Produções de biogás e metano a partir da biodigestão anaeróbia das fezes de cabritos alimentados com três dietas e em diferentes idades.

Abstract

- The expansion of the Brazilian caprinoculture and the characteristics of the wastes generated with the breeding of the animals justify the adoption of the anaerobic digestion for treatment and recycle of the wastes. For the execution of experiment were used the feces produced by kid goats Saanen to the 90, 120 and 150 days of age and fed with three diets (d1, d2 and d3 = diets 1 (80% forage (F) and 20% concentrated (C)), 2 (60% F and 40% C) and 3 (40% F and 60% C), respectively). 12 liters batch digesters, initial concentration total solids (TS) of 8% and quantified the total productions and potentials production of biogas and methane was adopted. The largest biogas productions and methane happened in substrate prepared with the kid goats feces of 150 days of age and fed with the diet 3. The best efficiency, expressed by potentials production of biogas and methane by kg of TS or volatile solids (VS) added, of substrate or feces were observed in the prepared substrate with the kid goats feces of fed with the diet 3, to the 120 and 150 days of age.