Biodegradation of PET: Current Status and Application Aspects

Ikuo Taniguchi, Shosuke Yoshida, Kazumi Hiraga, Kenji Miyamoto, Yoshiharu Kimura, Kohei Oda

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Most petroleum-derived plastics, as exemplified by poly(ethylene terephthalate) (PET), are chemically inactive and highly resistant to microbial attack. The accumulation of plastic waste results in environmental pollution and threatens ecosystems, referred to as the "microplastic issue". Recently, PET hydrolytic enzymes (PHEs) have been identified and we reported PET degradation by a microbial consortium and its bacterial resident, Ideonella sakaiensis. Bioremediation may thus provide an alternative solution to recycling plastic waste. The mechanism of PET degradation into benign monomers by PET hydrolase and mono(2-hydroxyethyl) terephthalic acid (MHET) hydrolase from I. sakaiensis has been elucidated; nevertheless, biodegradation may require additional development for commercialization owing to the low catalytic activity of these enzymes. Here, we introduce PET degrading microorganisms and the enzymes involved, along with the evolution of PHEs to address the issues that hamper microbial and enzymatic PET degradation. Potential applications of PET degradation are also discussed.

Original languageEnglish
Pages (from-to)4089-4105
Number of pages17
JournalACS Catalysis
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Ideonella sakaiensis
  • microbial consortium
  • mono(2-hydroxyethyl) terephthalic acid hydrolase (MHETase)
  • PET hydrolase (PETase)
  • PET hydrolytic enzyme (PHE)
  • poly(ethylene terephthalate) (PET)

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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