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Method for preparing soil improver from municipal solid waste leachate

A technology for municipal solid waste and soil conditioner, applied in soil conditioning materials, chemical instruments and methods, applications, etc., can solve the problems of heavy metal pollution, easily damaged filter membranes, low recycling efficiency, etc., to eliminate negative effects, preparation technology Simple, wide-ranging effects

Active Publication Date: 2019-12-10
浙江慧科环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the advanced oxidation method has problems such as single use method, low disposal efficiency, unstable working conditions and poor technical compatibility.
The application of membrane treatment technology to dispose of municipal solid waste leachate has problems such as easy damage of the filter membrane, clogging and poor retention of heavy metals in the filter membrane.
Biological treatment technology is not suitable for municipal solid waste leachate with complex components. High-concentration organic waste and heavy metal ions not only inhibit the growth of microorganisms but also cause the adsorption of heavy metals and some refractory organic substances in activated sludge, which significantly increases the cost of sludge disposal in the later stage
Land treatment technology has problems such as effluent water quality not up to standard, pipeline blockage, and high equipment maintenance costs in the later stage.
Generally speaking, these disposal technologies are mainly aimed at the harmless disposal of municipal solid waste leachate. Not only the disposal effect is poor, there are many problems, but also the high concentration of ammonia nitrogen, phosphorus salt, organic acid and other substances in the leachate are not fully utilized.
At present, there are a few reports on the recovery of ammonia nitrogen and humic acid from municipal solid waste leachate, but these reports have problems such as low recovery efficiency, heavy metal pollution, and doping of organic pollutants.

Method used

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  • Method for preparing soil improver from municipal solid waste leachate
  • Method for preparing soil improver from municipal solid waste leachate
  • Method for preparing soil improver from municipal solid waste leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 The effect of humus addition on the performance of the soil conditioner prepared by municipal solid waste leachate

[0026] Preparation of soil improver: weigh 30 parts, 35 parts, 38 parts, 40 parts, 50 parts, 60 parts, 62 parts, 65 parts, 70 parts of humus soil, 8 parts of tuff, 5 parts of phosphogypsum, iron powder 15 parts and 5 parts of aluminum powder, and then mix the corresponding mass of humus with the above-mentioned weighed tuff, phosphogypsum, iron powder, and aluminum powder, and stir evenly to obtain nine groups of leachate pre-additive materials. According to the solid-liquid ratio of 30:100mg / mL, the leachate pre-addition material and municipal solid waste leachate were weighed respectively (the leachate was taken from a municipal solid waste landfill plant in Lianyungang, the leachate COD 2314mg / L, ammonia nitrogen 1875mg / L, Total phosphorus 64mg / L, zinc ion 28mg / L, copper ion 42mg / L), then pour the leachate pre-addition material and municipal ...

Embodiment 2

[0041] Example 2 The effect of tuff addition on the performance of the soil conditioner prepared by municipal solid waste leachate

[0042] Preparation of soil conditioner: Weigh 6 parts, 7 parts, 7.5 parts, 8 parts, 10 parts, 12 parts, 12.5 parts, 13 parts, 14 parts of tuff, 60 parts of humus and 10 parts of phosphogypsum according to the mass ratio , 20 parts of iron powder, 10 parts of aluminum powder, and then mix humus, tuff, phosphogypsum, iron powder, and aluminum powder of corresponding quality, and stir evenly to obtain nine groups of leachate pre-additive materials. According to the solid-liquid ratio of 40:100mg / mL, the leachate pre-additive and municipal solid waste leachate were weighed respectively (the leachate was taken from a municipal solid waste landfill plant in Lianyungang, the leachate COD 2314mg / L, ammonia nitrogen 1875mg / L, Total phosphorus 64mg / L, zinc ion 28mg / L, copper ion 42mg / L), then pour the leachate pre-addition material and municipal solid wast...

Embodiment 3

[0049] Example 3 Effect of Iron Powder Addition on the Performance of the Soil Improver Prepared by Municipal Domestic Garbage Leachate

[0050] Preparation of soil conditioner: Weigh 10 parts, 12 parts, 14 parts, 15 parts, 20 parts, 25 parts, 21 parts, 23 parts, 25 parts of iron powder and 60 parts of humus, 12 parts of tuff, phosphogypsum 15 parts of aluminum powder and 15 parts of aluminum powder, and then mix humus, tuff, phosphogypsum, iron powder, and aluminum powder of corresponding quality, and stir evenly to obtain nine groups of leachate pre-additive materials. According to the solid-liquid ratio of 50:100mg / mL, the leachate pre-addition material and municipal solid waste leachate were weighed respectively (the leachate was taken from a municipal solid waste landfill plant in Lianyungang, the leachate COD 2314mg / L, ammonia nitrogen 1875mg / L, Total phosphorus 64mg / L, zinc ion 28mg / L, copper ion 42mg / L), then pour the leachate pre-addition material and municipal solid ...

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Abstract

The invention discloses an addition material which is prepared from the following components in parts by weight: 40-60 parts of humus, 8-12 parts of tuff, 5-15 parts of ardealite, 15-25 parts of ironpowder and 5-15 parts of aluminum powder. The invention further discloses a soil improver and a preparation method thereof. The soil improver prepared from municipal solid waste leachate, which is disclosed by the invention, is capable of not only eliminating negative functions of heavy metals and organic pollutants in the leachate upon soil, but also completely utilizing ammonium and phosphor salts in the leachate. In the preparation process, organic ferrous can be formed, and the content of bio-available iron in soil to be adjusted can be increased. The invention also provides a novel idea for harmless disposal and resource utilization of the municipal solid waste leachate.

Description

technical field [0001] The invention relates to the field of resource utilization of municipal solid waste leachate, in particular to an agricultural land soil iron supplement and a preparation method thereof. Background technique [0002] Municipal solid waste leachate refers to a kind of waste liquid with high concentration of organic matter and complex components produced by extrusion, microbial anaerobic fermentation and rain precipitation during the landfill (or stacking) process of municipal solid waste. Municipal solid waste leachate contains a large amount of toxic and harmful substances. If it is not properly treated and discharged directly, it will pollute the surrounding soil and water bodies and cause irreversible damage to the surrounding ecological environment. [0003] At present, the treatment technologies for municipal solid waste leachate mainly include adsorption method, flocculation sedimentation method, stripping-gas stripping method, advanced oxidation ...

Claims

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Application Information

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IPC IPC(8): C09K17/40C05G3/04C09K101/00
CPCC05D3/02C09K17/40C09K2101/00
Inventor 黄涛宋东平张树文刘龙飞周璐璐陶骏骏徐娇娇
Owner 浙江慧科环保科技有限公司