Mining area soil remediation agent and preparation method and application thereof

A soil remediation agent and technology for mining areas, applied in the field of soil remediation, can solve problems such as poor long-term remediation effect, regional soil alkalization, and inability to achieve soil remediation in mining areas, so as to improve the ability to resist diseases and insect pests, promote plant growth, and improve plant disease resistance. effect of ability

Active Publication Date: 2020-11-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned remedial agents can easily lead to alkalization of the soil in the area, and the long-term remediation effect is poor, and the remediation of the soil in the mining area cannot be realized.

Method used

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  • Mining area soil remediation agent and preparation method and application thereof
  • Mining area soil remediation agent and preparation method and application thereof
  • Mining area soil remediation agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of decomposed sludge: Dewatering municipal domestic sludge to obtain dewatered sludge with a water content of 65%, mixed with corn stalks, wood chips and mushroom slag at a mass ratio of 1:0.5:0.5. Mix evenly at a ratio of 1:1, pile into a conical shape, the bottom diameter is about 1.5m, and the height is about 1m. Aeration pipes are buried at an equidistant distance of about 0.3m from the bottom of the pile, and the end of the pipe is connected to the aeration head for aeration. The volume is 4L / min, and wireless temperature sensors are embedded at equal distances from the bottom, middle, and top of the pile, and the detection time interval is set to 5min to detect the temperature of the pile in real time. When the temperature in the middle of the pile reaches 65°C, add CFU Bacillus stearothermophilus and Sporosporium thermophila at a ratio of 1:1 were composted and fermented at a temperature of 65-70°C for 8 days to obtain decomposed sludge.

[0035] Prep...

Embodiment 2

[0042] Preparation of decomposed sludge: Dewatering municipal domestic sludge to obtain dewatered sludge with a water content of 65%, mixed with corn stalks, wood chips and mushroom slag at a mass ratio of 1:0.8:0.3. Mix evenly at a ratio of 1:0.8, pile into a conical shape, the bottom diameter is about 1.5m, and the height is about 1m. Aeration pipes are buried equidistantly from the bottom of the pile about 0.3m, and the end of the pipe is connected to the aeration head for aeration. The volume is 4L / min, and wireless temperature sensors are embedded equidistantly at the bottom and middle top of the pile. The detection time interval is set to 5min, and the temperature of the pile is detected in real time. When the temperature in the middle of the pile reaches 65°C, the ratio of adding CFU Bacillus stearothermophilus and Sporosporium thermophila at a ratio of 1:1.2 were composted and fermented at a temperature of 65-70°C for 7 days to obtain decomposed sludge.

[0043] Get th...

Embodiment 3

[0047] Preparation of decomposed sludge: Dewatering municipal domestic sludge to obtain dewatered sludge with a water content of 65%, mixed with corn stalks, wood chips and mushroom slag at a mass ratio of 1:0.6:0.4. Mix evenly at a ratio of 1:1.2, pile it into a conical shape, the bottom diameter is about 1.5m, and the height is about 1m. Aeration pipes are buried equidistantly at about 0.3m from the bottom of the pile, and the end of the pipe is connected to the aeration head for aeration. The volume is 4L / min, and wireless temperature sensors are embedded equidistantly at the bottom and middle top of the pile. The detection time interval is set to 5min, and the temperature of the pile is detected in real time. When the temperature in the middle of the pile reaches 65°C, the ratio of adding CFU Bacillus stearothermophilus and Sporosporium thermophila at a ratio of 1:0.8 were composted and fermented at a temperature of 65-70°C for 10 days to obtain decomposed sludge.

[0048]...

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Abstract

The invention relates to the field of soil remediation, in particular to a mining area soil remediation agent and a preparation method and application thereof. The mining area soil remediation agent is prepared through the following steps: carrying out the aeration fermentation heating and thermophilic microbial agent fermentation on sludge to obtain decomposed sludge, enriching bacteria from plant root soil naturally growing in a lead-zinc mining area, and carrying out the selective culture on the enriched bacteria through a selective culture medium containing rhizosphere soil leaching liquorto obtain aninoculant with the resistance to the heavy metal, and carrying out the propagation to obtain a phosphate solubilizing bacteria agent; and mixing the decomposed sludge and the phosphate-solubilizing microbial inoculum in proportion to obtain the mining area soil remediation agent. According to the invention, on the one hand, soil can be improved, a remediation layer conforming to preparation and growth is constructed; on the other hand, all the components have a synergistic effect, so the seed germination rate in the remediation process is increased, vegetation growth is promoted,and the plant disease and insect pest resistance is improved.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to a soil remediation agent for mining areas and its preparation method and application. Background technique [0002] The mining process destroys the ecological environment and causes environmental pollution. Large areas of the mining area are destroyed, the topsoil is peeled off, and the soil erosion is serious. The soil contains a large amount of toxic and harmful substances such as heavy metal ions, which has a serious impact on the surrounding areas. [0003] In the prior art, the restoration of soil in mining areas is mainly obtained by composting and fermenting some agricultural waste and animal manure to obtain restoration agents, for example, by turning over the soil on the mine, breaking it and drying it in the sun, and adding attapulgite, apatite, pulverized coal ash, quicklime, straw and other base materials, and ammonium polyacrylate, slow-release fertilizer and other ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08B09C1/10B09C1/00A01B79/02C09K101/00
CPCC09K17/40B09C1/08B09C1/105B09C1/10B09C1/00A01B79/02C09K2101/00Y02W30/40
Inventor 孟德龙尹华群刘学端
Owner CENT SOUTH UNIV
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