包装废弃PET瓶的处理及再生资源化技术研究进展

Recent Research Progress in Reclamation and Recycling of Waste PET Bottles

废弃PET作为生活与工业中随处可见的固体废弃物之一,因其具有稳定的物理化学特性而难以在自然界中降解,是目前需要回收处理的重要固体废弃物之一。概括了废弃PET主要有三种回收技术,即物理回收法、化学回收法和生物回收法,并分别简述三种回收法的原理、优缺点和研究现状。可见,回收废弃PET主要采用物理回收法,化学回收法作为辅助技术,生物回收法仍处于研究阶段。化学回收法能有效实现废弃PET资源的高效利用,因而我国在废弃物处理技术发展进程中的关键是通过化学回收法将废弃PET进行高效率降解转化,再将产物用于制备新型的高纯度化工原料,以提高废弃PET的再生资源化利用率,使利用率达到90%以上。

Waste PET bottle is one of the main solid wastes that can be found everywhere in daily life and industry.Owing to the stable physical and chemical properties of waste PET,it is difficult to degrade and is one of the wastes which needs recycling in nature.The current production of PET and the recycling of waste PET in several major countries were summarized into three main approaches as physical,chemical and biological methods.The principles,development status,advantages and disadvantages of the three main methods were briefly described.The results showed that the current method for large-scale treatment of waste PET was still the physical method.Chemical method was employed as an auxiliary technology,and biological method has still been undergoing research stage.Chemical method might realize the efficient use of waste PET resources.It was possible that the high-efficiency degradation of waste PET could be carried out to prepare new high-purity chemical raw materials according to chemical methods,so as to further improve the recycling resource utilization rate of waste PET up to over 90%.In future,it could be one of the key technologies in waste treatment technology in China.