Method for comprehensive treatment of household refuses and secondary pollution control

Abstract

The invention provides a method for comprehensive treatment of household refuses and secondary pollution control. The method comprises the following procedures of: 1) coarse separation of the household refuses; 2) pretreatment of the household refuses; 3) fine separation of the household refuses; 4) aerobic composting of the household refuses; 5) biological organic fertilizer preparation; 6) fabrication of refuse derived fuels; and 7) secondary pollution control. The method employs parallel dual-separation lines which are compact in arrangement; each functional unit device is rational in configuration, easy to operate and mechanically control; the sorting efficiency and the energy source recovery effect are obviously improved; and minimization, harmless treatment, recycling and energy conversion of the household refuses can be realized.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and relates to a comprehensive treatment method for domestic garbage, and more specifically to a method for green treatment of domestic garbage and secondary pollution control. Background technique [0002] With the development of social economy, the world's garbage output is increasing at a rate three times the average economic growth rate. The output of urban garbage in my country has accounted for more than 25% of the world's garbage output, and more than 70% of the 668 cities in the country have been garbage. Surrounded by garbage, a large amount of organic matter, heavy metals and pathogenic microorganisms are produced in the city surrounded by garbage, which seriously affects the quality of the environment and the health of residents. As early as the beginning of the 20th century, people discovered that waste resources can be used for heating, power gen...

AI Technical Summary

Problems solved by technology

After composting, the product has low fertilizer efficiency, many impurities, and heavy metals exceeding the standard, so it is difficult to be used as a fertilizer or soil conditioner, and the market is not good.

[0004] The incineration method can realize the reduction and harmlessness of garbage. However, due to the complex composition, high moisture content, and low calorific value of primary garbage in my country, direct incineration requires a large amount of auxiliary fuel, which requires a large investment and high operating costs.

Raw waste also contains waste such as plastics and batteries, which are directly burned to produce hazardous waste such as dioxins and fly ash, causing serious secondary pollution to the surrounding environment

[0005] Therefore, in order to realize the reduction, recycling, energy and harmlessness of domestic waste, effectively curb the secondary pollution of toxic and harmful substances such as dioxins, heavy metals, and fly ash, and improve the layout of mechanical sorting lines Due to the chaotic connection of unit equipment and generally low sorting efficiency, it is necessary to explore new methods for comprehensive treatment of domestic waste and secondary pollution control

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