Browsing by Author "Di Gregorio, Vanina"

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    Caracterización de residuos agroindustriales con potencial aplicación en procesos biotecnológicos
    (2023-09) Conde Molina, Debora; Di Gregorio, Vanina
    El desarrollo de bioprocesos que utilizan residuos agroindustriales constituye uno de los retos más interesantes de la biotecnología actual, ya que conlleva a la reutilización de residuos de una manera ambientalmente responsable y al desarrollo de productos de alto valor agregado. En este trabajo se caracterizaron residuos agroindustriales de la región noroeste de la provincia de Buenos Aires, con el fin de analizar sus posibles aplicaciones en el desarrollo de bioprocesos locales. Los residuos analizados fueron: compost agotado de hongos, residuo de texturizado de soja, residuo de raíz de batata, residuo de cama de pollo y rastrojo de trigo. A los mismos se les determinó humedad, pH, carbono orgánico, nitrógeno total, fósforo total, potasio, calcio. Los resultados mostraron que todos los residuos contribuyen a cubrir parte de los requerimientos nutricionales de los microorganismos, aportando principalmente fuentes de carbono y nitrógeno.
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    Enhancing biodegradation of vegetable oil-contaminated soil with soybean texturized waste, spent mushroom substrate, and stabilized poultry litter in microcosm systems.
    (2024-06) Conde Molina, Debora; Di Gregorio, Vanina
    Industrial activities contribute to environmental pollution, particularly through unregulated effluent discharges, causing adverse effects on ecosystems. Vegetable oils, as insoluble substances, exacerbate this pollution, forming impermeable films and affecting the oxygen transfer, leading to serious habitat disruption. Organic wastes, such as soybean texturized waste, spent mushroom substrate, and stabilized poultry litter, were assessed for their efficacy in enhancing the degradation of vegetable oil in contaminated soil. For this purpose, contaminated soil was amended with each of the wastes (10% w/w) using microcosm systems, which were monitored physico-chemically, microbiologically and toxicologically. Results indicate that the wastes promoted significant oil degradation, achieving 83.1, 90.7, and 86.2% removal for soybean texturized waste, spent mushroom substrate, and stabilized poultry litter, respectively, within a 90-day period. Additionally, they positively influenced soil microbial activity, as evidenced by increased levels of culturable microorganisms and hydrolytic microbial activity. While bioassays indicated no phytotoxicity in most cases, soybean texturized waste exhibited inhibitory effects on seed germination and root elongation of Lactuca sativa. This study significantly enhances our comprehension of remediation techniques for sites tainted with vegetable oils, highlighting the critical role of organic waste as eco-friendly agents in soil restoration. Emphasizing the practical implications of these findings is imperative to underscore the relevance and urgency of addressing vegetable oil contamination in soil. Moving forward, tailored strategies considering both contaminant characteristics and soil ecosystem traits are vital for ensuring effective and sustainable soil remediation.