Co-production of hydrogen and electricity from macroalgae by simultaneous dark fermentation and microbial fuel cell. (September 2021)

• Record Type: Journal Article
• Authors: Gebreslassie, Tamirat Redae; Nguyen, Phan Khanh Thinh; Yoon, Hyon Hee; Kim, Jihyeon
• Is Part Of: Bioresource technology. Volume 336(2021)
• Publication Date: 2021-09
• Subjects: Hydrogen -- Dark fermentation -- Electricity generation -- Microbial fuel cell -- Saccharina japonica; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125269
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A simultaneous dark fermentation and microbial fuel cell was proposed. The energy recovery was considerably improved in the hybrid process. A highly diverse microbial community was observed in the biofilm. The process can be used to produce H2 and electricity from organic substrates. The performance of sDFMFC considerably exceeded the values reported in literature. Abstract: In this study, a hybrid process of dark fermentation (DF) and microbial fuel cell (MFC), sDFMFC, was investigated for simultaneous H2 and electricity production from Saccharina japonica in a single reactor. The sDFMFC exhibited a considerably enhanced energy recovery owing to simultaneous H2 /carboxylic acids (CAs) production by DF and electricity production by MFC consuming CAs. The co-production of H2 and electricity was confirmed by a time course of CAs concentration in sDFMFC. An excellent energy recovery of 17.3% was obtained from S. japonica with H2 yield of 110 mL/g-VS and maximum power density of 1.82 W/m 2 . The sDFMFC showed a diverse microbial community for a desirable microbial conversion of organic substrates. The results indicate that sDFMFC can be a promising single reactor process to produce H2 and electricity from various biomass feedstock with considerable cost savings while ensuring the strength of the individual DF and MFC process.