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Systematic review of the state of the art of the biodegradation of low-density polyethylene and polyethylene terephthalate
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Researchers systematically reviewed studies from 2016 to 2021 on microbial and enzymatic biodegradation of low-density polyethylene and polyethylene terephthalate, finding incremental but promising advances in isolating plastic-degrading organisms while noting that degradation rates remain far too slow for practical large-scale waste management.
Esta investigación se enfocó en presentar un panorama de las investigaciones que se han realizado a partir de 2016 hasta 2021 respecto a la biodegradación de polietileno y tereftalato de polietileno, debido a que esta se presenta como una alternativa sostenible para el manejo de estos residuos. Se ejecutó una revisión sistemática de la literatura científica la cual permitió dar con 1394 resultados de los cuales se seleccionaron 62 que fueron categorizados de acuerdo con los materiales utilizados, pretratamientos, condiciones de cultivo, microorganismos y métodos de evaluación de la biodegradación. Se encontró que en la mayoría de estudios se efectuó la biodegradación sin pretratamiento, sin embargo, el pretratamiento más aplicado fue la fotooxidación, así mismo se ha estudiado el uso de surfactantes como pretratamiento y como coadyuvante en el medio de cultivo. Los microorganismos más estudiados fueron las bacterias, especialmente de los géneros Bacillus y Pseudomonas, respecto a los hongos, el género más estudiado fue el Aspegillus y se encontró poca investigación del uso de consorcios microbianos. Los métodos de evaluación de la biodegradación más aplicados fueron el microscopio electrónico de barrido (SEM), la espectroscopía infrarroja por transformada de Fourier (FTIR) y la prueba por pérdida de masa. A partir del porcentaje de pérdida de masa se calculó la tasa de biodegradación la cual se usó como criterio de comparación de los resultados de los diferentes estudios.
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This systematic integrative review analyzes plastic biodegradation research from 2015 to 2023 across China, the United States, and Brazil, finding growing interest in bacteria, fungi, and yeast capable of decomposing polymers like PET, PE, and PS, while identifying key challenges such as the need for pre-treatments and scalable processes before practical application.
Biodegradación de polietileno de baja densidad en suelo con hongos del género Aspergillus sp.
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Researchers tested whether three Aspergillus fungal species could biodegrade low-density polyethylene (LDPE) plastic in soil over 30 and 60 days, finding that a consortium of all three species achieved up to 18.45% degradation of thinner LDPE samples within 60 days. These results suggest Aspergillus fungi hold biotechnological potential as a biological strategy to mitigate plastic pollution in soil environments.
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Researchers isolated 12 fungal strains from a Colombian landfill and identified three isolates — belonging to genera including Trichoderma — capable of biodegrading low-density polyethylene (LDPE), highlighting the potential of landfill-derived microorganisms as candidates for plastic biodegradation strategies.
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This review examines the current state of polyethylene biodegradation by bacteria and fungi, one of the most widely used and difficult-to-degrade plastics. Researchers found that factors such as surface hydrophobicity, physical pretreatment, and environmental conditions significantly influence microbial degradation rates, with biodegradation involving biofilm formation, fragmentation, and eventual mineralization.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.