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Bioresour Technol. 2017 Sep;239:387-393. doi: 10.1016/j.biortech.2017.05.023. Epub 2017 May 6.

Determination of volumetric gas-liquid mass transfer coefficient of carbon monoxide in a batch cultivation system using kinetic simulations.

Author information

1
School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
2
Department of Chemical Engineering, COMSATS Institute of Information Technology (CIIT), Lahore, Pakistan.
3
College of Engineering, Center of Complex Fluids Processing, Multidisciplinary Nanotechnology Centre, Swansea University, Swansea SA2 8PP, UK.
4
School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea. Electronic address: ischang@gist.ac.kr.

Abstract

A mathematical model of microbial kinetics was introduced to predict the overall volumetric gas-liquid mass transfer coefficient (kLa) of carbon monoxide (CO) in a batch cultivation system. The cell concentration (X), acetate concentration (Cace), headspace gas (Nco and [Formula: see text] ), dissolved CO concentration in the fermentation medium (Cco), and mass transfer rate (R) were simulated using a variety of kLa values. The simulated results showed excellent agreement with the experimental data for a kLa of 13/hr. The Cco values decreased with increase in cultivation times, whereas the maximum mass transfer rate was achieved at the mid-log phase due to vigorous microbial CO consumption rate higher than R. The model suggested in this study may be applied to a variety of microbial systems involving gaseous substrates.

KEYWORDS:

Batch cultivation; Carbon monoxide; Eubacterium limosum KIST612; Gas–liquid mass transfer; Kinetic simulation

PMID:
28531864
DOI:
10.1016/j.biortech.2017.05.023
[Indexed for MEDLINE]

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