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Landfill method capable of achieving stabilizing and Hg-contained soil repairing

A soil and mineralized garbage technology, applied in the field of environmental engineering, can solve the problems of high cost, reduced alkaline curing effect, unstable curing effect, etc., and achieve the effect of stabilization

Inactive Publication Date: 2016-09-28
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent No. 201510056406.6 introduces a curing method for Hg-containing soil, but this method uses a large amount of materials, and the cost is high. On the other hand, the curing effect is unstable. For example, the added calcium oxide is prone to carbonation under natural conditions. Reduces the effect of alkaline curing

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  • Landfill method capable of achieving stabilizing and Hg-contained soil repairing

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example 1

[0015] 1. Lay an anti-seepage layer at the bottom, lay a perforated collection pipe on it for leachate collection, lay gravel on it for diversion of leachate, lay a layer of mineralized garbage on the gravel, with a height of 200cm, and lay 4 units on it layer; multiple leachate recharge conduits are inserted on the surface of the uppermost unit layer, on the one hand to remove landfill gas, and on the other hand to refill leachate;

[0016] 2. The laying method of the unit layer is as follows: the bottom is composed of a mixed layer composed of organic waste, sludge and gypsum, the mixing ratio is gypsum: sludge: organic waste = 2:5:15, and the laying height is 100cm; For the Hg soil layer, the laying height is 200cm; the mineralized garbage layer is laid on the upper part of the Hg-containing soil layer, and the laying height is 100cm; another layer is laid above the unit layer, and so on, laid one by one;

[0017] 3. After the collected leachate is introduced into the leach...

example 2

[0020] 1. Lay an anti-seepage layer at the bottom, lay a perforated collection pipe on it for leachate collection, lay gravel on it for diversion of leachate, lay a layer of mineralized garbage on the gravel, with a height of 150cm, and lay 7 units on it layer; multiple leachate recharge conduits are inserted on the surface of the uppermost unit layer, on the one hand to remove landfill gas, and on the other hand to refill leachate;

[0021] 2. The laying method of the unit layer is as follows: the bottom is composed of a mixed layer composed of organic waste, sludge and gypsum, the mixing ratio is gypsum: sludge: organic waste = 3:8:30, and the laying height is 100cm; For the Hg soil layer, the laying height is 200cm; the mineralized garbage layer is laid on the upper part of the Hg-containing soil layer, and the laying height is 100cm; another layer is laid above the unit layer, and so on, laid one by one;

[0022] 3. After the collected leachate is introduced into the leach...

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Abstract

The invention provides a method for utilizing a landfill technology for stabilizing household garbage while repairing Hg-contained soil. According to the method, the Hg-contained soil, the household garbage, mineralized garbage and a certain number of materials are subject to common landfill, and through the certain landfill manner and the simple operation means, organic matter in the household garbage can be rapidly stabilized while the Hg-contained soil is repaired; and landfill leachate is treated with low cost.

Description

technical field [0001] The invention relates to a landfill method capable of stabilizing Hg-containing soil. The Hg-containing soil and domestic garbage are mixed for landfill, and certain conditions are controlled to realize the stabilization of the two, which belongs to the technical field of environmental engineering. Background technique [0002] In recent years, soil lead and cadmium pollution incidents have occurred frequently in my country, so the remediation of lead-contaminated soil is facing severe challenges. [0003] At present, the control of lead and cadmium polluted soil is mainly divided into two directions: one is to transfer lead and lead from the soil to the leachate or plants through chemical leaching, biological leaching or plant extraction to reduce soil lead However, because Hg is insoluble in water, this method is difficult to promote; the second is through fixation / stabilization, etc., to reduce the toxicity of lead in the soil by desorbing with the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09B3/00
CPCB09C1/08B09B3/20
Inventor 张大磊李公伟赵昱皓
Owner QINGDAO TECHNOLOGICAL UNIVERSITY