4.9, a compact BSA polarization layer’s structure was formed due to the neutral and nearly spherical BSA molecues. Basing on the analysis of net permeate flux, the gas sparging method is better than the backwashing for flux enhancement. The gas sparging can effectively remove the polarization layer and reduce the BSA deposition on the membrane. Furthermore, no permeate is wasted for washing in gas sparging. At pH =3, the flux increment by gas sparging is up to 60%. |
第三語言摘要 | |
論文目次 |
圖目錄 IV 表目錄 VII 第一章 序論 1 1.1 前言 1 1.2 薄膜分離 2 1.3 濃度極化與結垢現象 4 1.4 本研究之目標 6 第二章 文獻回顧 9 2.1 蛋白質簡介 9 2.1.1 蛋白質酸鹼性質 9 2.1.2 蛋白質的等電點 9 2.1.3 蛋白質之相關研究 10 2.2 薄膜超過濾之特性 13 2.3 影響濾速之因素 15 2.4 提高濾速之方法 17 2.5 濾速分析模式 25 第三章 實驗裝置與方法 36 3.1 實驗裝置 36 3.2 實驗藥品 36 3.3 實驗步驟 37 3.4 操作條件 37 3.4.1 系統操作條件 37 3.4.2 流量計校正與雷諾數計算 38 3.5 分析方法 38 3.5.1 分析儀器 38 3.5.2 BSA的分析方法與條件 38 3.5.3 阻隔率之計算 39 3.6 薄膜清洗 39 第四章 結果與討論 47 4.1 薄膜純水濾速 47 4. 2 BSA溶液濾速 47 4.2.1 液體掃流速度之影響 47 4.2.2 通氣之影響 50 4.2.3 逆洗操作之影響 54 4.2.4 通氣與逆洗操作之比較 56 4.2.5 浄濾速分析 57 4.3 阻力分析 59 4.3.1 阻力串聯模式 59 4.3.2 液體掃流對阻力之影響 59 4.3.3 氣體掃流對阻力之影響 60 4.3.4 逆洗對阻力之影響 61 4.3.5 不同操作對阻力之影響 62 4.4 模式分析 62 4.4.1 滲透壓模式 62 4.4.2 物性參數 64 4.7.2 計算結果 65 第五章 結論 92 5.1 掃流速度的影響 92 5.2 逆洗對濾速之影響 92 5.3 pH値之影響 93 5.4 阻力分析 93 5.5 滲透壓模式 94 5.6 淨濾速分析 95 5.7 總結 95 符號說明 97 參考文獻 100 附錄 110 圖目錄 圖1.1 薄膜分離程序之分類 7 圖1.2 (a)濾餅過濾及(b)掃流過濾示意圖 8 圖2.1 蛋白質(胺基酸)的雙極結構 10 圖2.2 蛋白質(胺基酸)的帶電性與環境性質之關係 10 圖2.3 蛋白質結構圖(a)中性溶液下(b)pH值3之下 11 圖2.4 壓力對濾速之關係圖 32 圖2.5 提高濾速之方法 33 圖2.6 氣液兩相之流動型態圖 34 圖2.7 膠層極化之濃度分佈圖 35 圖3.1 管式陶瓷薄膜過濾實驗裝置圖 40 圖3.2 TiO2薄膜介達電位隨著pH值之變化圖 41 圖3.3 流體流量計校正圖(流量計A) 41 圖3.4 流體流量與掃流速度(UL)之關係圖(流量計A) 42 圖3.5 管式單通道薄膜流體流量與雷諾數之關係圖(流量計A) 42 圖3.6 流體流量計校正圖(流量計B) 43 圖3.7 流體流量與掃流速度(UL)之關係圖(流量計B) 43 圖3.8 管式單通道薄膜流體流量與雷諾數之關係圖(流量計B) 44 圖4.1 MWCO 5k Da薄膜純水濾速圖 67 圖4.2 100 kPa下不同液體速度之濾速變化圖 67 圖4.3 300 kPa下不同液體速度之濾速變化圖 68 圖4.4 100 kPa下不同液體速度之濾速變化圖 68 圖4.5 300 kPa下不同液體速度之濾速變化圖 69 圖4.6 100 kPa下不同氣體速度之濾速變化圖 69 圖4.7 300 kPa下不同氣體速度之濾速變化圖 70 圖4.8 100 kPa下不同氣體速度之濾速變化圖 70 圖4.9 300 kPa下不同氣體速度之濾速變化圖 71 圖4.10 間歇性通氣之濾速變化圖 71 圖4.11 pH値3下通氣與ㄧ般過濾之濾速變化圖 72圖4.12 pH値4.9下通氣與ㄧ般過濾之濾速變化圖 72 圖4.13 pH値7.0下通氣與ㄧ般過濾之濾速變化圖 73 圖4.14 不同頻率下之濾速變化圖 73 圖4.15 pH=3.0之下逆洗與過濾濾速變化圖 74 圖4.16 pH=4.9之下逆洗與過濾濾速變化圖 74 圖4.17 pH=7.0之下逆洗與過濾濾速變化圖 75 圖4.18 不同pH值之下逆洗濾速變化圖 75 圖4.19 pH值7.0之下不同操作手法之濾速變化圖 76 圖4.20 pH值4.9之下不同操作手法之濾速變化圖 76 圖4.21 pH值3.0之下不同操作手法之濾速變化圖 77 圖4.22 不同操作頻率下淨濾速對比圖 77 圖4.23 不同操作手法之下各pH值淨濾速對比圖 78 圖4.24 100 kPa下不同掃流速度之阻力變化圖 78 圖4.25 300 kPa下不同掃流速度之阻力變化圖 79 圖4.26 100 kPa下不同掃流速度之阻力變化圖 79 圖4.27 300 kPa下不同掃流速度之阻力變化圖 80 圖4.28 100 kPa下通氣與ㄧ般過濾之阻力變化圖 80 圖4.29 300 kPa下通氣與ㄧ般過濾之阻力變化圖 81 圖4.30 100 kPa下通氣與ㄧ般過濾之阻力變化圖 81 圖4.31 300 kPa下通氣與ㄧ般過濾之阻力變化圖 82 圖4.32 不同pH値下通氣阻力變化圖 82 圖4.33 pH値3.0下通氣與ㄧ般過濾之阻力變化圖 83 圖4.34 pH値4.9下通氣與ㄧ般過濾之阻力變化圖 83 圖4.35 pH値7.0下通氣與ㄧ般過濾之阻力變化圖 84 圖4.36 逆洗頻率15 : 1之阻力變化圖 84 圖4.37 逆洗頻率10 : 1之阻力變化圖 85 圖4.38 逆洗頻率5 : 1之阻力變化圖 85 圖4.39 不同逆洗頻率下總阻力變化圖 86 圖4.40 pH=3.0之下逆洗與過濾阻力對比圖 86 圖4.41 pH=4.9之下逆洗與過濾阻力對比圖 87 圖4.42 pH=7.0之下逆洗與過濾阻力對比圖 87 圖4.43 不同pH值之下逆洗阻力對比圖 88 圖4.44 pH=3之下不同操作手法阻力對比圖 88 圖4.45 pH=4.9之下不同操作手法阻力對比圖 89 圖4.46 pH=7.0之下不同操作手法阻力對比圖 89 圖4.47 滲透壓模式下理論與實驗濾速比較圖(1000ppm;100 kPa) 90 圖4.48 滲透壓模式下理論與實驗濾速比較圖(1000ppm;300 kPa) 90 圖4.49 滲透壓模式下理論與實驗濾速比較圖(2000ppm;100 kPa) 91 圖4.50 滲透壓模式下理論與實驗濾速比較圖(2000ppm;300 kPa) 91圖A-1 BSA檢量線 110 表目錄 表1.1 不同操作程序之驅動力分類 7 表3.1 薄膜性質說明 44 表3.2 BSA特性說明 45 表3.3 流量計A刻度與實際流量、掃流速度、雷諾數之關係 45 表3.4 流量計B刻度與實際流量、掃流速度、雷諾數之關係 46 表4.1 各薄膜純水透過率及薄膜阻力 47 表4.2 通氣操作之流態 50 表4.3 不同逆洗頻率之濾速表 66 表4.4 不同操作手法之濾速表 66 |
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