Methane control method for household garbage quasi-aerobic landfill

A control method and domestic waste technology, applied in methane capture, solid waste removal, greenhouse gas capture, etc., can solve problems such as high operation and management costs, large power consumption, complex processes and equipment, etc., to achieve fast waste decomposition, Accelerate the stabilization of garbage and the effect of fast stabilization of the pile

Inactive Publication Date: 2016-11-16
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantages of aerobic landfill are also obvious
During the operation of the landfill, it is necessary to feed air into the wide and thick landfill every day, so the process and equipment are complicated, the power consumption is large, and the operation and management costs are high.

Method used

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  • Methane control method for household garbage quasi-aerobic landfill
  • Methane control method for household garbage quasi-aerobic landfill
  • Methane control method for household garbage quasi-aerobic landfill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The experimental sampling site is Zhuozhou quasi-aerobic landfill in Hebei Province.

[0039] The basic construction method of the quasi-aerobic landfill is as follows: a compacted clay liner with a thickness of 20-30 cm is laid on the flat and compacted foundation soil, and a high-density polyethylene (HDPE) film is laid on it. Geotextiles are respectively laid on the HDPE membrane, and a leachate drainage layer with a thickness of 50-60 cm is laid on the geotextiles, in which the leachate drainage pipe is buried. The end of the leachate drainage pipe is connected to the atmosphere, so that the leachate produced can be discharged in time, and the outside air can freely enter the landfill. The leachate drainage pipe is protected by a gabion. The leachate drainage pipe is connected with the vertical perforated airway with openings. The hole diameters of the vertical perforated airway are 12-16 mm, and the hole distance is 6-10 cm. The vertical perforated airway is used ...

Embodiment 2

[0059] Using the experimental method in Example 1, an intermediate covering layer is respectively laid on the working surface of each experimental landfill area. The intermediate covering layer adopts a mixture of mineralized waste: new covering soil weight ratio of 1:10, and its parameters are changed. Each intermediate The covering layer is laid 25m×25m. Study the specific parameters of the intermediate overburden and the CH on the surface of the landfill area 4 The relationship between gas fluxes.

[0060] Among them, the specific parameters of the middle covering layer are shown in Table 2; the test results are shown in Table 3.

[0061] Table 2: Intermediate Overlay Parameters

[0062]

[0063] Table 3: CH on the surface of the landfill 4 Comparison of gas flux detection results

[0064]

[0065]

[0066]The above studies show that the thickness of the intermediate covering layer directly affects the flux of methane gas released from the surface of the landfi...

Embodiment 3

[0070] Using the quasi-aerobic landfill of domestic waste in Example 1, the landfill units are buried successively along the horizontal direction to form a landfill layer, and the surface of each layer of landfill layer is covered with an intermediate covering layer, and the intermediate covering layer is new The mixture of covering soil and mineralized waste with a weight ratio of 10:1, the particle size of mineralized waste is 3-10mm, and the particle size of new covering soil is 0.02-0.2mm. Its structural diagram is as image 3 shown.

[0071] Among them, 10 experimental areas were set up in the landfill, and the parameters of the vertical air ducts and gabions in each experimental area are shown in Table 4:

[0072] Table 4: Parameters of vertical air ducts and gabions

[0073]

[0074]

[0075] The methane gas in the air duct is detected by setting a gas collection device in the vertical perforated air duct. The concentration detection in the air duct uses a four...

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Abstract

The application relates to the technical field of garbage treatment and particularly relates to a methane control method in a garbage treatment process. Vertical perforated gas guide tubes are arranged in a household garbage quasi-aerobic landfill, and the distance between two adjacent vertical perforated gas guide tubes is 20-25m; in the garbage landfill, middle covering layers cover the surfaces of landfill layers, and the middle covering layers are mixtures of new covering soil and mineralized garbage in a weight ratio of 10 to 1-2; and a horizontal perforated gas guide tube is arranged between every two landfill layers. The methane control method provided by the application reduces the output of greenhouse gas methane to the maximum extent and provides advantages to garbage degradation. The garbage is relatively fast to decomposed, the landfill stable speed is fast, and meanwhile, the method makes full use of the oxidizing ability of a quasi-aerobic landfill pile body and a methane oxidizing covering layer to methane gas, so that forced ventilation is not needed, and the energy sources are saved; the method is simple and feasible in construction, maintenance and management, and the operating cost is relatively low.

Description

technical field [0001] The present application relates to the technical field of waste disposal, in particular, to a methane control method for quasi-aerobic landfill of domestic waste. Background technique [0002] Sanitary landfill, as a method with low cost, simple technology and large processing capacity, has become the main method of waste disposal in most countries. According to the oxygen content in the garbage layer, sanitary landfill can be divided into three types: anaerobic, aerobic and quasi-aerobic. Among them, anaerobic landfill is a widely used municipal solid waste disposal method in my country. This method is to separate the landfill body from the surrounding environment, and after a long period of anaerobic fermentation, the waste can be finally stabilized and harmless. The anaerobic landfill method has the advantages of low investment, low treatment cost, simple process, convenient management, and no strict requirements on waste components. However, anae...

Claims

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Application Information

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IPC IPC(8): B09B1/00B09B3/00
CPCB09B1/004B09B3/00Y02C20/20
Inventor 岳波黄启飞吴小卉黄泽春晏卓逸
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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