Development of a plastic waste treatment process by combining deep eutectic solvent (DES) pretreatment and bioaugmentation with a plastic-degrading bacterial consortium
Issued Date
2023-10-15
Resource Type
ISSN
03043894
eISSN
18733336
Scopus ID
2-s2.0-85171156043
Pubmed ID
37699265
Journal Title
Journal of Hazardous Materials
Volume
460
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Hazardous Materials Vol.460 (2023)
Suggested Citation
Krainara S., Mistry A.N., Malee C., Chavananikul C., Pinyakong O., Assavalapsakul W., Jitpraphai S.M., Kachenchart B., Luepromchai E. Development of a plastic waste treatment process by combining deep eutectic solvent (DES) pretreatment and bioaugmentation with a plastic-degrading bacterial consortium. Journal of Hazardous Materials Vol.460 (2023). doi:10.1016/j.jhazmat.2023.132507 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/90136
Title
Development of a plastic waste treatment process by combining deep eutectic solvent (DES) pretreatment and bioaugmentation with a plastic-degrading bacterial consortium
Other Contributor(s)
Abstract
Polyethylene terephthalate (PET), a petroleum-based plastic, and polylactic acid (PLA), a biobased plastic, have a similar visual appearance thus they usually end up in municipal waste treatment facilities. The objective of this project was to develop an effective PET and PLA waste treatment process that involves pretreatment with deep eutectic solvent (DES) followed by biodegradation with a plastic-degrading bacterial consortium in a composting system. The DES used was a mixture of choline chloride and glycerol, while the bacterial strains (Chitinophaga jiangningensis EA02, Nocardioides zeae EA12, Stenotrophomonas pavanii EA33, Gordonia desulfuricans EA63, Achromobacter xylosoxidans A9 and Mycolicibacterium parafortuitum J101) used to prepare the bacterial consortium were selected based on their ability to biodegrade PET, PLA, and plasticizer. The plastic samples (a PET bottle, PLA cup, and PLA film) were pretreated with DES through a dip-coating method. The DES-coated plastic samples exhibited higher surface wettability and biofilm formation, indicating that DES increases the hydrophilicity of the plastic and facilitates bacterial attachment to the plastic surface. The combined action of DES pretreatment and bioaugmentation with a plastic-degrading bacterial consortium led to improved degradation of PET and PLA samples in various environments, including aqueous media at ambient temperature, lab-scale traditional composting, and pilot-scale composting.