Method and system for in-situ synchronous remediation of soil and underground water in organic contaminated site

Abstract

The invention discloses a method and a system for in-situ synchronous remediation of soil and underground water in an organic contaminated site, and relates to the technical field of remediation of industrial organic contaminated sites. By fully utilizing the dissolution promoting and desorption capacities during acidic and alkaline liquid leaching on organic matters in soil, the organic matters in the soil are respectively subjected to acid-base leaching treatment and oxidation treatment by utilizing underground water, so that the organic matters in the soil are transferred into the underground water, and then the underground water is pumped out for biochemical treatment, so that the soil is repaired in situ and the underground water is purified. Compared with the prior art, the method has the advantages that in-situ remediation is adopted, the site is not interfered, the underground water flow field is not damaged, the secondary pollution problem is avoided, and the method is a safe,clean and efficient site comprehensive remediation technology. The method is safe, reliable, low in equipment cost, relatively low in medicament cost, good in treatment effect, acceptable in operation energy consumption and relatively low in total treatment cost.

Description

technical field

[0001] The invention relates to the technical field of remediation of industrial organic matter-contaminated sites, in particular to a method and system for in-situ and synchronous remediation of soil and groundwater in organic-contaminated sites. Background technique

[0002] Industrial enterprises, especially petrochemical and coal chemical industries, produce a large amount of organic pollutants such as polycyclic aromatic hydrocarbons and benzene series. During the production process, it is inevitable due to leakage, storage, transportation, accidents, or even illicit discharge. A large amount of organic matter will enter the environment and stay in the soil of the industrial site. The soil pollution of the site will also cause serious pollution of groundwater. After the relocation or shutdown of these enterprises, the problem of organic pollution left over from the site is very prominent. In 2015, there was a shocking site pollution poisoning accident i...

Examples

Embodiment 1

[0032] This embodiment provides an in-situ synchronous repair system for industrial organic pollution sites, including a pumping system, a biochemical reaction system, a filter cloth filter system, an oxidation potential water generator, and a rinsing system connected in sequence. When the groundwater is input into the biochemical reaction system, the biochemical reaction system contains biological sludge for anaerobic and / or anoxic and aerobic treatment of the groundwater, and the filter cloth filter system is used to treat the groundwater through the biochemical reaction The groundwater treated by the system is filtered, the oxidation potential water generator is used to decompose the saline groundwater into acidic water and alkaline water, and the leaching system is used to spray the configured leaching solution to the soil.

[0033] It also includes a groundwater soil freezing system and a COD measuring instrument, the groundwater soil freezing system is used to cut off the...

Embodiment 2

[0062] This example provides a method for synchronously remediating soil and groundwater in situ at an organically polluted site. The specific steps are the same as those in Example 1. When the repair system is in working condition, the five small blocks are respectively rinsed with eluent A, eluent B, water or idle (because the time of water rinsing is usually only 1 / 2 of the eluent rinsing time, Therefore, there is a certain period of time after water rinsing, and the eluent C is leaching, water washing or idle state, which can simplify the complexity of operation.

technical field

[0001] The invention relates to the technical field of remediation of industrial organic matter-contaminated sites, in particular to a method and system for in-situ and synchronous remediation of soil and groundwater in organic-contaminated sites. Background technique

[0002] Industrial enterprises, especially petrochemical and coal chemical industries, produce a large amount of organic pollutants such as polycyclic aromatic hydrocarbons and benzene series. During the production process, it is inevitable due to leakage, storage, transportation, accidents, or even illicit discharge. A large amount of organic matter will enter the environment and stay in the soil of the industrial site. The soil pollution of the site will also cause serious pollution of groundwater. After the relocation or shutdown of these enterprises, the problem of organic pollution left over from the site is very prominent. In 2015, there was a shocking site pollution poisoning accident i...

Examples

Embodiment 1

[0032] This embodiment provides an in-situ synchronous repair system for industrial organic pollution sites, including a pumping system, a biochemical reaction system, a filter cloth filter system, an oxidation potential water generator, and a rinsing system connected in sequence. When the groundwater is input into the biochemical reaction system, the biochemical reaction system contains biological sludge for anaerobic and / or anoxic and aerobic treatment of the groundwater, and the filter cloth filter system is used to treat the groundwater through the biochemical reaction The groundwater treated by the system is filtered, the oxidation potential water generator is used to decompose the saline groundwater into acidic water and alkaline water, and the leaching system is used to spray the configured leaching solution to the soil.

[0033] It also includes a groundwater soil freezing system and a COD measuring instrument, the groundwater soil freezing system is used to cut off the...

Embodiment 2

[0062] This example provides a method for synchronously remediating soil and groundwater in situ at an organically polluted site. The specific steps are the same as those in Example 1. When the repair system is in working condition, the five small blocks are respectively rinsed with eluent A, eluent B, water or idle (because the time of water rinsing is usually only 1 / 2 of the eluent rinsing time, Therefore, there is a certain period of time after water rinsing, and the eluent C is leaching, water washing or idle state, which can simplify the complexity of operation.