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FAQ of Ministry of Ecology and Environment on Hazardous Wastes

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2022-10-13

FAQ of Ministry of Ecology and Environment on hazardous wastes

FAQs About Hazardous Wastes

1. Question: Is the packaging container of MDI (diphenylmethane diisocyanate) hazardous waste? How to determine whether the packaging containers of chemical raw materials used in the production process are hazardous waste? For example, are empty barrels of industrial alcohol and industrial acetic acid hazardous wastes?
A: Diphenylmethane diisocyanate (MDI) is listed in the Catalogue of Hazardous Chemicals (2015), CAS No. 26447-40-5.
According to the National Catalogue of Hazardous Wastes (2021 Edition), hazardous chemicals listed in the Catalogue of Hazardous Chemicals (excluding hazardous chemicals that only have the physical hazard of "pressurized gas" in the catalogue) declared by the owner to be discarded, or those that have not declared to be discarded but have been illegally discharged, dumped, utilized and disposed, and those collected or received by relevant departments according to law and need to be destroyed, belong to hazardous wastes, and the hazardous characteristics include toxicity.
Waste packaging and containers containing or contaminated with toxic and infectious hazardous waste are hazardous waste, code 900-041-49.

2. Question: The oily wastewater generated by the enterprise is mainly the production wastewater generated by the cleaning process of heat treatment. Before the completion of the sewage plant, it will be signed off as hazardous waste. Later, after the completion of the sewage treatment plant, can the wastewater be discharged into the sewage treatment plant after it is treated by the self built wastewater treatment facilities in the plant and reaches the water quality standard of the sewage plant?
Answer: According to 7.2 of the General Rules for the Identification of Solid Wastes, waste water and sewage that can meet the requirements of relevant regulations and discharge standards for discharge to environmental water bodies or municipal sewage pipe networks and treatment facilities after physical treatment, chemical treatment, physical and chemical treatment, biological treatment and other wastewater treatment processes are not managed as liquid wastes. Oily wastewater does not belong to hazardous waste. Please improve the management plan in time and declare and register truthfully.

3. Q: Our company is a machining enterprise, which has a die-casting process. The production process is: melting - die-casting - machining - assembly - inspection. The pure aluminum ingot is melted into aluminum liquid, injected into the die-casting mold to form the product rough embryo, and then processed by machine, finally assembled, inspected and shipped. Slag remover and refining agent are not used for pure aluminum ingot melting, but a small amount of aluminum slag (impurities during pure aluminum ingot melting) will be produced. The aluminum content of this aluminum slag is more than 70%. Is this aluminum slag a hazardous waste? I checked the list of hazardous wastes in the next 2021 edition, and found that only aluminum ash produced in 091 (mining and beneficiation of commonly used non-ferrous metals), 321 (smelting of commonly used non-ferrous metals), and 323 (smelting of rare and rare earth metals) industries belongs to hazardous wastes.
Answer: According to the National Catalogue of Hazardous Wastes (2021), aluminum ash and slag generated on the surface of waste aluminum and aluminum ingot remelting, refining, alloying and casting melt, as well as salt slag and secondary aluminum ash generated in the process of aluminum recycling, are hazardous wastes, code 321-026-48. The industry code in the Directory refers to the main industrial source of this kind of waste, not the only source. Therefore, when determining whether the waste belongs to the hazardous waste and its category included in the List, the principle of giving priority to the waste description, supplemented by the industry source should be adopted. In case of contradiction or inconsistency between the two, the waste description should be taken as the main judgment basis.

4. Question: Is the discarded slaked lime [Ca (OH) 2 powder] from industrial production raw materials a hazardous waste or a general solid waste?
Answer: Is the discarded hydrated lime [Ca (OH) 2 powder] from industrial production raw materials a hazardous waste or a general solid waste? A: The National Catalogue of Hazardous Wastes (2021 Edition) clearly states that other strong alkaline solid alkalis and alkaline residues produced in the production process that are invalid, deteriorated, unqualified, eliminated and fake are hazardous wastes, with code 900-399-35. It is recommended to analyze the corrosivity of the discarded hydrated lime. According to the analysis requirements of Identification Standard for Hazardous Wastes Corrosivity GB5085.7, if the pH value does not exceed 12.5, it is recommended to manage general industrial solid waste

5. Q: The natural drinking water production enterprise is equipped with a simple laboratory, which mainly tests common microorganisms. The composition of the culture medium is mainly resin and nutrients. Is the waste culture medium produced after high-temperature disinfection belong to HW49 (900-047-49)? Or is it general solid waste?
A: According to the National Catalogue of Hazardous Wastes, the chemical and biological laboratories produce cyanide, fluoride and heavy metal containing inorganic waste liquid and the residue and residual liquid from the treatment of inorganic waste liquid, the organic waste liquid containing mineral oil, organic solvent, formaldehyde, waste acid, waste alkali, residual samples with hazardous characteristics, as well as disposable experimental supplies, packaging materials, filtering and adsorption media contaminated with the above substances, which belong to hazardous wastes, Code 900-047-49. Substances that are not included in the List and exclude hazardous characteristics are not managed as hazardous wastes.

6. Q: For the aluminum die casting processing project, a new aluminum ingot is used as the raw material. After the aluminum ingot is melted, there is a small amount of slag. Excuse me, is this slag a hazardous waste?
Answer: According to the National Catalogue of Hazardous Wastes (2021), the aluminum ash generated from the transfer, refining, alloying of electrolytic aluminum melt, the aluminum ash generated from the melt surface in the process of casting, and the aluminum ash generated from the remelting, refining, alloying of aluminum ingots and the surface of casting melt in the process of aluminum processing are all hazardous wastes, and the codes are 321-024-48 and 321-026-48 respectively.

7. Question: The barrel that once held gasoline temporarily only has a little smell of gasoline. Is this barrel a hazardous waste? In the 2021 edition of the National Catalogue of Hazardous Wastes, only 900-201-08 mentioned that "waste kerosene, diesel oil, gasoline and other solvent oils produced by petroleum and coal refining in the process of cleaning metal parts". Can this barrel containing gasoline be treated as 900-201-08?
A: According to the National Catalogue of Hazardous Wastes (2021), other waste packages contaminated with mineral oil generated in the process of production, sales and use are hazardous wastes, code 900-249-08.

8. Question: Is heat transfer oil a hazardous waste? What is the corresponding hazardous waste code type?
Answer: The hot kerosene replaced by the heat transfer oil furnace is a hazardous waste, which corresponds to the "waste mineral oil and waste packaging contaminated with mineral oil" (900-249-08) in the list of hazardous wastes.

9. Question: Is bisphenol A solid epoxy resin a hazardous waste?
Answer: Bisphenol A epoxy resin, because of its toxicity, is included in the HW13 organic resin waste category of the National Catalogue of Hazardous Wastes.

10. Question: Is the aluminum oxide used for drying the enterprise air compressor a hazardous waste?
Answer: Aluminum oxide can be used as desiccant, adsorbent and other purposes. It should be identified according to the specific process and substances of its adsorption and drying.

11. Question: Are oil sludge from oil tanks and waste residue from oil separators hazardous wastes?
Answer: According to the national hazardous waste directory, the sludge from mineral oil tanks and oil-water separation facilities are hazardous wastes. The specific code of sludge in mineral oil tank is 900-221-08, and the specific code of oily scum, sludge and oil slick in oil-water separation facilities is 900-210-08.

12. Question: Is the stretching oil, stretching paste produced by cleaning the machine and the waste packaging barrels produced after use hazardous waste?
Answer: The stretching oil and paste produced by cleaning the machine are hazardous wastes. The waste packaging barrels generated after the use of stretching oil and stretching paste belong to hazardous waste (classified according to the code of waste mineral oil and waste packaging contaminated with mineral oil generated in the process of production, sales and use, belonging to 900-249-08 waste).

13. Question: Is the waste and leftover materials produced after the molding of unsaturated polyester resin dough materials by injection molding hazardous waste?
Answer: The waste leftovers generated from the molding materials of unsaturated polyester resin dough after thermal curing by the injection molding machine (temperature is about 100 ℃) are not hazardous wastes.

14. Question: Is the waste insulation cotton a hazardous waste? Is the insulation cotton made of aluminum silicate and glass wool hazardous waste? If it belongs to waste code, what kind of classification does it belong to?
Answer: If the waste insulation cotton is asbestos, it is a hazardous waste "asbestos waste (900-032-36) generated from the maintenance and replacement of facilities containing asbestos materials such as diaphragms and thermal insulators and the replacement of vehicle brake linings". If the insulation cotton is made of aluminum silicate and glass wool, the hazardous waste shall be identified according to the fineness and toxicity of the fiber.

15. Q: Active carbon contains one thousandth of ion exchange resin. Is it ordinary waste or hazardous waste?
A: According to the National Catalogue of Hazardous Wastes, waste activated carbon generated in the production process of the chemical industry belongs to hazardous waste, code 900-039-49; The waste ion exchange resin belongs to hazardous waste, code 900-015-13.

16. Question: Is the nickel metal hydride battery a hazardous waste? If yes, what is the code in the hazardous waste directory?
A: According to the National Catalogue of Hazardous Wastes, discarded lead batteries, nickel cadmium batteries and mercury oxide batteries are hazardous wastes. Nickel metal hydride battery is not listed temporarily.

17. Question: Are waste copper wire and waste shaving wire containing cutting fluid hazardous wastes? What is the obsolescence category?
Answer: Waste cutting fluid is listed in the National Catalogue of Hazardous Wastes. The waste is classified as HW09, and the hazardous property is toxicity. The waste copper wire and waste gouging wire mixed with cutting fluid shall be managed as hazardous waste (see No. 9 of exemption list).

18. Question: Does the ink bucket with ink belong to hazardous waste?
Answer: According to the National Catalogue of Hazardous Wastes, the invalid, deteriorated, unqualified, obsolete and fake inks, dyes, pigments and paints (excluding water-based paints) generated in the process of production, sales and use belong to hazardous wastes. The code of the wastes is 900-299-12, and the hazardous property is toxicity. Waste packages and containers containing or contaminated with toxic hazardous waste are hazardous waste, and the waste code is 900-041-49.

19. Question: Is the oily rag produced by the enterprise a hazardous waste?
Answer: According to the National Directory of Hazardous Wastes, the exemption condition for waste oily rags is not classified collection, and the exemption content is that the whole process is not managed as hazardous waste, but the property of hazardous waste is not changed. In addition, according to the classification requirements of domestic waste and solid waste management requirements, such waste shall not be intentionally mixed with domestic waste.

20. Question: Does the whole piece of waste circuit board that has not been disassembled belong to the national hazardous waste directory? What kind of waste code does it belong to?
A: According to the National Catalogue of Hazardous Wastes, waste circuit boards (including the waste circuit boards with or without components removed), and waste CPU, video card, sound card, memory, capacitor containing electrolyte, gold and other precious metal connectors generated during the disassembly of waste circuit boards belong to hazardous wastes, code 900-045-49.

21. Question: According to 900-252-12 "Waste generated in the process of painting and painting with paint (excluding water-based paint) and organic solvent", is water-based paint residue not a hazardous waste?
Answer: "excluding water-based paint" means that water-based paint residue does not belong to the hazardous waste listed in the National Catalogue of Hazardous Wastes (2021 Edition). Whether it belongs to hazardous waste needs to be determined according to the Identification Standard for Hazardous Wastes (GB5085.1~7), Technical Code for Identification of Hazardous Wastes (HJ298), etc.

22. Q: Is the acid in waste lead-acid batteries managed as waste acid or lead containing waste?
Answer: HW31 lead containing waste specifies that the waste lead plate, waste lead paste and acid produced during the disassembly of waste lead batteries in non specific industries belong to HW31 (specific code 900-052031).

23. Question: Is the circulating water and sludge in the circulating water tank used in the overhaul slag wet treatment facility a 772-006-49 waste?
Answer: First, we should judge whether the circulating water belongs to solid waste according to the General Principles of Solid Waste Identification Standards. If it does not belong to solid waste, it does not belong to hazardous waste. The sludge in the circulating water tank used for the overhaul slag wet treatment facility belongs to 772-006-49 waste.

24. Question: Does 900-047-49 include laboratory waste generated by the enterprise's laboratory.
A: Yes.

25. Question: 336-100-21 and 336-100-17 both contain "waste tank liquid, tank residue and waste water treatment sludge generated by anodizing with chromic acid". What are the considerations?
A: The hazardous wastes in the National Catalogue of Hazardous Wastes (2021 Edition) are classified according to the source of production and the composition of substances. The classification system is not unified. In the current National Catalogue of Hazardous Wastes (2021 Edition), they are classified under HW17 and the sources of production are classified. However, considering that there are many sources of such wastes, in order to avoid the problem of poor transfer and disposal of a large number of wastes due to the change of waste codes in the short term, special transitional treatment is adopted, and such wastes are still retained in HW21 of the new National Directory of Hazardous Wastes (2021 Edition).
Therefore, after the implementation of the new National Catalogue of Hazardous Wastes (2021 Edition), this kind of waste can be classified into two categories in the management process, and facilities with 336-100-21 and 336-100-17 utilization and disposal qualifications can handle this kind of waste.

26. Question: should the dust from stainless steel electric furnace steelmaking be included in HW21 or HW23?
Answer: The dust from stainless steel steelmaking mainly contains zinc, so it should be classified as HW23.

27. Q: 900-041-49 "Waste packaging, containers, filtering and adsorption media containing or contaminated with toxic and infectious hazardous waste" belongs to hazardous waste. Does the waste packaging containing or contaminated with corrosive and flammable hazardous waste belong to the waste in the National Catalogue of Hazardous Wastes?
A: It is generally believed that it is not, but if it is suspected of being a "mixture of hazardous waste and other solid waste", it should be handled according to the serial number of question 93.

28. Question: 221-002-35 "Waste alkali liquor from cooking and pulping during alkaline pulping" refers to black liquor or white liquor from papermaking?
Answer: The black liquor and white liquor from alkaline pulping (caustic soda and sulfate) belong to waste alkali liquor, which belongs to the 221-002-35 category of wastes in the National Catalogue of Hazardous Wastes (2021 Edition).

29. Q: How to understand the "high boiling point" in 900-013-11 "High boiling point residues produced by distillation, distillation and pyrolysis processes in other chemical production processes (excluding biomass based processing)"?
Answer: The boiling points of the purified substances and their impurities in the process of distillation, distillation and pyrolysis are different, ranging from high to low. Those with higher boiling points than the substances to be obtained are called "high boiling point impurities". Therefore, the residue in the bottom of the bus after purification in the process of distillation, distillation and pyrolysis belongs to "high boiling residue".

30. Q: How do you understand the "waste ion exchange resin generated during industrial wastewater treatment" in 900-015-13 waste? Is the waste ion exchange resin produced during the treatment of boiler softened water in industrial enterprises such waste?
Answer: The industrial wastewater mentioned in this clause refers to the wastewater generated in the process production of industrial enterprises, excluding the softened water of industrial enterprises' boilers. Therefore, the waste ion exchange resin produced in the process of boiler softening water treatment in industrial enterprises does not belong to this kind of waste.

31. Q: Is the waste liquid generated during the online monitoring by a third party's operation a hazardous waste? Can he handle the waste liquid according to the agreement?
Answer: According to the Guidelines for Identification of Solid Wastes, the online monitoring waste liquid belongs to solid waste. Whether it is hazardous waste shall be determined according to the national standards and methods for identification of hazardous waste. The waste liquid of COD online monitor often contains strong acid, mercury, chromium and other heavy metals. In practice, it is managed as hazardous waste with waste code 900-047-49.

32. Q: Is the oily sewage generated by offshore ships to be included in hazardous waste management?
Answer: According to the relevant provisions of the Water Pollution Prevention and Control Law, the discharge of oily sewage and domestic sewage from ships should meet the standards for pollutant discharge from ships. When entering inland rivers and ports, ocean shipping vessels shall observe the standards for pollutant discharge by inland ships. Residual and waste oil from ships shall be recovered and shall not be discharged into water bodies. The Provisions on Port Operation and Management of the Ministry of Communications and other regulations require that those who provide ships with facilities such as docks, lighterage anchorages, buoys, etc. should have the corresponding capacity to receive pollutants and wastes from ships and the corresponding capacity to deal with pollution emergencies, including necessary facilities, equipment and apparatus. Therefore, the oily wastewater from the ship shall be delivered to the corresponding treatment facilities at the wharf for treatment according to the regulations. The waste mineral oil generated from sewage treatment by the corresponding treatment facilities at the wharf belongs to hazardous waste and must be treated by a qualified unit.

33. Q: Is the product turnover drum a solid waste?
Answer: It is a common practice for relevant industries to clean turnover barrels contaminated with trace products and reuse them. Having cleaning capacity is a necessary condition for enterprises to realize the reuse of turnover barrels. Therefore, on the premise that the enterprise has the ability to clean product turnover barrels, turnover barrels contaminated with trace products can be considered as "materials that can be used for their original purposes without repair and processing", that is, they are not managed as solid wastes. At the same time, the product manufacturer shall assume the responsibility for pollution prevention and control during the collection, storage, transportation, cleaning and other processes of product turnover barrels, and take effective measures to avoid environmental pollution.

34. Question: What kind of hazardous waste is the waste tin slag produced after tin plating?
Answer: The classification of wastes in the list of hazardous wastes should be based on the characteristics of wastes. It is recommended that waste tin slag generated in the production process of PCB industry be treated as per 336-059-17.

35. Question: What hazardous wastes are mainly produced by scientific research institutions and university laboratories?
Answer: According to the relevant provisions of the "900-047-49" waste in the "HW49 Other Wastes" of the National Catalogue of Hazardous Wastes, in the activities of production, research, development, teaching and environmental testing (monitoring), chemical and biological laboratories (excluding infectious medical laboratories and laboratories of medical institutions) produce cyanide, fluoride, heavy metal inorganic waste liquids and residues and residues from the treatment of inorganic waste liquids, which contain mineral oil, organic solvents Formaldehyde organic waste liquid, waste acid, waste alkali, residual samples with dangerous characteristics, and disposable laboratory supplies contaminated with the above substances (excluding discarded beakers, measuring instruments, funnels and other laboratory supplies after cleaning according to laboratory management requirements), packaging materials (excluding reagent packaging materials and containers after cleaning according to laboratory management requirements), filtering and adsorption media, etc.

36. Q: What are the typical hazardous wastes in the automobile repair industry?
Answer: Generally, waste engine oil filter element (900-041-49), waste lead acid battery (900-044-49), waste activated carbon (900-041-49), waste paint bucket (900-041-49), waste organic solvent (900-040-06), waste catalyst for vehicle exhaust purification (900-049-50), waste filter cotton (900-041-49), waste oil paint residue (900-252-12), etc.

37. Question: How often should medical wastes be cleared and transported?
Answer: According to the Medical Waste Management Regulations, the temporary storage time of medical waste shall not exceed 48 hours.

38. Q: How should pesticide packaging waste be managed?
Answer: The Measures for the Administration of the Recycling and Disposal of Pesticide Packaging Wastes (Decree No. 6 in 2020 of the Ministry of Agriculture and Rural Affairs and the Ministry of Ecology and Environment) will be implemented from October 1, 2020. Pesticide operators and pesticide packaging waste recycling stations (points) should establish a ledger for the recycling of pesticide packaging waste, record the quantity and destination of pesticide packaging waste, and transport vehicles should meet the requirements of rain, leakage, and spill prevention. The resource utilization of pesticide packaging waste shall not be used to manufacture catering appliances, children's toys and other products to prevent harm to human health. The resource utilization unit shall not resell pesticide packaging waste.

39. Q: Can the manufacturer recycle the waste packaging barrels?
Answer: Part 6 of the General Principles for the Identification of Solid Wastes (GB34330-2017) clearly states that any substance that can be used for its original purpose without repair and processing is not a solid waste, and certainly not a hazardous waste. Therefore, packages and containers containing or directly contaminated with hazardous waste used for original purposes are not hazardous waste and can be directly recycled. However, the manufacturer needs to re process the waste packaging barrels (including cleaning) and sell them together with the products - this situation cannot be recycled by the manufacturer!

40. Q: Can waste lead-acid batteries be delivered to the sales outlets?
Answer: Recycling outlets under the pilot units participating in the extended producer responsibility system can be recycled. The specific pilot units shall be announced by the Provincial Department of Ecological Environment.

41. Q: Can the waste acid of the enterprise be discharged into the sewage treatment facilities in the plant?
Answer: The precondition for the enterprise is that the construction of sewage treatment and disposal facilities in the plant should strictly comply with the requirements of the EIA document to ensure the stable discharge of treatment and disposal facilities up to the standard. Do not dilute the emission!

42. Q: How to manage laboratory waste?
Answer: All waste generating units in the laboratory should do a good job of classified collection according to the relevant requirements of the Technical Code for Collection of Laboratory Waste Chemicals (GB/T31190-2014) and the Pollution Control Standard for Hazardous Waste Storage (GB8597-2001
Such high-risk substances (except for highly toxic drugs), highly toxic waste reagents, flammable and explosive substances, and medical wastes generated in laboratories shall be classified and stored by seven methods. The management systems such as hazardous waste declaration and registration, management plan filing, and transfer forms shall be implemented according to relevant laws and regulations, so as to achieve classified collection and storage, and entrusted disposal according to law.

43. Q: What about the disposal of discarded lithium batteries in laptops?
Answer: The un disassembled lithium battery is not a hazardous waste and should be recycled as a general industrial solid waste.

44. Q: When deciding whether the waste belongs to the hazardous waste and its category listed in the National Catalogue of Hazardous Wastes (2021 Edition), do you give priority to industrial sources or waste description?
A: Hazardous waste comes from a wide range of sources. There is a phenomenon that the same kind of waste comes from multiple industries. The industry code in the National Catalogue of Hazardous Wastes (2021 Edition) refers to the main industrial source of this kind of waste, not the only source. Therefore, when determining whether wastes belong to hazardous wastes and their categories included in the National Catalogue of Hazardous Wastes (2021), the principle of giving priority to waste description, supplemented by industry sources should be adopted. In case of contradiction or inconsistency between the two, the waste description should be taken as the main judgment basis.

45. Q: As an industrial cluster base, a temporary storage room for common hazardous wastes is built. The settled enterprises hand over the hazardous wastes to the park for unified registration and management, and then the park entrusts a qualified hazardous waste disposal company for disposal. Does the park need to apply for the corresponding hazardous waste business license?
Answer: According to Article 80 of the Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste, units engaged in the collection, storage, utilization and treatment of hazardous waste shall apply for a license in accordance with relevant national regulations.

46. Q: Our company pretreated domestic waste incineration fly ash HW18 (772-002-18) by water washing process, and the fly ash after chlorine removal by water washing was sent to the cement kiln for collaborative disposal. According to the list of hazardous waste exemption management, if the collaborative disposal process of domestic waste incineration fly ash cement kiln is not managed as hazardous waste, can we not apply for a hazardous waste business license?
Answer: According to the National Catalogue of Hazardous Wastes, after fly ash pretreatment, if it meets the requirements of the Standard for Pollution Control of Solid Wastes Co disposed in Cement Kilns and the Technical Code for Environmental Protection of Solid Wastes Co disposed in Cement Kilns, it can be co disposed in cement kilns. The disposal process is not managed as hazardous waste, but the transfer process still needs to implement the hazardous waste transfer manifest. The cement kiln cooperative disposal unit that plans to receive fly ash shall register the information of "Exemption Unit - Cement Kiln Cooperative Disposal Unit" on the provincial solid waste environmental supervision platform as required, which shall be reviewed and checked by the local competent ecological environment department.

47. Q: What standards should be followed for the construction of temporary collection and storage warehouses for general industrial solid wastes in the enterprise, or should they meet the basic "three prevention" conditions?
Answer: The storage facilities for general industrial solid waste shall meet the relevant standards and statutory requirements of the Standard for Pollution Control on the Storage and Landfill of General Industrial Solid Waste (GB 18599), the Environmental Protection Graphical Signs Solid Waste Storage (Disposal) Site (GB 15562.2), etc.

48. Q: Should a hazardous waste operation license be obtained for the storage of solidified fly ash from a domestic waste incineration power plant (which meets the requirements for entering the domestic waste landfill site in the Standard for Pollution Control of Domestic Waste Landfill Site (GB16889))?
Answer: According to the National Catalogue of Hazardous Wastes, domestic waste incineration fly ash belongs to hazardous waste, code 772-002-18. According to the Appendix List of Exemption Management of Hazardous Wastes, the link of exemption management of domestic waste incineration fly ash is transportation and disposal. Therefore, the unit responsible for storing fly ash needs to apply for a hazardous waste operation license. According to 6.2 of the General Principles for the Identification of Hazardous Wastes, unless otherwise specified in relevant national regulations and standards, solid wastes generated after the disposal of hazardous wastes with toxic and hazardous characteristics are still hazardous wastes. Therefore, the domestic waste incineration fly ash storage unit after solidification and chelation shall obtain the hazardous waste operation license in accordance with the Measures for the Administration of Hazardous Waste Operation License.