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Refuse landfill liner utilizing waste incineration ash and construction method thereof

A technology of waste landfill and waste incineration ash, which is applied in the direction of infrastructure engineering, protection devices, buildings, etc., can solve problems affecting the safety of landfill, slip damage between layers, low bonding strength, etc., and achieve a good ecological environment Compatibility, resistance to deformation and slip damage, effect of reducing land damage

Pending Publication Date: 2018-01-09
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Technical problem: Existing landfills use a single or composite liner for anti-seepage. In addition to consuming a large amount of resources such as clay, bentonite, and sand, there are also low bonding strengths between different anti-seepage materials in the composite liner, and layers that are prone to occur The problem of sliding damage between landfills affects the safety of landfills

Method used

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  • Refuse landfill liner utilizing waste incineration ash and construction method thereof

Examples

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Effect test

Embodiment 1

[0033] In this example, a landfill liner and construction method using waste incineration ash is used in a valley-type landfill. The liner structure of the landfill is composed of compacted clay layer 2, Geomembrane 3, geonet 4, solidified fly ash layer 5, waste incineration bottom slag drainage adsorption layer 6, wherein the solidified fly ash layer 5 is made of fly ash particles cemented and solidified after municipal solid waste is incinerated for power generation. The material of the incineration bottom slag drainage adsorption layer 6 is the bottom slag after municipal solid waste is incinerated to generate electricity; the construction method steps of the landfill liner are as follows:

[0034]a. Lay a compacted clay layer 2 with a thickness of 0.8m on the surface of the foundation 1, and lay HDPE material, geomembrane 3 and geonet 4 with a thickness of 2 mm on the top surface of the compacted clay layer 2 from bottom to top;

[0035] b. Lay the fly ash mixture containi...

Embodiment 2

[0044] In this example, a landfill liner and construction method using waste incineration ash is used in a pothole-type landfill, and the landfill liner structure is sequentially composed of compacted clay layers 2 , geomembrane 3, geonet 4, solidified fly ash layer 5, waste incineration bottom slag drainage adsorption layer 6, wherein the material of solidified fly ash layer 5 is cemented and solidified by fly ash particles after municipal solid waste is incinerated for power generation, The material of the waste incineration bottom slag drainage adsorption layer 6 is the bottom slag after municipal solid waste is incinerated to generate electricity; the construction method steps of the landfill liner are as follows:

[0045] a. Lay a compacted clay layer 2 with a thickness of 1.5m on the surface of the foundation 1, and lay HDPE material, a geomembrane 3 and a geonet 4 with a thickness of 2 mm on the top surface of the compacted clay layer 2 from bottom to top;

[0046] b. L...

Embodiment 3

[0055] In this example, a landfill liner and construction method using waste incineration ash is used in a beach-type landfill. The liner structure of the landfill is composed of compacted clay layer 2, Geomembrane 3, geonet 4, microbial solidified fly ash layer 5, waste incineration bottom slag drainage adsorption layer 6, wherein the solidified fly ash layer 5 is made of fly ash particles cemented and solidified after municipal solid waste is incinerated for power generation. The material of the waste incineration bottom slag drainage adsorption layer 6 is the bottom slag after municipal solid waste is incinerated to generate electricity; the construction method steps of the landfill liner are as follows:

[0056] a. Lay a compacted clay layer 2 with a thickness of 1.2m on the surface of the foundation 1, and lay HDPE material, a geomembrane 3 and a geonet 4 with a thickness of 1 mm on the top surface of the compacted clay layer 2 from bottom to top;

[0057] b. Lay the fly ...

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Abstract

The invention discloses a refuse landfill liner utilizing waste incineration ash and a construction method thereof, and belongs to the technical field of solid waste treatment and utilization. The refuse landfill liner utilizing the waste incineration ash and the construction method thereof are used for solving the problems of safety of the waste landfill liner and disposal of the waste incineration ash. The structure of the refuse landfill liner is as follows: a compacted clay layer 2, a geomembrane 3, a geonet 4, a solidified fly ash layer 5 and a waste incineration bottom slag drainage adsorption layer 6 are sequentially arranged from bottom to top. The construction method of the refuse landfill liner comprises the following steps: a, laying the compacted clay layer 2 on the surface ofa foundation 1, and then sequentially laying the geomembrane 3 and the geonet 4; b, laying and compacting a bacteria-containing fly ash mixture; c, spraying a cementing liquid on the surface of the bacteria-containing fly ash mixture and letting the bacteria-containing fly ash mixture stand for 12 hours; d, repeating the step c until the cementing liquid cannot permeate the surface of the bacteria-containing fly ash mixture, and letting the bacteria-containing fly ash mixture stand for 24 hours; e, repeating the steps c and d for 4 to 6 times so as to complete the construction of the solidified fly ash layer 5; and f, laying and compacting the waste incineration bottom slag drainage layer 6 so as to complete construction of the refuse landfill liner.

Description

technical field [0001] The invention relates to a waste landfill liner and a construction method using waste incineration bottom slag and solidified fly ash as a structural layer, and belongs to the technical field of solid waste treatment and utilization. Background technique [0002] The development of urbanization has continuously increased the output of municipal solid waste. Landfill disposal is an important way of municipal solid waste disposal. Incineration power generation treatment is another important way of municipal solid waste treatment. After municipal solid waste is incinerated for power generation, a large amount of ash will be produced. These ash and slag include fly ash and bottom slag. The bottom slag of waste incineration belongs to general solid waste, which is usually sent to landfill or used as engineering filler for resource utilization . However, waste incineration fly ash contains a large amount of toxic heavy metals and organic matter, which is ...

Claims

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Application Information

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IPC IPC(8): E02D31/00
Inventor 邵光辉陈著刘鹏
Owner NANJING FORESTRY UNIV
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