Microbial powder product for treating heavy metal contaminated drought soil and manufacture method thereof

Abstract

The invention discloses a microbial powder product for treating heavy metal contaminated drought soil and a manufacture method thereof. The powder product comprises 50-70 parts of bacterium-containing corn powder, 15-25 parts of bacterium-containing rice bran powder, 10-20 parts of bacterium-containing peanut meal powder, and 5-10 parts of bacterium-containing bean cake powder. Arthrobacter bacteria are cultured in the bacterium-containing corn powder and have the bacteria concentration of 10 billion cfu / g-20 billion cfu / g. Bacillus subtilis are cultured in the rice bran powder and have the bacteria concentration of 5 billion cfu / g-20 billion cfu / g. White-rot fungi are cultured in the bacterium-containing peanut meal powder and have the fungi concentration of 1 billion cfu / g-10 billion cfu / g. Brevibacillus laterosporus are cultured in the bacterium-containing bean cake powder and have the bacterial concentration of 5 billion cfu / g-20 billion cfu / g. The invention also discloses a manufacture method of a bacterial powder product. The bacterial powder product of the present invention is suitable for dry heavy metal contaminated soil.

Description

technical field [0001] The invention relates to the field of heavy metal prevention and control, in particular to a microbial powder product for treating heavy metal polluted dry soil and a manufacturing method thereof. Background technique [0002] Heavy metal pollution in dry 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 soil as time goes on, endangering the plants grown in the 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 different means...

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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 also not suitable for water-deficient, desertified or salinized soils, and its application range is limited; Patent "Heavy Metal Contaminated Soil Microbial Restoration Agent and Its Application" (application number: 201410682558.2, publication date: 2015-04-22) A heavy metal-contaminated soil treatment agent using Bacillus subtilis and Candida tropicalis as active ingredients is disclosed. The bioremediation agent of this invention can adsorb a certain proportion of heavy metals and can remain in the soil for a period of time, but Candida tropicalis It belongs to anaerobic bacteria, which cannot survive for a long time in dry and ventilated soil. On the other hand, there are too few effective strains. Since each microorganism has its own limitations, its effect on soil treatment is neither long-term nor comprehensive.