Processing of plastic waste from Klotok Landfill Kediri City with thermal cracking method

This study aimed to determine the characteristics of raw materials and plastic waste thermal cracking solid products at Klotok Landfill Kediri City, through proximate values (water content, volatile matter, and ash content) and the values of heat; liquid, solid, and gas products as an alternative energy source; molecular quality of liquid hydrocarbon products; and the availability of plastic waste as the raw material of the product in meeting the required fuel amount for operating landfill machinery. The raw materials came from the highest types of plastic waste generations in Klotok Kediri Landfill, namely other plastics: HDPE: PP with the variation A, B, and C ratios of 75: 12.5 : 12.5; 12.5 : 75 : 12.5; and 12.5 : 12.5 : 75. This research used the thermal cracking method with Tripod 4M reactor of 1 kilogram capacity with the combustion temperature of 300-400 degrees C for 45 minutes. The proximate and raw material calorific values, as well as products of variations A, B, and C met the standards of Turkey RDF, lignite coal, European Standard, market fuel, and solid products have better quality than the Thailand RDF, making it a potential candidate for use as fuel. The highest percentage of liquid product was produced in variation C with 78.422%, and the highest solid and gas product yields was produced by composition A with 28.578% and 46.690%. The molecular quality of the liquid hydrocarbons in each variation has an aromatic content of 1.04% and the distribution of C atoms of > 50%, indicating its feasibility to be used as a gasoline fuel to meet the total energy consumption for the landfill operating machines. The minimum amount of plastic waste in the landfill to meet the total energy consumption is 20,087.14 kg/day.