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    Citas

    Título
    Codigestion of sludge and citrus peel wastes: Evaluating the effect of biochar addition on microbial communities
    Autor
    Martínez, E. Judith
    Rosas, José Guillermo
    Sotres, Ana
    Morán, Antonio
    Cara Jiménez, JorgeAutoridad BuleriaORCID
    Sánchez, Marta Elena
    Gómez, Xiomar
    Facultad/Centro
    Instituto de Medio Ambiente, Recursos Naturales y Biodiversidad de la Universidad de Léon
    Área de conocimiento
    Ingenieria Quimica
    Datos de la obra
    Biochemical Engineering Journal, 2018, n. 137
    Editor
    Elsevier
    Fecha
    2018
    Abstract
    In this study, the effects on process performance and changes in microbial populations with the addition of biochar to the anaerobic digestion of sludge and orange peels were evaluated. Biochar had a positive influence in batch digestions, leading to a decrease in the lag phase and an increase in methane yields; this was even more evident for citrus peel wastes, which reached an increase of approximately 33% when 10 g L−1 of biochar was added and 56% when 30 g L−1 was added. Particle size analysis performed for the experiments shows greater surface area available in biochar systems for biomass immobilization. Analysis of the microbial communities by means of 16S rRNA gene pyrosequencing shows that the biochar addition favoured the electro-active microorganisms consortia creating a synthrophic metabolism between eubacterial and archaeal populations, which resulted in an improvement of the anaerobic digestion performance. The codigestion of the mixture under a semicontinuous regimen showed an improvement in methane yields of approximately 60% and at hydraulic retention times of 30–20 days (reaching methane production values above 500 L CH4 kg VS−1 at an OLR of 1.49 kg VS m−3 d−1). The enhancement observe in biochar supplemented fermentations may be explained by the adsorption of inhibitors and the relatively high surface area favoured the adhesion and growth of microorganisms. This research was possible thanks to the financial support of the "Ministerio de Economía y Competitividad" and Fondo Europeo de Desarrollo Regional through the project (ref: CTQ2015-68925-R) and ‘Junta de Castilla y León, Consejería de Educación’ (ref: LE060U16) projects cofinanced by FEDER funds. A. Sotres thanks the regional ‘Junta de Castilla y León’for the postdoctoral contract associated with project ref: LE060U16
    Materia
    Ingeniería química
    Palabras clave
    Ingeniería Ambiental
    Bioprocesos
    Anaerobic digestion
    Biochar
    High throughput sequencing
    Orange peel wastes
    Sewage sludge
    URI
    http://hdl.handle.net/10612/9570
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