戴建英   

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Language:English

Paper Publications

Title of Paper:2,3-丁二醇的发酵及盐析分离工艺

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Date of Publication:2009-02-15

Journal:生物加工过程

Included Journals:ISTIC、CSCD

Volume:7

Issue:1

Page Number:44-48

ISSN No.:1672-3678

Key Words:2,3-丁二醇;发酵;克雷伯氏菌;盐析

Abstract:采用克雷伯氏茵(Klebsiella pneumoniae CICC 10011)发酵生产2,3-丁二醇,并对2,3-丁二醇的盐析分离工艺进行了考察.通过实验确定了以葡萄糖为底物微氧批式流加发酵的条件,发酵液中2,3-丁二醇和3-羟基丁酮的质量浓度分别为90.98 g/L和12.40 g/L,2,3-丁二醇的摩尔转化率为82.7%,生产强度达到2.1 g/(L·h).对发酵液中2,3-丁二醇的盐析分离研究表明,K2HPO4和K3PO4对2,3-丁二醇的盐析效果优于K2CO3当发酵液浓缩70%后,加入质量分数为45%的K2HPO4,2,3-丁二醇的分配系数达到9.10,回收率为79.37%;上相中2,3-丁二醇的质量浓度达到420 g/L;此时3-羟基丁酮的分配系数和回收率分别为11.9和83.48%.

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