A biological drying-based domestic waste treatment method

Abstract

The invention provides a bio-drying-based domestic refuse treatment method. The method comprises the following steps: (1), pre-treatment: feeding domestic refuses into a negative-pressure receiving room to break bags and manually select; performing innocent treatment on selected harmful refuses which have potential pollution threats to the soil and the underground water, and crushing selected large-size refuses in a large-size refuse crusher, wherein the crushed large-size refuses are treated in a step (3), residual domestic refuses are treated in a step (2), and the air change rate of the negative-pressure receiving room is five to seven times per hour; (2), bio-drying: feeding the residual domestic refuses treated in the step (1) into a bio-drying storehouse, stacking to form a refuse dump body, and covering the refuse dump body with a selective semi-permeable membrane; (3), post-treatment: sequentially performing mechanical crushing, drum screen screening, magnetic separation, near-infrared separation and air separation on the dried products obtained in the step (2) and large-sized refuses crushed in the step (1); (4), tail end treatment: respectively recovering and utilizing according to property difference of products selected according to the step (3).

Description

technical field [0001] The invention belongs to the field of garbage treatment, in particular to a biological drying-based domestic garbage treatment method. Background technique [0002] Due to residents' living habits and dietary characteristics, my country's municipal solid waste has the characteristics of high moisture content, high organic matter content and low calorific value. The long-term mixed collection of garbage collection and transportation also leads to the extremely complex composition of the garbage entering the treatment facilities. The above-mentioned characteristics of MSW in my country lead to a series of technical problems in the process of waste treatment: (1) high moisture and high viscosity lead to poor adaptability of mechanical sorting technology; (2) low quality of waste compost; (3) high content of organic matter As a result, the landfill leachate load is high and the treatment is difficult; (4) The high water content and high organic matter cont...

AI Technical Summary

Problems solved by technology

The long-term mixed collection of garbage collection and transportation also leads to the extremely complex composition of the garbage entering the treatment facilities

The above-mentioned characteristics of MSW in my country lead to a series of technical problems in the process of waste treatment: (1) high moisture and high viscosity lead to poor adaptability of mechanical sorting technology; (2) low quality of waste compost; (3) high content of organic matter As a result, the landfill leachate load is high and the treatment is difficult; (4) The high water content and high organic matter content also lead to an increase in the design capacity of waste treatment facilities; (5) The high water content and low calorific value lead to high cost and low efficiency of waste incineration inferior

Incineration will cause many adverse effects on the environment, and it will not be possible to realize the recycling of waste resources and energy

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