RT info:eu-repo/semantics/article
T1 Simultaneous production of biogas and volatile fatty acids through anaerobic digestion using cereal straw as substrate
A1 García Álvaro, Alfonso
A1 Ruiz Palomar, César
A1 Hermosilla Redondo, María Daphne
A1 Muñoz Torre, Raúl
A1 Godos Crespo, Ignacio de
K1 Reciclaje (Residuos, etc.)
K1 Biomasa
K1 Renewable and Green Energy
K1 Biogas
K1 Volatile fatty acids
K1 Lignocellulosic substrate
K1 Biogás
K1 Ácidos grasos volátiles
K1 Sustrato lignocelulósico
K1 31 Ciencias Agrarias
K1 3106 Ciencia Forestal
AB Cereal straw is one of the most abundant wastes worldwide, with 30.000 million tons produced per year. Bioconversion of this residual material into carboxylates by anaerobic digestion could potentially replace conventional production based on fossil feedstocks (oil). In this work, fundamental issues of this bioconversion have been explored, including: different kinds of straw (wheat, barley and rye), biomass size reduction, mass balances and modelling of the different steps of the digestion. Under optimum conditions, 44% of the raw material was effectively converted into VFAs (mainly acetate) when barley was used as substrate. Wheat and rye straw presented lower conversion rates due to the higher lignin content compared to barley straw. According to the modelling proposed, methanogenesis and hydrolysis presented very similar reaction rates, which resulted in a simultaneous production of VFAs and biogas. In view of these results, a process integration is proposed where biogas covers the thermal needs of the biotransformation of barley biomass into VFAs.
PB Elsevier
SN 2352-1864
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/59713
UL https://uvadoc.uva.es/handle/10324/59713
LA eng
NO Environmental Technology & Innovation, 2023, vol. 31, 103215
NO Producción Científica
DS UVaDOC
RD 08-ago-2024