ISSN: 1659-2751

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Evaluation of Vinasse and its Effect on the Production and Quality of Biogas and Effluents using Different Concentrations

Abstract

This study evaluated the production and quality of biogas (CH4, H2S) and the quality of the effluents (DQO, DBO), using cattle manure dissolved in water and vinasse as a supplement in biodigesters. The study was conducted with four different treatments (0 %, 30 %, 40 % and 50 % vinasse replacing the water) and three repetitions for each treatment, for a total of 12 scale model biodigesters. The control sample (0 % vinasse) produced the highest amount of biogas. The highest concentration of CH4 in the biogas was generated with 40 % and 50 % vinasse treatments. The control sample was the only one generated H2S in the biogas. For all treatments there was a reduction in the concentrations of COD, BOD and total solids in the effluents. However, these reductions were not sufficient for the effluents to be discharged into natural waterways.

Key words: biogas, biodigesters, COD, BOD, H2S, CH4, vinasse.

Artículo en español (pdf) (865)