Harmless treatment process of domestic garbage in villages and towns

Abstract

A harmless treatment technology for town household garbage comprises the following specific steps that 1, the town household garbage is collected; 2, the collected town household garbage is subjected to coarse breaking; 3, the materials subjected to coarse breaking are subjected to primary screening, oversize products obtained after primary screening are subjected to gravity separation, and undersize products obtained after screening are subjected to primary aerobic fermentation; 4, the materials obtained after primary aerobic fermentation are subjected to fine breaking; and 5, the materials subjected to fine breaking are subjected to secondary screening, oversize products obtained after secondary screening are subjected to gravity separation, undersize products obtained after secondary screening are subjected to secondary aerobic fermentation and decomposition, namely, a curing procedure, the water content of the cured materials is reduced to 30% or below, and nutrient soil is produced. The technology is advanced, scientific and environment-friendly, the town household garbage is turned into wealth, the nutrient soil with high market value is produced, reducing, recycling and harmless treatment of the town household garbage is achieved, and town pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment, and in particular relates to a process for the harmless treatment of domestic garbage in villages and towns. Background technique [0002] Household garbage refers to the solid waste generated in daily life or in the activities that provide services for daily life, as well as the solid waste that is regarded as household garbage according to laws and administrative regulations. Domestic waste can generally be divided into four categories: recyclable waste, kitchen waste, hazardous waste and other waste. Commonly used garbage disposal methods mainly include comprehensive utilization, sanitary landfill, incineration and composting. Implementing classified recycling management of garbage can effectively reduce pollution and increase the reuse of recyclable garbage. According to the "Law of the People's Republic of China on the Environmental Prevention and Control of Solid Waste Pollutant...

AI Technical Summary

Problems solved by technology

[0007] 2. Kitchen waste

[0008] 3. Hazardous waste

[0009] 4. Other garbage

[0013] 3. Leftovers: A large number of mosquitoes and flies are bred; bacteria in the garbage are multiplied, and toxic gases and methane are produced, causing garbage explosions

[0014] 4. Paints and pigments: paints containing organic solvents can cause headaches, allergies, coma or cancer; they are dangerous flammable products; pigments contain heavy metals, which are harmful to health

Due to the high water content, low calorific value and incomplete combustion of village and town garbage, no flue gas purification measures were taken during the incineration process, and a large amount of toxic and harmful pollutants such as fly ash, dioxin, carbon monoxide, and residues generated during the incineration process were discharged randomly, causing serious secondary pollution

Domestic waste in villages and towns is mainly collected in a mixed manner. Perishable organic waste with a high moisture content is directly mixed with other waste, which not only increases the safety hazards of landfills, reduces the calorific value of waste incineration, but also seriously wastes resources, especially perishable waste. The resource utilization of organic waste has been seriously neglected

On the other hand, due to the lack of understanding and management of domestic waste treatment, the domestic waste treatment and disposal technology is extensive and single, resulting in serious secondary pollution, poor reduction effect, low resource utilization rate, and the waste generated by villages and towns. Environmental problems are becoming increasingly prominent

At this stage, domestic research on the recycling of domestic waste in villages and towns is relatively backward, and there is a lack of mature, economical and effective comprehensive treatment technologies and means

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