alexa Study the Relation between Fermentation Characteristics of Submerged Fluid and Improving the Lactic Acid Production by Fungi | OMICS International | Abstract
ISSN: 2155-9821

Journal of Bioprocessing & Biotechniques
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Research Article

Study the Relation between Fermentation Characteristics of Submerged Fluid and Improving the Lactic Acid Production by Fungi

Narges Ghobadi1*, Nobuhiro Yuge1, Naoya Sasakura1, Satoshi Wakai1, Chiaki Ogino2, Kaoru Yamabe3 and Naoto Ohmura1

1Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Hyogo, 657-8501, Japan

2Organization of Advanced Science and Technology, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Hyogo, 657-8501, Japan

3Division of Process Equipment, Kobelco Eco-Solutions, Co. LTD., 19, Nijima, Harimacho, Kakogun, Hyogo 675-0155, Japan

*Corresponding Author:
Narges Ghobadi
Department of Chemical Science and Engineering
Graduate School of Engineering, Kobe University
1-1 Rokkodai-cho, Nada-ku, Hyogo
657-8501, Japan
Tel: +81 78 803 6176
E-mail: [email protected]

Received date: February 10, 2017; Accepted date: February 17, 2017; Published date: February 21, 2017

Citation: Ghobadi N, Yuge N, Sasakura N, Wakai S, Ogino C, et al. (2017) Study the Relation between Fermentation Characteristics of Submerged Fluid and Improving the Lactic Acid Production by Fungi. J Bioprocess Biotech 7:300.doi:10.4172/2155-9821.1000300

Copyright: © 2017 Ghobadi N, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

In this study, it was shown that how rheology and fluid dynamics effected the behavior of cell growth and L-Lactic acid productivity during cultivation of filamentous fungi (Aspergillus oryzae) in a stirred-tank. Submerged culture of A. oryzae was a shear-thinning fluid with complex rheology and morphology. It is a shear-sensitive fluid. The scope of this study, was enhancing the gas-liquid flow of fermentation fluid to improve the liquid-gas mass transfer, L-lactic acid production and stagnant zone reduction at low energy consumption by effective shear rate generation using multi-large blade agitator with global axial pattern of mixing. Due to this reason, the advantage of Fullzone® (FZ), and impeller was investigated. Experimental results when using multi-large and multi-radial impeller, showed that the same volumetric power consumption of the dissolved oxygen concentration, Re, macro and micro-morphology size, biomass and L-lactic acid production when using multi large impeller was higher and more stable than that of the multi radial impeller. Most of above positive properties were due to the reduction in viscosity and apparent consistence index of fermented fluid.

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