Method for repairing substrate containing heavy metals by utilizing earthworms and sweet sorghum

Abstract

The invention discloses a method for repairing a substrate containing heavy metals by utilizing earthworms and sweet sorghum. The method comprises the following steps: inoculating earthworms into a heavy metal containing substrate for breeding, and then, planting two crops of sweet sorghums. The heavy metal containing substrate is soil or ash soil, wherein the ash soil is obtained by fermenting organic garbage; when the heavy metal containing substrate is the soil, the sweet sorghums are directly planted after the earthworms are inoculated into the soil and are bred for 20-25 d, or the earthworms are taken out after being inoculated into the soil and bred for 20-25 d; and when the heavy metal containing substrate is the ash soil, the earthworms are inoculated into the ash soil and are bredfor 20-25 d and are taken out, and then, the sweet sorghums are planted in the ash soil. According to the method, the heavy metal containing substrate is synergically repaired by using the earthwormsand the sweet sorghum, so that the content of heavy metals in the substrate is effectively reduced.

Description

technical field [0001] The invention relates to the field of heavy metal matrix restoration. More specifically, the present invention relates to a method for repairing heavy metal-containing substrates using earthworms and sweet sorghum. Background technique [0002] With the rapid development of industry and rapid economic development, the problem of excessive heavy metal content in soil or domestic waste has become increasingly prominent. The soil or domestic waste with excessive heavy metal content will be used for planting crops after classified treatment. The crops will be enriched with heavy metals and passed through The food chain enters the human body, which seriously threatens the health of the human body. At present, for the problem of excessive heavy metals, earthworms or plant roots are often used to repair heavy metals, but the repair effect of this treatment method is not ideal. Garbage still has excessive heavy metal content. Contents of the invention [0...

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Problems solved by technology

[0002] With the rapid development of industry and rapid economic development, the problem of excessive heavy metal content in soil or domestic waste has become increasingly prominent. The soil or domestic waste with excessive heavy metal content will be used for planting crops after classified treatment. The crops will be enriched with heavy metals and passed through The food chain enters the human body, which seriously threatens the health of the human body. At present, for the problem of excessive heavy metals, earthworms or plant roots are often used to repair heavy metals, but the repair effect of this treatment method is not ideal. Garbage still has excessive heavy metal content

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