Biodigestão anaeróbia da fração líquida da cama de frango triturada e peneirada: efeito da diluição e do uso de reciclo
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Data
2017-05-25
Autores
Sagula, Alex Luiz [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Objetivou-se avaliar a produção de biogás no processo anaeróbio da cama de frango, submetido ao processo de peneiramento e trituração, em função da diluição e reciclo, em sistema de abastecimento batelada e semi-contínuo. Para o processo de peneiramento utilizou-se uma peneira vibratória com malha de um mm e para trituração da cama de frango foi utilizado uma bomba trituradora. As diluições da cama de frango foram feitas de duas formas: cama de frango + água e cama de frango + reciclo. No sistema de abastecimento batelada, foram estudas as diluições nas seguintes proporções 1:8, 1:10 e 1:12 e a utilização de 20% de reciclo em substituição a água de diluição, avaliando-se as reduções de sólidos voláteis, produção de biogás e potenciais de produção de biogás. Para reduções de sólidos voláteis obtiveram-se bons resultados para as diluições 1:8 e 1:10, e para produção de biogás a diluição 1:8 com reciclo foi a que apresentou melhor resultado, bem como para os potenciais de produção de biogás. No sistema de abastecimento semicontínuo, foi estudada a diluição 1:10 com 40% de reciclo. O tratamento que continha só reciclo foi o que proporcionou melhor redução de sólidos voláteis, não apresentando diferenças para a produção de biogás. Os melhores potenciais de produção de biogás foram obtidos com o tratamento que continha água. Concluiu-se que para o sistema batelada as diluições e o reciclo apresentaram bons resultados para redução de sólidos voláteis e produção de biogás e para sistema semi-continuo o reciclo demostrou ser eficiente na redução de sólidos voláteis e não interferindo na produção de biogás.
The objective of this study was to evaluate the biogas production in the anaerobic process of the chicken litter, submitted to the screening and grinding process, as a function of dilution and recycle, in a batch and semi-continuous supply system. For the screen process used a vibrating screen with a mesh mm and grinding poultry litter was used a shredder pump. Dilutions of poultry litter were done in two ways: poultry litter + water and poultry litter + recycle. In the batching system, the dilutions were studied in the following ratios 1: 8, 1:10 and 1:12 and the use of 20% recycle to replace the dilution water. Evaluating the volatile solids reductions, biogas production and biogas production potentials. For volatile solids reductions, good results were obtained for the 1: 8 and 1:10 dilutions, and for biogas production at 1: 8 dilution with recycle it was the one that presented the best result and the biogas production potential obtained satisfactory results. In the semi-continuous supply system, the 1:10 dilution with 40% recycle was studied. The treatment that contained only recycle was the one that provided better reduction of volatile solids, the biogas production did not have difference between the treatments and for the potential of biogas production treatment that contained water was that presented better result. It is concluded that for the batch system dilutions and recycle presented good results for reduction of volatile solids and biogas production and for semi-continuous system the recycle proved to be efficient in the reduction of volatile solids and not interfering in the production of biogas.
The objective of this study was to evaluate the biogas production in the anaerobic process of the chicken litter, submitted to the screening and grinding process, as a function of dilution and recycle, in a batch and semi-continuous supply system. For the screen process used a vibrating screen with a mesh mm and grinding poultry litter was used a shredder pump. Dilutions of poultry litter were done in two ways: poultry litter + water and poultry litter + recycle. In the batching system, the dilutions were studied in the following ratios 1: 8, 1:10 and 1:12 and the use of 20% recycle to replace the dilution water. Evaluating the volatile solids reductions, biogas production and biogas production potentials. For volatile solids reductions, good results were obtained for the 1: 8 and 1:10 dilutions, and for biogas production at 1: 8 dilution with recycle it was the one that presented the best result and the biogas production potential obtained satisfactory results. In the semi-continuous supply system, the 1:10 dilution with 40% recycle was studied. The treatment that contained only recycle was the one that provided better reduction of volatile solids, the biogas production did not have difference between the treatments and for the potential of biogas production treatment that contained water was that presented better result. It is concluded that for the batch system dilutions and recycle presented good results for reduction of volatile solids and biogas production and for semi-continuous system the recycle proved to be efficient in the reduction of volatile solids and not interfering in the production of biogas.
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Palavras-chave
Avicultura, Biodigestor, Biogás, Poultry, Biodigester, Biogas