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Microorganism repair method of polluted soil and its restoration pile

A technology for microbial remediation and contaminated soil, applied in the field of environmental geotechnical engineering, can solve the problems of low diffusion rate and weakening of remediation fluid, and achieve the effect of easy control of injection volume, promotion of growth, and remediation of contaminated soil

Active Publication Date: 2016-01-13
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]Technical problem: The present invention provides a method that can ensure the full mixing of repair fluid and polluted soil, especially low-permeability polluted soil, and overcome the problem of repair fluid in low permeability. The problem of low diffusion rate in the soil, and can extend the repair depth to 10-50 meters underground, weaken the influence of groundwater level and complex stratum conditions on the construction process, and improve the effectiveness of microorganisms in repairing low-permeability deep-buried contaminated soil Method for repairing polluted soil and restoration pile thereof

Method used

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  • Microorganism repair method of polluted soil and its restoration pile
  • Microorganism repair method of polluted soil and its restoration pile
  • Microorganism repair method of polluted soil and its restoration pile

Examples

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Embodiment 1

[0039] A microbial repair pile repair method for benzene-contaminated sites. The site is leveled, guide grooves are used, the mixing drill is positioned on the hole position, the mixing drill is started, the drill bit sinks, the drill rod drives the stirring blades to rotate, and at the same time passes through the drill rod The liquid phase delivery pipe inside injects repair fluid into the soil. Start the motor of the stirring drilling rig, and when the drill bit sinks to the depth of the top surface of the polluted soil layer, turn on the hydraulic pump to inject the prepared repair fluid into the soil, and rotate the drill pipe while injecting the liquid. When the drill bit sinks to the design level, the drill bit Stop sinking. Lift the drill bit and drill pipe until the drill bit reaches the depth of the top surface of the contaminated soil layer, stop injecting repair fluid, continue to lift the drill bit and drill pipe out of the ground, and complete the construction of...

Embodiment 2

[0045] A microbial repair pile repair method for oil industry polluted sites. The site is leveled, guide grooves are used, the mixing drill is positioned on the hole position, the mixing drill is started, the drill bit sinks, the drill pipe drives the stirring blades to rotate, and at the same time passes through the drill pipe. The liquid phase delivery pipe injects repair fluid into the soil. Start the motor of the stirring drilling rig, and when the drill bit sinks to the depth of the top surface of the polluted soil layer, turn on the hydraulic pump to inject the prepared repair fluid into the soil, and rotate the drill pipe while injecting the liquid. When the drill bit sinks to the design level, the drill bit Stop sinking. Lift the drill bit and drill pipe until the drill bit reaches the depth of the top surface of the contaminated soil layer, stop injecting repair fluid, continue to lift the drill bit and drill pipe out of the ground, and complete the construction of a ...

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Abstract

The invention discloses a method for microbial restoration of polluted soil and a restoration pile thereof. The stirring technology and the microbial restoration technology are combined to form a pile for restoration and treatment of polluted sites. The pile body includes in-situ contaminated soil and restoration liquid. The construction process of the microbial repair pile includes: a. Leveling the site, measuring and setting out; b. Positioning the mixing rig, sinking the injection liquid and stirring; c. Lifting the injection liquid and stirring. The remediation fluid in the microbial remediation pile promotes the growth of microorganisms, and the microorganisms repair the contaminated soil in the microbial remediation pile; at the same time, the remediation fluid diffuses into the contaminated soil around the microbial remediation pile, and promotes the growth of microorganisms in the contaminated soil around the microbial remediation pile. The contaminated soil around the microbial remediation pile is remediated. The invention can be applied to microbial remediation of low-permeability polluted soil, can solve the problems of shallow remediation depth and low diffusion rate of gas and nutrients in low-permeability soil in the prior art, greatly improves the remediation efficiency, and shortens the Construction time.

Description

technical field [0001] The invention belongs to the technical field of environmental geotechnical engineering, and relates to a method for repairing polluted soil by microorganisms and repairing piles thereof. Background technique [0002] Contaminated soil remediation is divided into physical remediation, chemical remediation and biological remediation according to methods, and into in-situ remediation and ex-situ remediation according to implementation methods. Microbial remediation belongs to the field of bioremediation technology. It is a process of using indigenous microorganisms in the soil or injecting domesticated and efficient microorganisms into the contaminated soil to degrade organic pollutants in the soil or fix inorganic pollutants in the soil through the metabolic activities of the strains. Under suitable conditions, microorganisms can completely degrade toxic and harmful organic pollutants into non-toxic by-products - carbon dioxide, water, organic acids and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
Inventor 杜延军杨玉玲魏明俐
Owner SOUTHEAST UNIV
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