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Method for preparing ecologically improved substrate based on coal gangue and sludge

A coal gangue and sludge technology, applied in the field of solid waste resource utilization, can solve environmental risks and other problems, achieve the effects of improving physical and chemical properties, improving soil fertility, and improving soil physical and chemical properties

Active Publication Date: 2020-04-17
北京优生基生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of a certain amount of heavy metals in coal gangue and sludge, there is still an environmental risk of heavy metals when used as a soilless lawn substrate.

Method used

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  • Method for preparing ecologically improved substrate based on coal gangue and sludge
  • Method for preparing ecologically improved substrate based on coal gangue and sludge
  • Method for preparing ecologically improved substrate based on coal gangue and sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of embodiment 1 sludge compost

[0025] The pruned branches of garden trees are crushed into particles below 2cm. The newly generated sludge from the sewage treatment plant is dehydrated. If the rice husk is replaced with mushroom dregs, it is necessary to remove the mushroom sticks from the bag while they are still fresh and crush the corn stalks to a particle size below 3cm), and the sludge composting backmixing material is the previous sludge composting left over decomposed material. Each raw material is calculated by weight, 15 parts of garden tree pruning branches crushed matter, 70 parts of fresh dewatered sludge, 8 parts of rice husk, 7 parts of sludge composting backmixing material, microbial composting decomposing agent (produced by Henan Nongfukang Biotechnology Co., Ltd.) Add 0.1kg per ton of material. Microbial compost decomposing agent is pre-cultivated by adding 3 kg of rice bran and 10 liters of water per kg of bacterial agent for 4-6 ho...

Embodiment 2

[0031] Embodiment 2 is resistant to heavy metal growth-promoting bacterium preparation and the tolerance to heavy metal

[0032] The heavy metal-resistant growth-promoting bacteria agent of the present invention includes the following microorganisms: Acinetobacter sp. NXH1, Klebsiella sp. NXH2, Stenotrophomonas sp. NXH3 and Pseudomonas sp. Bacteria (Pseudomonas sp.) XKS were all preserved on August 23, 2016 in the General Microbiology Center of the China Committee for the Collection of Microbial Cultures (CGMCC for short) (unit address: Courtyard 3, No. 1 Beichen West Road, Chaoyang District, Beijing No., zip code: 100101), its preservation numbers are respectively CGMCC.12895, CGMCC.12896, CGMCC.12897, CGMCC.12894, 5 strains of bacteria are respectively inoculated with beef extract peptone medium at an inoculum size of 10%, and 30 Cultivate on a shaking table at ℃, cultivate Acinetobacter and Stenotrophomonas for 72 hours, and cultivate Klebsiella and Pseudomonas for 48 hours...

Embodiment 3

[0036] The preparation of embodiment 3 ecological improvement matrix

[0037] According to the mass ratio, take 60 parts of coal gangue particles crushed below 4 meshes, 30 parts of sludge compost, and 10 parts of fly ash and mix them fully with a forklift or shaker truck. While mixing, spray water on the top of the materials to prevent and control dust. Spray 0.2 parts of the heavy metal-tolerant growth-promoting agent fermentation liquid evenly on the mixed material with a sprayer, then stir and mix, then cover the surface of the substrate with a black plastic film, and leave it for 2 weeks to mature without stirring during the period, that is, To obtain the ecological improvement substrate, in order to compare the effect of the bacterial agent, the treatment without adding the mixed bacterial agent was done at the same time, and the other preparation materials and processes were exactly the same. Two kinds of matrices were taken to measure heavy metal content and microbial ...

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Abstract

The invention discloses a method for preparing ecologically improved substrate based on coal gangue and sludge, and aims to solve the problem of resource utilization of coal gangue and sludge. The present invention comprises steps of crushing the coal gangue, composting the sludge, adding fly ash and heavy metal-tolerant growth-promoting microbial agent to the mixture of the crushed coal gangue and the sludge compost, and placing the mixture for 2 weeks to obtain the cured ecologically improved substrate. According to the present invention, addition of the sludge compost can release inert nutrients from the coal gangue, the microbial agent can control the risk of heavy metals in the sludge and the coal gangue, and the mixing of the coal gangue and the sludge compost improves physical and chemical properties and microbial indicators for the substrate, and forms the ecologically improved substrate similar to soil, thereby promoting the growth of plants. Ultimately the resource utilization of coal gangue and sludge is realized.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of solid waste, and in particular relates to a method for preparing an ecological improvement matrix based on coal gangue and sludge. Background technique [0002] Coal gangue is a kind of solid waste produced in the process of coal mining and coal washing. It is also a recyclable resource, and its output is equivalent to 10%-15% of coal output. The large accumulation of coal gangue will pollute the soil and groundwater under the action of leaching; the spontaneous combustion of coal gangue will also produce a large amount of smoke, sulfide and nitrogen oxides, polluting the air. However, at the same time, coal gangue contains a certain amount of organic matter, phosphorus, potassium and various trace elements, and has certain porosity, air permeability, and water retention properties. It has been used in the preparation of reclamation filling matrix and soil in coal mining subsidence...

Claims

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Application Information

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IPC IPC(8): A01G24/17A01G24/10A01G24/25A01G24/22A01G24/20C05G3/80C05G3/00
CPCA01G24/10A01G24/17A01G24/20A01G24/22A01G24/25C05D9/02C05G3/00
Inventor 周金星秦琪焜乔浩亮彭霞薇
Owner 北京优生基生态科技有限公司
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