Biotechnology and Bioprocess Engineering 2024; 29(2): 377-386  
Component analysis and utilization strategy of brown macroalgae as promising feedstock for sugar platform‑based marine biorefinery
Jeongho Lee1 · Hyeonmi Shin2 · Kang Hyun Lee3 · Hyeseon Lee2 · Giwon Lee2 · Sungho Jang4 · Gyoo Yeol Jung5 · Hah Young Yoo1 · Chulhwan Park2
1 Department of Biotechnology, Sangmyung University, Seoul 03016, Korea
2 Department of Chemical Engineering, Kwangwoon University, Seoul 01897, Korea
3 Department of Bio‑Convergence Engineering, Dongyang Mirae University, Seoul 08221, Korea
4 Department of Bioengineering and Nano‑Bioengineering, Incheon National University, Incheon 22012, Korea
5 Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, Korea
Correspondence to: Hah Young Yoo
Chulhwan Park

Jeongho Lee and Hyeonmi Shin have contributed equally to this work.
Received: November 6, 2023; Revised: November 30, 2023; Accepted: December 3, 2023; Published online: February 14, 2024.
© The Korean Society for Biotechnology and Bioengineering. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Brown algae have gained attention as a sustainable feedstock for biorefineries due to their ability to sequester carbon dioxide, rapid growth, and high carbohydrate content. The carbohydrate content in brown algae has only been analyzed for a few species, and in most cases, access to fundamental data such as sugar composition is limited, which hinders the assessment of brown algal biomass-based biorefining potential. In this study, the carbohydrate composition of brown algae (Undaria pinnatifida, Saccharina japonica, Ecklonia cava, and Ecklonia stolonifera) was analyzed in detail and application directions were proposed. As a result, alginate and glucan were detected in all resources, and the contents (alginate and glucan wt%) were as follows: U. pinnatifida (39.6 and 4.9 wt%), S. japonica (34.0 and 6.3 wt%), E. cava (24.3 and 7.7 wt%), and E. stolonifera (39.1 and 9.7 wt%). All feedstocks contain trace amounts (2.9–4.9 wt%) or no xylan-mannan-galactan. Mannitol was detected only in S. japonica (26.7 wt%) in rich, showing high potential as a biorefinery feedstock. We highlight that the carbohydrate composition of E. cava and E. stolonifera was analyzed for the first time and the potential use of brown algal biomass in a biorefinery approach.
Keywords: Brown algae · Carbohydrate · Alginate · Biorefinery · Process strategy · Ecklonia

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