Entomoremediación: Influencia de una Dieta Plástica en el Desarrollo de Tenebrio Molitor para Generar Biofertilizante

• Bastidas Proaño, Daniela ^[1]
  1. [1] Universidad Central del Ecuador

     Universidad Central del Ecuador

     Quito, Ecuador

     
• Localización: Revista Politécnica, ISSN-e 2477-8990, Vol. 53, Nº. 2, 2024 (Ejemplar dedicado a: Revista Politecnica), págs. 7-16
• Idioma: español
• DOI: 10.33333/rp.vol53n2.01
• Títulos paralelos:
  • Entomoremediation: Influence of a Plastic Diet on the Development of Tenebrio Molitor to Generate Biofertilizer
• Enlaces
  • Texto completo
• Resumen
  • español

    El plástico es ampliamente utilizado y responsable de impactos ambientales negativos. Tal es el caso del poliestireno expandido (EPS), que presenta desafíos de revalorización por su baja densidad. Aunque ciertas larvas de insecto, como tenebrio molitor, han demostrado la capacidad de mineralizar plásticos, la insecticultura de estos aún se enfoca en obtener proteína sostenible y biofertilizante. En este estudio, se investiga la influencia de una dieta de EPS en el desarrollo larval de T. molitor durante 6 meses, y se examina cómo la dieta afecta el volumen de biofertilizante recolectado en este lapso. Se desarrollaron ensayos con tres dietas, realizando mediciones y recolección de material de manera periódica. Los resultados indican que las larvas alimentadas con un sustrato combinado, así como aquellas con una dieta orgánica, demuestran tasas de supervivencia de hasta 66%. La longitud final es inferior en la dieta inorgánica (112mm), y en las otras dietas superan los 162 mm. Las larvas de una dieta inorgánica no progresaron a pupa, demostraron un Factor de Conversión de Alimento desalentador (3,87) y produjeron menor cantidad de frass/biofertilizante (1,28g), en comparación con la dieta combinada que registró 5,11g. Los datos sugieren que la entomoremediación plástica funciona óptimamente si se cría larvas en un sustrato combinado de EPS y elementos orgánicos. Dicha condición no solo produce resultados positivos, sino que se alinea con los principios de economía circular. En consecuencia, se demuestra que una dieta combinada es ideal para abordarla como opción en el tratamiento de residuos de EPS.

  • English

    Plastic is widely used and responsible for negative environmental impacts. Such is the case of expanded polystyrene (EPS), a material that presents revaluation challenges due to its low density. The ability of certain insects larvae, such as Tenebrio molitor, to mineralize plastic has been demonstrated, although its insect farming still focuses on obtaining sustainable protein and biofertilizer. This study investigates the influence of an EPS diet on the larval development of T. molitor for 6 months and examines how the diet affects the volume of biofertilizer collected in this period. Trials were developed with three diets, performing periodic measurements and collection of material. The results indicate that larvae fed a combined substrate, as well as those fed an organic diet, demonstrate survival rates of up to 66%. The final length is lower in the inorganic diet (112 mm), and in the other diets it exceeds 162 mm. Larvae on an inorganic diet did not progress to pupal stage, demonstrated a disappointing lowest Feed Conversion Ratio (3.87) and produced less frass (1.28g), compared to the combined diet which recorded 5.11g. The data suggest that plastic entomoremediation works optimally if larvae are raised on a combined diet substrate of EPS and organic elements. This condition not only produces positive results, but also is aligned well with the principles of the circular economy. Therefore, a combined diet proves to be an ideal candidate for tackling EPS waste.

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