Repositorio UFRO · Omeka S

On-Line Control of Feast/Famine Cycles to Improve PHB Accumulation during Cultivation of Mixed Microbial Cultures in Sequential Batch Reactors

Primer Autor	Jeison, David
Co-autores	Cabrera, Francisco Torres-Aravena, Alvaro Pinto-Ibieta, Fernanda Campos, Jose Luis,
Título	On-Line Control of Feast/Famine Cycles to Improve PHB Accumulation during Cultivation of Mixed Microbial Cultures in Sequential Batch Reactors
Editorial	MDPI
Revista	INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
Lenguaje	en
Resumen	Production of polyhydroxyalkanoates (PHA) has generated great interest as building blocks for bioplastic production. Their production using mixed microbial cultures represents an interesting alternative, since it enables the use of organic wastes as a carbon source. Feast/famine strategy is a common way to promote selection of microorganisms with PHA accumulation capacity. However, when using waste sources, changes in substrate concentration are expected, that may affect performance and efficiency of the process. This study showed how the dissolved oxygen level can be used for online control of the cycle time, ensuring that the desired feast/famine ratio is effectively applied. An operation strategy is presented and validated, using sequential batch reactors fed with acetate as the carbon source. Production of polyhydroxybutyrate (PHB) was studied, which is the expected type of PHA to be synthetized when using acetate as substrate. Two reactors were operated by applying the proposed control strategy, to provide F/F ratios of 0.2 and 0.6, respectively. A third reactor was operated with a fixed cycle time, for comparison purposes. Results showed that the reactor that operated at an F/F ratio of 0.6 promoted higher biomass productivity and PHB content, as a result of a better use of available time, preventing unnecessary long famine times. The application of the tested strategy is a simple a reliable way to promote a better performance of feast/famine-based bioreactors involving mixed microbial cultures for PHB production.
Tipo de Recurso	artículo original
Description	This research was funded by CRHIAM Centre, grant number ANID/FONDAP/15130015. The APC was funded by Pontificia Universidad Catolica de Valparaiso. Esta investigación fue financiada por el Centro CRHIAM, subvención número ANID/FONDAP/15130015. La APC fue financiada por la Pontificia Universidad Católica de Valparaíso.
doi	10.3390/ijerph182312611
Formato Recurso	PDF
Palabras Claves	PHB bioplastics SBR dissolved oxygen feast famine POLYHYDROXYALKANOATES PHAS PRODUCTION RALSTONIA-EUTROPHA ACTIVATED-SLUDGE STRATEGIES ENRICHMENT SUBSTRATE
Ubicación del archivo	http://dx.doi.org/10.3390/ijerph182312611
Categoría OCDE	Ciencias Ambientales Salud pública ambiental y ocupacional
Materias	PHB bioplásticos SBR oxígeno disuelto fiesta hambruna PRODUCCIÓN DE POLIHIDROXIALCANANOATOS PHAS RALSTONIA-EUTROPHA LODOS-ACTIVADOS ESTRATEGIAS ENRIQUECIMIENTO SUSTRATO
Disciplinas de la OCDE	Biotecnología Ambiental Bioproductos (Productos que se manufacturan usando biotecnología como materia prima), Biomateriales, Bioplásticos, Biocombustibles, Químicos Brutos y Finos, Bioderivados, Materiales nuevos Bioderivados Microbiología
Título de la cita (Recomendado-único)	On-Line Control of Feast/Famine Cycles to Improve PHB Accumulation during Cultivation of Mixed Microbial Cultures in Sequential Batch Reactors
Identificador del recurso (Mandatado-único)	artículo original
Versión del recurso (Recomendado-único)	version publicada
License	CC BY 4.0
Condición de la licencia (Recomendado-repetible)	CC BY 4.0
Derechos de acceso	acceso abierto
Access Rights	acceso abierto
Referencia del Financiador (Mandatado si es aplicable-repetible)	ANID-FONDAP 15130015 ANID FONDAP 15130015
Id de Web of Science	WOS:000734924900001