Method for degrading polycyclic aromatic hydrocarbon and polychlorocarbon pollutants in soil

A technology of polycyclic aromatic hydrocarbons and polychlorinated hydrocarbons, which is applied in the field of degrading polycyclic aromatic hydrocarbons and polychlorinated hydrocarbon pollutants in soil, and can solve the problems of complex soil biology, long cycle and difficult regulation

Inactive Publication Date: 2015-04-29
KESHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microbial remediation can use the indigenous flora to enhance the decomposition ability of the flora by providing oxygen or adding nutrient sources, or directly injecting foreign aid microorganisms into the polluted environment to enhance the restoration effect, but although the native flora has a greater decomposition potential, However, due to the complexity of soil biology, it is difficult to control, and it is difficult to maintain high activity of exogenous engineered bacteria in the soil, which is also limited in practical application.
Planting plants to absorb and digest pollutants has no significant effect on insoluble solid organic matter, and the whole cycle is longer

Method used

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  • Method for degrading polycyclic aromatic hydrocarbon and polychlorocarbon pollutants in soil
  • Method for degrading polycyclic aromatic hydrocarbon and polychlorocarbon pollutants in soil
  • Method for degrading polycyclic aromatic hydrocarbon and polychlorocarbon pollutants in soil

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Embodiment Construction

[0016] Such as figure 1 Shown is the schematic diagram of the principle of the present invention. First of all, a certain amount of water needs to be injected into the polluted soil and stirred into mud. If the mud or water sludge is to be treated, it can be directly put into the treatment tank for stirring. Add phosphate buffer to adjust the pH to 4.0-6.0, preferably 5.0. In addition, a certain amount of yeast extract needs to be added as a nutrient source for microorganisms. The added microorganisms were a mixture of Alcaligenes and Pseudomonas. After a period of biological reaction, the pH value will increase slightly, but generally its pH value is not higher than 5.5. At this time, there is no need to adjust the pH value, and Fenton’s reagent can be directly added to the reactant, and after adding Fenton’s reagent, the mud The pH of the mixture can be slightly lowered. But if the pH value is higher than 5.5 at this time, it is necessary to add diluted hydrochloric aci...

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Abstract

The invention relates to a technology for polluted soil restoration. Pollutants in soil mainly comprise polycyclic aromatic hydrocarbons and polychlorocarbons. In a biological-chemical-biological treatment restoration order, the pollutants are degraded under suitable conditions.

Description

technical field [0001] The invention mainly relates to the restoration technology of soil, sediment, sludge and mud containing organic solid pollutants, and the organic solid pollutants include polycyclic aromatic hydrocarbons and polychlorinated hydrocarbons. This process usually involves three process steps: aerobic biodegradation, chemical oxidation, and microbial aerobic digestion. Background technique [0002] Soil is a very complex multi-phase system. After pollutants enter the soil, the concentration of pollutants is reduced through dilution, diffusion and migration; the form and toxicity of pollutants are changed through acid-base reactions or redox reactions, or pollutants are The surface of the colloid is adsorbed or coagulated to be held, or degraded, absorbed and transformed by organisms or microorganisms. Therefore, the soil has a certain ability to accept and buffer external pollutants, and soil pollution is often not easy to be found intuitively. Polycyclic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10B09C1/08
Inventor 曹惠忠李卓坪
Owner KESHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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