Garbage comprehensive treatment method suitable for villages and towns

Abstract

The invention discloses a garbage comprehensive treatment method suitable for villages and towns. The method comprises the following steps: village and town domestic garbage is sorted out into perishable components, combustible components, recycling components and inorganic components; the perishable components are subjected to anaerobic fermentation with crop residues, livestock and poultry manure and water according to the weight ratio of (0.8-1.2):(0.8-1.2):8 under a heat preservation effect of incineration waste heat to produce biogas; the combustible components are fully burnt under combustion supporting of the biogas, high temperature flue gas has heat recycled for maintaining the temperature of a biogas fermentation tank through a first heat exchanger and a second heat exchanger; biogas slurry, biogas residue, the biogas and the recycling components are subjected to resource utilization; the inorganic components and incineration ash are sanitarily landfilled. The method has the advantages that the domestic garbage combustible components are reduced by incineration; the incineration temperature is increased by combustion supporting of the biogas, and incineration flue gas secondary pollution is controlled; through recycling of the incineration waste heat, the temperature of the biogas fermentation tank is maintained at 35-55 DEG C, and the biogas fermentation efficiency and yield are improved.

Description

technical field [0001] The invention relates to a comprehensive garbage treatment method suitable for villages and towns. Background technique [0002] Village and town garbage mainly includes three categories: livestock and poultry manure, household garbage and crop residues. According to statistics, the annual output of village and town household garbage in the country reaches 350 million tons, and the annual output of livestock and poultry breeding waste exceeds 2 billion tons. At present, domestic garbage in villages and towns is mainly disposed of by direct dumping or open-air landfill, and the phenomenon of garbage encroaching on land and farmland and surrounding villages by garbage is serious. However, crop residues and plastics are mostly burned directly in the open air, and the smoke and other substances pollute the environment extremely seriously. Therefore, the villages and towns in our country are generally dirty, chaotic and poor, which seriously affects the pr...

AI Technical Summary

Problems solved by technology

[0004] Therefore, at present, there is still a lack of comprehensive treatment and disposal methods that are suitable for the environment of villages and towns and meet the characteristics of various types and complex properties of village and town garbage.