Domestic waste comprehensive treatment technology based on the pre-processing

Abstract

A technology based on the household garbage of the biology pretreatment, belongs to the environmental protection technical field, which is characterized by including a garbage manual presorting, the biology pretreatment, the garbage compost and the refuse burning technology. After the household garbage is sorted manually, the garbage is divided into four kinds: the tile stone component is used for roadbuilding or filling the pit, the recoverable component is reclaimed to use; the hazardous waste is sent to the hazardous waste disposal work for centralized disposition; after the residual garbage processes the biology pretreatment, and is sorted into the biodegradable component and the combustible constituent by the machine, while the biodegradable component processes the land use after composting, and the combustible constituent is fired for process. The effect and the benefit of the invention are to make the domestic garbage for a rational utilization after sorting, without processing the percolate and setting the sanitary landfill field. The invention realizes the 'innocuity, decrement, resource', reduces the cost of investment and the operating cost, which accords with the situation of China, and a reliable and effective household garbage comprehensive approach.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a process for comprehensively treating domestic garbage based on biological pretreatment. According to the characteristics of high content of biodegradable components, high water content and low calorific value of urban domestic waste in my country, the domestic waste is effectively classified and treated separately according to different types of waste. Background technique [0002] At present, domestic and foreign domestic waste treatment technologies are all aimed at harmlessness, reduction, and recycling. The most commonly used treatment methods are landfill, incineration and composting. They have different application scopes and conditions. From recycling From an economic point of view, only by managing the whole process of garbage generation, collection, transportation and treatment can we truly achieve the harmlessness, reduction and recycling of garbage. ...

AI Technical Summary

Problems solved by technology

However, at present, the content of biodegradable components and large water content of urban waste in my country is high, and the landfill treatment method is directly used, which has high transportation costs and occupies a large area of ​​land. A large amount of leachate will be generated during the landfill process, and it is difficult to treat the leachate; composting The method can mature and stabilize perishable organic matter through aerobic or anaerobic composting, kill harmful bacteria and insect eggs, so as to achieve harmlessness, and can be made into organic nutrient soil, but composting is only applicable For organic waste such as biodegradable kitchen waste, domestic waste is generally collected in a mixed manner, and the direct use of composting treatment technology results in high content of impurities in the compost and low fertilizer efficiency, making it unusable; incineration is a high-temperature treatment technology for waste. The advantage is a high degree of reduction and harmlessness, the heat generated by incineration can be used for power generation and heating, and the residue can be directly landfilled, which can greatly reduce the volume and weight of waste. It is widely used in cities, but the incineration method has higher requirements on the calorific value of garbage, and the status of most urban garbage in my country is not suitable for direct incineration.

Moreover, waste with high moisture content and low calorific value is likely to produce pollutants such as dioxin during incineration, and the operating cost is high

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