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Method for carrying out in-situ remediation on polluted ground water by chemical and biological combination reaction zone

A combined reaction and in-situ repair technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of large interference, tailing and rebound in the repair area, medium in the wall Problems such as difficulty in replacement

Inactive Publication Date: 2011-08-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it also has some limitations: ① When the non-aqueous solution appears, it is almost impossible to remove the non-aqueous solution due to capillary tension by pumping; ② The technology is expensive for excavation and treatment, and It involves the extraction or recharge of groundwater, which greatly interferes with the restoration area; ③If the pollution source is not closed, when the pumping is stopped, the phenomenon of tailing and rebound will be serious; ④Continuous energy supply is required to ensure the pumping of groundwater and the maintenance of the water treatment system operation, but also requires regular maintenance and monitoring of the system
However, the main problem of the permeable reactive wall is that it is difficult to replace the inactivated medium in the wall, and the problem of wall blockage is difficult to solve.
If it is to restore the polluted groundwater in the city cloth, the application of this technology will be limited by the density of the underground pipe network. In addition, if the groundwater beyond a certain depth is polluted, the application of the permeable reactive wall technology will also have certain difficulties.

Method used

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  • Method for carrying out in-situ remediation on polluted ground water by chemical and biological combination reaction zone
  • Method for carrying out in-situ remediation on polluted ground water by chemical and biological combination reaction zone

Examples

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Embodiment 1

[0032] ——Construction preparation stage:

[0033] a. Crush the iron filings to a particle size of 1.0 mm, then mix the iron filings and activated carbon in a volume ratio of 1:1, mix well and set aside;

[0034] B, prepare biofilm assembly, fix Pseudomonas corrugata (pseudomonas corrugata), Pseudomonas fluorescens (pseudomonas fluorescens), temperate acidovorax (Acidovorax temperans), Bacillus cereus ( Bacillus cereus) and Pseudomonas asplenii (Pseudomonas asplenii) mixed flora, mixed flora liquid pH=6, soaking temperature 10 ℃, soaking time is 4 days, load capacity is 4.22×10 12 pcs / g, prepared for later use;

[0035] c. Prepare the activated carbon loaded with nitrobenzene-degrading bacteria and aniline-degrading bacteria. First, wash the activated carbon with water to remove dust and then dry it. Adjust the pH of the nitrobenzene-degrading bacteria and aniline-degrading bacteria solution to 6. After cooling, the solid-to-liquid ratio is 2. : 1Kg / L into Pseudomonas corruga...

Embodiment 2

[0042] ——Construction preparation stage:

[0043] a. Crush the iron filings to a particle size of 1.5 mm, then mix the iron filings and activated carbon at a volume ratio of 1:1, and set aside after mixing;

[0044] B, prepare biofilm assembly, fix Pseudomonas corrugata (pseudomonas corrugata), Pseudomonas fluorescens (pseudomonas fluorescens), temperate acidovorax (Acidovorax temperans), Bacillus cereus ( Bacillus cereus) and Pseudomonas asplenii (Pseudomonas asplenii) mixed flora, mixed flora liquid pH=6, soaking temperature 10 ℃, soaking time is 4 days, load capacity is 4.22×10 12 pcs / g, prepared for later use;

[0045] c. Prepare the activated carbon loaded with nitrobenzene-degrading bacteria and aniline-degrading bacteria. First, wash the activated carbon with water to remove dust and then dry it. Adjust the pH of the nitrobenzene-degrading bacteria and aniline-degrading bacteria solution to 6. After cooling, the solid-to-liquid ratio is 2. : 1Kg / L into Pseudomonas cor...

Embodiment 3

[0052] ——Construction preparation stage:

[0053] a. Crush the iron filings to a particle size of 2.0 mm, then mix the iron filings and activated carbon at a volume ratio of 1:1, and set aside after mixing;

[0054] B, prepare biofilm assembly, fix Pseudomonas corrugata (pseudomonas corrugata), Pseudomonas fluorescens (pseudomonas fluorescens), temperate acidovorax (Acidovorax temperans), Bacillus cereus ( Bacillus cereus) and Pseudomonas asplenii (Pseudomonas asplenii) mixed flora, mixed flora liquid pH=6, soaking temperature 10 ℃, soaking time is 4 days, load capacity is 4.22×10 12 pcs / g, prepared for later use;

[0055] c. Prepare the activated carbon loaded with nitrobenzene-degrading bacteria and aniline-degrading bacteria. First, wash the activated carbon with water to remove dust and then dry it. Adjust the pH of the nitrobenzene-degrading bacteria and aniline-degrading bacteria solution to 6. After cooling, the solid-to-liquid ratio is 2. : 1Kg / L into Pseudomonas cor...

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Abstract

The invention relates to a method for carrying out in-situ remediation on polluted ground water by a chemical and biological combination reaction zone. A chemical reaction zone formed by chemical reaction well groups which are linearly arranged vertical to the direction of water flow is arranged on the downstream of a pollution source. A first biological reaction zone and a second biological reaction zone which are formed by biological reaction well groups are arranged on the downstream of the chemical reaction zone. Scrap iron and active carbon are filled in chemical reaction wells. Biological membrane components and active carbon for immobilizing nitrobenzene-degrading strains and aniline-degrading strains are arranged in biological reaction wells. The concentration of nitrobenzene in water flowing through the chemical reaction zone is obviously reduced and most of nitrobenzene is transformed or adsorbed by valent iron and active carbon within five days. After the biological reaction zones operate for 34 days, the concentration of residual aniline in yielding water of the biological well groups tends to be zero. The immobilized degrading strains in the biological reaction wells have very remarkable effect of degrading aniline. The treating effect for 140mg / L of nitrobenzene and 80.4mg / L of aniline of both the chemical and biological reaction zones reaches over 97 percent andthe method has good effect.

Description

Technical field: [0001] The invention relates to an in-situ restoration method for polluted groundwater, in particular to an in-situ restoration method for groundwater polluted by nitrobenzene and aniline. Background technique: [0002] At present, there are many kinds of groundwater pollution control technologies and restoration schemes, which can be summarized as follows: physical method, chemical method, and biological method; according to the treatment characteristics, the bioremediation method can be divided into ex-situ bioremediation method and in-situ bioremediation method and combined bioremediation. [0003] Physical method: The extraction treatment method is a traditional ex-situ remediation technology that is widely used at present. This technology is one of the earliest groundwater pollution remediation technologies, and it is also a representative technology of groundwater ex-situ remediation. Since groundwater pollution restoration was carried out in the 1980...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 张兰英刘娜任何军王显胜高松
Owner JILIN UNIV