Mass transfer performance for multiple-impeller bioreactor in cold model and fermentation experiments

doi:10.11949/j.issn.0438-1157.20151809

CIESC Journal ›› 2016, Vol. 67 ›› Issue (S1): 224-231.DOI: 10.11949/j.issn.0438-1157.20151809

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Mass transfer performance for multiple-impeller bioreactor in cold model and fermentation experiments

XIE Minghui¹, LU Hongzhong², TANG Wenjun², XIA Jianye², ZHANG Siliang², ZHOU Guozhong¹, YU Peiqing¹

1 Zhejiang Great Wall Mixers Co., Ltd., Wenzhou 325019, Zhejiang, China;
2 State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2015-12-01 Revised:2015-12-10 Online:2016-08-31 Published:2016-08-31
Supported by:
supported by the Major Program of Zhejiang Province of China (2013C01138) and the Fundamental Research Funds for the Central Universities (222201413037).

多层搅拌式生物反应器内冷模和热模的传质特性

谢明辉¹, 鲁洪中², 唐文俊², 夏建业², 张嗣良², 周国忠¹, 虞培清¹

1 浙江长城搅拌设备股份有限公司, 浙江温州 325019;
2 华东理工大学生物反应器工程国家重点实验室, 上海 200237

通讯作者: 夏建业,jyxia@ecust.edu.cn;周国忠,zgz@aaar.com.cn
基金资助:
浙江省科技计划重大专项（2013C01138）；中央高校基本科研业务费专项资金项目（222201414037）。

Abstract

Abstract:

Carboxyl methyl cellulose (CMC) solutions with different concentrations simulating different mycelial fermentation broth were used for the study of mass transfer characteristics in bioreactor. Two impeller combinations (triple Rushton turbines, 3PY and bottom hollow blade turbine combined with upper two up-pumping hydrofoils (3 blades), HY+2KCXu) were employed. Under low CMC concentration condition, impeller combination of HY+2KCXu showed better mass transfer capacity. Fermentation of Aspergillus niger with production of glucoamylase was conducted under the two impeller combinations. In order to keep the similar oxygen uptake rate (OUR) among the two combinations, impeller rotation speed of the two configurations was adjusted respectively. Ultimately, based on the investigation of enzyme production, biomass amount, broth rheology and also mass transfer capacity of impellers, conclusions were gotten:apparent viscosity of broth in fermentation with HY+2KCXu was lower than that with 3PY. It seemed that in fermenter equipped with HY+2KCXu pellet prevailed than mycelia, thus lower viscosity was resulted, which in turn increased the mass transfer capacity of the system, that may be the reason why this impeller combination can gave higher product titer.

Key words: impeller combination, non-Newtonian fluid, mass transfer, fermentation, mycelial fungi, bioreactor

摘要：

采用不同浓度的羧甲基纤维素钠（CMC）溶液替代菌丝发酵液进行两种桨型组合（三层平直叶圆盘涡轮，3PY和底层半圆管圆盘涡轮HY及上面两层三宽叶翼型轴流桨KCXu，HY+2KCXu）的功率消耗和体积氧传质系数研究。结果表明：相同功率下，低浓度CMC溶液中上翻操作的HY+2KCXu组合的传质能力更好，但是随着黏度的增加，两种组合的传质能力趋于相同。同时采用两种桨型组合进行黑曲霉产糖化酶的发酵实验，通过调节转速实现两种桨型下发酵罐内菌体的氧摄取速率相近，通过对产酶量、菌形、发酵液流变特性以及反应器内的传质能力对比研究发现：发酵过程中装有HY+2KCXu组合的罐内发酵液的表观黏度低于装有3PY组合的罐，HY+2KCXu罐内似乎更容易形成菌球，菌球的形成降低了发酵液的黏度，传质系数增大，从而提高了产酶效率。

关键词: 桨型组合, 非牛顿流体, 传质, 发酵, 丝状菌, 生物反应器

CLC Number:

TQ027.2

XIE Minghui, LU Hongzhong, TANG Wenjun, XIA Jianye, ZHANG Siliang, ZHOU Guozhong, YU Peiqing. Mass transfer performance for multiple-impeller bioreactor in cold model and fermentation experiments[J]. CIESC Journal, 2016, 67(S1): 224-231.

谢明辉, 鲁洪中, 唐文俊, 夏建业, 张嗣良, 周国忠, 虞培清. 多层搅拌式生物反应器内冷模和热模的传质特性[J]. 化工学报, 2016, 67(S1): 224-231.

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Mass transfer performance for multiple-impeller bioreactor in cold model and fermentation experiments

多层搅拌式生物反应器内冷模和热模的传质特性

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