EFICIÊNCIA DA DIGESTÃO ANAERÓBIA DE BIODIGESTORES EM GRANJA DE SUÍNOS EM TERMINAÇÃO DE RIO VERDE – GOIÁS

Abstract

National swine farming has been undergoing profound technological changes in search of increased productivity, resulting in a large waste production with high pollution potential. Thus, the use of anaerobic reactors for swine manure (SM) treatment is presented as a solution capable of allowing the correct disposal of effluents and reducing the environmental pressure caused by such activity. The objective of this work was to study a system of biodigestors working in parallel, in order to provide the producer with a report of the anaerobic digestion conditions operated in the system, providing alternatives to improve the yield if necessary. The present study was carried out in a feedlot farm with approximately 4,200 pigs. SM weekly collections were performed in the digesters system for a period of 8 months, following two swine fattening cycles. Temperature, pH, Ammonia Nitrogen, BOD, COD and FOS / TAC analyzes were performed at the inlet and outlet of the digesters. By analyzing the results obtained, it is observed that the biodigesters operate in an optimal temperature range in warmer climatic periods and have statistically equal behavior regarding the removal of organic matter. No irregularities were observed in the analyzed parameters that would imply the interruption of anaerobic digestion, being confirmed by the drop in the FOS / TAC relationship between the system input and output. It is concluded that anaerobic digestion in the system is not impaired by any abnormality in any parameter analyzed, and no SM correction is necessary.