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Accelerated formation of hydrogen-producing granules for the start-up of UASB reactors using vinasses

Hydrogen-producing granules formation was studied in a CSTR. The aim of this process is to later transfer the mixed liquor to a UASB reactor to reduce its start-up period. Vinasses from a national bioetha­nol-producing industry (from sugar cane) were used as substrate and their anaerobic fermentatio...

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Autores Principales: González-Ugalde, César, Durán-Herrera, Esteban
Formato: Artículo
Idioma: Español
Publicado: Editorial Tecnológica de Costa Rica 2014
Materias:
Hydrogen; anaerobic fermentation; hydrogen-producing granules; vinasses; UASB reactor
Hidrógeno; fermentación anaerobia; gránulos productores de hidrógeno; vinazas; reactor UASB
Acceso en línea: https://revistas.tec.ac.cr/index.php/tec_marcha/article/view/1694
https://hdl.handle.net/2238/4452
id RepoTEC4452
recordtype dspace
spelling RepoTEC44522018-09-13T16:45:04Z Accelerated formation of hydrogen-producing granules for the start-up of UASB reactors using vinasses Formación acelerada de gránulos productores de hidrógeno para el arranque de reactores UASB utilizando vinazas González-Ugalde, César Durán-Herrera, Esteban Hydrogen; anaerobic fermentation; hydrogen-producing granules; vinasses; UASB reactor Hidrógeno; fermentación anaerobia; gránulos productores de hidrógeno; vinazas; reactor UASB Hydrogen-producing granules formation was studied in a CSTR. The aim of this process is to later transfer the mixed liquor to a UASB reactor to reduce its start-up period. Vinasses from a national bioetha­nol-producing industry (from sugar cane) were used as substrate and their anaerobic fermentation was carried out under mesophilic conditions. The seed sludge was collected from an UASB reactor oper­ated in an industrial wastewater treatment plant and it was heat treated to inactivate methanogenic bacteria. Total viable and non-viable material growth curves were generated and it was determined that the exponential growth phase of the thermally pre­treated mixed culture was between 20 and 120 h. Finally, the anaerobic fermentation of the vinasses in batch mode for 70 hours, and then in continuous CSTR mode for 7 days, showed to be an effective method for accelerating the formation of hydrogen-producing granules. Using this method, granules with an average size of 1.24 mm were achieved. The good efficiency of the process is attributed to high mass transfer in the CSTR reactor. Se estudió la formación de gránulos productores de hidrógeno en un reactor CSTR, con el fin de transfe­rirlos luego un reactor UASB y así acortar el tiempo de arranque del mismo. El sustrato utilizado fueron vinazas provenientes de una agroindustria nacional productora de etanol a partir de melazas de caña de azúcar y su fermentación anaerobia se llevó a cabo bajo condiciones mesofílicas. Los lodos para realizar la inoculación del sistema se tomaron de un reactor UASB de una planta de tratamiento de agua industrial, a los cuales se les realizó un tratamiento térmico con el objetivo de inhibir el crecimiento de bacterias metanogénicas. Se generaron curvas de crecimiento de materia viable y no viable total, con las cuales se determinó que la fase de crecimiento exponencial de las bacterias en cultivo mixto pre­tratadas térmicamente se encontraba entre las 20 y las 120 h. Finalmente, la fermentación anaeróbica de las vinazas durante 70 horas en modo “batch” (por lotes) y posteriormente durante 7 días en modo continuo tipo CSTR demostró ser un pro­cedimiento efectivo para acelerar la formación de los gránulos productores de hidrógeno, lográndose obtener gránulos con un tamaño promedio de 1,24 mm. La alta eficiencia del proceso se le atribuye a la elevada transferencia de masa que se obtiene en el reactor CSTR. 2014-05-02 2015-03-23T21:04:07Z 2015-03-23T21:04:07Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares https://revistas.tec.ac.cr/index.php/tec_marcha/article/view/1694 https://hdl.handle.net/2238/4452 spa https://tecdigital.tec.ac.cr/servicios/ojs/index.php/tec_marcha/article/view/1694/1557 application/pdf Editorial Tecnológica de Costa Rica Tecnología en Marcha; Vol. 27, Núm. 1 (2014); pág. 38-47 2215-3241 0379-3982
institution Tecnológico de Costa Rica
collection Repositorio TEC
language Español
topic Hydrogen; anaerobic fermentation; hydrogen-producing granules; vinasses; UASB reactor
Hidrógeno; fermentación anaerobia; gránulos productores de hidrógeno; vinazas; reactor UASB
spellingShingle Hydrogen; anaerobic fermentation; hydrogen-producing granules; vinasses; UASB reactor
Hidrógeno; fermentación anaerobia; gránulos productores de hidrógeno; vinazas; reactor UASB
González-Ugalde, César
Durán-Herrera, Esteban
Accelerated formation of hydrogen-producing granules for the start-up of UASB reactors using vinasses
description Hydrogen-producing granules formation was studied in a CSTR. The aim of this process is to later transfer the mixed liquor to a UASB reactor to reduce its start-up period. Vinasses from a national bioetha­nol-producing industry (from sugar cane) were used as substrate and their anaerobic fermentation was carried out under mesophilic conditions. The seed sludge was collected from an UASB reactor oper­ated in an industrial wastewater treatment plant and it was heat treated to inactivate methanogenic bacteria. Total viable and non-viable material growth curves were generated and it was determined that the exponential growth phase of the thermally pre­treated mixed culture was between 20 and 120 h. Finally, the anaerobic fermentation of the vinasses in batch mode for 70 hours, and then in continuous CSTR mode for 7 days, showed to be an effective method for accelerating the formation of hydrogen-producing granules. Using this method, granules with an average size of 1.24 mm were achieved. The good efficiency of the process is attributed to high mass transfer in the CSTR reactor.
format Artículo
author González-Ugalde, César
Durán-Herrera, Esteban
author_sort González-Ugalde, César
title Accelerated formation of hydrogen-producing granules for the start-up of UASB reactors using vinasses
title_short Accelerated formation of hydrogen-producing granules for the start-up of UASB reactors using vinasses
title_full Accelerated formation of hydrogen-producing granules for the start-up of UASB reactors using vinasses
title_fullStr Accelerated formation of hydrogen-producing granules for the start-up of UASB reactors using vinasses
title_full_unstemmed Accelerated formation of hydrogen-producing granules for the start-up of UASB reactors using vinasses
title_sort accelerated formation of hydrogen-producing granules for the start-up of uasb reactors using vinasses
publisher Editorial Tecnológica de Costa Rica
publishDate 2014
url https://revistas.tec.ac.cr/index.php/tec_marcha/article/view/1694
https://hdl.handle.net/2238/4452
_version_ 1796144171308810240
score 12.239212

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