Anaerobic Digestion of Sugarcane Vinasse Through a Methanogenic UASB Reactor Followed by a Packed Bed Reactor |
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| Authors: | A Cabrera-Díaz I Pereda-Reyes D Oliva-Merencio R Lebrero M Zaiat |
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| Institution: | 1.Centro de Estudio de Ingeniería de Procesos (CIPRO), Facultad de Ingeniería Química,Universidad Tecnológica de La Habana José A. Echeverría (CUJAE),Marianao,Cuba;2.Centro de Estudio de Tecnologías Energéticas Renovables (CETER), Facultad de Ingeniería Mecánica,Universidad Tecnológica de La Habana José A. Echeverría (CUJAE),Marianao,Cuba;3.Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering,Universidad de Valladolid,Valladolid,Spain;4.Laboratório de Processos Biológicos (LPB), Centro de Pesquisa, Desenvolvimento e Inova??o em Engenharia Ambiental, Escola de Engenharia de S?o Carlos (EESC),Universidade de S?o Paulo (USP),S?o Carlos,Brazil |
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| Abstract: | The anaerobic treatment of raw vinasse in a combined system consisting in two methanogenic reactors, up-flow anaerobic sludge blanket (UASB) + anaerobic packed bed reactors (APBR), was evaluated. The organic loading rate (OLR) was varied, and the best condition for the combined system was 12.5 kg COD m?3day?1 with averages of 0.289 m3 CH4 kg COD r?1for the UASB reactor and 4.4 kg COD m?3day?1 with 0.207 m3 CH4 kg COD r?1 for APBR. The OLR played a major role in the emission of H2S conducting to relatively stable quality of biogas emitted from the APBR, with H2S concentrations <10 mg L?1. The importance of the sulphate to COD ratio was demonstrated as a result of the low biogas quality recorded at the lowest ratio. It was possible to develop a proper anaerobic digestion of raw vinasse through the combined system with COD removal efficiency of 86.7% and higher CH4 and a lower H2S content in biogas. |
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