Evaluation of marine algae as a source of biogas in a two-stage anaerobic reactor system

Ingeniería Civil Ambiental - Ingeniería en Acuicultura - Ingeniería en Recursos Naturales Renovables
Facultad de Recursos Naturales
Fecha de publicación:
Datos de publicación:
Biomass and BioenergyBiomass and Bioenergy, Vol.32, N°4, 338-344, 2008
Algas marinas - Biogas - Energía renovable
The marine algae are considered an important biomass source; however, their utilization as energy source is still low around the world. The technical feasibility of marine algae utilization as a source of renewable energy was studied to laboratory scale. The anaerobic digestion of Macrocystis pyrifera, Durvillea antarctica and their blend 1:1 (w/w) was evaluated in a two-phase anaerobic digestion system, which consisted of an anaerobic sequencing batch reactor (ASBR) and an upflow anaerobic filter (UAF). The results show that 70% of the total biogas produced in the system was generated in the UAF, and both algae species have similar biogas productions of 180.4(±1.5) mL g-1 dry algae d-1, with a methane concentration around 65%. The same methane content was observed in biogas yield of algae blend; however, a lower biogas yield was obtained. In conclusion, either algae species or their blend can be utilized to produce methane gas in a two-phase digestion system.

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