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Concentrated solution resourceful treatment and refuse waterproof covering in-situ application process of refuse landfill

A landfill and concentrated solution technology, which is applied in the direction of landfill technology and solid waste removal, can solve the problems of large storage capacity loss, high covering cost, and intensified recharge of concentrated solution, achieving high cost performance and good quality. The effect of environmental friendliness

Active Publication Date: 2019-02-15
LIAONING HAITIANGE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although incineration, multi-effect evaporation and other processes can deal with pollutants fundamentally, their construction costs and operating costs are too high, and it is difficult to reuse the generated sludge and ash, which is not the best solution for future landfill leachate concentrates. method
[0003] my country's waste coverage is mainly covered by HDPE film and loess. Problems such as high covering cost, complicated engineering operations, large storage capacity loss, and waste of soil resources have gradually emerged. Even some sanitary landfills have not yet adopted effective operating methods to prevent rain Covering, a large amount of rainfall will seep into the landfill operation area, and the leachate data will increase sharply
In addition, due to policy, funding and other legacy issues, the stock of leachate in some landfills has exceeded the environmental risk warning line, and the recharge of concentrated liquid has also exacerbated the increase in this risk

Method used

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  • Concentrated solution resourceful treatment and refuse waterproof covering in-situ application process of refuse landfill
  • Concentrated solution resourceful treatment and refuse waterproof covering in-situ application process of refuse landfill

Examples

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Effect test

Embodiment 1

[0024] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0025] Example 1

[0026] Such as figure 2 As shown, in this embodiment, the waste landfill concentrated liquid resource treatment and the in-situ application process of waste waterproof covering include the following steps:

[0027] ①Put the cured base material into the dry material mixing system for mixing, and mix for 4 minutes at normal temperature and pressure to form a cured base material mixture;

[0028] ②Put the leachate concentrate produced by biochemical and membrane filtration processes together with the solidified base material mixture into the mixing system and stir evenly, and stir for 5 minutes at normal temperature and pressure to form a uniform mixture;

[0029] ③ Add curing agent to the homogeneous mixture to form a high-viscosity paste composite material, and use spraying equipment to spray the homogeneous mixture evenly on the surface of the la...

Embodiment 2

[0038] In this embodiment, the waste landfill concentrated liquid resource treatment and waste waterproof covering in-situ application process include the following steps:

[0039] ①Put the solidified base material into a dry material mixer for mixing, and mix for 30 minutes at normal temperature and pressure to form a solidified base material mixture; the dry material mixer is 20 rpm, 50m 3 .

[0040] ②Put the leachate into the JS500 concrete mixer together with the concentrated liquid produced by the biochemical and membrane filtration process together with the solidified base material mixture, and stir evenly at room temperature and pressure for 30 minutes to form a uniform mixture;

[0041] ③ Add curing agent to the uniform mixture, use the ECA-3000 hydraulic injection equipment produced by LSC to directly cover the landfill in situ, spray the uniform mixture evenly on the surface of the landfill operation area, and evenly mix the mixture Attached to the surface of the ga...

Embodiment 3

[0046] The solidified base material described in this example is composed of posi-shell and cement, the patented product of LSC Company of the United States, and the weight ratio of posi-shell and cement is 1:2.5.

[0047] The curing agent is composed of quicklime, a mixture of sodium bentonite and diatomaceous earth, a mixture of calcium dihydrogen phosphate and sodium dihydrogen phosphate in a ratio of 10:10:1 by weight, and the sodium bentonite The mixture with diatomite is composed of sodium bentonite and diatomite according to any weight ratio; the mixture of calcium dihydrogen phosphate and sodium dihydrogen phosphate is composed of calcium dihydrogen phosphate and sodium dihydrogen phosphate according to Composed of any ratio of parts by weight.

[0048] The parts by weight of the curing agent and the homogeneous mixture are 1:150.

[0049] The ratio of parts by weight of the solidified base material to the concentrated solution is 1:3.0.

[0050] The cured base mater...

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Abstract

The invention discloses a concentrated solution resourceful treatment and refuse waterproof covering in-situ application process of a refuse landfill. The concentrated solution resourceful treatment and refuse waterproof covering in-situ application process comprises the following steps: (1) a solidified base material is put into a dry material mixing system to be mixed, and a solidified base material mixture is formed; (2) a concentrated solution generated after leachate is treated through a biochemical and film filtering process and the solidified base material mixture are put into a mixingstirring system jointly to be evenly stirred, and an even mixture is formed; and (3) a refuse leachate concentrated solution and a solidifying agent are added into the even mixture, a high-viscosity pasty composite material is formed, and the even mixture is evenly sprayed on the surface of an operating area of the refuse landfill through spraying equipment to directly cover the refuse landfill insitu. The surface of the operating area of the sanitary landfill is covered in situ directly, after drying, a hard film with rainproofing, fireproofing, odor isolating and deodorizing functions is formed, thus most rainwater is obstructed from permeating, and generation of the refuse leachate is reduced.

Description

technical field [0001] The invention relates to waste water treatment and heap body covering technology of landfill, in particular to the process of resource recycling of concentrated liquid of landfill and in-situ application technology of waterproof covering of garbage. Background technique [0002] More than 80% of urban waste in my country is disposed of through sanitary landfill. Sanitary landfill is the most economical and common method of disposing of municipal solid waste. Due to the limited function of the loess covering commonly used at this stage to prevent rainwater, the production of landfill leachate increases sharply during the rainy season. Such as figure 1 As shown, at present, most landfills use reverse osmosis membranes to treat landfill leachate, but the leachate still produces a 20% to 40% concentrate after the membrane treatment process, and the concentrate contains a large amount of high-concentration organic matter and ammonia nitrogen. And salt, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B1/00
CPCB09B1/004Y02W30/30
Inventor 宋军孔德勇刘光聪
Owner LIAONING HAITIANGE ENVIRONMENTAL PROTECTION TECH
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