Method for controlling obnoxious gas of urban refuse landfill

A technology for malodorous gas and municipal waste, which is applied in the control of malodorous gas and the field of malodorous gas in urban landfills, can solve the problems of high cost and long-lasting effect, and achieve the effect of simple and easy technology and improving air environment conditions.

Inactive Publication Date: 2010-08-18
EAST CHINA NORMAL UNIVERSITY +1
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Problems solved by technology

[0003] Landfill odor gas has the characteristics of large amount of production, long duration, and wide range of influence.

Method used

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Embodiment Construction

[0024] The technical characteristics of the present invention will be further elaborated below in conjunction with specific embodiments.

[0025] In the invention, the leachate is pretreated off-site to change its properties and composition, and then returned to the landfill for recharging. Since the water quality after different pretreatment methods has different effects on the landfill layer, it has different effects on the gas production status. For example, the leachate recharge after anaerobic treatment can accelerate the stabilization process of the landfill, improve the matrix conditions in the landfill layer and increase the gas volume of methane; while the recharge after aerobic treatment can greatly remove garbage and seepage Nitrogen and sulfide in the filtrate, while reducing the amount of odor. The pH change of leachate water quality can also inhibit the composition and concentration of odor produced by landfill waste. The leachate recharge after proper pretreat...

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Abstract

The invention discloses a method for controlling obnoxious gas of an urban refuse landfill, which belongs to the field of environment protection. The method comprises the following steps: 1) percolate pretreatment: installing aged landfill refuse and porous carriers on filling materials in a reaction vessel, installing a water distributor on the top of the reaction vessel for uniform water distribution, uniformly distributing adjustable perforated aeration devices on the upper middle part of the reaction vessel; and converting organic nitrogen into ammonia nitrogen and converting ammonia nitrogen into nitrate nitrogen under the aerobic condition; and 2) back filling after the percolate pretreatment: selecting proper hydraulic load and back filling frequency in the back filling process, adopting the hydraulic load between 5 and 20 mm/d and the frequency between 6 and 12 times per day, and regulating the factors according to seasons and weather. Through the implementation of the technical scheme of the invention, the obnoxious gas exhaust of the refuse landfill can be effectively controlled, and the air environment condition of the refuse landfill and surrounding areas can be improved. The technology is simple, can be easily implemented, uses waste materials for treating waste materials, has the advantages of economy, environment protection, high efficiency and low consumption, and has practical application value on the control of the obnoxious gas of the refuse landfill.

Description

technical field [0001] The invention discloses a method for controlling malodorous gas, in particular to a method for controlling malodorous gas in urban waste landfills, and belongs to the field of environmental protection. Background technique [0002] Garbage sanitary landfill is the main method of urban domestic garbage disposal in all countries in the world, and it will still be the main garbage disposal method in my country for a long time to come. During the landfill process, various secondary pollutants will be produced, such as leachate and exhaust gas pollution. Waste gas from landfills often contains a large amount of odorous gas pollutants, which are highly irritating and toxic, and have a serious impact on the environment and human health. With the rapid development of economy in our country, the amount of garbage generated has increased rapidly. Due to reasons such as processing capacity and technical level, none of the waste landfills in many cities has disc...

Claims

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Application Information

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IPC IPC(8): B09B1/00
Inventor 谢冰
Owner EAST CHINA NORMAL UNIVERSITY
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