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Bioremediation system for organic contaminated site

A technology for bioremediation and organic pollution, applied in the restoration of polluted soil, etc., can solve the problems of inapplicability, high cost of inoculum, difficult to realize the movable and assembling of restoration equipment, etc.

Inactive Publication Date: 2020-06-09
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, bioremediation has the advantages of high degradation efficiency, strong bioavailability, no secondary pollution, low repair cost, and no damage to soil structure and composition, but it is not suitable for soils contaminated by heavy metals and refractory organic substances, and it is not suitable for clay, etc. Low permeability soil, and the repair period is often long
[0003] What is important is that in domestic and foreign restoration practices, especially in domestic restoration practices, first of all, the equipment level of bioremediation technology is significantly lower than that of thermal desorption, leaching and other restoration technologies, and it is not easy to realize the mobility of restoration equipment in different restoration sites , can be assembled; secondly, the nutrients, electron acceptors (H 2 o 2 etc.), surfactants, etc. need to be equipped with solutions on site, which objectively requires equipment; thirdly, the bioaugmentation method requires the source of super strains and the preparation of bacterial liquids and injecting them into the ground, which also requires equipment, and remote control from other strain source manufacturers It is laborious and laborious to transport to the restoration site, and it is necessary to pay a high cost of bacterial agents, which will only increase the restoration cost

Method used

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  • Bioremediation system for organic contaminated site
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specific Embodiment

[0042] Such as figure 1 , figure 2 As shown, a bioremediation system for organic polluted sites, including: mixing and stirring module, oil removal and sedimentation water purification module, enrichment and concentration module, bacterial agent / nutrient solution / mixed matrix injection module (pump), biological ventilation / biological stack module , PLC intelligent control module, bioremediation database module.

[0043] The mixing and stirring module is used to mix the available water sources such as polluted soil, lake water and river water, and the reused water treated by the biopile system, and fully stir to make the indigenous degrading bacteria contained in the polluted soil and some pollutants in the soil enter the water body, wherein the soil water The ratio should not be greater than 2:1. These indigenous microorganisms have better tolerance and adaptability under the conditions of the polluted site, and their ability to degrade the site pollutants is stronger.

[...

Embodiment 1

[0054] The area of ​​polluted soil in a certain site is small, the pollution is light, the soil has good water permeability, and the pollutants are volatile to a certain extent, requiring in-situ treatment. Digging, and thus choose the biological ventilation system. During this period, the system of the present invention is arranged in the polluted site, and the diameter of the operating well in this area needs to be limited to 60-150mm, and the depth is 1-10m. First, take a certain amount of polluted soil (100g ~ 10000g) and water source into the mixing and stirring module, after the degreasing and sedimentation water purification module, it is passed into the enrichment and concentration module, during which the dominant bacteria, nutrient solution and mixed matrix are introduced to enrich and cultivate microorganisms for 15 After ~30 days, slowly pump into the soil layer of the biological ventilation system. During this period, the injection well continuously feeds air and ...

Embodiment 2

[0056] A polluted site has a high concentration of pollutants, is difficult to degrade, has a large scale, and requires a short construction period. Therefore, it chooses to repair in situ. For the filtrate collection pipeline, take a certain amount of polluted soil (1000g~10000g) and water source and add it to the mixing and stirring module. After cultivating microorganisms for 15-30 days, slowly pump them into the biopile system (continuous spraying), control the soil water holding rate between 70% and 90%, control the pH between 6.5 and 8.0, and control the oxygen content of the pile at 7% and Above, the microbial content is not less than 10 5 During this period, excess water is passed into the water purification device through the leachate collection pipeline, and after treatment, it flows back to the mixing module. The gas is pumped to the air purification system through the exhaust system, and is discharged to the air after the treatment reaches the standard.

[0057] T...

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Abstract

The invention discloses a bioremediation system for an organic contaminated site. The system comprises a mixing and stirring module, an oil removal, precipitation and water purification module, an enrichment and concentration module, a microbial inoculum / nutrient solution / mixed matrix injection module, a biological ventilation module, a biological reactor module, a PLC intelligent control module and a bioremediation database module; a reuse water outlet of the biological pile module is connected with the mixing and stirring module, the mixing and stirring module is provided with an available water source and a contaminated soil inlet, and the enrichment and concentration module is provided with a nutrient substance and dominant bacterium adding port. Two schemes of in-situ remediation (mainly adopting a biological ventilation technology) and ex-situ remediation (mainly adopting a biological reactor technology) can be freely selected according to site requirements; the problems of intelligence, low equipment degree, high microbial inoculum cost and the like in the bioremediation practice of the organic contaminated site are solved, and intelligent decision suggestions in the designand implementation process can be provided for bioremediation engineering in real time.

Description

technical field [0001] The invention relates to an organic polluted site restoration technology, in particular to a bioremediation system for an organic polluted site. Background technique [0002] The remediation technologies applicable to organically polluted sites mainly include redox, thermal desorption, leaching, and biology. Among them, bioremediation has the advantages of high degradation efficiency, strong bioavailability, no secondary pollution, low repair cost, and no damage to soil structure and composition, but it is not suitable for soils contaminated by heavy metals and refractory organic substances, and it is not suitable for clay, etc. Low permeability soil, and the repair period is often long. [0003] What is important is that in domestic and foreign restoration practices, especially in domestic restoration practices, first of all, the equipment level of bioremediation technology is significantly lower than that of thermal desorption, leaching and other re...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/10
Inventor 桑义敏艾贤军张金婷王飞宇朱玲陈家庆
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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