AI Article Synopsis
- PBAT, a biodegradable plastic, has limited research on how it breaks down in anaerobic environments, prompting this study.
- Using sludge from a municipal anaerobic digester and a combination of labeled monomers and proteogenomics, researchers tracked carbon and identified key microorganisms involved in metabolizing PBAT monomers.
- The study found 122 labeled peptides related to specific monomers and identified Bacteroides, Ichthyobacterium, and Methanosarcina as microorganisms actively participating in the biodegradation process under thermophilic conditions.
Article Abstract
PBAT (poly butylene adipate-co-terephthalate) is a widely used biodegradable plastic, but the knowledge about its metabolization in anaerobic environments is very limited. In this study, the anaerobic digester sludge from a municipal wastewater treatment plant was used as inoculum to investigate the biodegradability of PBAT monomers in thermophilic conditions. The research employs a combination of C-labelled monomers and proteogenomics to track the labelled carbon and identify the microorganisms involved. A total of 122 labelled peptides of interest were identified for adipic acid (AA) and 1,4-butanedio (BD). Through the time-dependent isotopic enrichment and isotopic profile distributions, Bacteroides, Ichthyobacterium, and Methanosarcina were proven to be directly involved in the metabolization of at least one monomer. This study provides a first insight into the identity and genomic potential of microorganisms responsible for biodegradability of PBAT monomers during anaerobic digestion under thermophilic conditions.
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| http://dx.doi.org/10.1016/j.biortech.2023.129430 | DOI Listing |
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