Plant-animal-combined efficient heavy-metal-contaminated soil repairing method and system

Abstract

The invention discloses a plant-animal-combined efficient heavy-metal-contaminated soil repairing method. Through large-scale earthworm propagation, earthworm cocoons are produced in a batched manner, and the situation that a batch of the earthworm cocoons die after being inoculated into the soil directly due to high-concentration pollution is prevented. Plants with green seedlings planted in the earlier period serve as the feed, the earthworm propagation cost is lowered, and the requirements for a stocking area are lowered; the plants and earthworm breeding devices are arranged in a strip-shaped manner at intervals, meanwhile the earthworm breeding devices are convenient to place, and the earthworm cocoon processing difficulty is lowered; and meanwhile, the biodegradable plant fibers are arranged and do not need to be recycled, processing efficiency is improved, and large-scale high-efficiency processing is facilitated in the meantime. A separating conveyor belt is utilized to recycle earthworms, the processing efficiency of the soil is greatly improved, and the separation difficulty and cost are lowered. The earthworm breeding devices are provided with earthworm sustained-release capsules, the situation that a batch of the earthworms die at the same time is prevented, sustained-release is performed according to the sustained-release, and gradient repair is achieved.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal pollution control in environmental pollution control. In particular, it relates to a method and system for combining plants and animals to efficiently remediate polluted soil. Background technique [0002] The treatment of heavy metal-contaminated soil is a social problem. Existing remediation technologies include the following: [0003] Engineering restoration method: mainly includes three methods of soil replacement, soil removal and soil turning. Soil upturning is suitable for lightly polluted soil, while soil removal and soil replacement are suitable for heavily polluted soil. These three methods can dilute the concentration of heavy metals in the soil and reduce the toxicity of heavy metals to plants. The engineering restoration method is relatively stable and thorough, but it requires a large amount of work and high investment costs. It will not only damage the internal structure...

AI Technical Summary

Problems solved by technology

[0008] However, when the existing technology uses animals such as earthworms for treatment, the earthworms are prone to mass death under high-concentration pollution. At the same time, the existing technology mostly uses a single repair method, and the existing technology has low efficiency in treating polluted soil. It is impossible to efficiently treat polluted soil on a large scale. Finally, during the separation process of earthworms and soil, the separation efficiency of earthworms is crossed, which often results in the death of earthworms.

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