Microbial product for treating sandy soil polluted by heavy metals and manufacturing method thereof

Abstract

The invention discloses a microbial product for treating sandy soil polluted by heavy metals and a manufacturing method thereof. The microbial product comprises a nutritional matrix and target strains, wherein the nutritional matrix is a powdery nutritional matrix and includes a protein type low-cost plant base material, an energy type low-cost plant base material and a fiber type low-cost plant base material, the target strains are specifically tolerant strains polluting corresponding heavy metals, and the strains are aerobic strains and are preferably arthrobacterium strains. The manufacturing method comprises the manufacturing steps of preparing the nutritional matrix, culturing the target strains, preparing the microbial product and preserving the microbial product. The microbial product for treating the sandy soil polluted by heavy metals and the manufacturing method thereof are especially suitable for arid and barren sandy soil land polluted by heavy metals, the harm of heavy metal pollution can be reduced, meanwhile the fertility of the sandy soil land can be improved, and normal planting of crops during treatment is not affected.

Description

technical field [0001] The invention relates to the field of heavy metal prevention and control, in particular to a microbial product for treating heavy metal polluted sandy soil and a manufacturing method thereof. Background technique [0002] Heavy metal pollution in sandy soil has the characteristics of poor mobility of pollutants in the soil, long residence time, no natural degradation, dilution, and flow, and will become more and more enriched in the sandy soil as time goes on, endangering the plants grown in the sandy soil. In recent years, people have paid more and more attention to the problem of soil pollution. In order to reduce the pollution of heavy metals to soil, people have done a lot of research and developed various treatment technologies. One is activation, which mainly uses different means to increase the concentration of heavy metals in the soil. Mobility, which eventually removes heavy metals from the soil; the second is immobilization, which uses differ...

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Problems solved by technology

In a similar field, the patent "A Method for Microbial Remediation of Heavy Metal Contaminated Soil" (Application No.: 201110122739.6, Publication Date: 2011-11-16) discloses a method of soil treatment using Rhodobacter sphaericus preparations combined with flooding. The working principle is mainly to use Rhodobacter sphaericus to absorb heavy metals after multiplying in a large amount in a water-rich anaerobic environment, and then infiltrate into the ground through water to reduce the concentration of heavy metals in the soil. However, the soil cannot be used for planting operations during the treatment process, and the economic cost is high. On the other hand, it is not suitable for areas with water shortage and desertification, and the inflow of heavy metals into groundwater will also cause secondary pollution; -22) A heavy metal-contaminated soil remediation agent using Bacillus subtilis and Candida tropicalis as active ingredients is disclosed. Candida is an anaerobic fungus, which cannot survive for a long time in dry and ventilated soil. On the other hand, effective strains have not been acclimated to heavy metals, and their tolerance to heavy metals is poor, and the enrichment effect is not good, and Because each microbe has its limitations, its effect on soil treatment is neither long-lasting nor comprehensive