Biological Valorization of Poly(ethylene terephthalate) Monomers for Upcycling Waste PET
- 주제(키워드) Poly(ethylene terephthalate) , Plastic recycling , Upcycling , Valorization , Terephthalic acid
- 주제(기타) Chemistry, Multidisciplinary; Green & Sustainable Science & Technology; Engineering, Chemical
- 설명문(일반) [Kim, Hee Taek; Song, Bong Keun; Joo, Jeong Chan] Korea Res Inst Chem Technol, Adv Convergent Chem Div, Biobased Chem Res Ctr, 141 Gajeong Ro, Daejeon 34114, South Korea; [Kim, Jae Kyun; Yun, Eun Ju; Kim, Kyoung Heon] Korea Univ, Grad Sch, Dept Biotechnol, 145 Anam Ro, Seoul 02841, South Korea; [Cha, Hyun Gil; Kang, Myung Jong; Khang, Tae Uk] Korea Res Inst Chem Technol, Adv Convergent Chem Div, Biobased Chem Res Ctr, 406-30 Jongga Ro, Ulsan 44429, South Korea; [Lee, Hyun Sook; Park, Si Jae] Ewha Womans Univ, Div Chem Engn & Mat Sci, 52 Ewhayeodae Gil, Seoul 03760, South Korea; [Lee, Dae-Hee] Korea Res Inst Biosci & Biotechnol, Synthet Biol & Bioengn Res Ctr, 125 Gwahak Ro, Daejeon 34141, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2019
- URI http://www.dcollection.net/handler/ewha/000000165840
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acssuschemeng.9b03908
초록/요약
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.
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