Recycling Methods for PET Waste Bottles

Plastics consumption in different industries has been expanded and plastics are well make up 10% of solid wastes. Plastic wastes cause various environmental problems because they are non-degradable. Therefore, recycling of these plastics not only protect the ecosystem but also has brings economic advantages. Due to its impermeability and chemical resistance, Poly ethylene terephthalate possess a high consumption rate mostly in preparation of water bottles. Hence, recycling of these bottles becomesessential. Poly ethylene terephthalate wastes bottles recycling methods are; pre-consumer industrial scrap, mechanical and chemical recycling which are surveyed in this paper. Chemical recycling include different methods such as,methanolysis, glycolysis, hydrolysis, ammonolysis, aminolysis and others. Among them, the glycolysis method attracted much more attention in industry regarding lower costs, and also providing diverse products.Also environmental friendly biotechnological methods based on enzyme catalysis are become in attention nowadays under promising investigations, and hopefully could be applicable in industrial scale along with mentioned approaches.