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

✍ Scribed by Alberto Vergara-Fernández; Gisela Vargas; Nelson Alarcón; Antonio Velasco

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
316 KB
Volume
32
Category
Article
ISSN
0961-9534

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✦ Synopsis

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(71.5) mL g À1 dry algae d À1 , 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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