Diseño de un biodigestor de domo flotante para la obtención de biogás a partir de estiércol de ganado vacuno en la parroquia Cubijies

Abstract

The objective of this study was to design a floating dome biodigester to obtain biogas using cattle manure from the “El Rosal” farm, located in Cubijies, Canton Riobamba, in the province of Chimborazo. A manure sampling of four cows was carried out for seven days whose average daily production was 7.5 Kg for each one. considering that the farm has 15 heads of cattle, it has a load of 112.5 kg per day. To learn about biogas production, a prototype was built at the laboratory level with a substrate load of 12 kg of manure and 12 kg of water (1: 1 ratio), this allowed to establish variables and parameters, being the retention time of 30 days, the average temperature of the biodigester of 28 ° C, average ambient temperature 26 ° C, pH 6.97, a biogas production of 0.620 m3. Also, the presence of CH4 was evidenced by the flame test, denoting that after 20 days the flame is blue. The physical-chemical and microbiological characterization of the raw digested manure and biol was important to know the quality of organic material used for this study. Once the experimental data were obtained, the engineering calculations for the design were carried out, where the height is 2.7 m, the diameter of 2 m and its volume is 8.44 m3, the height of the hood is 2, 28 m, the diameter of 1.9 m and a volume of 5.86 m. It is concluded that the biogas that will be produced per month supplies the farm in addition to providing benefits such as the generation of biofertilizers (biol and biosol) that will be used for better crop development.