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Methane oxidation covering material for life refuse landfill

A technology for methane oxidation and covering materials, which is applied in soil conditioning materials, organic fertilizers, fertilizer mixtures, etc., can solve the problem of no methane oxidation effect, etc., and achieve obvious social and economic benefits, extensive promotion, and low manufacturing costs.

Inactive Publication Date: 2007-10-31
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because dewatered sludge has no methane oxidation effect (on the contrary, a large amount of methane will be produced under anaerobic conditions), the dewatered sludge-mineralized waste mixed material is limited to be used as a landfill cover material, and has no methane oxidation effect

Method used

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  • Methane oxidation covering material for life refuse landfill
  • Methane oxidation covering material for life refuse landfill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Please refer to attached picture 1.

[0030] The mass percentage of raw materials used in the present invention is mineralized waste (0.5mm-4cm):mineralized sludge=70%:30% (dry basis).

[0031] Stir and mix the above raw materials evenly and fill them into the domestic waste reaction column as the covering material. At room temperature, the lower ends of the five reaction columns were connected with methane and CO mixed in different proportions. 2 Mixed gas (methane content between 50-60%). Support it with brackets at the bottom of the column. There are three layers of household garbage and covering materials that have been preliminarily screened and processed in sequence on the support. The thickness of domestic garbage is 30cm, the thickness of the first and second covering layers is 18cm, and the thickness of the final covering layer is 30cm. The test point is set at the upper end of each cover layer, and the test point 3 is set after the final cover layer is seale...

Embodiment 2

[0035] Using the same experiment as in Example 1, 4 kinds of mineralized sludge, soil, mineralized garbage, mineralized garbage and mineralized sludge mixture (covering material of the present invention) are used as domestic waste landfill covering materials respectively , the methane oxidation rates in landfill biogas were 10-20, 30-40, 50-70, and 70-80%, respectively. Therefore, the mixture of mineralized waste or mineralized waste and mineralized sludge (dry weight ratio 7:3) has a higher oxidation effect on methane in domestic waste landfill biogas.

[0036] The analysis of methane-oxidizing bacteria in mineralized waste, mineralized sludge, and common cover soil from the molecular level shows that the types and numbers of methane-oxidizing bacteria in mineralized waste are significantly more than those in common cover soil and mineralized sludge. Sequencing results showed that the mxaf gene in mineralized waste had many different mutant forms, further confirming the diver...

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Abstract

The invention discloses a methane-oxidizing covering material of landfill life waste site, which comprises the following steps: allocating mass percent (dry group) of mineralizing garbage and mineralizing sludge as 20-100% : 0-80%; choosing the mineralizing garbage with grain size at 0. 5mm-4cm and buried above 8 years; choosing the mineralizing sludge with moisture percentage at 50%-70% sludge and buried above 5 years. This invention possesses explicit social benefit and economic benefit and low cost, which can be fit for landfill life waste site widely.

Description

technical field [0001] The invention relates to a methane oxidation covering material of domestic waste landfill, which relates to a field covering material for reducing greenhouse gas emission of domestic waste landfill. It belongs to the field of solid waste recycling. Background technique [0002] Methane is an important greenhouse gas, which contributes about 20% to the global warming effect. Due to the imbalance between methane production and consumption, in the past 300 years, the concentration of methane in the atmosphere has risen from 0.75hd / L to 1.71hd / L, and it is rising rapidly at a rate of 1%-2%. [0003] According to recent studies, landfills are the third largest source of methane in the atmosphere after wetlands and rice fields. According to statistics, by 2002, the annual discharge of solid waste in the world is about 8-10 billion tons, and our country is about 600 million tons. Municipal waste is an important part of solid waste...

Claims

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Application Information

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IPC IPC(8): C04B18/30C09K17/52C09K3/00B09B3/00B09B1/00
CPCY02W30/91
Inventor 赵由才焦刚珍牛冬杰柴晓利何岩王星
Owner TONGJI UNIV
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