Current state and sustainable management of waste polyethylene terephthalate bio-disposal: enzymatic degradation to upcycling

IF 9 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2025-08-01 Epub Date: 2025-04-08 DOI:10.1016/j.biortech.2025.132492

Xiao-Qian Chen , De-Ming Rao , Xu-Yang Zhu , Xiao-Min Zhao , Qing-Song Huang , Jing Wu , Zheng-Fei Yan

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Abstract

Poly (ethylene terephthalate) (PET) is a widely used plastic that leads to significant environmental pollution due to its durability. Enzymatic degradation of PET presents an eco-friendly disposal approach, with potential scalability for industrial applications. This review examines key crucial factors influencing PET enzymatic degradation, including the catalytic efficiency of PET hydrolase, production scalability of PET hydrolase, and recyclability of degraded PET. We outline major advancements in PET hydrolase development, including discovery techniques, functional enhancement strategies, and degradation optimization. Additionally, it assesses the preparation methodologies for PET hydrolase, covering bacterial expression systems, high-density fermentation technologies, and approaches for sustainable catalytic use. The review also discusses upcycling processes for PET hydrolysates, focusing on repolymerization into new plastics or bioconversion into valuable chemicals. Successful achievement of waste PET bio-disposal in industrial-scale n hinges on balancing degradation costs with revenue from upcycling products. Aim at this target, the review further points out the critical challenges, and proposes targeted solutions and expectations.

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聚对苯二甲酸乙二醇酯废物生物处理的现状和可持续管理：酶降解到升级回收

聚对苯二甲酸乙二醇酯（PET）是一种广泛使用的塑料，由于其耐久性而导致严重的环境污染。对 PET 进行酶降解是一种生态友好型处理方法，具有工业应用的潜在可扩展性。本综述探讨了影响 PET 酶降解的关键因素，包括 PET水解酶的催化效率、PET水解酶的生产可扩展性以及降解 PET 的可回收性。我们概述了 PET水解酶开发的主要进展，包括发现技术、功能增强策略和降解优化。此外，报告还评估了 PET水解酶的制备方法，包括细菌表达系统、高密度发酵技术和可持续催化使用方法。该综述还讨论了 PET 水解产物的升级再循环工艺，重点是将其重新聚合为新塑料或生物转化为有价值的化学品。能否成功实现工业规模的废弃 PET 生物处置，取决于降解成本与升级再循环产品收益之间的平衡。针对这一目标，综述进一步指出了关键挑战，并提出了有针对性的解决方案和期望。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.