Pretreatments of lignocellulosic and algal biomasses for sustainable biohydrogen production: Recent progress, carbon neutrality, and circular economy
Authors and Affiliations
Authors and Affiliations
Euntae Yanga,1, Kangmin Chonb,c,1, Kyoung-Yeol Kimd, Giang T.H.Lee,f, Hai Yen Nguyene,f, Trang T.Q. Lee,f, Ha T.T. Nguyene,f, Mi-Ri Jaee,f, Ishaq Ahmada, Sang-Eun Ohg, Kyu-Jung Chaee,f
aDepartment of Marine Environmental Engineering, Gyeongsang National University, Gyeongsangnam-do 53064, Republic of Korea
bDepartment of Integrated Energy and Infrasystem, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do 24341, Republic of Korea
cDepartment of Environmental Engineering, College of Engineering, Kangwon National University, Kangwondaehak-gil 1, Chuncheon-si, Gangwon-do 24341, Republic of Korea
dDepartment of Environmental and Sustainable Engineering, University at Albany, State University of New York, Albany, NY 12222, United States
eDepartment of Environmental Engineering, College of Ocean Science and Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan 49112, Republic of Korea
fInterdisciplinary Major of Ocean Renewable Energy Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan 49112, Republic of Korea
gDepartment of Biological Environment, Kangwon National University, Kangwondaehak-gil, 1, Chuncheon-si, Gangwon-do 24341, Republic of Korea
1These authors contributed equally to this work and should be considered as co-first authors.
Corresponding author: Kyu-Jung Chae
Lignocellulosic and algal biomasses are known to be vital feedstocks to establish a green hydrogen supply chain toward achieving a carbon-neutral society. However, one of the most pressing issues to be addressed is the low digestibility of these biomasses in biorefinery processes, such as dark fermentation, to produce green hydrogen. To date, various pretreatment approaches, such as physical, chemical, and biological methods, have been examined to enhance feedstock digestibility. However, neither systematic reviews of pretreatment to promote biohydrogen production in dark fermentation nor economic feasibility analyses have been conducted. Thus, this study offers a comprehensive review of current biomass pretreatment methods to promote biohydrogen production in dark fermentation. In addition, this review has provided comparative analyses of the technological and economic feasibility of existing pretreatment techniques and discussed the prospects of the pretreatments from the standpoint of carbon neutrality and circular economy.