塑膠製品因其優異的物理、化學性質及價格低廉，已成為現代生活中不可或缺的一部分。其中，聚對苯二甲酸乙二酯（PET）因具備良好的透明性、耐用性及加工性，在包裝材料、纖維製造等領域廣泛應用。根據市場調查數據，2023年全球PET的年產量已高達3,600萬噸，並預期至2028年將增長至4,500萬噸。然而，伴隨PET產量快速增長，其廢棄物問題也愈發嚴重。儘管「循環經濟」的概念逐漸受到關注，但目前全球僅有約10%至15%的PET被回收再利用，其餘85%至90%仍以掩埋或焚燒的方式處理，導致石化資源浪費並進一步加劇環境問題，特別是溫室氣體的排放。為解決廢棄PET的處理困境，本研究利用酵素PETase (LCCICCG) 將PET水解為對苯二甲酸及乙二醇，從而實現PET的循環回收。與傳統的鹼性化學水解相比，酵素水解技術能在更低溫的環境下進行反應，具有顯著的節能優勢。;Plastics have become an indispensable part of modern life due to their excellent physical and chemical properties, as well as their low cost. Among them, polyethylene terephthalate (PET) is widely used in packaging materials and fiber manufacturing because of its high transparency, durability, and processability. According to market research data, the global annual production of PET reached 36 million tons in 2023 and is expected to grow to 45 million tons by 2028. However, alongside the rapid increase in PET production, the issue of PET waste has become increasingly severe. Although the concept of a "circular economy" has gained attention, currently only about 10% to 15% of PET is recycled and reused worldwide, while the remaining 85% to 90% is still disposed of through landfilling or incineration. This leads to the waste of petrochemical resources and exacerbates environmental problems, particularly greenhouse gas emissions. To address the challenges of PET waste management, this study employs the enzyme PETase (LCCICCG) to hydrolyze PET into terephthalic acid and ethylene glycol, thereby achieving PET recycling. Compared to traditional alkaline chemical hydrolysis, enzymatic hydrolysis operates at significantly lower temperatures, offering a distinct energy-saving advantage.
