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Preparation method of artificial wetland filling medium for treating coal mine wastewater

A technology of artificial wetland and filling matrix, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems that the technology cannot be realized, achieve high hardness and strength, and facilitate construction Effect

Inactive Publication Date: 2019-05-21
山西省林业科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large amount of coal gangue is utilized as a resource, it will not only solve the problem of land occupation by gangue hills, but also increase the channels of resources. It can be said to be a good way to kill two birds with one stone, but the current technology is not yet possible.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a constructed wetland filling matrix for controlling coal mine wastewater. The mass fraction ratio of raw materials is as follows: 20% of in-situ soil with a particle size of 0.5mm, 20% of coal gangue with a particle size of 30mm, and 10% of a particle size of 8mm Straw, corn stalk or humus wood, 15% class I fly ash or class II fly ash, 10% peat, 2% water retaining agent and 1.0×109 / ml rhizobium bacteria liquid.

[0021] The preparation steps of the constructed wetland filling matrix are as follows:

[0022] Step 1: Add 20% of in-situ soil with a particle size of 0.5mm, 20% of coal gangue with a particle size of 30mm, 10% of straw with a particle size of 8mm, corn stalks or humus wood, and 15% of Class I fly ash or Grade II fly ash, 10% peat, 2% water retaining agent and 1.0×109 / ml Rhizobium bacteria liquid are stirred evenly to form a mixture, and clay is used as a binder;

[0023] Step 2: Fill the mixture into a mold that is simply combined, an...

Embodiment 2

[0026] A method for preparing a constructed wetland filling matrix for treating coal mine wastewater. The mass fraction ratio of raw materials is as follows: 25% of in-situ soil with a particle size of 1.5mm, 27.5% of coal gangue with a particle size of 20mm, and 7.5% of a particle size of 9mm Straw, corn stalk or humus wood, 10% class I fly ash or class II fly ash, 7.5% peat, 1.5% water retaining agent and 1.0×109 / ml rhizobium bacteria liquid.

[0027] The preparation steps of the constructed wetland filling matrix are as follows:

[0028] Step 1: Add 25% of in-situ soil with a particle size of 1.5mm, 27.5% of coal gangue with a particle size of 20mm, 7.5% of straw with a particle size of 9mm, corn stalks or humus, 10% of Class I fly ash or Grade II fly ash, 7.5% peat, 1.5% water retaining agent and 1.0×109 / ml Rhizobium bacteria liquid are stirred evenly to form a mixture, and clay is used as a binder;

[0029] Step 2: Fill the mixture into a mold that is simply combined, an...

Embodiment 3

[0032] A method for preparing a constructed wetland filling matrix for treating coal mine wastewater. The mass fraction ratio of raw materials is as follows: 25% of in-situ soil with a particle size of 1mm, 27.5% of coal gangue with a particle size of 20mm, and 7.5% of straw with a particle size of 8mm , corn stalk or humus wood, 10% grade I fly ash or grade II fly ash, 7.5% peat, 1.5% water retaining agent and 1.0×109 / ml rhizobium bacteria liquid.

[0033] The preparation steps of the constructed wetland filling matrix are as follows:

[0034] Step 1: Combine 25% of in-situ soil with a particle size of 1mm, 27.5% of coal gangue with a particle size of 20mm, 7.5% of straw, corn stalks or humus wood with a particle size of 8mm, and 10% of Class I fly ash or II Grade fly ash, 7.5% peat, 1.5% water-retaining agent and 1.0×109 / ml Rhizobium bacteria liquid are stirred evenly to form a mixture, and clay is used as a binder;

[0035] Step 2: Fill the mixture into a mold that is simp...

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Abstract

The invention discloses a preparation method of an artificial wetland filling medium for treating coal mine wastewater. The medium is prepared from, by mass, 20-30% of local soil with the particle size of 0.5-1.5 mm, 20-35% of coal gangue with the particle size of 10-30 mm, 5-10% of straw, corn stalk or humus wood with the particle size smaller than 10 mm, 5-15% of grade-I pulverized fuel ash or grade-II pulverized fuel ash, 5-10% of peat, 1-2% of a water retention agent and a 1.0*10<9> / ml rhizobium bacterial liquid. The preparation method comprises the following steps that the local soil, thecoal gangue, the straw, the corn stalks or humus wood, the grade-I pulverized fuel ash or grade-II pulverized fuel ash, the peat, the water retention agent and the rhizobium bacterial liquid are uniformly stirred to form a mixed material; the mixed material fills a simple-combined mold, and the artificial wetland filling medium is prepared through natural shaping. The prepared artificial wetlandfilling medium for treating the coal mine wastewater is high in hardness and strength, construction is facilitated, gravels and sand in traditional artificial wetland can be replaced, existing materials are fully utilized, and the function of sewage purification is achieved.

Description

technical field [0001] The invention relates to the technical field of coal mine wastewater treatment materials, in particular to a method for preparing a constructed wetland filling matrix for treating coal mine wastewater. Background technique [0002] Constructed wetland is a new type of sewage treatment technology developed in the 1970s. It generally consists of artificially filled substrates and aquatic plants growing on it. It is a unique soil-plant-microbe ecosystem. It simulates the natural wetland system, and treats various wastewater through the synergy of chemical, physical, and biochemical reactions, and has a strong ability to treat organic matter. Studies have shown that when the influent concentration is low, the removal rate of COD in constructed wetlands is greater than 80%, and the removal rate of BOD can reach 85%-95%, which has become an effective method to improve the water quality of large water bodies. [0003] Constructed wetlands are generally compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
Inventor 程丽芬樊兰英张欣韩莉春周长东赵平高俊臣郑峰张帅
Owner 山西省林业科学研究院
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