Small and medium-sized city household garbage sorting treatment system and method

Abstract

The invention discloses a small and medium-sized city household garbage sorting treatment system. The sorting treatment system comprises a household garbage sorting system and a household garbage treatment system; the household garbage treatment system is disposed on the downstream of the household garbage sorting system; the household garbage treatment system comprises an organic matter treatmentsystem, a sewage and waste treatment system and a non-organic regenerant treatment system; and the organic matter treatment system is a pyrohydrolysis-anaerobic fermentation combined system. The small and medium-sized city household garbage sorting treatment system is high in sorting efficiency, low in household garbage treatment cost, high in household garbage recycling ratio, free of secondarypollution and environmentally friendly, the biodegradability of organic wastes is effectively improved, the fertilizing effect and utilization value of fermented biogas residues are improved, and quantity reduction, harmless effect and reclamation of household garbage treatment are achieved.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a system and method for sorting and treating domestic garbage in small and medium-sized cities. Background technique [0002] With the growth of China's population, the acceleration of urbanization, the development of economy and the continuous improvement of people's living standards, the amount of municipal solid waste is increasing day by day. At present, the treatment of domestic waste in small and medium cities can usually be divided into landfill, incineration and composting. However, the above methods have the following shortcomings: [0003] Garbage landfill does not realize the recycling of waste, occupies a large amount of land and has great potential hazards; while the use of domestic waste incineration for power generation will cause adverse effects on the surrounding environment due to the discharge of waste gas, wastewater and solid waste during the incine...

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Problems solved by technology

[0003] Garbage landfill does not realize the recycling of waste, occupies a large amount of land and has great potential hazards; while the use of domestic waste incineration for power generation will cause adverse effects on the surrounding environment due to the discharge of waste gas, wastewater and solid waste during the incineration process ; The acid gas, heavy metals and burning fly ash produced during the incineration process of domestic waste, and even the leachate produced by waste treatment, etc., if not handled properly, will cause secondary pollution to the surrounding environment; waste composting is often mixed composting, but because The composition of garbage is complex, and the degradation rate of inorganic substances in domestic garbage is low, so the quality of compost is not ideal

[0004] At present, some domestic garbage comprehensive sorting technologies have been applied to the comprehensive treatment of garbage. However, the garbage components are complex and the sorting is difficult. Relying only on conventional sorting techniques results in low sorting efficiency, incomplete sorting, and resource utilization. Poor, and will cause secondary pollution problems

In addition, the combined application of various sorting technologies is often not stable, and it is difficult to truly sort out the recyclables from domestic waste, and the sorting effect and resource reuse are not ideal

[0005] At the same time, the current treatment technology for organic matter sorted out after the comprehensive treatment of domestic waste is single, and most of them are anaerobic fermentation. However, the organic matter is complex, including kitchen waste, melon and fruit residues, snack residues, etc., and the pretreatment methods are basically crushed. Due to the high moisture content and cellulose content of organic matter, the fermentation is incomplete, insufficient, takes a long time, and the biogas production rate is low. The generated biogas residue cannot be used directly, resulting in low utilization value of the fermented product

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