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Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
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Boosting Degradation of Biodegradable Polymers.

Anibal Bher1, Yujung Cho1, Rafael Auras1

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Accelerating the biodegradation of polymers in composting offers a faster, cost-effective alternative to traditional recycling for contaminated materials. This review explores abiotic and biotic methods to speed up polymer decomposition in compost environments.

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Area of Science:

  • Polymer Science
  • Environmental Science
  • Biotechnology

Background:

  • Biodegradation in composting presents a viable end-of-life (EoL) solution for polymers unsuitable for mechanical or chemical recycling.
  • Current compostability certification processes are lengthy and costly, hindering the adoption of new biodegradable materials.
  • Accelerated biodegradation methods can streamline the evaluation and selection of compostable polymers.

Purpose of the Study:

  • To review recent advancements, challenges, and future strategies for accelerating polymer biodegradation under composting conditions.
  • To explore methods for modifying polymer properties and the compost environment to enhance decomposition rates.
  • To identify promising abiotic and biotic approaches for faster biodegradation assessments.

Main Methods:

  • Review of literature on abiotic strategies: additive incorporation, molecular weight reduction, size reduction, reactive blending, self-immolative concepts, and triggered chain scission.
  • Review of literature on biotic strategies: enzyme dispersion/encapsulation, environmental biostimulation, and microbial bioaugmentation.
  • Analysis of methods for modifying polymer structure and compost environment.

Main Results:

  • Abiotic methods like additive incorporation and molecular weight reduction are straightforward and adaptable.
  • Novel abiotic approaches such as self-immolative polymers and triggered chain scission show future potential.
  • Biotic methods including enzyme application, biostimulation, and bioaugmentation are promising for accelerating biodegradation.

Conclusions:

  • Both abiotic and biotic strategies can significantly accelerate the biodegradation of polymers in composting.
  • Simple abiotic modifications offer immediate applicability, while novel methods and biotic approaches present advanced solutions.
  • Faster biodegradation assessment facilitates the development and adoption of sustainable compostable polymer alternatives.