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dc.contributor.author
Barrera, Soledad
dc.contributor.author
Baigori, Mario Domingo
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dc.contributor.author
Pera, Licia Maria
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dc.date.available
2023-04-10T15:44:56Z
dc.date.issued
2011
dc.identifier.citation
Biosorption of molasses dyes by viable and non-viable microbial biomass; VII Congreso Argentino de Microbiología General; San Miguel de Tucumán; Argentina; 2011; 1-3
dc.identifier.uri
http://hdl.handle.net/11336/193063
dc.description.abstract
Molasses, a by-product of sugar extraction process, is a common raw material used in several industrial fermentations. However, molasses contains colored substances, some of them with inhibitory activities. Thus, innovative technologies, such as biosorption, are needed as alternatives to conventional methods to find inexpensive ways of removing dyes. With respect to dye biosorption, microbial biomass (bacteria, fungi, microalgae, etc.) outperformed macroscopic materials (sea-weeds, crab shell, etc.). The reason for this discrepancy is due to the nature of the cell wall constituents and functional groups involved in dye binding. In this connection, the major objective of this study was to investigate the potential of viable and non-viable microbial biomasses as biosorbent for the removal of dyes from sugar cane molasses. Materials and methods: Both viable and inactivated by autoclaving biomasses of Aspergillus niger ATCC MYA 135, Saccharomyces cerevisiae and Brevibacillus agri MIR E12 were used. Microorganisms were grown on agarized medium as well as in liquid medium. Potato glucose, LB and YEPD were used for the cultivation of A. niger, B. agri and S. cerevisiae, respectively. Decolorization experiments were conducted at 30 °C by shaking molasses solution at 300 rpm during 20 min in the presence of 1.5 or 3.0 % of microbial biomass (wet weight/v). The molasses pH was adjusted at 3, 7 or 9 being its initial reducing sugar concentration 10 g/l. Decolorization capacity was determined by monitoring the absorbance at 475 nm. Results and conclusions: The initial molasses pH value was an important factor for the biosorption process. In the primary screening step, the inactivated biomass of B. agri grown in liquid medium showed the highest decolorization capacity (47 %) when a molasses at pH 3 was used. Interestingly, the total amount of reducing sugar did not significantly change. In addition, the production of an extracellular lipase from B. agri was significantly increased when this treated molasses was used as carbon source. On the other hand, the best decolorization capacity obtained with either A. niger or S. cerevisiae was detected with viable biomass growing on agarized medium and using molasses at initial pH 9. These results show the ability of microbial biomass to remove colored substances from sugar cane molasses.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Sociedad Argentina de Microbiología General
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
DECOLORATION
dc.subject
MOLASSES
dc.subject
BIOSRPTION
dc.subject
LIPASES
dc.subject.classification
Bioproductos, Biomateriales, Bioplásticos, Biocombustibles, Bioderivados, etc.
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dc.subject.classification
Biotecnología Industrial
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Biosorption of molasses dyes by viable and non-viable microbial biomass
dc.type
info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/conferenceObject
dc.type
info:ar-repo/semantics/documento de conferencia
dc.date.updated
2023-03-31T15:05:10Z
dc.journal.pagination
1-3
dc.journal.pais
Argentina
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dc.journal.ciudad
San Miguel de Tucumán
dc.description.fil
Fil: Barrera, Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentina
dc.description.fil
Fil: Baigori, Mario Domingo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentina
dc.description.fil
Fil: Pera, Licia Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentina
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://samige.org.ar/wp-content/uploads/2022/10/Libro-SAMIGE-2011.pdf
dc.conicet.rol
Autor
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dc.conicet.rol
Autor
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dc.conicet.rol
Autor
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dc.coverage
Internacional
dc.type.subtype
Congreso
dc.description.nombreEvento
VII Congreso Argentino de Microbiología General
dc.date.evento
2011-05
dc.description.ciudadEvento
San Miguel de Tucumán
dc.description.paisEvento
Argentina
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dc.type.publicacion
Book
dc.description.institucionOrganizadora
Sociedad Argentina de Microbiología General
dc.source.libro
VII Congreso Argentino de Microbiología General
dc.type
Congreso
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