Anaerobic Digestion of Sugarcane Vinasse Through a Methanogenic UASB Reactor Followed by a Packed Bed Reactor.

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.

DOI: 10.1007/s12010-017-2488-2

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Cite this paper

@article{CabreraDaz2017AnaerobicDO, title={Anaerobic Digestion of Sugarcane Vinasse Through a Methanogenic UASB Reactor Followed by a Packed Bed Reactor.}, author={A Cabrera-D{\'i}az and Ileana Pereda-Reyes and Deny Oliva-Merencio and Raquel Lebrero and Marcelo Zaiat}, journal={Applied biochemistry and biotechnology}, year={2017} }