RT info:eu-repo/semantics/article
T1 Energy integration of thermal pretreatment in anaerobic digestion of wheat straw
A1 García Álvaro, Alfonso
A1 Ruiz Palomar, César
A1 Díaz Villalobos, Israel
A1 Hermosilla Redondo, María Daphne
A1 Muñoz Torre, Raúl
A1 Godos Crespo, Ignacio de
K1 Anaerobic digestion
K1 Cereal straw
K1 Biogas
K1 Energy integration
K1 Thermal pretreatment
K1 Steam explosion
K1 Waste to energy
K1 3303 Ingeniería y Tecnología Químicas
K1 3308 Ingeniería y Tecnología del Medio Ambiente
K1 33 Ciencias Tecnológicas
K1 3322.02 Generación de Energía
AB Cereal straw stands out as one of the most abundant and globally distributed agricultural residues. Traditional applications cope with a limited amount of production, leaving the remainder in the field for natural decomposition. Managing cereal straw through controlled biological transformation under anaerobic conditions holds the potential to generate added value in the form of bioenergy. However, the lignocellulosic composition of these substrates poses challenges for organic degradation, often requiring energy-intensive pretreatments. A detailed study with a comprehensive calculation of the overall energy balance of the integrated process is proposed, aiming to provide real added value and replicability. Three scenarios for wheat straw transformation were investigated, incorporating two preliminary pre-treatment stages—mechanical milling and physicochemical steam explosion. Three conditions of pretreatment were essayed, varying the time exposure of the steam explosion. The subsequent energy integration analysis revealed that the process was optimized by up to 15% in the final energy balance when the steam explosion was set to 10 min. The macromolecular composition determination revealed that the thermal pretreatment reduced the lag phase of the hydrolysis step through hemicellulose breakdown.
PB MDPI
SN 1996-1073
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/67468
UL https://uvadoc.uva.es/handle/10324/67468
LA eng
NO Energies, 2024, Vol. 17, Nº. 9, 2030
NO Producción Científica
DS UVaDOC
RD 24-dic-2024