Microalgae digestive pretreatment for increasing biogas production

Olivia Córdova, Julissa Santis, Gonzalo Ruiz-Fillipi, María Elvira Zuñiga, Fernando G. Fermoso, Rolando Chamy

Research output: Contribution to journalReview articlepeer-review

22 Scopus citations

Abstract

Microalgae have many advantages for the production of biogas by anaerobic digestion process. However, the anaerobic digestion process has been reported to be limited in the hydrolytic stage due to the specific characteristics of the cell wall components thus resulting in an inefficient conversion of biomass to biogas. Pre-treatments aim to achieve an increase in the biogas production by increasing solubilization. Enzymatic pretreatment is described as an environmentally-friendly process, due to the low energy consumption, great yield of freed, fermentable sugars from the biomass under light operational conditions, the absence of corrosive problems, and few derivatives produced. Within the category of enzymatic pretreatments, it might identify two types, which are related to the origin of the enzymes and which may be classified as endogenous enzymes, and commercial exogenous enzymes. It should also be considered that enzyme production costs for commercial enzymes might be a negative factor in the process. The objective of the present review is to analyze and discuss the application of digestive pretreatments on the solubilization of microalgae, with a focus on the cell wall, and its relation to biogas production increase.

Original languageEnglish
Pages (from-to)2806-2813
Number of pages8
JournalRenewable and Sustainable Energy Reviews
Volume82
DOIs
StatePublished - Feb 2018
Externally publishedYes

Keywords

  • Anaerobic digestion
  • Biogas
  • Cell wall
  • Enzymes
  • Microalgae
  • Pretreatment

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