Explain the method of waste disposal you drop at home
Answers
Answer:
Recycling
Recycling refers to both the direct reuse of used products (e.g. used clothing and functioning parts removed from used vehicles) and material recycling, that is the recovery of raw materials from waste (e.g. production of new glass from fragments, the melting of scrap iron and the production of recycled building materials from construction waste). Downcycling refers to the transformation of waste to materials of lower quality than the initially used material.
Recycling
Incineration
Combustible waste from households and waste wood that is not suitable for recycling undergo thermal treatment in waste incineration plants or waste wood furnaces. The heat released in the process is used to generate electricity and heat buildings. Waste with a high calorific value and low level of pollutant contamination can be used in industrial plants, e.g. cement plants, as an alternative to fossil fuels. Waste that is contaminated with organic pollutants undergoes separate thermal treatment (e.g. in hazardous waste incineration plants). Incinerators must have a flue gas treatment system. The requirements for flue gas treatment and the incineration system are based on the nature of the waste.
Specialised waste disposal companies treat the waste in accordance with the requirements of the incineration plant. This guarantees that the fuel will be of a high quality and reduces the accident risk. The companies ensure, for example, that no undesirable reactions occur when liquids are mixed. Waste materials that are used as substitute fuels in cement plants must be crushed in advance and set at a constant calorific value.
Cement plants
Other thermal treatment plants
Chemical-physical and biological treatment
The objective of both chemical-physical and biological treatment is to enable the removal of pollutants from waste or its safe landfilling. Wastewater and polluted excavated material are typical of the types of waste that are managed in this way. Following chemical-physical treatment, the pollutants can be disposed of in concentrated form in facilities suitable for this purpose.
Chemical-physical and biological treatment
Landfills
Residues from waste incineration or waste that is not suitable for material recycling or thermal treatment are deposited in landfills that are compliant with the legal requirements. If the waste does not fulfil the requirements for landfilling, it must be pre-treated.
Landfills