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Updated: Aug 5, 2025

Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials

Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials

Published on: May 16, 2022

Fungal Screening for Potential PET Depolymerization.

Lusiane Malafatti-Picca¹, Elaine Cristina Bucioli¹, Michel Ricardo de Barros Chaves²

¹Environmental Studies Center (CEA), São Paulo State University (UNESP), Av. 24-A, 1515, Bela Vista, Rio Claro 13506-900, SP, Brazil.

|March 29, 2023

Summary

This summary is machine-generated.

Fungi strains efficiently depolymerize polyethylene terephthalate (PET) plastic, converting it into terephthalic acid. This microbial hydrolysis offers a promising, eco-friendly solution for PET waste recycling and monomer recovery.

Keywords:

biodegradation enzymatic catalysis polymers terephthalic acid

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Area of Science:

Biotechnology
Environmental Science
Polymer Science

Background:

Polyethylene terephthalate (PET) plastic waste poses a significant environmental challenge, with billions of bottles discarded annually.
Microbial hydrolysis offers a sustainable approach to PET recycling by breaking down polymers into monomers.
Fungal metabolic activity presents an eco-friendly strategy for degrading plastic waste and producing valuable monomers.

Purpose of the Study:

Investigate fungal strains for their potential in depolymerizing PET from various sources.
Identify optimal culture media to enhance the PET depolymerization process.
Characterize fungal enzymes involved in PET biodegradation for recycling applications.

Main Methods:

Screening 100 fungal strains for PET depolymerization capabilities.
Conducting fermentation assays with PET nanoparticles (npPET) and selected fungal strains.
Analyzing biodegradation using mass variation, SEM, FTIR, and enzymatic activity assays (lipase, esterase, cutinase).
Quantifying released monomers/oligomers via HPLC-UV.

Main Results:

Four fungal strains (Curvularia trifolii, Trichoderma sp., T. atroviride, C. cladosporioides) showed promising PET depolymerization.
Terephthalic acid release exceeded 12 ppm in fermentation assays.
Biodegradation was evidenced by mass loss, surface changes (SEM), chemical modifications (FTIR), and enzymatic activities.

Conclusions:

Selected microbial strains demonstrate significant potential for PET biodegradation.
The identified fungal enzymes are applicable to PET recycling processes.
This study provides a foundation for further exploration of microbial solutions for plastic waste management.