Composting treatment

　　The domestic garbage is piled up in piles, stored at 70 ° C for storage and fermentation, and the organic matter is decomposed into inorganic nutrients by the ability of microorganisms to be decomposed in the garbage. After composting, the domestic garbage becomes a hygienic, tasteless humus. It not only solves the way out of garbage, but also achieves the goal of re-recycling. However, the amount of compost is large and the nutrient content is low. The long-term use is likely to cause soil compaction and groundwater quality deterioration. Therefore, the scale of composting is not too large.
　　Regardless of landfill, incineration or composting of municipal solid waste, pretreatment must be carried out. The pre-treatment program first requires residents to pack the domestic wastes into recyclable substances, organic substances and inorganic substances, and then the garbage disposal companies collect and transport them according to the garbage classification, sorting and utilization.
　　Waste pyrolysis treatment: the organic matter is decomposed by heating under anaerobic or anoxic conditions. The pyrolysis products are combustible gases, combustion oils, carbon black, and the like. International development and application of pyrolysis technology can be divided into two categories: one is represented by the United States, with the purpose of recycling storage energy (combustion gas, oil, carbon black); the other is represented by Japan, with no The purpose of the development of public hazard systems is to reduce the secondary pollution caused by incineration and the amount of landfill waste.
　　At present, the international treatment of waste is developed from a single treatment to a comprehensive treatment, such as composting combined with incineration and landfill.
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