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題 名 | Cultivation of Absidia coerulea for Chitosan Production in a Modified Airlift Reactor=利用雙網管氣舉式發酵槽發酵生產幾丁聚醣 |
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作 者 | 吳文騰; 黃定國; 王培銘; 陳志威; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 32:3 2001.05[民90.05] |
頁 次 | 頁235-240 |
分類號 | 460.02 |
關鍵詞 | 雙網管; 氣舉式發酵槽; 發酵; 幾丁聚醣; Chitosan; Absidia coerulea; Modified airlift reactor; |
語 文 | 英文(English) |
中文摘要 | 本研究採用有兩個同心內網管的改良氣舉式發酵槽培養Absidia coreulea 菌種, 發酵生產幾丁聚醣。在此發酵過程中微生物對溶氧的需求很高,且對剪應力的強度敏感。改 良後的氣舉式發酵槽有足夠的氣液質傳能力和較低剪應力,提供了一個良好的菌體生長條件 。 在此發酵槽生產的幾丁聚醣產量比傳統的氣泡塔式及 600 轉的攪拌式發酵槽的產量高兩 倍, 比 300 轉的攪拌式產量高 55%。 利用所提之反應器, 分子量及去乙醯度分別為 1050kDa 及 92.5%。此值比攪拌槽中所得到之值高出很多。在 600rpm 之攪拌槽,分子量和 去乙醯度分別為 710 kDa 及 85.2% 在 300 rpm,其值為 820 kDa 及 88.1%。 採用氣泡塔 ,分子量及去乙醯度分別為 950 kDa 及 92.2%。 |
英文摘要 | Cultivation of Absidia coerulea for chitosan production was carried out in a modified airlift reactor with two concentric wire mesh draft tubes. The oxygen requirement for the cultivation was high and the microorganisms were sensitive to shear stress. The modified reactor which had high oxygen transfer capability provided a suitable environment for the cultivation. Production of chitosan in the modified reactor was more than two times higher than those in both the conventional bubble column and the stirred tank fermenter with impeller speed of 600 rpm and 55% higher than that in the stirred tank fermenter with the impeller speed of 300 rpm. By using the proposed reactor, the molecular weight and degree of deacetylation of chitosan at the end of 65 hr cultivation were 1050 kDa and 92.5%, respectively, which were much higher than those using the stirred tank fermenter. The values were 710 kDa and 85.2% for the stirred tank fermenter with impeller speed of 600 rpm; 820 kDa and 88.1% for the stirred tank fermenter with impeller speed of 300 rpm. By using the bubble column, the molecular weight and of deacetylation were 950 kDa and 92.2%, respectively. |
本系統中英文摘要資訊取自各篇刊載內容。