Producción de metano a partir de biomasa residual pecuaria enriquecida con desecho de cultivo de fresa (Fragaria ananassa) en la Universidad Técnica de Ambato, Facultad de Ciencias Agropecuarias

Abstract

The objective of the research is to determine the production in vitro of biogas, methane and AGVs by adding strawberry residues in pig and sheep manure at different concentrations, the experiment was carried out in the Ruminology laboratories of the Faculty of Agricultural Sciences of the Technical University of Ambato, a completely randomized block design was applied, and the Tukey comparison test at 5% through the statistical system Infostat version 2019; the studied treatments were made with a standard raw material of pig herd manure , in combination with different proportions of fresh macerated strawberry and sheep flock manure as follows: T1 60% + 40% strawberry macerated; T2 Cerdaza 60% + 30% macerated strawberry + 10% sheep flock manure; T3 Cerdaza 60% + 20% macerated strawberry + 20% sheep flock manure; T4 Cerdaza 60% + 10% macerated strawberry + 30% sheep flock manure and T5 Cerdaza 60% + 40% sheep flock manure . The results observed in relation to the biogas production was higher (P = 0.0001) in the treatment T4 (201.2 mL / kg) and T5 (193.56 mL / kg), as well as the methane production was higher (P = 0.0001) in T4 (6.8 mL / kg) and T5 (7.0 mL / kg), referring about volatile fatty acids, a higher (P = 0.0001) production of acetic acid was observed in treatment T1 in relation to the other treatments. While for propionic acid the highest (P = 0.0001) production was observed in T3 and in butyric acid there weren't observed differences (P = 0.9807) between the evaluated treatments. Concluding that the strawberries was not decisive to increase the formation of biogas such as methane, however it was at the time of the formation of volatile fatty acids, which is verified as the best treatment T1 with the highest percentage of strawberry added to pig manure.