Enhancement of oxygen mass transfer and gas holdup using palm oil in stirred tank bioreactors with xanthan solutions as simulated viscous fermentation broths
Volumetric mass transfer coefficient (k L a) is an important parameter in bioreactors handling viscous fermentations such as xanthan gum production, as it affects the reactor performance and productivity. Published literatures showed that adding an organic phase such as hydrocarbons or vegetable oil...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2013
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| Subjects: | |
| Online Access: | View Fulltext in Publisher View in Scopus |
| LEADER | 03088nam a2200577Ia 4500 | ||
|---|---|---|---|
| 001 | 10.1155-2013-409675 | ||
| 008 | 220112s2013 CNT 000 0 und d | ||
| 020 | |a 23146133 (ISSN) | ||
| 245 | 1 | 0 | |a Enhancement of oxygen mass transfer and gas holdup using palm oil in stirred tank bioreactors with xanthan solutions as simulated viscous fermentation broths |
| 260 | 0 | |b Hindawi Limited |c 2013 | |
| 856 | |z View Fulltext in Publisher |u https://doi.org/10.1155/2013/409675 | ||
| 856 | |z View in Scopus |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-84890076318&doi=10.1155%2f2013%2f409675&partnerID=40&md5=c596a311e43d5af291053c6d9ff7242d | ||
| 520 | 3 | |a Volumetric mass transfer coefficient (k L a) is an important parameter in bioreactors handling viscous fermentations such as xanthan gum production, as it affects the reactor performance and productivity. Published literatures showed that adding an organic phase such as hydrocarbons or vegetable oil could increase the k L a. The present study opted for palm oil as the organic phase as it is plentiful in Malaysia. Experiments were carried out to study the effect of viscosity, gas holdup, and k L a on the xanthan solution with different palm oil fractions by varying the agitation rate and aeration rate in a 5 L bench-top bioreactor fitted with twin Rushton turbines. Results showed that 10% (v/v) of palm oil raised the k L a of xanthan solution by 1.5 to 3 folds with the highest k L a value of 84.44 h-1. It was also found that palm oil increased the gas holdup and viscosity of the xanthan solution. The k L a values obtained as a function of power input, superficial gas velocity, and palm oil fraction were validated by two different empirical equations. Similarly, the gas holdup obtained as a function of power input and superficial gas velocity was validated by another empirical equation. All correlations were found to fit well with higher determination coefficients. © 2013 Suhaila Mohd Sauid et al. | |
| 650 | 0 | 4 | |a aeration |
| 650 | 0 | 4 | |a article |
| 650 | 0 | 4 | |a bacterial polysaccharide |
| 650 | 0 | 4 | |a bioreactor |
| 650 | 0 | 4 | |a Bioreactors |
| 650 | 0 | 4 | |a Culture Media |
| 650 | 0 | 4 | |a culture medium |
| 650 | 0 | 4 | |a experimental study |
| 650 | 0 | 4 | |a fermentation |
| 650 | 0 | 4 | |a Fermentation |
| 650 | 0 | 4 | |a flow kinetics |
| 650 | 0 | 4 | |a gas |
| 650 | 0 | 4 | |a gas analysis |
| 650 | 0 | 4 | |a Gases |
| 650 | 0 | 4 | |a Malaysia |
| 650 | 0 | 4 | |a mass |
| 650 | 0 | 4 | |a metabolism |
| 650 | 0 | 4 | |a molecular weight |
| 650 | 0 | 4 | |a Molecular Weight |
| 650 | 0 | 4 | |a oxygen |
| 650 | 0 | 4 | |a Oxygen |
| 650 | 0 | 4 | |a palm oil |
| 650 | 0 | 4 | |a physiology |
| 650 | 0 | 4 | |a Plant Oils |
| 650 | 0 | 4 | |a Polysaccharides, Bacterial |
| 650 | 0 | 4 | |a solution and solubility |
| 650 | 0 | 4 | |a Solutions |
| 650 | 0 | 4 | |a stirred reactor |
| 650 | 0 | 4 | |a surface tension |
| 650 | 0 | 4 | |a vegetable oil |
| 650 | 0 | 4 | |a viscometry |
| 650 | 0 | 4 | |a viscosity |
| 650 | 0 | 4 | |a xanthan |
| 700 | 1 | 0 | |a Huey Ling, T. |e author |
| 700 | 1 | 0 | |a Krishnan, J. |e author |
| 700 | 1 | 0 | |a Mohd Sauid, S. |e author |
| 700 | 1 | 0 | |a Veluri, M.V.P.S. |e author |
| 773 | |t BioMed Research International | ||