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Subsurface soil remediation method

A soil purification and soil technology, applied in the field of underground soil purification, can solve problems such as low purification efficiency of underground soil, and achieve the effect of improving purification efficiency

Inactive Publication Date: 2019-07-05
TAKENAKA KOMUTEN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, pollutants such as oil and benzene, which are less dense than water, stay near the groundwater surface in the underground soil. Therefore, it is difficult to make the active liquid fully travel to its location, and the purification efficiency of the underground soil is low.

Method used

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Embodiment Construction

[0025] Embodiments of the present disclosure will be described with reference to the drawings. First, an underground soil purification method according to an embodiment of the present disclosure will be described. Note that descriptions of common components denoted by the same symbols in a plurality of drawings may be omitted.

[0026] In the underground soil purification method of this embodiment, the washing process is performed first, and then the pollutant decomposition process is performed. That is, before performing the pollutant decomposition step, the rinsing step is performed. figure 1 Shown in the front cross-sectional view of the flushing purification system 10 for the flushing process, figure 2 The front cross-sectional view of FIG. 10 shows a pollutant decomposition and purification system 12 that performs a pollutant decomposition process.

[0027] First, the flushing purification system 10 will be described.

[0028] like figure 1 As shown, in the vicinity...

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Abstract

A subsurface soil remediation method wherein: an active fluid for activating a decomposing microorganism that decomposes a contaminating substance in subsurface soil is heated to a temperature higherthan the temperature of groundwater and delivered into the subsurface soil by injection into injection wells provided in the ground, or the active fluid for activating the decomposing microorganism wherein the decomposing microorganism for decomposing the contaminating substance in the subsurface soil is mixed is heated to a temperature higher than the groundwater temperature and delivered into the subsurface soil by injection into the injection wells provided in the ground, or a purification fluid for decomposing the contaminating substances in the subsurface soil is heated to a temperature higher than the groundwater temperature and delivered to the subsurface soil by injection into the injection wells provided in the ground; and air is infused under pressure into the injection wells, and the air is delivered into the subsurface soil from a position in the injection wells lower than the position in the injection wells to which the active fluid or purification fluid is delivered.

Description

technical field [0001] The present disclosure relates to a subsoil purification method for purifying subsoil contaminated with pollutants. Background technique [0002] As one of the methods of purifying underground soil contaminated with pollutants, there is a biological purification method. In this method, an active liquid containing an active agent such as yeast extract is injected from the upstream side of the contaminated area of ​​the underground soil to activate the decomposition activity of the decomposing microorganisms existing in the underground soil that decompose the pollutants, and utilize the active liquid existing in the underground soil. The activated decomposing microorganisms decompose the pollutants in the subsurface soil, thereby purifying the subsurface soil. [0003] For example, a method for purifying underground soil is disclosed in Japanese Patent Laying-Open No. 2015-77571, wherein a liquid containing a microbial nutrient source and a polluting su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/02B09C1/08
CPCB09C1/08B09C1/10B09C1/00B09C1/002B09C2101/00B09C1/02
Inventor 稻叶薰山崎祐二清水孝昭奥田信康古川靖英中岛朋宏清塘悠向井一洋舟川将史长谷川爱大村启介田边康太
Owner TAKENAKA KOMUTEN CO LTD