Enhancement of the hydrogen productivity in microbial water gas shift reaction by Thermococcus onnurineus NA1 using a pressurized bioreactor SCIE SCOPUS

Cited 11 time in WEB OF SCIENCE Cited 12 time in Scopus
Title
Enhancement of the hydrogen productivity in microbial water gas shift reaction by Thermococcus onnurineus NA1 using a pressurized bioreactor
Author(s)
Kim, Min-Sik; Fitriana, Hana Nur; Kim, Tae Wan; Kang, Sung Gyun; Jeon, Sang Goo; Chung, Soo Hyun; Park, Gwon Woo; Na, Jeong-Geol
KIOST Author(s)
Kang, Sung Gyun(강성균)
Publication Year
2017-11-09
Abstract
Here, we developed a pressurized bioreactor system that increase carbon monoxide (CO) transfer efficiency in order to enhance the hydrogen productivity in the microbial water gas shift reaction by Thermococcus onnurineus NA1. The effects of CO pressure on the hydrogen production rate, CO consumption rate and the cell growth were investigated using small scale stainless steel bottles at various CO partial pressures. It was found that CO solubility increased by applying pressure can affect hydrogen production positively as long as the increased toxicity of CO is endurable to cells. The hydrogen productivity increased to some extent with CO pressure, but decreased drastically at the pressure higher than 4 bar. On the other hand, the effect of pressure itself on the cells activity was not as significant as that of CO solubility increase. In the experiments at various system pressures with identical CO partial pressure of 1 bar, more than 80% of the cell activity remains even at total pressure of 10 bar. Also, it was important to determine the appropriate time to increase pressure for preventing excess CO in the reactor. Based on these results, a fermentation strategy for the pressurized system was designed and applied to a 5 L bioreactor with the continuous supply of the gas containing 60% CO. When the pressure was introduced to the bioreactor up to 4 bar at CO limitation condition, the unprecedented high productivity (360 mmol L-1 h(-1)) could be obtained. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
ISSN
0360-3199
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1115
DOI
10.1016/j.ijhydene.2017.07.024
Bibliographic Citation
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.42, no.45, pp.27593 - 27599, 2017
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
DEPENDENT H-2 PRODUCTION; HYPERTHERMOPHILIC ARCHAEON; BIOHYDROGEN PRODUCTION; CARBON-MONOXIDE; WASTE-WATER; CO; FERMENTATION; MICROFLORA; MEMBRANES; DESIGN
Keywords
Pressurized bioreactor; Carbon monoxide solubility; Microbial water gas shift reaction; Thermococcus onnurineus NA1
Type
Article
Language
English
Document Type
Article; Proceedings Paper
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

marine biotechnology,microbiology,해양생명공학,미생물학

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