Optimization of Composting from the Solid Phase of Piggery

The aim of this work was to study the co-composting process of the solid phase of the digestate (PSD) obtained from the anaerobic digestion of pig slurry, with agricultural and agro-food wastes, such as wheat straw (WS), vine shoot pruning (VP), pepper plant pruning (PP) and exhausted grape marc (EGM), as well as the final added-value properties of the composts obtained. All the composting mixtures piles reached thermophilic conditions, except the pile elaborated with the solid phase of digestate and exhausted grape marc. In general, all the composts showed adequate suitable physical properties for their use as growing media and suppressive effect against the phytopathogen Fusarium oxysporum.