Biogas production from Macrocystis pyrifera biomass in seawater system. (December 2015)

• Record Type: Journal Article
• Authors: Fan, Xiaolei; Guo, Rongbo; Yuan, Xianzheng; Qiu, Yanling; Yang, Zhiman; Wang, Fei; Sun, Mengting; Zhao, Xiaoxian
• Is Part Of: Bioresource technology. Volume 197(2015)
• Page Start: 339
• Page End: 347
• Publication Date: 2015-12
• Subjects: Anaerobic fermentation -- Marine sediments -- Macrocystis pyrifera -- Methanogenetic pathway -- Sulfate; 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.2015.08.128
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Raw seaweed was converted to biomethane efficiently in real seawater system. Microbe in the littoral sediment showed the higher methanogenesis activity. Microbial communities in thalassic biogas production system were first studied. Abstract: Marine sediments from littoral and sublittoral location were evaluated as inocula for methane production from anaerobic fermentation of Macrocystis pyrifera in seawater system. Littoral sediment showed the higher methanogenetic activity from acetate and resulted in a higher biomethane yield of 217.1 ± 2.4 mL/g-VS, which was comparable with that reported in freshwater system with desalted seaweeds. With 0.8 mM sodium molybdate added, both the maximal methane yield and concentration increased while the lag-time was greatly shortened, suggesting that sulfate was one of the major inhibitors. Microbial community analysis revealed that degradation of M. pyrifera needed cooperation of very complex microbial populations. Hydrogenotrophic methanogens had an absolute dominance in distribution compared with the acetotrophic ones, indicating syntrophic acetate oxidation coupled to hydrogenotrophic methanogenesis might play important roles in the thalassic anaerobic fermentation system. These results clearly showed that biomethane production of raw seaweeds in seawater system was feasible.