Conversion of carbon dioxide in biogas into acetic acid by Clostridium thailandense immobilized on porous support materials
Issued Date
2024-02-29
Resource Type
ISSN
24058440
Scopus ID
2-s2.0-85186327447
Journal Title
Heliyon
Volume
10
Issue
4
Rights Holder(s)
SCOPUS
Bibliographic Citation
Heliyon Vol.10 No.4 (2024)
Suggested Citation
Chaikitkaew S., Wongfaed N., Mamimin C., O-Thong S., Reungsang A. Conversion of carbon dioxide in biogas into acetic acid by Clostridium thailandense immobilized on porous support materials. Heliyon Vol.10 No.4 (2024). doi:10.1016/j.heliyon.2024.e26378 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/97571
Title
Conversion of carbon dioxide in biogas into acetic acid by Clostridium thailandense immobilized on porous support materials
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Abstract
This study aimed to convert CO2 in biogas into acetic acid using immobilized Clostridium thailandense cells on various support materials, including activated carbon, expanded clay, and coir. Immobilized cells and free cells were evaluated for their CO2 conversion ability into acetic acid using H2 as an electron donor at an H2 to CO2 in biogas ratio of 2:1 (v/v), 30 °C, 150 rpm. Results showed that immobilized cells on activated carbon increased CH4 content to 96.9% (v/v), and acetic acid production to 15.65 mmol/L within 96 h. These values outperformed free cells. The activated carbon-immobilized cells could be reused two times without losing efficacy in the purification of biogas and acetic acid production. This work indicates that using the immobilized cells offers a sustainable approach to biogas upgrading, reducing the environmental footprint of biogas production by increasing its energy content and purity.