Method for landfill coverage by using deep-mineralized stale garbage compounding

Abstract

The invention belongs to the technical field of garbage treatment, and in particular, relates to a method for landfill coverage by using deep-mineralized stale garbage compounding. Deep-mineralized stale garbage is used as fillers for day coverage and middle coverage of a landfill and closure repair coverage; the day coverage fillers are protecting layers, adjusting layers and stabilizing layers in sequence from top to bottom; the middle coverage fillers are anti-seepage layers and function adjusting layers paved in sequence from top to bottom; and the closure repair coverage fillers are vegetation layers, drainage layers, anti-seepage layers and exhaust layers in sequence from top to bottom. The physical and microorganism activity of deep-mineralized stale garbage humus and the hydraulicproperty are fully exerted to accelerate the biodegradation and stabilization progress of the landfill, so that the internal biodegradation environment of the landfill is effectively improved, and meanwhile, the ecological repair function of the landfill is improved. The deep-mineralized stale garbage humus can use local materials, so that the reduction and the recycling of solid wastes in the landfill are achieved, and the landfill operating cost can be saved.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a method for compounding deep mineralized stale garbage for landfill coverage. Background technique [0002] At present, sanitary landfill is still the main treatment method for domestic waste in my country. Although the number of waste incineration plants and the proportion of waste incineration in my country have grown rapidly in recent years. But in the future, landfill will still be the main way of domestic waste disposal in our country. The landfill process will involve daily coverage, intermediate coverage and closure restoration coverage. Relevant national technical standards require that the paving, compaction and covering of the garbage should be completed within 24 hours after the garbage enters the site. The thickness of the covering layer should be determined according to the covering material, and the thickness of the soil covering layer should be 20-25cm...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, sandy soil and clay are mainly used as covering materials for daily covering, and there are many adverse effects: (1) Since sandy soil and clay are inert materials, they will not degrade with the passage of time, and the landfill (2) Since the sandy soil and clay are purchased from different places and transported to the landfill site, it is easy to cause economic waste such as operating costs; (3) To prevent the surface of the daily covering material from collecting water The daily coverage requires good permeability to the covering material, while the clay has a low permeability coefficient, which is not conducive to the infiltration of leachate during recharging. In addition, a stagnant layer of leachate is easy to form on the clay layer, which will increase The large pressure acting on the anti-seepage layer may also cause problems such as uneven settlement and landfill slope collapse.

At present, the materials of the intermediate covering layer are mainly clay and synthetic geotextile membrane, which have the following disadvantages: (1) clay has a large volumetric occupancy rate, which easily causes pressure on the storage capacity of the landfill; (2) the synthetic geotextile membrane and clay are purchased in different places And transported to the landfill site, it is easy to cause economic waste such as operating costs; the use of synthetic geotextile membranes requires higher construction technology and greater economic costs

In the prior art, the function of the filling for the closure and restoration of the landfill is single: the filling used in the exhaust layer is only porous and helps the function of gas inversion, the drainage layer only has water conductivity, and the function of the vegetation layer is mainly to utilize Vegetative growth provided by the enclosure cover provides a substrate

The overall ecological restoration function of the landfill has not been strengthened

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