Emerging Biochemical Conversion for Plastic Waste Management: A Review.

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Global plastic waste accumulation poses significant environmental and health risks.
• Conventional plastic waste management methods have limitations, necessitating novel approaches.
• Emerging chemical and biological technologies show potential for plastic waste valorization.

Purpose of the Study:

• To provide a comprehensive review of recent advancements in chemical and biological plastic waste conversion technologies.
• To analyze technical parameters, mechanisms, and characteristics of these innovative methods.
• To highlight the need for economic and life cycle assessments for future research.

Main Methods:

• Review of literature from the past five years on plastic waste conversion.
• Exploration of chemical methods: hydrolysis, hydrogenolysis, alcoholysis, ammonolysis, pyrolysis, photolysis.
• Examination of biological methods: microbial and enzymatic degradation.

Main Results:

• Chemical methods effectively break down polymers into smaller molecules via depolymerization.
• Biological methods utilize microorganisms/enzymes for plastic degradation and assimilation.
• Economic and life cycle assessments are crucial for evaluating technology viability.

Conclusions:

• Chemical and biological technologies offer viable pathways for plastic waste utilization.
• Addressing technological, economic, and scalability challenges is key for implementation.
• Further research is essential to promote sustainable plastic waste management solutions.