Grupo UTN GISTAQ - Difusión Científica - Artículos de Revista

Permanent URI for this collectionhttp://48.217.138.120/handle/20.500.12272/3707

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    Cotton industry waste as adsorbent for methylene blue
    (2019-03-01) Tenev, María Daniela; Torre, Camila; Fontana, Gimena Lilián; Caracciolo, Néstor; Boeykens, Susana; Farías, Alejandro Rubén
    Removing dyes used in the textile industry from the water bodies is a relevant task because of the importance of their high toxicity. The cotton industry waste is a big problem in the final disposal. Waste cotton fibrils were studied as adsorbent material to treat the coloured effluents of the textile industry. Washing with boiling water was determined as the most efficient method for cleaning. The material was physical characterized. After that, methylene blue adsorption tests were carried out to review the dry removal process at different pH. The Langmuir isotherm and the pseudo-second kinetic order models best described this adsorption process. The results would indicate that the process involve a chemisorptions.
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    Furfural biodegradation in a moving bed biofilm reactor using native bacteria and agroforestry waste as supports
    (Multidisciplinary Digital Publishing Institute MDPI, 2025-04-27) Farías, Alejandro Rubén; Panigatti, Maria Cecilia; Vullo, Diana Lia
    Furfural is a relevant industrial product, but its presence in water and soil generates contamination and health risks. Moving bed biofilm reactors (MBBRs) are an increasingly used alternative to eliminate contaminants with the advantage of occupying small spaces, despite their high dependence on support and the microorganisms involved in the process. This work proposes furfural elimination through a laboratory-scale MBBR using Bacillus licheniformis GTQ1, Microbacterium sp. GISTAQ2, and Brevundimonas sp. GISTAQ1 isolated from an industrial effluent and agroforestry waste (rice husks, pine sawdust, and quebracho chips) as supports. The biofilm development was tested with both axenic and mixed cultures, confirming high coverage by Scanning Electron Microscope (SEM) images, especially in triple-mixed cultures. Biodegradation tests were carried out in the MBBR with 15 g rice husks or quebracho chips as supports and a 4000 mg L−1 initial furfural concentration for 72 h. The mixed culture achieved almost a 100% furfural removal in three days with a rate of 3.97% per hour with rice husks and 2.61% per hour with quebracho chips. This laboratory-scale MBBR development is a promising first step ready for a scale-up for its implementation in industries to significantly reduce the environmental impact of the discharge of this type of effluent.
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    Furfural biodegradation in consortium through bacillus licheniformis, microbacterium sp. and brevundimonas sp.
    (2022) Farías, Alejandro Rubén; Echeverría, Macarena Celeste; Utgés, Enid Marta; Fontana, Gimena Lilián; Cuadra, Pablo Nicolás
    Furfural (Furan-2-carbaldehyde) is a potentially toxic substance. Indigenous bacterial strains naturally adapted to that contaminant were previously isolated from the effluent of a tannin industry and identified as Microbacterium sp., Bacillus licheniformis and Brevundimonas sp. The aim of this work was to determine the maximum concentration of furfural that can be degraded by bacterial consortium metabolism. The colonies were activated in peptone solution and then in a mineral medium with glucose as co-substrate, adding the bacterial consortium and different concentrations of furfural. They were incubated in a shaker during 72 hours at 30 °C and 200 rpm. Bacterial growth was monitored by measuring absorbance at 610 nm. The concentration of furfural was analyzed by High Performance Liquid Chromatography. The consortium was able to grow in furfural concentration of up to 4516 mg L-1. Up to 2723 mg L-1 can be degraded in 24 hours. According to these results, a considerable furfural consumption increase is possible with a consortium.
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    Reactor de lecho fluidizado para tratar un efluente industrial con furfural
    (2017-11-03) Utgés, Enid Marta
    Se diseñó y construyó un Reactor Anaerobio de Lecho Fluidizado – RALF – a escala piloto, para tratar un efluente similar a las "aguas madres" – provenientes del procesamiento de aserrín de quebracho colorado detanizado – de una industria taninera. Las aguas madres poseen: acidez acentuada, elevada carga orgánica y compuestos orgánicos complejos; principalmente, ácido acético y furfural que la tornan un efluente recalcitrante. Actualmente, éste es tratado en la fábrica con un sistema de Pantanos Secos Artificiales – PSA – que utiliza fitoextracción para eliminar contaminantes. Para remover el furfural, se evaluó la aclimatación de un consorcio bacteriano autóctono – extraído de lodos de los sedimentadores del PSA – en un medio mineral M9 con distintas concentraciones de furfural. Se incubó el medio en condiciones de oxígeno reducido y en estufa a 37oC durante 7 días; se comprobó el crecimiento bacteriano visualmente. Se monitoreó el desempeño del RALF, operando con el consorcio aclimatado, analizando los porcentajes de remoción logrados. Los resultados demostraron que se pueden adaptar bacterias hasta 630 mg/L de furfural en aguas madres. La eficiencia de remoción de furfural, durante 20 h de funcionamiento del reactor, fue del 99%.