This document discusses various recycling and recovery routes for plastic solid waste (PSW). It outlines options like re-extrusion, mechanical recycling, chemical recycling, and energy recovery. Mechanical recycling processes PSW into new raw materials through processes like size reduction. Chemical recycling uses advanced technologies like pyrolysis, gasification, and hydrogenation to convert PSW into smaller molecules for use as feedstocks. Thermolysis treatments like pyrolysis and gasification involve processing PSW through heat in different oxygen environments to produce gases. Overall, the document evaluates methods for sustainably treating the growing problem of PSW disposal through recycling or energy recovery.