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Bioresour. Technol., Apr 29 2024, S0960-8524(24)00462-0 | https://doi.org/10.1016/j.biortech.2024.130759 Methanotrophs mediated biogas valorization: Sustainable route to polyhydroxybutyrate production

Seung Woon Hyun, Shyam Krishna, Tin Hoang Trung Chau, Eun Yeol Lee

Department of Chemical Engineering (BK21 FOUR Integrated Engineering), Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea

Corresponding author : Eun Yeol Lee

Abstract

This study explores the ability of methanotrophs to convert biogas into biopolymers, addressing H ₂S as a limitation in the utilization of biogas as a carbon source for bioconversion. Transcriptomic analysis was conducted to understand the growth and changes in the expression patterns of Type I and II methanotrophs under varying H ₂S concentrations. Results suggested that Type II methanotrophs can possess a native H ₂S utilization pathway. Both Type I and II methanotrophs were evaluated for their growth and polyhydroxybutyrate (PHB) production from biogas. Methylocystis sp. MJC1 and Methylocystis sp. OK1 exhibited a maximum biomass production of 4.0 and 4.5 gDCW/L, respectively, in fed-batch culture, aligning with the transcriptome data. Furthermore, Methylocystis sp. MJC1 produced 2.9 g PHB/L from biogas through gas fermentation. These findings underscore biogas-based biotechnology as an innovative solution for environmental and industrial challenges with further optimization and productivity enhancement research expected to broaden the potential in this field.

논문정보

형식Research article
게재일2024년 04월 (BRIC 등록일 2024-05-03)
연구진국내 연구진
분야 생명과학 > 생물공학

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