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Assessing the Effect of Pretreatments on the Structure and Functionality of Microbial Communities for the Bioconversion of Microalgae to Biogas

Frontiers in microbiology, 2018-06, Vol.9, p.1388-1388 [Peer Reviewed Journal]

Copyright © 2018 Córdova, Chamy, Guerrero and Sánchez-Rodríguez. 2018 Córdova, Chamy, Guerrero and Sánchez-Rodríguez ;ISSN: 1664-302X ;EISSN: 1664-302X ;DOI: 10.3389/fmicb.2018.01388 ;PMID: 29997601

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  • Title:
    Assessing the Effect of Pretreatments on the Structure and Functionality of Microbial Communities for the Bioconversion of Microalgae to Biogas
  • Author: Córdova, Olivia ; Chamy, Rolando ; Guerrero, Lorna ; Sánchez-Rodríguez, Aminael
  • Subjects: bioconversion ; biogas ; Chlorella ; enzymatic pretreatment ; methane ; microalgae ; Microbiology
  • Is Part Of: Frontiers in microbiology, 2018-06, Vol.9, p.1388-1388
  • Description: Microalgae biomethanization is driven by anaerobic sludge associated microorganisms and is generally limited by the incomplete hydrolysis of the microalgae cell wall, which results in a low availability of microalgal biomass for the methanogenic community. The application of enzymatic pretreatments, e.g., with hydrolytic enzymes, is among the strategies used to work around the incomplete hydrolysis of the microalgae cell wall. Despite the proven efficacy of these pretreatments in increasing biomethanization, the changes that a given pretreatment may cause to the anaerobic sludge associated microorganisms during biomethanization are still unknown. This study evaluated the changes in the expression of the metatranscriptome of anaerobic sludge associated microorganisms during biomethanization without pretreatment (WP) (control) and pretreated with commercial cellulase in order to increase the solubilization of the microalgal organic matter. Pretreated microalgal biomass experienced significant increases in biogas the production. The metatranscriptomic analysis of control samples showed functionally active microalgae cells, a bacterial community dominated by γ- and δ-proteobacteria, and a methanogenic community dominated by . In contrast, pretreated samples were characterized by the absence of active microalgae cells and a bacteria population dominated by species of the Clostridia class. These differences are also related to the differential activation of metabolic pathways e.g., those associated with the degradation of organic matter during its biomethanization.
  • Publisher: Switzerland: Frontiers Media S.A
  • Language: English
  • Identifier: ISSN: 1664-302X
    EISSN: 1664-302X
    DOI: 10.3389/fmicb.2018.01388
    PMID: 29997601
  • Source: GFMER Free Medical Journals
    PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
    DOAJ Directory of Open Access Journals
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