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

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

Formato

application/pdf

Idioma

Inglés

Audiencia

Estudiantes

Investigadores

Repositorio Orígen

Repositorio Institucional de CIATEJ

Descargas

1482

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