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Refuse landfill obnoxious gas in-situ control method

A technology for landfill and malodorous gas, which is applied in the fields of landfill technology, deodorization, solid waste removal, etc. The effect of strong adsorption capacity

Active Publication Date: 2012-11-14
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of odor pollution in landfills and provide an in-situ control method for odorous gases in landfills

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 1000kg of dehydrated raw sludge (moisture content 70%) from a sewage plant in Hangzhou, add 150kg of sawdust, reflux clinker 40kg, adjust the moisture content to about 60%, and the carbon-nitrogen ratio to 30:1. Static forced ventilation is used for composting , ventilation volume 20m 3 h -1 d -1 . After 30 to 50 days of composting, the sludge composting product is obtained. Mix the sludge compost with 5000kg of clay, and use it as the sunburst of the landfill to cover the surface of the landfill with a thickness of 10cm, and level and compact it. After 30 days of continuous monitoring, the results show that the landfill layer has a great influence on H 2 S, NH 3 And the removal rate of other organic malodorous gases can reach more than 80%.

Embodiment 2

[0028] Take 5000kg of dehydrated raw sludge (moisture content 70%) from a sewage plant in Hangzhou, add 400kg of bamboo charcoal, 750kg of sawdust, and 200kg of reflowed clinker, adjust the moisture content to about 60%, and the carbon-nitrogen ratio to 30:1, using static forced ventilation For composting, the ventilation volume is 20m 3 h -1 d-1 . After composting for 30 to 50 days to reach maturity, the sludge bamboo charcoal composting product is obtained, which is used as the sun cover soil of the landfill site to cover the surface layer of the landfill waste, with a thickness of 20 cm, and is leveled and compacted. After 30 days of continuous monitoring, the results show that the landfill layer has a great influence on H 2 S, NH 3 and other organic malodorous gases can reach a removal rate of over 89%, and the output gas concentration is lower than the secondary standard limit in the "Discharge Standard of Odor Pollutants" (GB14554-93).

[0029] Inoculate 500kg of deo...

Embodiment 3

[0031] Take 1000kg of livestock and poultry manure (moisture content 75%) from a livestock and poultry farm in Hangzhou, add 750kg of wood chips, reflow clinker 200kg, adjust the moisture content to about 60%, and the carbon-nitrogen ratio to 30:1, and use static forced ventilation for composting Handling, ventilation volume 25m 3 h -1 d -1 . After composting for 30-50 days to reach maturity, the composting product of livestock and poultry manure is obtained, which is mixed with 5000kg of clay and used as the middle covering soil of the landfill to cover the surface layer of the landfill waste, with a thickness of 25cm, leveled and compacted. After 30 days of continuous monitoring, the results show that the landfill layer has a great influence on H 2 S, NH 3 and other organic malodorous gases, the removal rate can reach more than 86%, and the output gas concentration is lower than the secondary standard limit in the "Odor Pollutant Emission Standard" (GB 14554-93).

[003...

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Abstract

The invention discloses a refuse landfill obnoxious gas in-situ control method, belonging to the filed of environmental protection. The method comprises the following steps: evenly mixing 20-100 parts of obnoxious in-situ control cover material by weight with 0.1-80 parts of refuse landfill covering soil by weight to obtain refuse landfill obnoxious in-situ control covering soil; adding 0.1-10 parts of deodorizing microbial inoculum by weight into the refuse landfill obnoxious in-situ control covering soil, then evenly mixing; and taking the conditioned refuse landfill obnoxious in-situ control covering soil as daily covering soil, intermediate covering soil or final covering soil to cover the surface of filled refuse or the surface layer of the covering soil, leveling and appropriately compacting. The method can effectively improve and condition the obnoxious pollution control effect during the refuse landfill process, thereby reducing the use amount of filled covering soil, saving effective reservoir storage capacity and prolonging the service life of the refuse landfill; and the method utilizes waste to treat refuse, realizes emission reduction of the obnoxious gas and breaks anew way for recycling utilization of agriculture and municipal administration solid waste, thus having obvious social, environmental and economical benefits.

Description

technical field [0001] The invention relates to a method for controlling stench pollution, in particular to a method for in-situ control of stench gas in a landfill site. Background technique [0002] With the rapid development of our country's social economy, the level of urbanization and the level of residents' living consumption have been greatly improved, and the amount of urban domestic waste is increasing day by day. According to statistics, in 2008, the amount of municipal solid waste produced in my country reached 155 million tons, and it is increasing at an annual rate of 8% to 10%. More than 80% of municipal solid waste is disposed of in sanitary landfill. According to the current economic situation and the development trend of municipal solid waste in the future, sanitary landfill will still be the main method of harmless disposal of domestic solid waste in a long period of time. Although my country has made breakthroughs in technical research on municipal solid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B1/00A61L9/01A61L101/52
CPCY02W30/30
Inventor 丁颖吴伟祥姜俊郑学娟徐月恩陈英旭胡斌蔡传钰
Owner ZHEJIANG UNIV
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