淡江大學機構典藏:Item 987654321/94959
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 62797/95867 (66%)
造访人次 : 3733865      在线人数 : 403
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    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/987654321/94959


    题名: 通入氣泡對酵母菌之掃流微過濾性能的影響
    作者: 黃國楨;許指恩
    贡献者: 淡江大學化學工程與材料工程學系
    关键词: 掃流微過濾;濾餅性質;通氣;生物分離;Cross-flow microfiltration;Cake property;Gas-sparging;Bio-separation
    日期: 2007-11
    上传时间: 2014-02-09 00:48:32 (UTC+8)
    摘要: 本研究旨在探討通入氣泡對酵母菌的掃流微過濾性能之影響。實驗中使用平均孔徑為0.1 μm的醋酸纖維膜來過濾平均粒徑為4.7 μm之酵母菌粒子;探討操作條件,例如氣體之流量、過濾壓差、液體速度等,對濾速、濾餅性質及濾面上剪切力之影響。實驗結果顯示,當氣體流量越大時,作用於濾面上剪切力也越大,濾餅量會顯著減少,但是也會導致粒子排列的更緊密,使得濾餅之平均過濾比阻增加;綜合濾餅量與過濾比阻兩個因素,則濾餅的總阻力反而會隨這氣體之流量的增加而增加,導致濾速下降。故濾餅的結構或平均過濾比阻亦是影響濾速與過濾阻力的重要因素。此外,提升液體速度掃流速度能夠有效提升濾速,但若速度超過0.3 m/s則反而會導致濾速下降。雖然提升過濾壓差可以增加過濾驅動力,但也會使得濾餅被壓縮的更為緊密、增加濾餅的過濾阻力,進而導致濾速反而下降。
    The gas-sparging cross-flow microfiltration of bio-suspension is studied. A filter membrane made of mixed cellulose ester with a mean pore size of 0.1 .mu.m is used for filtering 4.7 .mu.m yeast cells .The effects of operating conditions, such as liquid velocity, gas velocity and filtration pressure, on the filtration rate, cake properties, shear stress acting on the membrane surface are discussed. An increase in gas flow rate leads the shear stress on the membrane surface and the average specific filtration resistance of cake to increase, but the cake mass to decrease. To take these factors into consideration, the overall filtration resistance is increased and the filtration rate is decreased with the increasing the flow rate of sparging gas. In addition, the filtration rate increases with the increase of liquid velocity under low velocity range. When liquid velocity exceeds 0.3 m/s, a contrary tendency is obtained. This is because the cake structure becomes more compact. Since the average specific filtration resistance of cake plays the major role in determining filtration resistance to operate under low liquid velocity range can enhance the filtration rate.
    關聯: 2007年台灣化學工程學會第54屆年會暨國科會化工學門成果發表會論文集,4頁
    显示于类别:[化學工程與材料工程學系暨研究所] 會議論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    通入氣泡對酵母菌之掃流微過濾性能的影響_中文摘要.docx摘要20KbMicrosoft Word213检视/开启
    通入氣泡對酵母菌之掃流微過濾性能的影響_英文摘要.docx摘要18KbMicrosoft Word117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

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈