Hazardous waste pollution prevention and control of environmental information publicity

　　Hazardous waste generation links and main waste types

1. Oil sludge containing metal shavings:Oily wastewater treatment involves processes such as oil separation, air flotation, and sedimentation, which generate floating oil, scum, and sludge (excluding sludge from wastewater biochemical treatment) (900-200-08) HW08

2. Waste mineral oil:Waste mineral oil generated during other production, sales, and use processes, as well as waste packaging materials contaminated with mineral oil (900-249-08) HW08

3. Sludge residue:Waste bath solution, bath residue, and wastewater treatment sludge (336-062-17) HW17 generated from copper plating using copper and electroplating chemicals

4. Filter adsorption medium:Waste packaging materials, containers, and filtration and adsorption media (900-041-49) HW49 containing or contaminated with toxic or infectious hazardous wastes

5. Waste capacitor:Waste circuit boards (including those with or without components removed), as well as discarded CPUs, graphics cards, sound cards, memory chips, capacitors containing electrolyte, and connectors containing precious metals such as gold, generated during the dismantling process of waste circuit boards (900-045-49) HW49

6. Waste filter cartridge:Waste packaging materials, containers, and filtration and adsorption media (900-041-49) HW49 containing or contaminated with toxic or infectious hazardous wastes

Categories and Hazardous Characteristics of Hazardous Wastes

HW08: Toxicity (T), Flammability (I);

HW17: Toxic (T), Corrosive (C);

HW49: Toxic (T), Infectious (In)

whereabouts of hazardous waste

Entrust Tianjin Laoxis Environmental Protection Technology Co., Ltd. and Tianjin Huaqing Baisheng Energy Co., Ltd. to dispose of all hazardous wastes, which shall be packaged and labeled in accordance with environmental protection requirements.

As of the end of December 2025, a total of 98.092 tons of waste mineral oil had been produced and all had been entrusted for disposal, with no surplus; 98.208 tons of sludge had been produced and all had been entrusted for disposal, with no surplus.