Biodigestão anaeróbia dos dejetos de cabritos Saanen alimentados com dietas com diferentes proporções volumoso e concentrado
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Data
2011-02-01
Autores
Orrico, Ana Carolina Amorim
Orrico Junior, Marco Antonio Previdelli [UNESP]
Lucas Junior, Jorge de [UNESP]
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ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zootecnia
Resumo
Avaliaram-se os efeitos da idade do animal e da proporção de volumoso nas dietas sobre a biodigestão anaeróbia dos dejetos de cabritos Saanen. Foram utilizadas as fezes produzidas por cabritos Saanen aos 90, 120 e 150 dias de idade e alimentados com dietas de três relações volumoso:concentrado (80:20, 60:40 e 40:60), representando as dietas 1, 2 e 3, respectivamente. Utilizaram-se biodigestores tipo batelada de bancada com capacidade para 12 litros de substrato em fermentação e 8% de sólidos totais iniciais para determinação das produções e dos potenciais de produção de biogás e metano, da redução de sólidos voláteis e quantificação dos teores de minerais no afluente e efluente. As maiores reduções de sólidos voláteis foram observadas nos substratos preparados com as fezes de cabritos aos 150 dias alimentados com a dieta com relação volumoso:concentrado de 40:60. Os melhores rendimentos de substrato ou fezes foram obtidos com os dejetos dos cabritos de 120 e 150 dias de idade alimentados com a dieta com relação volumoso:concentrado 40:60. As maiores concentrações de minerais nos biodigestores foram observadas para as fezes de cabritos de 150 dias de idade alimentados com a dieta com relação volumoso:concentrado 40:60. A biodigestão anaeróbia é eficiente na remoção de coliformes nos dejetos de caprinos, proporcionando efluentes com no máximo 4,3 × 10² coliformes totais termotolerantes por grama de material.
It was evaluated the effects of age of the animal and of the proportion of dietary roughag on anaerobic biodigestion of the manure of Saanen kids. It was used the feces produced by Saanen kids at 90, 120 and 150 days of age and fed diets with three roughage:concentrate ratios (80:20, 60:40 and 40:60), representing diets 1, 2 and 3, respectively. It was used batch digesters of bench with capacity for 12 liters of substratum in fermentation process and 8% of initial total solids for determination of biogas and methane productions and production potentials, and reduction of volatile solids and quantification of mineral contents in affluent and effluent. The greatest volatile solid reductions were observed in substrata prepared with feces of goats at 150 days of age fed diets with roughage:concentrate ratio of 40:60. The best results of substratum or feces were obtained with manure of goats at 120 and 150 days of age fed diet with 40:60 roughage:concentrate ratio. The greatest concentrations of minerals in the biodigesters were observed for feces of goats at 150 days of age fed the diet 40:60 roughage:concentrate ratio. Anaerobic biodigestion is efficient in removing coliforms from goat manure, providing effluents with maximum of 4.3 × 10² of total and thermotolerant coliforms per gram of material.
It was evaluated the effects of age of the animal and of the proportion of dietary roughag on anaerobic biodigestion of the manure of Saanen kids. It was used the feces produced by Saanen kids at 90, 120 and 150 days of age and fed diets with three roughage:concentrate ratios (80:20, 60:40 and 40:60), representing diets 1, 2 and 3, respectively. It was used batch digesters of bench with capacity for 12 liters of substratum in fermentation process and 8% of initial total solids for determination of biogas and methane productions and production potentials, and reduction of volatile solids and quantification of mineral contents in affluent and effluent. The greatest volatile solid reductions were observed in substrata prepared with feces of goats at 150 days of age fed diets with roughage:concentrate ratio of 40:60. The best results of substratum or feces were obtained with manure of goats at 120 and 150 days of age fed diet with 40:60 roughage:concentrate ratio. The greatest concentrations of minerals in the biodigesters were observed for feces of goats at 150 days of age fed the diet 40:60 roughage:concentrate ratio. Anaerobic biodigestion is efficient in removing coliforms from goat manure, providing effluents with maximum of 4.3 × 10² of total and thermotolerant coliforms per gram of material.
Descrição
Palavras-chave
Biogas, Goat, Methane, recycling, Biogas, Caprino, Metano, reciclagem
Como citar
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 40, n. 2, p. 448-453, 2011.