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Harmless treatment method for solid waste stacking site

A solid waste, harmless treatment technology, applied in the direction of solid waste removal, landfill technology, protection devices, etc., can solve the problem of heavy metal content and chemical agents in solid waste, aggravated soil erosion, land destruction, Issues such as natural landscape and vegetation

Inactive Publication Date: 2017-04-05
湖南省园林建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no mandatory classification of garbage in China, and there is no habit of garbage classification, solid waste, especially solid waste from mines, is inevitably mixed with heavy metal residues and toxic chemical waste, piled up on the surface of the land, destroying the surface of the land, Natural landscape and vegetation, soil erosion intensifies, causing serious damage to the ecological environment, and the heavy metal content and chemical agents in solid waste are high, causing serious pollution to surface water and groundwater

Method used

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  • Harmless treatment method for solid waste stacking site
  • Harmless treatment method for solid waste stacking site

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Depend on figure 1 It can be seen that a method for ecological restoration of a solid waste dump site comprises the following steps:

[0017] (1) Mix the solid waste in the storage yard with fixative and water evenly, and roll and compact it;

[0018] ⑵In the process of compaction, make the central position of the stacking yard the high point, and gradually incline towards the periphery with a slope of 5°<slope<45°;

[0019] (3) Place an anti-seepage layer on the compacted solid waste, and pile clay with a thickness of 10cm to 20cm on the anti-seepage layer for compaction;

[0020] ⑷Pile a sand layer with a thickness of 1cm to 3cm on the compacted clay and compact it.

[0021] The anti-seepage layer of the present invention is non-woven fabric or waterproof blanket.

[0022] In this embodiment, firstly, the solid waste 1 on the storage yard is uniformly mixed with fixative and water, and then rolled and compacted by mechanization. The slope of ° gradually inclines t...

Embodiment 2

[0029] Depend on figure 2 It can be seen that, in order to prevent the anti-seepage layer 3 from moving on the solid waste 1, in step (3) of the present invention, firstly, the clay 2 with a thickness of 10 cm to 20 cm is stacked on the compacted solid waste 1 and compacted; Place the anti-seepage layer 3, and then pile up the clay 2 with a thickness of 10cm to 20cm on the anti-seepage layer 3, and compact it.

[0030] The anti-seepage layer 3 of this embodiment adopts a waterproof blanket, and the waterproof blanket is a bentonite waterproof blanket, which is made of graded natural sodium bentonite particles and corresponding admixtures mixed as raw materials. A blanket-like waterproofing membrane fixed between geotextiles and plastic woven fabrics. Bentonite waterproof blanket not only has all the characteristics of geotechnical materials, but also has excellent waterproof (seepage) performance.

[0031] In this way, the anti-seepage layer 3 is difficult to move on the so...

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Abstract

The invention discloses a harmless treatment method for a solid waste stacking site comprising heavy metal residues and toxic chemical wastes. The method is characterized by comprising the following steps of: (1) uniformly mixing the solid wastes in the stacking field with a fixing agent and water, and grinding and compacting the mixture; (2) in the compacting process, gradually inclining toward the periphery at a gradient which is greater than 5 degrees but less than 45 degrees by taking the central position of the stacking site as a high point; (3) putting an impervious barrier on the compacted solid wastes, stacking clay which is 10-20cm thick and compacting the same; and (4) sacking a sand layer which is 1-3cm thick on the compacted clay and compacting the same. The solid wastes are leveled according to a design of a high middle part and a low peripheral region and are closed by embedding a non-woven fabric or a waterproof blanket in clay, so that rainwater is effectively prevented from permeating into the solid wastes, and therefore, pollutants are prevented from being dissolved in rainwater to leak and diffuse outward; plants and trees can be planted on culture soil on the top, so that a purpose of biologically restoring the solid waste stacking site is achieved.

Description

technical field [0001] The present invention relates to a treatment method of waste, in particular to a harmless treatment method for a solid waste dump, in particular to a harmless treatment method for a solid waste dump containing heavy metal residues and toxic chemical waste. treatment method. Background technique [0002] At present, due to industrialization and urbanization, many solid wastes such as industrial waste and domestic waste are piled up around factories, mines or cities. Since there is no mandatory classification of garbage in China, and there is no habit of garbage classification, solid waste, especially solid waste from mines, is inevitably mixed with heavy metal residues and toxic chemical waste, piled up on the surface of the land, destroying the surface of the land, Natural landscape and vegetation, water and soil erosion intensified, causing serious damage to the ecological environment, and the heavy metal content and chemical agents in the solid wast...

Claims

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Application Information

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IPC IPC(8): B09B1/00E02D31/00
CPCB09B1/004E02D31/006Y02W30/30
Inventor 张卫王勇坚娄志平谢施施
Owner 湖南省园林建设有限公司
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