0903/2012. Artículo de CEBAS-CSIC y UPV-RESIAGRI en la revista Biomass and Bioenergy.
Descripción del documento:
José Antonio Alburquerque, Carlos de la Fuente, Alicia Ferrer-Costa, Lucía Carrasco,
Juan Cegarra, Manuel Abad, María Pilar Bernal. Assessment of the fertiliser potential of digestates from farm and agroindustrial residues, Biomass and Bioenergy (2012), doi:10.1016/j.biombioe.2012.02.018
The sustainability of biogas production systems depends greatly on the appropriate
disposal of the digestates produced. The main agrochemical characteristics of 12 digestates
from the anaerobic co-digestion of farm and agroindustrial residues were determined and
compared with quality standards to assess their potential use as fertilisers. The digestates
have a high fertilising potential, associated mainly with their contents of NH4-N; however,
their recycling in agriculture might be restricted by their Cu and Zn contents, salinity,
biodegradability, phytotoxicity and hygiene characteristics, which must be addressed to
obtain the maximum benefits. Such characteristics determine the need for applying pre- or
post-treatments to increase digestate quality until acceptable levels. Therefore, digestate
quality must be taken into account when managing the co-digestion process, including
substrate selection, in order to use digestates as fertilisers without the additional cost of
post-digestion conditioning treatments.