Common waste HDPE plastics include shampoo bottles, plastic pipes, rigid plastic bags, etc. The treatment process represented by this dataset includes shredding, washing, dewatering, feeding, and melt extrusion granulation of waste HDPE plastics. The heating process uses electric heating. No dleaning agent is used during washing. The washing and cooling water are recycled after sedimentation in a settling tank, and the sludge from the settling tank is periodically removed and transported by the sanitation department. Activated carbon is used to adsorb volatile organic compounds emitted during the production process, while particulate matter generated during production is collected and released into the atmosphere. Spent activated carbon, waste lubricating oil, and waste filters are treated as hazardous waste and handled by qualified enterprises; non-utilizable solid waste generated from this process is sold to scrap recycling companies.