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Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1

In the present work, the effects of dual impeller configurations comprising of Rushton turbine (RT) and Concave-bladed disk turbine (CD-6) on the oxygen transfer profile and fermentation performance of kojic acid production by Aspergillus flavus Link 44-1 was investigated. Batch cultivations of A. f...

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Main Authors: Suhaili, Nurashikin, Tan, Joo Shun, Mohamed, Mohd-Shamzi, Halim, Murni, Ariff, A. B.
Format: Article
Language:English
Published: Curtin University of Technology and John Wiley & Sons 2015
Online Access:http://psasir.upm.edu.my/id/eprint/57078/1/Effects%20of%20dual%20impeller%20system%20of%20Rushton%20turbine%2C%20concave%20disk%20turbine%20and%20their%20combinations%20on%20the%20performance%20of%20kojic%20acid%20fermentation%20by%20Aspergillus%20flavus%20Link%2044-1.pdf
http://psasir.upm.edu.my/id/eprint/57078/
http://onlinelibrary.wiley.com/wol1/doi/10.1002/apj.1846/abstract
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spelling my.upm.eprints.570782017-09-07T04:10:26Z http://psasir.upm.edu.my/id/eprint/57078/ Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1 Suhaili, Nurashikin Tan, Joo Shun Mohamed, Mohd-Shamzi Halim, Murni Ariff, A. B. In the present work, the effects of dual impeller configurations comprising of Rushton turbine (RT) and Concave-bladed disk turbine (CD-6) on the oxygen transfer profile and fermentation performance of kojic acid production by Aspergillus flavus Link 44-1 was investigated. Batch cultivations of A. flavus Link 44-1 were performed in 2 L stirred tank bioreactor. The fermentations were conducted using different dual impeller systems; (1) RT-RT, (2) CD6-CD6, (3) RT-CD6, and (4) CD6-RT (bottom-top impeller). It was perceived that dual CD-6 system was able to improve oxygen transfer rate by about 25–45% over the hybrids of RT and CD-6 and the typically configured dual RT system. While no substantial disparity could be seen on the fungal growth rate by the manipulation of the impeller, high concentration of kojic acid (44.93 g L−1) was attained with the use of dual CD-6 as the mixer. Efficient agitating system that can facilitate good gas dispersion capability is crucially required in order to counteract the problem of oxygen solubility limitation faced in such viscous fungal fermentation broth. The results from this work suggested the promising capability of dual CD-6 configuration in enhancing productivity of kojic acid fermentation in stirred tank bioreactor. Curtin University of Technology and John Wiley & Sons 2015 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/57078/1/Effects%20of%20dual%20impeller%20system%20of%20Rushton%20turbine%2C%20concave%20disk%20turbine%20and%20their%20combinations%20on%20the%20performance%20of%20kojic%20acid%20fermentation%20by%20Aspergillus%20flavus%20Link%2044-1.pdf Suhaili, Nurashikin and Tan, Joo Shun and Mohamed, Mohd-Shamzi and Halim, Murni and Ariff, A. B. (2015) Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1. Asia-Pacific Journal of Chemical Engineering, 10 (1). pp. 65-74. ISSN 1932-2135; ESSN: 1932-2143 http://onlinelibrary.wiley.com/wol1/doi/10.1002/apj.1846/abstract 10.1002/apj.1846
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description In the present work, the effects of dual impeller configurations comprising of Rushton turbine (RT) and Concave-bladed disk turbine (CD-6) on the oxygen transfer profile and fermentation performance of kojic acid production by Aspergillus flavus Link 44-1 was investigated. Batch cultivations of A. flavus Link 44-1 were performed in 2 L stirred tank bioreactor. The fermentations were conducted using different dual impeller systems; (1) RT-RT, (2) CD6-CD6, (3) RT-CD6, and (4) CD6-RT (bottom-top impeller). It was perceived that dual CD-6 system was able to improve oxygen transfer rate by about 25–45% over the hybrids of RT and CD-6 and the typically configured dual RT system. While no substantial disparity could be seen on the fungal growth rate by the manipulation of the impeller, high concentration of kojic acid (44.93 g L−1) was attained with the use of dual CD-6 as the mixer. Efficient agitating system that can facilitate good gas dispersion capability is crucially required in order to counteract the problem of oxygen solubility limitation faced in such viscous fungal fermentation broth. The results from this work suggested the promising capability of dual CD-6 configuration in enhancing productivity of kojic acid fermentation in stirred tank bioreactor.
format Article
author Suhaili, Nurashikin
Tan, Joo Shun
Mohamed, Mohd-Shamzi
Halim, Murni
Ariff, A. B.
spellingShingle Suhaili, Nurashikin
Tan, Joo Shun
Mohamed, Mohd-Shamzi
Halim, Murni
Ariff, A. B.
Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1
author_facet Suhaili, Nurashikin
Tan, Joo Shun
Mohamed, Mohd-Shamzi
Halim, Murni
Ariff, A. B.
author_sort Suhaili, Nurashikin
title Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1
title_short Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1
title_full Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1
title_fullStr Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1
title_full_unstemmed Effects of dual impeller system of Rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by Aspergillus flavus Link 44-1
title_sort effects of dual impeller system of rushton turbine, concave disk turbine and their combinations on the performance of kojic acid fermentation by aspergillus flavus link 44-1
publisher Curtin University of Technology and John Wiley & Sons
publishDate 2015
url http://psasir.upm.edu.my/id/eprint/57078/1/Effects%20of%20dual%20impeller%20system%20of%20Rushton%20turbine%2C%20concave%20disk%20turbine%20and%20their%20combinations%20on%20the%20performance%20of%20kojic%20acid%20fermentation%20by%20Aspergillus%20flavus%20Link%2044-1.pdf
http://psasir.upm.edu.my/id/eprint/57078/
http://onlinelibrary.wiley.com/wol1/doi/10.1002/apj.1846/abstract
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score 13.211869

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