What are the applied technologies for hazardous waste disposal? Let's learn about it.

　　1.Pre-treatment technology

　　Pretreatment of hazardous waste disposal generally uses physical, chemical and biological methods to change the physical and chemical properties of the waste for further treatment or to convert harmful substances into harmless Z-end products.

　　(1) Physical treatment

　　Hazardous waste disposal physical treatment is the use of various phase separation (such as gravity separation, flotation, electrowinning, etc.) and solidification techniques. Currently, solidification/stabilization technology is a commonly used physical method and is a necessary step for the safe landfilling of industrial hazardous waste. The polluting components of industrial hazardous waste are fixed or encapsulated with a solidifying substrate to reduce the leaching toxicity of the hazardous components in the waste, reduce the migration of the waste, and reduce the pollution of the surrounding environment. And now the new curing substrates used to improve the traditional curing methods to increase the volume of waste defects.

　　(2) Chemical treatment

　　Hazardous waste disposal chemical treatment is the use of chemical methods (such as redox treatment technology, oil-water separation technology, neutralization treatment technology) will be harmful substances into harmless Z-end products, or into a form suitable for further treatment and disposal. The purpose is to change the chemical properties of the treated material to reduce its harmfulness. As a pretreatment measure before the final disposal of hazardous waste. But the reaction process is complex, difficult to control, the cost is too high, it is difficult to large-scale treatment.

　　(3) Biological treatment

　　Hazardous waste disposal biological treatment is the use of microbial decomposition of degradable organic matter in solid waste, which can be accepted by the soil and water. Commonly used methods are activated sludge method, gasification pond method, oxidation pond method, composting method, etc. Compared with chemical treatment methods, biological treatment is usually economically cheaper, has less impact on the environment and is more widely used. However, the treatment process is time-consuming and the treatment efficiency is not stable enough.

　　2. Safe landfill

　　Hazardous waste disposal safe landfill is the pre-treatment (such as dewatering, neutralization, composting, solidification and stabilization) of waste to take engineering measures to control, reduce and eliminate chau hazardous waste hazards. Applicable to hazardous waste that can not recover its useful components and energy, including fly ash and residue from the incineration of hazardous waste, as well as fly ash from the incineration of domestic waste.

　　3. Incineration method

　　Hazardous waste disposal incineration is a comprehensive process of high-temperature decomposition and deep oxidation. Incineration can oxidation decomposition of combustible hazardous waste, so as to achieve the purpose of volume reduction, detoxification, energy recovery and by-products. Incineration is suitable for the disposal of hazardous wastes that cannot be recycled, reused or landfilled directly and safely under current economic and technological conditions. Incineration can be used to dispose of organic matter containing calorific value and recover its thermal energy, but also by melting the residue to stabilize heavy metal elements, is an important means of disposal to achieve reduction, harmlessness and resourcefulness at the same time. The incineration process of hazardous waste is complex. Due to the complex physical and chemical properties of hazardous waste, the same batch of hazardous waste composition, calorific value, shape and combustion state will vary greatly with time and combustion area, the composition of the exhaust gas and the nature of the slag produced after combustion will also change accordingly. Therefore, hazardous waste incineration equipment must be adaptable, flexible and able to automatically adjust the operating parameters to a certain extent.