Mixed microbial agent for soil remediation, and preparation method and application thereof

Abstract

The invention discloses a mixed microbial agent for soil remediation, and a preparation method and application thereof. The mixed microbial agent comprises photosynthetic bacteria, lactobacillus bulgaricus, bacillus subtilis and beer saccharomycete biomass by certain ratio. The method comprises the following steps: uniformly mixing the lactobacillus bulgaricus, the bacillus subtilis and the beer saccharomycete biomass to server as a main agent, and then uniformly mixing the photosynthetic bacteria with an appropriate amount water to serve as an auxiliary agent. The mixed microbial agent has the characteristics of simple constituents, high easiness in preparation, low cost and good stability, and can effectively remove heavy metal cadmium ion in polluted soil. The preparation method is simple, convenient to operate, green and environmentally friendly, without three wastes pollution. The mixed microbial agent can reduce the activity of heavy metal cadmium in the soil, reduce or interdict the probability that the heavy metal cadmium enters crops, and reduce the harm to human body by the heavy metal cadmium. Compared with a blank control group, the content of the heavy metal cadmium in a mulberry leaf production base treated by the mixed microbial agent is reduced by 20.3 percent.

Description

technical field [0001] The invention belongs to the technical field of soil remediation biological bacterial agents, and more specifically relates to a soil remediation microbial composite bacterial agent, and also relates to a preparation method of a soil remediation microbial composite bacterial agent, and also relates to a soil remediation microbial composite bacterium The use of agents in soil remediation. Background technique [0002] With the continuous acceleration of the industrialization process, the irrational mining of mineral resources and their smelting discharge, long-term sewage irrigation and sludge application to the soil, atmospheric deposition caused by human production activities, and the application of chemical fertilizers and pesticides have caused serious soil pollution. . In July 2006, Zhou Shengxian, director of the State Environmental Protection Administration, said in a video conference on the national soil pollution survey and special work on pol...

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Problems solved by technology

These methods of physical measures have the advantages of stability and quick results, but there are disadvantages such as large engineering volume, high investment costs and hidden dangers of secondary pollution, so they are not suitable for the treatment of large-scale pollution.

[0007] (2) Chemical treatment methods: including chemical precipitation method, ion exchange method, leaching method, application of chemical amendments, increase of soil organic matter, etc. Although these methods can reduce the toxicity of heavy metals in the environment and improve bioavailability in the short term, but This method is easy to cause secondary pollution due to the artificial application of chemical agents to the environment, and this method is an in-situ repair method. Heavy metals still remain in the environment and are easily reactivated. The potential threat has not been eliminated.

The benefit of phytoremediation mainly depends on the growth rate of plants, but the hyperaccumulative plants usually used to control heavy metal pollution are relatively short, low in biomass and long in growth cycle, so their remediation efficiency is very low

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