RT info:eu-repo/semantics/article
T1 Integrating anaerobic digestion and pyrolysis for treating digestates derived from sewage sludge and fat wastes
A1 González-Arias, Judith
A1 Gil, María Victoria
A1 Fernández Díaz, Ramón Ángel
A1 Martínez Torres, Elia Judith
A1 Fernández, Camino
A1 Papaharalabos, George
A1 Gómez Barrios, Xiomar Arleth
A2 Ingenieria Quimica
K1 Bioquímica
K1 Ecología. Medio ambiente
K1 Ingeniería química
K1 Sludge pyrolysis
K1 Co-digestion
K1 Biogas
AB The coupling of biological and thermal technologies allows for the complete conversion of wastes into energy and biochar eliminating the problem of sludge disposal. The valorisation of fatty residues as co-substrate in a mesophilic digester of a wastewater treatment plant was studied considering an integrated approach of co-digestion and pyrolysis. Four digested samples obtained from co-digestion of sewage sludge and butcher’s fat waste were studied by thermogravimetric analysis. The activation energy corresponding to the sludge pyrolysis was calculated by a non-isothermal kinetic. Arrhenius activation energy was lower for the pyrolysis of a digested grease sample (92 kJ mol−1 obtained by OFW and 86 kJ mol−1 obtained by Vyazovkin) than for the pyrolysis of sewage sludge and its blends (164–190 kJ mol−1 obtained by OFW and 162–190 kJ mol−1 obtained by Vyazovkin). The analysis of the integrated approach of anaerobic co-digestion and pyrolysis of digestates demonstrated that the addition of 3% (w/v) of fat to the feeding sludge results in a 25% increase in the electricity obtained from biogas (if a combined heat and power unit is considered for biogas valorisation) and increasing the fat content to 15% allows for covering all thermal needs for drying of digestate and more than doubles (2.4 times) the electricity production when the scenario of digestion and pyrolysis is contemplated.
PB Springer
SN 0944-1344
LK http://hdl.handle.net/10612/13541
UL http://hdl.handle.net/10612/13541
NO P. 32603-32614
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 20-may-2024