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Paddy soil and matured compost mixed methane biofilter material

A technology of biological filter material and decomposed compost, which is applied in the field of environmental pollution control, can solve the problems of high volume, poor porosity, and large amount of paddy soil usage, achieves simple preparation method, improved methane removal rate, great practical significance and The effect of applying value

Active Publication Date: 2016-02-10
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the surface layer (soil layer 0-10cm away from the soil surface) paddy field soil is a natural and efficient natural inoculant for methane microorganisms, and landfills currently use soil as the covering soil and final covering soil of the working surface of the landfill. , the disadvantage is that the amount of soil used in the paddy field is slightly larger, so the volume is higher, and the porosity is slightly worse

Method used

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  • Paddy soil and matured compost mixed methane biofilter material
  • Paddy soil and matured compost mixed methane biofilter material
  • Paddy soil and matured compost mixed methane biofilter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1, paddy field soil and the influence of mass addition ratio of decomposed compost on methane removal rate in filter material

[0063] 1. Methane pre-incubation time

[0064] Three samples were set up: paddy soil (PS), decomposed compost (LC), decomposed compost and paddy soil (LC:PS=1:1, w / w). The main physical and chemical properties of paddy soil and decomposed compost are shown in Table 1. Adjust the mass water content of the sample dry basis (the sample obtained after natural air drying) to 20%, and the initial gas filling ratio is about 5% (V / V), and investigate the change of the methane removal rate over time. The main physical and chemical indicators of paddy field soil and decomposed compost are shown in Table 1. The specific method is to place the sample in a 250mL serum bottle, seal the serum bottle with a butyl rubber stopper, use a syringe to replace part of the headspace air in the bottle with standard methane gas (99.99%, V / V), and make the se...

Embodiment 2

[0075] Embodiment 2, the impact of water content on filter material methane removal rate in methane biological filter material

[0076] When the optimal mass addition ratio of decomposed compost in rice field soil and decomposed compost mixture is 10%, add distilled water to adjust the mass moisture content in methane biological filter material to 10%, 20%, 30%, 40% and 50%, according to The method described in Example 1 was subjected to three CH 4 Inflated, using gas chromatography, after the third inflated serum bottle, regularly measure the CH in the headspace 4 The concentration of CH in the biological filter material is investigated 4 Changes in removal rate over time.

[0077] image 3 It is the influence of mass water content in methane biological filter material on its methane removal rate. Depend on image 3 It can be seen that the mass water content in the filter material has a significant impact on the methane removal efficiency. The methane removal rate in the...

Embodiment 3

[0078] Embodiment 3, the impact of ammonium nitrogen in the methane biological filter material on the removal rate of methane in the filter material

[0079] Under the condition that the optimal mass addition ratio of paddy field soil and decomposed compost mixture in the methane biofilter is set (the mass ratio of the paddy field soil is 10:90), and the mass moisture content is 30%, the following 1 steps are carried out respectively. ) and 2) operations:

[0080] 1) Add NH to the filter material 4 Cl, making the content of adding ammonium nitrogen in the filter material (every Kg filter material) is respectively 0mg / kg, 25mg / kg, 50mg / kg, 100mg / kg, 150mg / kg and 200mg / kg;

[0081] 2) Add KNO 3 , the content (every Kg filter material) that adds nitrate nitrogen in the filter material is respectively 0mg / kg, 25mg / kg, 50mg / kg, 100mg / kg, 150mg / kg and 200mg / kg.

[0082] As the method described in Example 1, measure CH in the filter material 4The removal rate changes with time, a...

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Abstract

The invention discloses a paddy soil and matured compost mixed methane biofilter material which is composed of paddy soil, matured compost and a nitrogen source, wherein the nitrogen source is ammonium nitrogen and nitrate nitrogen; the mass ratio of the paddy rice and the matured compost is (50-100): (0-50), but the additive amount of the paddy soil is not 100, and the additive amount of the matured compost is not zero; the additive amount of the ammonium nitrogen is 0-100 mg / Kg of the methane biofilter material but is not zero; the additive amount of the nitrate nitrogen is 0-200 mg / Kg of the methane biofilter material but is not zero; the water content by mass of the methane biofilter material is 20-50%. The biofilter material disclosed by the invention has the following advantages that the mixed methane biofilter material can obviously improve the methane removal rate of a single filter material component and can remarkably improve the methane removal capacity of the filter material within a same time; the preparation method for the biofilter material is simple and feasible and the biofilter material has important practical meaning and application value in emission reduction of greenhouse gas methane.

Description

technical field [0001] The invention relates to a methane biological filter material mixed with paddy field soil and decomposed compost, belonging to the technical field of environmental pollution control. Background technique [0002] In recent years, due to global economic growth and the intensification of human activities, a large amount of carbon dioxide, nitrous oxide, methane and other gases have been discharged into the atmosphere. where CH 4 is the greenhouse effect second only to CO 2 A greenhouse gas that contributes about 15% to the greenhouse effect and is one of the important factors leading to global warming. Therefore, effective control or reduction of CH 4 Anthropogenic emissions have become one of the keys to slow down the greenhouse effect. [0003] To reduce CH 4 For emissions, researchers at home and abroad have made a lot of attempts. Currently, CH 4 Emission reduction technologies mainly include CH 4 Gas energy recovery, torch incineration and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/72C05F17/00
CPCY02A50/20Y02E50/30Y02W30/40
Inventor 李国学杜龙龙邓辉袁京
Owner CHINA AGRI UNIV