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

Alberto Vergara, Gisela Vargas, Nelson Alarcón, Antonio Velasco

Research output: Contribution to journalArticlepeer-review

193 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)338-344
Number of pages7
JournalBiomass and Bioenergy
Volume32
Issue number4
DOIs
StatePublished - Apr 2008
Externally publishedYes

Keywords

  • ASBR
  • Durvillea antarctica
  • Macrocystis pyrifera
  • Methane
  • Renewable energy
  • Two-phase anaerobic digestion
  • UAF

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