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Biological Valorization of Poly(ethylene terephthalate) Monomers for Upcycling Waste PET

Title
Biological Valorization of Poly(ethylene terephthalate) Monomers for Upcycling Waste PET
Authors
Kim, Hee TaekKim, Jae KyunCha, Hyun GilKang, Myung JongLee, Hyun SookKhang, Tae UkYun, Eun JuLee, Dae-HeeSong, Bong KeunPark, Si JaeJoo, Jeong ChanKim, Kyoung Heon
Ewha Authors
박시재
SCOPUS Author ID
박시재scopus
Issue Date
2019
Journal Title
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN
2168-0485JCR Link
Citation
ACS SUSTAINABLE CHEMISTRY & ENGINEERING vol. 7, no. 24, pp. 19396 - 19406
Keywords
Poly(ethylene terephthalate)Plastic recyclingUpcyclingValorizationTerephthalic acid
Publisher
AMER CHEMICAL SOC
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
Poly(ethylene terephthalate) (PET), composed of terephthalic acid (TPA) and ethylene glycol (EG), is the most commonly produced polyester. Unrecycled PET waste causes serious environmental problems. To increase the PET recycling rate, the upcycling of PET into products that are higher value than PET is desired. In this study, the feasibility of biological valorization of PET for its upcycling was experimentally evaluated. Among the two monomers obtained from the chemical hydrolysis of PET, TPA was biologically converted to five different aromatics and aromatic-derived compounds by using whole-cell catalysts comprising Escherichia coli engineered to express necessary metabolic enzymes for biosynthetic routes for converting TPA. These five higher-value products from TPA, gallic acid, pyrogallol, catechol, muconic acid, and vanillic acid were synthesized via protocatechuic acid as the key intermediate at relatively high molar conversion yields, 32.7-92.5%. The other monomer from PET, EG, was fermented to glycolic acid, a cosmetic ingredient. This is the first experimental validation of producing various higher-value chemicals from PET monomers.
DOI
10.1021/acssuschemeng.9b03908
Appears in Collections:
엘텍공과대학 > 화학신소재공학전공 > Journal papers
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