The four main types of recycling of waste plastics are mechanical recycling for granulation, chemical recycling for fuel oil, incineration for heat recovery, and biological recycling for chemicals. These four recycling methods are described in detail below.
Mechanical recycling and granulation
Mechanical recycling granulation is a method of converting plastic scrap into recycled pellets through the steps of a plastic scrap washing machine, scrap plastic crushing machine, and granulation machine. This is a relatively simple and low-cost method for some common types of waste plastics. Plastic recycling can reduce the need for new raw materials and minimize resource waste.
Chemical recycling
Chemical recycling of fuel oil is the chemical treatment of waste plastics to convert them into flammable gaseous or liquid fuels. This method can handle mixed plastics or plastics that are difficult to mechanically recycle into energy. This can reduce dependence on conventional oil.
Incineration for recycling
Incineration for thermal energy recovery By incinerating waste plastics at high temperatures, thermal energy is released for energy recovery. This not only reduces the volume of plastic scrap but also enables the use of the generated thermal energy for power or heat generation.
Bio-recycling
Bio-recycled chemicals, on the other hand, are used to convert waste plastics into renewable chemicals through biodegradation or biotransformation. Compared to the first three types of plastic scrap recycling, the bio-recycling process is environmentally friendly and has a high product value, making it an “upcycling” process.
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