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Ditch matrix for controlling ammonia nitrogen in paddy field recession and preparation method of ditch matrix

A preparation method and paddy field technology, applied in the field of non-point source pollution control in farmland, can solve problems such as poor ammonia nitrogen resistance and control ability, and achieve the effects of strengthening adsorption performance, strengthening physical adsorption, and promoting biodegradation

Inactive Publication Date: 2014-08-20
NORTHEASTERN UNIV LIAONING
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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 that the matrix at the bottom of the paddy field dewatering ditch has poor ability to resist and control ammonia nitrogen, and to provide a ditch matrix for preventing and controlling ammonia nitrogen in paddy field dewatering water and its preparation method. The denitrification microorganisms provide a good metabolic environment, so that after the ammonia nitrogen is adsorbed, the microbial degradation can be completed synchronously, resulting in a completely purified result

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Treatment of meadow brown loam soil

[0034] Select organic matter (OM) content (mass fraction) to be the meadow brown soil of 15-18%, dig out the surface layer 0-20cm depth part, spread out and air-dry, after treating that its water content (mass fraction) is 40%, its Broken, remove stones, plant residues and other sundries, set aside;

[0035] 2. Sand treatment

[0036] Use a sieve with an aperture of 0.5mm to sieve the sand, and discard the undersize; use a sieve with an aperture of 0.8mm to sieve the above-mentioned oversize to obtain the undersize, and obtain sand with a particle size range of 0.5-0.8mm for future use. ;

[0037] 3. Activated sludge treatment

[0038] Get the activated sludge from the aeration tank of the municipal sewage treatment plant, after settling and dehydrating, air-dry naturally, when the water content is 80% (mass fraction), break evenly, and set aside;

[0039] 4. Coal slag treatment

[0040] Take coal slag with a porosity of 50-53...

Embodiment 2

[0047] 1. Treatment of meadow brown loam soil

[0048] Select meadow brown soil with an organic matter (OM) content (mass fraction) of 22-25%, dig out the surface layer at a depth of 0-20cm, spread it out and air-dry it, and after its moisture content is 50%, crush it and remove the stones. Blocks, plant residues and other sundries, spare;

[0049] 2. Sand treatment

[0050] Use a sieve with an aperture of 1.6mm to sieve the sand, and discard the undersize; use a sieve with an aperture of 2.0mm to sieve the above-mentioned oversize to obtain the undersize, and obtain sand with a particle size range of 1.6-2.0mm for future use. ;

[0051] 3. Activated sludge treatment

[0052] Get the activated sludge from the aeration tank of the municipal sewage treatment plant, after settling and dehydrating, air-dry naturally, when the moisture content is 85% (mass percentage), break evenly, and set aside;

[0053] 4. Coal slag treatment

[0054] Take coal slag with a porosity of 57-60...

Embodiment 3

[0061] 1. Treatment of meadow brown loam soil

[0062] Select the meadow brown soil with an organic matter (OM) content (mass fraction) of 18-20%, dig out the surface layer at a depth of 0-20cm, spread it out and air-dry it, and after its moisture content is 42%, crush it and remove the stones. Blocks, plant residues and other sundries, spare;

[0063] 2. Sand treatment

[0064] Use a sieve with an aperture of 0.8mm to sieve the sand, and discard the undersize; use a sieve with an aperture of 1.0mm to sieve the above-mentioned oversize to obtain the undersize, and obtain sand with a particle size range of 0.8-1.0mm for future use. ;

[0065] 3. Activated sludge treatment

[0066] Get the activated sludge in the aeration tank of the municipal sewage treatment plant, after settling and dehydrating, air-dry naturally, and when the water content is 82% (mass percentage), it is evenly broken and set aside;

[0067] 4. Coal slag treatment

[0068] Take coal slag with a porosity...

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Abstract

The invention relates to a farmland non-point source pollution control technology and aims to provide a ditch matrix for controlling ammonia nitrogen in paddy field recession and a preparation method of the ditch matrix in order to solve the problem that the matrix at the bottom of a paddy field recession ditch has a poor purification effect for ammonia nitrogen. The matrix is composed of meadow burozem soil, sand, activated sludge, coal cinder and Paracoccus denitrification sp. The concrete preparation method comprises the steps of firstly, treating sand, meadow burozem soil and activated sludge, and culturing Paracoccus denitrification sp.; then, adding sand into meadow burozem soil; next, adding activated sludge into the mixture; adding coal cinder into the mixture; inoculating a bacterial liquid into the mixture; and uniformly mixing the mixture to obtain the ditch matrix for controlling ammonia nitrogen in paddy field recession. The novel matrix is good in ammonia nitrogen adsorption performance and capable of providing a favorable metabolization environment for denitrifying bacteria and ensuring that microbial degradation can be synchronously finished and a complete purification effect is achieved after ammonia nitrogen is adsorbed.

Description

technical field [0001] The invention relates to the control technology of farmland non-point source pollution, in particular to a ditch substrate for preventing and controlling ammonia nitrogen in the draining water of paddy fields and a preparation method thereof. Background technique [0002] Paddy field dewatering is an important link in the rice production process. Water from paddy fields is generally transported to nearby rivers or lakes through natural or man-made ditch systems. Due to the large amount of chemical fertilizers used in the rice production process, there must be a high concentration of ammonia nitrogen compounds in the receding water from the paddy field. After entering the adjacent surface water body, it will cause the water body to lack oxygen and cause eutrophication. Therefore, effectively controlling the output of ammonia nitrogen during the water receding process can reduce the risk of eutrophication of surface water. However, due to the short dur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
Inventor 李英华李海波徐新阳宫璇周咏春陈熙
Owner NORTHEASTERN UNIV LIAONING
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