Composite microbial soil remediation agent and preparation method thereof

Abstract

The invention discloses a composite microbial soil remediation agent and a preparation method thereof. The composite microbial soil remediation agent is prepared from the following raw materials in parts by weight: 10-18 parts of a composite microbial agent, 30-70 parts of organic matters and 10-25 parts of inorganic raw materials, the compound microorganisms are prepared from the following microorganisms in parts by weight: 0.5 to 5 parts of bacillus subtilis, 0.5 to 5 parts of bacillus licheniformis, 0.3 to 4 parts of bacillus mucilaginosus, 0.2 to 3 parts of bacillus megaterium and 0.2 to 3 parts of purpureocillium lilacinum; the organic matter is crop waste; the inorganic raw material is a mixture of sepiolite, medical stone and apatite; the compound microorganism soil remediation agent has a good heavy metal contaminated soil remediation effect and has a remarkable effect in the aspects of improving the physical and chemical properties of soil and remediating soil pollution, the remediation rate of the heavy metal contaminated soil reaches 50% or above, and the yield of crops can be remarkably increased.

Description

technical field [0001] The invention belongs to the field of soil restoration, and in particular relates to a compound microbial soil restoration agent and a preparation method thereof. Background technique [0002] Soil is the basis of the source of material for human survival. With the development of industry and agriculture, soil pollution is becoming more and more serious, especially heavy metal pollution in soil. Heavy metal pollution in soil is hidden and cumulative; Heavy metals in the soil enter the human body through the food chain, posing a threat to human health; the restoration of heavy metal-contaminated soil has become an urgent environmental problem, especially for farmland soil. Currently, the restoration agents for heavy metal-contaminated soil include chemical restoration agents and biological Soil remediation agents and chemical remediation agents have limited remediation effects on the one hand, and on the other hand, chemical remediation agents will inev...

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Problems solved by technology

[0002] Soil is the basis of the source of material for human survival. With the development of industry and agriculture, soil pollution is becoming more and more serious, especially heavy metal pollution in soil. Heavy metal pollution in soil is hidden and cumulative; Heavy metals in the soil enter the human body through the food chain, posing a threat to human health; the restoration of heavy metal-contaminated soil has become an urgent environmental problem, especially for farmland soil. Currently, the restoration agents for heavy metal-contaminated soil include chemical restoration agents and biological Soil remediation agents and chemical remediation agents have limited remediation effects on the one hand, and on the other hand, chemical remediation agents will inevitably change the micro-ecological environment of the soil, affect the soil fertility of farmland soil, and reduce the yield of crops; while pure biological Restorative agents only have a repairing effect, and their effect on improving soil physical and chemical properties and promoting crop growth is not satisfactory

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