Chemical method for microbial clogging treatment in artificial recharging process

A chemical method and microbial technology are applied in the field of microbial blockage control in the process of artificial recharge, which can solve the problems of low recharge rate, microbial blockage, and high equipment maintenance cost, achieve less dosage, low cost, and improve recharge efficiency. Effect

Pending Publication Date: 2019-04-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and provide a chemical method for the treatment of microbial blockage in the artificial recharge process, which has the advantages of prolongi...

Method used

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  • Chemical method for microbial clogging treatment in artificial recharging process
  • Chemical method for microbial clogging treatment in artificial recharging process
  • Chemical method for microbial clogging treatment in artificial recharging process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1): After the medium is blocked (the permeability coefficient is reduced to the initial 0.01%), the chlorine dioxide solution of 0.1mg / L is passed into the experimental sand column from top to bottom at a speed of 5m / d.

[0050] (2): Continuously inject 100ml of chlorine dioxide solution, then stop injecting and let it stand for 12 hours.

[0051] (3): After 12 hours, start to feed ultrapure water into the experimental sand column at a speed of 5m / d.

[0052] (4): According to the recovery of the permeability coefficient, intermittently inject 0.1 mg / L chlorine dioxide solution into the sand column for 4 times, rinse with ultrapure water, and the permeability coefficient of the porous medium will recover to 60% of the initial permeability coefficient in 5 days .

Embodiment 2

[0054] (1): After the medium is blocked (the permeability coefficient is reduced to the initial 0.01%), the chlorine dioxide solution of 0.5mg / L is passed into the experimental sand column from top to bottom at a speed of 5m / d.

[0055] (2): Continuously inject 100ml of chlorine dioxide solution, then stop injecting and let it stand for 12 hours.

[0056] (3): After 12 hours, start to feed ultrapure water into the experimental sand column at a speed of 5m / d.

[0057] (4): According to the restoration of permeability coefficient, 0.5 mg / L chlorine dioxide solution was intermittently passed into the sand column for 7 times, and washed with ultrapure water. The permeability coefficient of the porous medium recovered to 74% of the initial permeability coefficient in 5 days. .

Embodiment 3

[0059] (1): After the medium is blocked (the permeability coefficient is reduced to the initial 0.01%), the chlorine dioxide solution of 0.8mg / L is passed into the experimental sand column from top to bottom at a speed of 5m / d.

[0060] (2): Continuously inject 100ml of chlorine dioxide solution, then stop injecting and let it stand for 12 hours.

[0061] (3): After 12 hours, start to feed ultrapure water into the experimental sand column at a speed of 5m / d.

[0062] (4): According to the restoration of the permeability coefficient, intermittently inject 0.8 mg / L chlorine dioxide solution into the sand column for 4 times, rinse with ultrapure water, and the permeability coefficient of the porous medium returns to 82% of the initial permeability coefficient in 5 days .

[0063] current technology

[0064] Most of the existing microbial blockage treatment methods are replacing the surface medium and adding hydrolytic enzymes. The formula for solution preparation is to inject h...

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Abstract

The invention discloses a chemical method for microbial clogging treatment in an artificial recharging process, and relates to the technical field of microbial clogging treatment. The chemical methodfor the microbial clogging treatment in the artificial recharging process has the advantages that chlorine dioxide is utilized to control microbial clogging in the recharging process, and the effectson prolonging the service life of a recharging facility, reducing the equipment maintenance cost and improving recharging efficiency are positive, a bactericide chlorine dioxide solution can rapidly oxidize and destroy tyrosine in bacterial protein capsid to inhibit the specific adsorption of bacteria, the chlorine dioxide solution reacts with some amino acids in bacteria and other microbial proteins to control the synthesis of microprotein and ultimately leads to the death of the bacteria, the method can be used multiple times for a long time under the condition of meeting the drinking waterstandard, the aquifer and a recharging well system cannot be destroyed, the groundwater quality cannot be adversely affected, the adding dose is small, the cost is low, the unblocking effect is good,and the effect is quick.

Description

technical field [0001] The invention relates to the technical field of microbial blockage control, in particular to a chemical method for microbial blockage control in an artificial recharge process. Background technique [0002] Although artificial groundwater recharge has many advantages, this method has not been fully recognized in the allocation of urban water resources. One of the important reasons is the blockage of the aquifer generated during the recharge process. A large number of engineering practices have shown that due to the incompatibility between the water quality of the recharge water and the target aquifer, the recharge water contains a large number of microorganisms such as algae and bacteria. Channels and pore throats lead to a decrease in their permeability and blockage of the recharge system, which seriously affects the recharge efficiency and the maintenance cost and service life of the equipment. [0003] At present, the treatment of clogging in artif...

Claims

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Application Information

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IPC IPC(8): C02F1/50
CPCC02F1/50
Inventor 冶雪艳崔瑞娟杜新强
Owner JILIN UNIV
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