Treatment method for stock construction waste landfill and stacking point

Abstract

The invention provides a treatment method for a stock construction waste landfill and stacking point. The treatment method comprises the following steps that pollution isolation is carried out on an area where the stock construction waste landfill and stacking point is located, and stabilization treatment is carried out on waste in the area where pollution isolation is carried out to obtain steady-state waste after specific pollutants and organic waste are stabilized; the steady-state waste is excavated, and resourceful treatment and innocent treatment are conducted on the excavated steady-state waste; and backfilling and trimming are carried out on the excavated area. The specific pollutants in construction waste and the organic waste in household waste are subjected to specific stable treatment operation, so that harm of the specific pollutants and the organic waste to the environment is reduced, orderly screening of the waste in the area where the construction waste and the organic waste are located is achieved, later resource reutilization is facilitated, restoration of the area after the waste is excavated is guaranteed, and the ecological function of a site is improved.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a treatment method for stock construction waste landfill storage points. Background technique [0002] For a long time, the resource utilization and disposal of construction waste in most parts of my country has been insufficient, resulting in the vast majority of construction waste being transported to the suburbs for open storage or simple landfill without any treatment. As of 2018, my country's stock of construction waste has reached more than 20 billion tons. There are many ecological environmental hazards and safety hazards in untreated construction waste dumps. [0003] (1) Harmful substances in construction waste (mainly including polycyclic aromatic hydrocarbons released from paints, coatings and asphalt, etc.) seep into the soil through landfill leachate, resulting in a series of physical, chemical and biological reactions, such as filtration , Adsorption...

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Problems solved by technology

[0005] (3) During the stacking process of construction waste, under the action of temperature and moisture, some organic substances will decompose and produce harmful gases, which will pollute the atmosphere when discharged into the air; bacteria and dust in the waste will be scattered by the wind, causing damage to Air pollution; a small amount of combustible construction waste will produce toxic carcinogens during the incineration process, causing secondary pollution to the air

[0006] (4) The accumulation of construction waste occupies urban space, and the temporary storage site lacks proper protective measures. Under the influence of external factors, construction waste piles are prone to landslide accidents, which will block roads and even rush to other buildings; Reduced surface drainage and flood discharge capacity

Borrowing domestic waste disposal technology will cause deviations in process selection and cost estimation

[0010] 3) Due to historical reasons, most of the existing construction waste landfill sites are mixed landfills of various wastes. The existing technology does not distinguish wastes with huge differences in physical and chemical properties, and uniformly adopts a single process for disposal, and there are inconsistencies in process design. Reasonable and resourceful utilization of poor product quality, difficulty in consuming sorted sundries, etc.

[0011] 4) The treatment of stock construction waste landfill sites is also reflected in the restoration of the original polluted site to make it meet a certain land use standard, which is rarely involved in existing technologies

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