- 作者: 黃世佑
- 作者服務機構: 國立臺灣大學
- 中文摘要:
本文旨在探討氣舉式醱酵槽(Air Lift Fermenter)之混合特性及氧氣傳遞速率,
以內徑50mm高560mm及內徑98mm高720mm之壓克力製雙管氣泡塔模擬具有
通氣管(Draft Tube)之氣舉式醱酵槽“
以NaCl溶液為追?劑(Tracer),在槽進口處以Impulse Input並以電導度計測
定其逗留時間分佈(Residence Time Distribution),知此種反應器可以"Combined
n-Equal-Sized Tanks in Series and plug Flow with Recycle Model"作為混
合之數學模式。據此模式推測連續醱酵菌體之出口濃度,得知槽中之流型趨向plug Flow
及回流比愈大時出口菌體濃度愈高,此可作為操作及設計氣舉式醱酵槽之參考“
在氧氣傳遞方面,於相同之動力消耗下,此種氣舉式醱酵槽較攪拌槽式醱酵槽具有較
高之氧氣傳遞速率。
t - 英文摘要: Performance studies on Air Lift Fermenter with a draft tube was carriedout by using a pair of acrylic resin tubes, 50mmI.D.x560mmHt. and 98mmI.D.x 720mmHt. respectively. A tracer (1 N NaCl Solution) was introduced into the bottom of thedraft tube and the Residence Time Distribution of the fermenter was de-termined by observing the impulse response of the the tracer. It was shownthat the mixing model of this reactor can be simulated by "Combined n-Equal-Sized Tanks in Series and pluf Flow with Recycle Mpdel." Accordingto this model, the theoretical equation related to the output concentrationof the cell mass of continuous cultivation was derived·It was concluded thatthe concentration of cell mass in output increases with increase of Recycle`Ratio and Plug Flow Volume in reactor. Oxygen transfer coefficient as measured by sulfite oxidation method inthis fermenter is higher than that in the agitated vessel fermentor on thebasic of the power consumption.
- 中文關鍵字: --
- 英文關鍵字: --