A Reliable Methodology to Determine Biotransformation of Pbat in Anaerobic Conditions

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2024 Denmark Publisher:Elsevier BVJournal:Bioresource Technology, volume 424, page 132,242 (issn: 0960-8524,

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Authors: Alba Trueba-Santiso; Reinhard Wimmer; Mathias Eskildsen; Juan Cubero-Cardoso; Juan M. Lema; Jeppe Lund Nielsen;

doi: 10.2139/ssrn.5039568 , 10.1016/j.biortech.2025.132242

pmid: 39986631

A Reliable Methodology to Determine Biotransformation of Pbat in Anaerobic Conditions

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Abstract

Biodegradable plastics can enhance food waste utilization in anaerobic digestion (AD) units, but their fate under thermophilic conditions remains unclear. Previous studies using methane production, calorimetry, or spectroscopic analyses often report inconsistent results. This study tracks the biotransformation of polybutylene adipate co-terephthalate (PBAT) in thermophilic AD (55 °C) using 1H NMR to quantify monomers. While 1,4-butanediol degraded quickly, adipic (AA) and terephthalic acid (TPA) accumulated over time. Monomer analysis estimated PBAT biotransformation at 11.1 ± 1.9 % (TPA) and 10.1 ± 2.3 % (AA). The core microbial community remained stable, indicating intrinsic hydrolytic capacities, which were stable despite TPA and AA accumulation. This workflow provides a robust methodology to evaluate the biotransformation of plastics.

Country

Denmark

Related Organizations

University of Santiago de Compostela
Spain
University of Bath
United Kingdom
Aalborg University Library (AUB)
Denmark
Aalborg University
Denmark

Keywords

Polyesters, Adipates, H NMR, Phthalic Acids, Plastic, Biodegradation, Environmental, Thermophilic, Anaerobic digestion, PBAT, Metagenomics, Anaerobiosis, Butylene Glycols, Biotransformation

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