Biohythane production from marine macroalgae Sargassum sp. coupling dark fermentation and anaerobic digestion. (August 2015)

• Record Type: Journal Article
• Authors: Costa, José C.; Oliveira, João V.; Pereira, Maria A.; Alves, Maria M.; Abreu, Angela A.
• Is Part Of: Bioresource technology. Volume 190(2015)
• Page Start: 251
• Page End: 256
• Publication Date: 2015-08
• Subjects: Biohythane -- Marine biomass -- Sargassum sp. -- Biohydrogen -- Caldicellulosiruptor saccharolyticus; 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.2015.04.052
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Biohythane production from Sargassum sp. is feasible and has a high potential. Hydrogen yield of 91.3 ± 3.3 L H2 per kg (VS) of Sargassum sp. was attained. It was achieved a methane yield of 541 ± 10 L CH4 per kg (VS) of Sargassum sp. Potential energy production from Sargassum sp. was estimated in 242 GJ ha −1 yr −1 . The value of estimated energy could result in 600 EJ yr −1 . Abstract: Potential biohythane production from Sargassum sp. was evaluated in a two stage process. In the first stage, hydrogen dark fermentation was performed by Caldicellulosiruptor saccharolyticus . Sargassum sp. concentrations (VS) of 2.5, 4.9 and 7.4 g L −1 and initial inoculum concentrations (CDW) of 0.04 and 0.09 g L −1 of C. saccharolyticus were used in substrate/inoculum ratios ranging from 28 to 123. The end products from hydrogen production process were subsequently used for biogas production. The highest hydrogen and methane production yields, 91.3 ± 3.3 L kg −1 and 541 ± 10 L kg −1, respectively, were achieved with 2.5 g L −1 of Sargassum sp. (VS) and 0.09 g L −1 of inoculum (CDW). The biogas produced contained 14–20% of hydrogen. Potential energy production from Sargassum sp. in two stage process was estimated in 242 GJ ha −1 yr −1 . A maximum energy supply of 600 EJ yr −1 could be obtained from the ocean potential area for macroalgae production.