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Household garbage sanitary landfill covering method for loess area

A technology for domestic garbage and loess areas, applied in landfill technology, solid waste removal, etc., can solve problems such as waste of resources, nowhere to place earth, soil erosion on slopes, etc., to increase quantity and stability, organic matter The content is beneficial and the effect of microbial activity enhancement

Active Publication Date: 2020-05-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, domestic garbage sanitary landfills mainly use HDPE film covering and earthwork covering for daily and intermediate covering. Although HDPE film covering can effectively prevent light garbage from scattering, reduce the breeding of mosquitoes and flies, and achieve rain and sewage diversion to a certain extent, HDPE film covering The capital investment is high, and the HDPE film is easy to age and damage under strong sunlight, and the problems of landfill gas and odor cannot be solved. In addition, in the northwestern region where earthwork is abundant, the use of HDPE film will also cause landfill construction. There is nowhere to place excess earth, resulting in waste of resources
Directly use the native loess in Northwest China to cover the domestic waste landfill. On the one hand, the native loess has low water content and fine sand particles, and its covering strength for landfill waste is low. It is easy to generate dust in sunny and windy weather. Weather can easily lead to soil erosion on slopes; on the other hand, the permeability coefficient of native loess is 6.0×10 -4 cm / s, the field water holding capacity is about 23%, its water holding capacity and anti-seepage effect are poor, and it is easy to increase the landfill leachate production in rainy weather; in addition, the biological activity of primary loess is extremely low, which is not suitable for landfill gas and odor. The degradation effect of gas is also not good

Method used

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  • Household garbage sanitary landfill covering method for loess area
  • Household garbage sanitary landfill covering method for loess area
  • Household garbage sanitary landfill covering method for loess area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Experimental group 1:

[0025] The loess is dumped on the surface of the landfill garbage 6 in the domestic waste landfill, and the loess is paved and compacted with a bulldozer to form a closed and uniform loess daily cover layer 5 with a thickness of 0.5m, and then the loess cover layer Shallow trenches 7 are plowed on the surface. The cross section of the shallow trenches 7 is an inverted triangle, the depth of the trench bottom is 0.1m, and the distance between the trenches is 0.3m. The leachate guide pipe 2 enters the storage tank 3, and after being stored in the storage tank 3 and stabilized until the B / C of the leachate is less than 1, the leachate in the storage tank 3 is lifted to the irrigation pipeline by the lift pump 4. Irrigate to the surface of the loess cover layer 5 by sprinkling water.

[0026] The local minimum temperature in the area where the domestic garbage landfill site belongs to is about 25°C, so the surface load of leachate sprinkling irrigat...

Embodiment 2

[0038] Experimental group 2:

[0039] The loess is dumped on the landfill garbage 6 surface in the domestic waste landfill, and the loess is paved and compacted with a bulldozer to form a closed and uniform loess daily cover layer 5 with a thickness of 0.4m, and then the loess cover layer Shallow trenches 7 are plowed on the surface. The cross section of the shallow trenches 7 is an inverted triangle, the depth of the trench bottom is 0.15m, and the distance between the trenches is 0.4m. The leachate guide pipe 2 enters the storage tank 3, and after being stored in the storage tank 3 and stabilized until the B / C of the leachate is less than 1, the leachate in the storage tank 3 is lifted to the irrigation pipeline by the lift pump 4. Irrigate to the surface of the loess cover layer 5 by sprinkling water.

[0040] In this example, the local minimum temperature in the area where the domestic waste landfill belongs is about 10°C, so the surface load of leachate sprinkling irriga...

Embodiment 3

[0052] Experimental group 3:

[0053] The loess is dumped on the surface of the landfill garbage 6 in the domestic waste landfill, and the loess is paved and compacted with a bulldozer to form a closed and uniform loess intermediate covering layer 5 with a thickness of 0.8m, and then the surface of the covering layer Plow out the shallow ditch 7, the cross section of the shallow ditch 7 is an inverted triangle, the depth of the ditch bottom is 0.2m, and the distance between the ditch is 0.4m. The filtrate guide pipe 2 enters the adjustment storage tank 3, and after the storage tank 3 stabilizes until the B / C of the leachate is less than 1, the leachate in the adjustment storage tank 3 is lifted to the irrigation pipeline by the lift pump 4. The sprinkler method is used to irrigate to the surface of the loess overburden layer 5 .

[0054] The domestic waste landfill in this example belongs to the loess area and the local minimum temperature is about 5°C, so the surface load of...

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Abstract

The invention discloses a household garbage sanitary landfill covering method for a loess area, and belongs to the technical field of garbage landfill. The method comprises the following steps that loess covers landfill garbage in a household garbage landfill to form a loess covering layer, a shallow trench is plowed out on the surface of the loess covering layer, and when the minimum temperatureof the area is not less than 5 DEG C, a landfill garbage leachate is irrigated to the surface of the loess covering layer in a sprinkling manner. The household garbage sanitary landfill covering method is simple and convenient to operate, not only can effectively utilize the loess and the landfill leachate with sufficient earthwork amount at the local area, saves land resources, reduces the treatment amount of the leachate, but also the method can effectively improve the covering layer strength and the content of organic matter, and can improve the water holding capacity of the loess coveringlayer and improve the anti-seepage capacity of the loess covering layer while avoiding the problems of raised dust and water and soil loss caused by loess covering; furthermore, landfill gas generatedby landfill garbage can also be subjected to biodegradation, and the degradation effect is good.

Description

technical field [0001] The invention specifically relates to a sanitary landfill covering method for domestic garbage in loess areas, and belongs to the technical field of garbage landfill. Background technique [0002] Due to its excellent economic benefits, sanitary landfill is one of the mainstream technologies for dealing with mixed collection of domestic waste. With the continuous improvement of my country's economic level and residents' living standards, the output of domestic waste has increased year by year, and at the same time, more and more attention has been paid to environmental protection, and then the requirements for the scale and quality of sanitary landfills have also increased accordingly. According to the requirements of the Ministry of Housing and Urban-Rural Development of the People's Republic of China, "Technical Specifications for Sanitary Landfill Treatment of Domestic Garbage (GB50869-2013)" and "Technical Regulations for Operation and Maintenance ...

Claims

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Application Information

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IPC IPC(8): B09B1/00B09B3/00
CPCB09B1/004B09B3/00Y02W30/30
Inventor 何品晶邵立明陈俊岚吕凡章骅彭伟
Owner TONGJI UNIV
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