... for the plastics, the PE is best, any PE,like LDPE AND HEPE are good.The PP is also good. If pure PE, the oil percentage ... coal or firewood.And elctricity is less. Because this pyrolysis machine, the main power is the heating fuel costs. There is one speed reducer ... most 4 workers. And the water is used circlely, use little.So you can see, the main investment is on the machine and your raw material, ...