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Plastic biodegradation: Frontline microbes and their enzymes.

Ayodeji Amobonye1, Prashant Bhagwat1, Suren Singh1

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Microorganisms like bacteria and fungi can degrade plastic waste, offering a sustainable solution to environmental pollution. This review explores their roles and enzymatic mechanisms in breaking down synthetic polymers.

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Area of Science:

  • Environmental Science
  • Microbiology
  • Biotechnology

Background:

  • Plastic polymers, developed over 150 years, offer desirable properties but pose sustainability threats due to non-biodegradability and waste accumulation.
  • Plastic waste significantly impacts terrestrial and aquatic ecosystems, causing harm through accumulation, leaching, greenhouse gas emissions, entanglement, and ingestion by wildlife.
  • Current waste management methods like incineration, landfilling, and recycling are costly, unsustainable, and environmentally burdensome.

Purpose of the Study:

  • To review the multifaceted roles of microorganisms in degrading synthetic plastics.
  • To highlight the current understanding of how various microorganisms and their enzymes enhance plastic degradation.
  • To identify key areas for future research in microbial plastic degradation.

Main Methods:

  • Literature review focusing on scientific publications concerning microbial plastic degradation.
  • Analysis of studies detailing the roles of actinomycetes, algae, bacteria, and fungi in plastic breakdown.
  • Examination of enzymatic mechanisms and modes of action involved in polymer degradation.

Main Results:

  • Certain microorganisms, including bacteria and fungi, can ingest and metabolize plastic polymers.
  • Microbial enzymes play a crucial role in breaking down synthetic plastics into environmentally benign carbon compounds.
  • The review synthesizes current knowledge on microbial degradation pathways and mechanisms.

Conclusions:

  • Microorganisms offer a promising biological solution for plastic waste management.
  • Further research into microbial enzymes and metabolic pathways is essential for optimizing plastic degradation.
  • Exploring molecular cloning and metabolic pathway design can enhance the efficiency of microbial plastic degradation.