Technique for treating municipal solid waste

Abstract

The invention discloses a treatment technique for municipal solid waste by employing sanitary landfill treatment as a main means. The technique comprises the following steps: firstly, carrying out pretreatment (landfill) on sorted waste; carrying out landfill treatment for 5-6 years, and transforming the waste into mineralized refuse; selecting a sieve hole with a reasonable size, carrying out sieving treatment on the transformed mineralized refuse, and separating combustible matters with a high calorific value, inorganic matters and fine-granular organic muck; finally conveying the combustible matters with the high calorific value to a waste incineration plant for treating; carrying out intensive treatment on the fine-granular organic muck and then selling as a compost product; and backfilling the inorganic matters such as masonry to a landfill yard. According to the technique, the technical defects in a single treatment mode are solved; the service life period of a sanitary landfill can be greatly prolonged; the capital investment is relatively small; and the problem of treatment of the municipal waste in China can be relatively well solved.

Description

technical field [0001] This technology belongs to the field of environmental protection technology Background technique [0002] With the rapid economic growth and the continuous acceleration of the urbanization process, the amount of urban waste continues to increase. If the urban solid waste is stored or disposed of improperly in the open air, the harmful components in it can be directly or indirectly introduced into the human body through the atmosphere, soil, groundwater, etc., infecting diseases, causing potential, sudden and long-term harm to human beings; at the same time, solid waste Pollution to water, soil and air, encroachment on land, and impact on environmental sanitation. [0003] Municipal solid waste treatment methods at home and abroad mainly include sanitary landfill, incineration, composting and so on. Among the domestic municipal solid waste treatment technologies, sanitary landfill is currently the main treatment method, accounting for 81.8% of the col...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the urban garbage in our country adopts the landfill method, but due to its large area, with the expansion of the city scale in our country and the reduction of available land, this method has been restricted in the eastern coastal and economically developed cities of our country.

In addition, the design, construction and operation of most landfills still have problems such as relatively backward design concepts, low technological level, low landfill utilization rate, lack of effective foundation and slope anti-seepage measures, and most landfills The landfill gas in the site is still in a state of unorganized emission, which not only causes the greenhouse effect, but also leads to unsafe fire protection, and also produces stench

The aerobic landfill with forced ventilation has not yet entered the actual operation stage at home and abroad due to the complexity of the process equipment and high operating costs.