이연지 (한국과학기술연구원, 고려대학교) | 한빛사논문 > 한빛사

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한국과학기술연구원, 고려대학교

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Water Res., Oct 04 2024, 268 (Pt A) S0043-1354(24)01475-1 | https://doi.org/10.1016/j.watres.2024.122576 Sustainable production of microbial protein from carbon dioxide in the integrated bioelectrochemical system using recycled nitrogen sources

Yeon Ji Lee ^a,e, Byeong Cheul Moon ^b, Dong Ki Lee ^a,c, Jung Ho Ahn ^a,c, Gyeongtaek Gong ^a,c, Youngsoon Um ^a,c, Sun-Mi Lee^d, Kyoung Heon Kim ^e, Ja Kyong Ko ^a,c

^aClean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea

^bWater Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea

^cDivision of Energy and Environment Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea

^dDepartment of Environmental Science & Ecological Engineering, Korea University, Seoul 02841, Republic of Korea

^eDepartment of Biotechnology, Korea University, Seoul 02841, Republic of Korea

Corresponding author : Ja Kyong Ko

Abstract

Given the urgency of climate change, it is imperative to develop innovative technologies for repurposing CO₂ into value-added products to achieve carbon neutrality. Additionally, repurposing nitrogen-source-derived wastewater streams is crucial, focusing on sustainability rather than conventional nitrogen removal in wastewater treatment plants. In this context, microbial protein (MP) production presents a sustainable and promising approach for transforming recovered low-value resources into high-quality feed and food. We assessed MP production by hydrogen-oxidizing bacteria (HOB) utilizing CO₂ and various nitrogen sources. Specifically, we investigated MP production by two different HOB strains, Cupriavidus necator H16 and Xanthobacter viscosus 7d, within an integrated water-splitting biosynthetic system that generates in situ H₂ via water electrolysis. The electroautotrophically produced MPs of C. necator H16 and X. viscosus 7d exhibited amino acid contents of 555 and 717 mg protein/g cell dry weight, with 243 and 299 mg essential amino acid/g cell dry weight, respectively. They could serve as viable alternatives to conventional food/feed sources like fishmeal or soybean protein. Ammonium-rich wastewater streams are preferable for MP production in integrated bioelectrochemical systems. This study provides valuable insights into sustainable, carbon-neutral MP production using CO₂, water, renewable electricity, and recycled nitrogen sources.

논문정보

형식Research article
게재일2024년 10월 (BRIC 등록일 2024-10-16)
연구진국내 연구진
분야 바이오·의료융합 > 바이오소재

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