Microbial product for treatment of heavy metal polluted saline-alkaline land and manufacture method thereof

Abstract

The invention discloses a microbial product for treatment of heavy metal polluted saline-alkaline land and a manufacture method thereof. The product comprises a nutrient medium and a target bacterial strain. The nutrient medium is a powdery nutrient medium and comprises a protein plant, an energy plant and a fiber plant. The target bacterial strain is specifically bacillus thuringiensis, Halorubrum alkaliphilum, Natronococcus and white rot fungi. The manufacture method comprises the following steps: preparing the nutrient medium, culturing the target bacterial strain, preparing a microbial product, and preserving the microbial product. The microbial product for treatment of heavy metal polluted saline-alkaline land is especially suitable for heavy metal polluted saline-alkaline land. By the use of the microbial product, harm of heavy metal pollution can be reduced, fertility of saline-alkaline land is raised, pH value of saline-alkaline land is improved, and normal plantation of crops is not affected during treatment.

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 saline-alkali land and a manufacturing method thereof. Background technique [0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to the incomplete statistics of UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which my country is the largest 99.13 million hectares. The formation of alkaline soil and alkalized soil in my country is mostly related to the accumulation of carbonate in the soil, so the degree of alkalization is generally high, and plants in severe saline-alkali soil areas can hardly survive. [0003] There are two major difficulties in the treatment of heavy metal pollution in saline-alkali land: one is that pollutants have poor mobility in the soil, long ...

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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 salinized areas, and heavy metals flowing into groundwater will also cause secondary pollution; 22) A heavy metal-contaminated soil remediation agent using Bacillus thuringiensis and Candida tropicalis as active ingredients is disclosed. The bioremediation agent of this invention can absorb a certain proportion of heavy metals and can remain in the soil for a period of time, but tropical false Trichotillomyces is an anaerobic fungus, which cannot survive for a long time in dry and ventilated soil. On the other hand, the effective strains have not been acclimated to heavy metals, and their tolerance to heavy metals is poor, and the enrichment effect is not good. Each microbe has its limitations, so its effect on soil treatment is neither long-lasting nor comprehensive