Microbial in-situ remediation method of heavy metal contaminated soil

A technology of contaminated soil and in-situ remediation, applied in the field of contaminated soil treatment, can solve the problems of large environmental impact, long duration of microbial remediation, failure to become a measure for soil heavy metal pollution, etc., to reduce toxicity, improve transformation and degradation efficiency effect

Inactive Publication Date: 2014-10-01
TIANJIN DIGUAN TECH CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

However, the existing microbial remediation technology for heavy metal-contaminated soil has certain limitations, such as long duration of microbial remediation, slow effect, great impact on the environment, and not suitable for remediation of severely polluted soil, etc.
[0005] Studies have shown that a common factor limiting the process of mi

Method used

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Examples

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Embodiment Construction

[0028] The present invention is further described below through specific examples, and it should be noted that the following examples are illustrative rather than limiting. For those skilled in the art, on the premise of not departing from the spirit and scope of the present invention, various changes or modifications to the material components and dosages in these embodiments also fall within the protection scope of the present invention.

[0029] A microbial in-situ remediation method for heavy metal-contaminated soil, the steps of which are:

[0030] (1) Bacteria culture: Select non-pathogenic bacterial communities and heterotrophic microbial communities that can transform heavy metal characteristics, microbial degrading bacterial colonies 1 Kg, adopt solid culture methods, use wheat bran as a carrier for cultivation and domestication, and take the intermediate bacterial products and mix them and the powdery substance formed after drying;

[0031] (2) Bacterial flora activ...

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PUM

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Abstract

The invention relates to a microbial in-situ remediation method of heavy metal contaminated soil. The method comprises the following steps: (1) flora culture; (2) flora activation; (3) microbial growth agent preparation; (4) nutrient solution preparation; (5) primary pouring; and (6) remediation. According to the microbial in-situ remediation method of heavy metal contaminated soil, heavy metal microbial degradation floras and a microbial growth accelerator serve as the main ingredients, certain microbial nutrients are replenished and the microbial growth accelerator is added to promote high speed reproduction of heavy metal microbial transformation floras while preferably putting the heavy metal microbial transformation floras in the soil, thus greatly improving the transformation and degradation efficiency of the heavy metal elements in the soil, solving the problems of long time and slowness in effect taking in a microbial in-situ remediation method of heavy metal contaminated soil and enabling the microbial in-situ remediation technology to become the reliable, efficient and operable heavy metal contaminated soil control means.

Description

technical field [0001] The invention belongs to the field of contaminated soil treatment and relates to microbial in-situ remediation, in particular to a microbial in-situ remediation method for heavy metal polluted soil. Background technique [0002] Soil pollution is caused by human activities that cause the content of certain harmful components to be significantly higher than the original content of the soil and exceed the self-purification capacity of the soil, which causes changes in the composition, structure and function of the soil, and harmful substances or their decomposition products are released in the soil. Gradually accumulate and reach the level of endangering human health. Among them, soil heavy metal pollution is one of the most prominent soil pollution problems, which mainly come from sewage irrigation, industrial waste residue, urban garbage, industrial waste stacking and atmospheric deposition. Soil heavy metal pollution mainly includes mercury (Hg), cad...

Claims

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Application Information

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IPC IPC(8): B09C1/10
Inventor 李臻李斌周昊
Owner TIANJIN DIGUAN TECH CO LTD
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