RT info:eu-repo/semantics/preprint
T1 Codigestion of sludge and citrus peel wastes: Evaluating the effect of biochar addition on microbial communities
A1 Martínez, E. Judith
A1 Rosas, José Guillermo
A1 Sotres, Ana
A1 Morán Palao, Antonio
A1 Cara Jiménez, Jorge
A1 Sánchez, Marta Elena
A1 Gómez Barrios, Xiomar Arleth
A2 Ingenieria Quimica
K1 Ingeniería química
K1 Ingeniería Ambiental
K1 Bioprocesos
K1 Anaerobic digestion
K1 Biochar
K1 High throughput sequencing
K1 Orange peel wastes
K1 Sewage sludge
AB 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
PB Elsevier
YR 2019
FD 2019-02-11
LK http://hdl.handle.net/10612/9570
UL http://hdl.handle.net/10612/9570
NO Biochemical Engineering Journal, 2018, n. 137
NO P. 314–325
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 26-abr-2024