Simulation reaction device for in-situ heat treatment coupled microbial remediation of polluted site

Abstract

The invention relates to a simulated reaction device for in-situ heat treatment coupled microbial remediation of a contaminated site, which is characterized in that organic contaminated soil is buried in soil in a sandbox at a left pollution plume position, simulated underground water is set, the flow velocity of the underground water is controlled, and microorganisms and biological stimulants are injected; soil and sewage are heated in a mode of directly injecting hot water or heating a resistor, external hot water is controlled or the temperature is controlled within a preset range by a temperature controller, and the temperature detected by a thermocouple is regularly recorded and stored by a multi-path temperature inspection instrument; the multi-position sampling detection is effectively used for simulating the remediation process of site organic pollutant thermal coupling microorganism remediation specific pollutants, the influence of microorganisms and temperature environment on the site remediation process is explored, and the influence of different environment temperatures and microbial population conditions on the concentration and distribution of soil organic matters can be intuitively known; the method is beneficial for guiding law and mechanism exploration of thermal coupling microorganism remediation of organic contaminated soil in an actual engineering site, and then the site remediation effect is improved.

Description

technical field [0001] The invention relates to the technical field of soil and groundwater pollution remediation, in particular to a simulated reaction device for in-situ heat treatment coupled with microorganisms to remediate contaminated sites. Background technique [0002] Due to the obvious concealment, hysteresis, latent and heterogeneity of soil after being polluted, it is extremely difficult to detect in time after soil is polluted, thus migrating to groundwater and causing pollution to groundwater, making it difficult to remediate polluted soil and groundwater , The cycle is long and the cost is high. The soil in-situ thermal remediation technology mainly uses heating elements to heat the soil and groundwater of the polluted site, promotes the volatilization of pollutants in the underground environment at a relatively high temperature, and extracts gaseous pollutants from the soil through an extraction system. The exhaust gas is collected and treated to achieve the...

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Problems solved by technology

[0003] However, due to the complex soil and groundwater environment in the site, the migration and transformation laws of pollutants in the research process are different with the actual hydrogeological conditions, and the optimal temperature for the degradation of pollutants by the indigenous microbial community is also significantly different, so the coupling of in-situ heat treatment The key to microbial remediation is to clarify the target heating temperature of the site and the migration and transformation of pollutants under the target heating temperature

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