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Household garbage landfill sub-base layer material and preparation method thereof

A technology of domestic waste and grass-roots materials, applied in the direction of biochemical equipment and methods, methods based on microorganisms, chemical instruments and methods, etc., can solve problems such as leachate leakage, and achieve the effect of reducing the possibility of secondary pollution

Active Publication Date: 2021-05-04
肇庆市武大环境技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the leachate leakage problem existing in landfills at present, the present invention provides a subbase material for a domestic waste landfill and a preparation method thereof. When the subbase material of the present invention cracks due to unknown factors, spores Bacillus will be activated when it comes into contact with water, producing limestone to bond cracks, preventing further leakage of leachate and reducing the possibility of secondary pollution to the environment caused by leachate leakage in domestic waste landfills

Method used

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  • Household garbage landfill sub-base layer material and preparation method thereof
  • Household garbage landfill sub-base layer material and preparation method thereof
  • Household garbage landfill sub-base layer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation of embodiment 1 domestic waste landfill subbase course material

[0023] 1) Bacillus pseudofirmus bacteria suspension is prepared, which is a combination of Bacillus subtilis, Bacillus colioids and Bacillus cereus according to the number of bacteria 1:1:1;

[0024] 2) After centrifuging the suspension in step 1), the bacteria sludge obtained is diluted with water;

[0025] 3) mixing the mixed bacteria suspension obtained in step 2) with a sodium alginate solution, and then mixing with a calcium chloride solution to generate a cross-linking reaction;

[0026] 4) Mix the product in step 3) with the curing agent, (the mass ratio of the product in step 3) to the curing agent cement is 1:15), adjust the pH value to 7.5, stir until evenly distributed; after natural dehydration, molding and curing Instantly.

[0027] The mass concentration of sodium alginate is 5.2%; the mass concentration of calcium chloride solution is 4.7%; the volume ratio of sodium algin...

Embodiment 2

[0028] Example 2 Preparation of base course material for domestic waste landfill

[0029] 1) Bacillus pseudofirmus bacteria suspension is prepared, which is a combination of Bacillus subtilis, Bacillus colioids and Bacillus cereus according to the number of bacteria 1:1:1;

[0030] 2) After centrifuging the suspension in step 1), the bacteria sludge obtained is diluted with water;

[0031] 3) mixing the mixed bacteria suspension obtained in step 2) with a sodium alginate solution, and then mixing with a calcium chloride solution to generate a cross-linking reaction;

[0032] 4) Mix the product in step 3) with the curing agent (the mass ratio of the product in step 3) to the curing agent Augt-set is 1:10), adjust the pH value to 6.5, and stir until evenly distributed; after natural dehydration, molding , that is maintenance.

[0033] The mass concentration of sodium alginate is 1.0%; the mass concentration of calcium chloride solution is 1.5%; the volume ratio of sodium algin...

Embodiment 3

[0034] Example 3 Preparation of base course material for domestic waste landfill

[0035] 1) Bacillus pseudofirmus bacteria suspension is prepared, which is a combination of Bacillus subtilis, Bacillus colioids and Bacillus cereus according to the number of bacteria 1:1:1;

[0036] 2) After centrifuging the suspension in step 1), the bacteria sludge obtained is diluted with water

[0037] 3) mixing the mixed bacteria suspension obtained in step 2) with a sodium alginate solution, and then mixing with a calcium chloride solution to generate a cross-linking reaction;

[0038] 4) Mix the product in step 3) with the curing agent (the mass ratio of the product in step 3) to the curing agent top-seal is 1:25), adjust the pH value to 8.5, and stir until evenly distributed; after natural dehydration, molding , that is maintenance.

[0039] The mass concentration of sodium alginate is 7.5%; the mass concentration of calcium chloride solution is 5.5%; the volume ratio of sodium algina...

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Abstract

The invention provides a household garbage landfill sub-base layer material and a preparation method thereof. The material can reduce the possibility of secondary pollution to the environment caused by percolate leakage of a household garbage landfill. According to the invention, the function is realized in a way that bacillus pseudofirmus is added into the household garbage landfill sub-base layer material. When the sub-base layer cracks due to unknown factors, bacillus pseudofirmus can be activated after being in contact with water to generate limestone so as to bond cracks and prevent leachate from further leakage, so that the material has a remarkable environmental protection effect, and secondary pollution is reduced.

Description

technical field [0001] The invention relates to the field of prevention and control of secondary pollution in domestic waste landfills, in particular to a subbase material acting on domestic waste landfills and a preparation method thereof. Background technique [0002] The rapid development of the global economy, followed by the explosive increase of urban population, has gradually highlighted the contradiction between the environment and human life, and the large increase in domestic waste has greatly affected people's quality of life. In order to temporarily dispose of these garbage and avoid crowd gathering places so as not to affect human life, a large number of garbage landfills were built at the edge of the city, and the number and scale continued to increase with the gradual expansion of the city. Although the existence of the landfill temporarily solved the problem of garbage dumping, it was followed by the extremely serious problem of the surrounding ecological env...

Claims

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Application Information

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IPC IPC(8): C04B28/02C12N11/10C12N11/04C02F3/34C12R1/125C12R1/085C12R1/07C02F103/06C04B111/27C04B111/34
CPCC04B28/02C12N11/10C12N11/04C02F3/34C02F2103/06C04B2111/343C04B2111/27C04B2111/00293C04B24/38C04B22/124C04B2103/0001Y02W30/30
Inventor 侯浩波纪建业江俊锋韩旭叶非华张鹏举李银生徐兰
Owner 肇庆市武大环境技术研究院
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