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題名 | The Effect of K戹a on the Ethanol Yield for Xylose Fermentation=氧氣質傳係數在五碳醣醱酵中對酒精產率之影響 |
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作者 | 劉懷勝; 周濟民; 李雅琪; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 33:2 2002.03[民91.03] |
頁次 | 頁161-166 |
分類號 | 463.8 |
關鍵詞 | 氧氣質傳係數; 五碳醣; 醱酵; 比齊酵母菌; 酒精轉化率; Oxygen transfer coefficient; D-xylose; Ethanol; Pichia stipitis; Fermentation; Newspaper waste; |
語文 | 英文(English) |
中文摘要 | 以比齊酵母菌屬(Pichia stipitis CBS 5773)自木糖生產酒精之醱酵系為研究對象,探討通氣量對其醱酵能力之影響,並以四種不同反應器為操作系統。實驗結果發現,在較高的氧氣質傳系數□a下能增進酵母菌的比生長速率□。然而,欲得到較高的酒精轉化率,需將系統的□a值正在0.004□以下,當□a大於此值時,酒精轉化率則會下降。並發現在酒精轉化率及醱酵的時間上,與人工合成的培養液並沒有明顯的差異。因此酒精轉化率與氧 氣質傳係數關係亦在報紙水解物醱酵驗證。 |
英文摘要 | D-xylose was bioconverted into ethanol using yeast of Pichica stipitis CBS 57.3 A similar effect of the oxygen transfer coefficient, □a, on the ethanol yield was observed among various configurations of bioreactors, namely, shake flask (250 ml, 500ml), spinner flask (400 ml), and stirred tank (5L). That is , the ethanol yield could reach about 0.37g ethanol/g xylose if □a was lower than 0.004 □. It was noted that the yield fell rapidly as □a increased, however, thigh aeration rate promotes cell growth rate. Also, the technique of strain adaption and selection was used successfully th enable the yeast to ferment the newspaper hydrolyzates. Again, the effect on the yield due to □a in both synthetic and hydrolyzate media was quite consistent. |
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