Título
Tequila vinasses acidogenesis in a UASB reactor with Clostridium predominance
Autor
GUSTAVO DAVILA VAZQUEZ
ERIKA NAHOMY MARINO MARMOLEJO
ROBERTO EMMANUEL BOLAÑOS ROSALES
SILVIA MARIBEL CONTRERAS RAMOS
Nivel de Acceso
Acceso Abierto
Referencia de datos
doi: DOI 10.1186/s40064-015-1193-2
Materias
Resumen o descripción
Tequila vinasses represent an acidic, highly concentrated pollutant effluent generated during the distillation step of
Tequila production. Although acidogenesis of Tequila vinasses has been reported for some reactor configurations,
a characterization of the bacteria present during this metabolic process is lacking in the literature. Hydraulic retention
times (HRT) between 36 and 6 h and organic loading rates (OLR) from 5 to 30 g COD L−1 d−1 were assessed in
a UASB reactor fed with Tequila vinasses. Results showed that OLR excerted a stronger effect (p ≤ 0.0001) on parameters
such as gas production rate, pH, and acidity than HRT. While it was clear that shorter HRT were related to higher
volatile fatty acid production levels. Figures above 2 Lgas L−1
reactor d−1 (where “gas” could be a mixture of methane and
hydrogen) were attained only with an OLR as high as 30 g COD L−1 d−1. Bacterial identification of a sludge sample at
the end of the experiment revealed that acid-tolerant microorganisms that remained in the reactor were exclusively
affiliated to the Clostridium genera, being the first report of organisms identification for Tequila vinasses acidogenesis.
These findings are relevant to the field of biotechnology since acidogenesis of Tequila vinasses using identified and
studied microorganism abilities (i.e. Clostridium strains) presents the opportunity of optimizing processes intended for
different metabolites production (butanol, volatile fatty acids, hydrogen, solvents).
Editor
Springer Plus
Fecha de publicación
2015
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Idioma
Inglés
Audiencia
Estudiantes
Investigadores
Repositorio Orígen
Repositorio Institucional de CIATEJ
Descargas
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