Multi-type land soil ecological restoration system and working method thereof

Abstract

The invention belongs to the field of soil remediation, and particularly discloses a multi-type land soil ecological remediation system and a working method thereof. The multi-type land soil ecological remediation system sequentially comprises a germination layer, an ecological soil layer, a filling layer and an original soil layer; wherein the original soil layer is turned over, the depth of theoriginal soil layer is 30-60 cm, and a raw soil curing agent is added in the turning over process, and 5-20 g of the raw soil curing agent is added into each liter of the original soil; the filling layer is formed by mixing plant residues, activated sludge and a microbial agent; the ecological soil layer is composed of ecological soil bags and a filler in the ecological soil bags, the ecological soil bags are made of degradable materials, the filler is composed of normal soil, plant ash and a water-retaining agent, and after filling is completed, multiple ecological soil bags are transverselysewn to form the ecological soil layer; the germination layer is formed by mixing plant seeds and normal soil; the ratio of the thickness of the germination layer to the thickness of the ecological soil layer to the thickness of the filling layer is 1: 2: 3; wherein the normal soil is selected from one of brown earth, brown soil and silt filling soil.

Description

technical field [0001] The invention belongs to the field of soil restoration, and specifically discloses a multi-type land soil ecological restoration system and a working method thereof. Background technique [0002] Soil pollution in China has threatened the sustainable use of land resources and the ecological security of agricultural products. The farmland polluted by organic pollutants in the country has reached 36 million hectares. The types of pollutants include petroleum, polycyclic aromatic hydrocarbons, pesticides, and organic chlorine. It also pollutes a large area of ​​land; in the Shenfu petroleum sewage irrigation area, the content of polycyclic aromatic hydrocarbons in the surface layer and bottom soil both exceeds 600mg / kg, causing serious pollution of crops and groundwater. There are 20 million hectares of land polluted by heavy metals across the country, of which more than 700,000 hectares are seriously polluted, and 130,000 hectares of which have been aba...

AI Technical Summary

Problems solved by technology

At present, the ecological restoration method is a very potential soil restoration method, but there are also the following problems: ecological restoration research has achieved many ideal results in the laboratory, but when the results are applied to soil pollution sites, the expected results are often not achieved. It even contradicts the laboratory results, which limits its wide application; at the same time, in ecological restoration, it often brings external pollutants

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