Microbial remediation agent based on bacterial strain 1JN2, and preparation and application methods thereof

Abstract

The invention relates to a microbial remediation agent based on a bacterial strain 1JN2. The microbial remediation agent comprises the following raw materials in parts by weight: 12-15 parts of biochar, 3-6 parts of a silkworm excrement organic fertilizer, 3-5 parts of a composite microbial agent, 0.5 to 1 part of amino acid, 0.5 to 1 part of a biological growth promoter and 0.5-1 part of a slow release oxidant, wherein the composite microbial agent comprises a stress-resistant strain 1JN2 and EM bacteria. The microbial remediation agent is prepared through the following steps: respectively preparing two microbial agents, mixing two microbial agents with the biochar for fermentation, and mixing an obtained material with the silkworm excrement organic fertilizer, the amino acid, the biological growth promoter and the slow release oxidant. The application method comprises the following steps: spreading the microbial remediation agent based on the bacterial strain 1JN2 onto the surface layer of to-be-treated soil, deeply ploughing the soil to a depth of 500 mm by using an excavator, respectively ploughing the soil twice in a longitudinal direction and a transverse direction, and covering the soil with a layer of thin sandy soil. With the microbial remediation agent based on the bacterial strain 1JN2, and the preparation method and the application method thereof in the above-mentioned technical scheme of the invention, the problem of heavy metal pollution of the soil can be fundamentally solved; and the preparation method is simple and convenient, has low cost and facilitates large-scale production and preparation.

Description

technical field

[0001] The invention relates to the technical field of microbial remediation agents, in particular to a microbial remediation agent for treating heavy metal-contaminated soil, a preparation method and a use method thereof. Background technique

[0002] Soil heavy metal pollution has become one of the important global environmental problems. Once the land is polluted by heavy metals, it will lose its productive capacity to a certain extent. For soil pollution treatment, the biggest disadvantage of traditional physical and chemical remediation technologies is that the removal of pollutants is not complete, which easily leads to secondary pollution, which brings a certain degree of environmental health risks. Bioremediation of different types of contaminated soils by using microorganisms has become one of the hotspots in microbial research. Microbial remediation refers to the bioremediation technology that uses naturally occurring or cultivated functional micro...

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