Sustainable soil remediation system and remediation method thereof

Abstract

The invention discloses a sustainable soil remediation system, belonging to the technical field of soil remediation. The system comprises a water collecting tank, a leaching device, a new soil layer,a waste water treatment device, a waste gas treatment device and a recharge device; the water collecting tank is arranged around the soil to be repaired and communicated, the tank is deep to the underground water level and below the soil to be repaired, the surface is sealed by a cover plate and is provided with a drainage port and an air extraction port, the drainage port is connected with a waste water treatment device through a drainage pump, and the air extraction port is connected with the waste gas treatment device through an air extraction pump; the leaching device consists of a transverse surface pipeline distributed on the surface of the soil to be repaired and a vertical surface liquid inlet pipe threaded with the transverse surface pipeline, wherein the bottom of the transversesurface pipeline is provided with a plurality of liquid outlets; the new soil layer is non-polluted soil, which covers on the transverse pipeline, and the liquid inlet pipe passes through the new soillayer; the recharge device recharges water to the soil outside the water collecting tank to prevent the soil outside from settling. The invention continuously repairs the contaminated soil and controls the ground subsidence while meeting the requirement that the contaminated soil area is used.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a soil remediation system and a remediation method thereof, which enable the area where the soil is located to be quickly used and sustainably remediate the soil. Background technique [0002] Soil remediation is a technical measure to restore the normal function of polluted soil. In the soil remediation industry, there are more than one hundred existing soil remediation technologies, and there are more than ten commonly used technologies, which can be roughly divided into three methods: physical, chemical and biological; Restoration techniques. [0003] Among them, the in-situ remediation technology is the process of treating unexcavated soil without much disturbance to the soil, but it is difficult to deal with the three wastes (waste water, waste gas, fixed waste) in the soil; while the ex-situ remediation technology often requires a large amount of Exca...

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Problems solved by technology

[0003] Among them, the in-situ remediation technology is the process of treating unexcavated soil without much disturbance to the soil, but it is difficult to deal with the three wastes (waste water, waste gas, fixed waste) in the soil; while the ex-situ remediation technology often requires a large amount of Excavating and transporting the soil, the processing cost is high, and it will also affect the reuse of soil; whether it is in-situ restoration or ex-situ restoration, in the process of soil restoration, it is inevitable to excavate and transport the soil or inject high-pressure steam or chemical shower Such operations lead to uneven distribution of water in the soil, and most of the prior art ignores the settlement of the adjacent soil during the repair process or the later settlement of the repaired soil. The settlement of the adjacent soil will cause the adjacent buildings or the ground to drop, affecting Stabilization of adjacent buildings while settlement of remediation soil can affect soil use at later stages of remediation completion

[0004] In addition, the soil remediation process is a time-consuming task, and it is difficult to use the soil when it does not meet the safe use standard. Facing the development of the construction industry in today's society and driven by economic benefits, the delayed use of soil area often affects a The development of a region or even an industry, especially when it comes to large areas of polluted soil

Although there is foreign soil technology in the existing technology, it simply covers the polluted soil with a certain thickness of non-polluted soil, which cannot fundamentally solve the problem of polluted soil

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