https://rd.uffs.edu.br/handle/prefix/1832 2025-12-02T15:37:21Z https://rd.uffs.edu.br/handle/prefix/1834 Title: Avaliação de desempenho de um biodigestor canadense modificado no tratamento de dejetos de suínos Author: Aires, Allan Wastowski; Silva, Fabiana Matze da; Castro, Verônica Mikilyta Urach de; Wenzel, Bruno München Abstract: This study aimed to evaluate the performance of the anaerobic digestion of pig slurry in a system of piglets production (UPL) and evaluate effluent quality for use as organic fertilizer. The work was performed in an UPL with 2544 animals that send their waste to a digester - modified Canadian model. Was estimated a residence time of 20.2 days. Several physical, chemical and biological parameters at the inlet and outlet of the reactor were evaluated. The results showed a high dilution of the waste compared with data reported in literature. High removal efficiencies of COD, total solids and volatile solids were observed - 72.8, 56.9 and 47.5%, respectively. From the application of the material conservation principle was estimated a production of cell biomass (sludge) of 0.709 g C/L of treated effluent. The specific biogas production was estimated as 0.338 Nm3 CH4/kg SV. The observation of the solids present in the input and output of the system allowed concluded that biogas is produced from the volatile solids and that, when in suspended form, they must dissolve in the liquid phase before conversion to biogas. The digester effluent showed about 1 wt% of nutrients whereas that in the sludge these values reach about 2wt%, making its application more favorable as agricultural fertilizer. Publisher: Universidade Federal Fluminense Type: Artigo de Periódico 2014-01-01T00:00:00Z