Biological ventilation system for contaminated site restoration

Abstract

The invention discloses a biological ventilation system for contaminated site restoration. The biological ventilation system is arranged at a contaminated site to be restored. The biological ventilation system comprises a gas-liquid separating device, a gas injection device, an extraction device, a gas treatment unit, a liquid treatment unit and a pipe well extending into contaminated soil. The upper end of the pipe well is in sealed connection with a pipeline, the lower end of the pipe well is sealed, a plurality of through holes are formed in the well wall of the pipe well, the pipe well isinternally provided with a header pipe, and the gas injection device and the extraction device are connected with the header pipe through a gas injection pipeline and an extraction pipeline. The gas-liquid separating device is connected with the extraction pipeline, and a liquid outlet of the gas-liquid separating device is connected with the liquid treatment unit. An air inlet of the extraction device is connected with an air outlet of the gas-liquid separating device, and an air outlet of the extraction device is connected with the gas treatment unit. In the biological ventilation system, the pipe well serves as a gas injection well and also serves as an extraction well and has double functions, the number of wells is reduced, the time of contact between microorganisms and air is prolonged, the contact area of the microorganisms and the air is increased, the degradation efficiency of the microorganisms to pollutants is improved, the cost is greatly reduced, and relatively high efficiency can be achieved.

Description

technical field [0001] The invention relates to the technical field of contaminated site restoration, in particular to a biological ventilation system for contaminated site restoration. Background technique [0002] The use and management of various toxic and harmful chemicals are improper, solid waste is stacked and dumped on the soil surface, harmful waste water seeps into the soil, exhaust gas from automobiles, harmful gases in the atmosphere and floating dust settle in the soil with rainwater, and a large amount of chemical fertilizers And pesticides are scattered into the environment, resulting in more and more opportunities for soil pollution, and its degree is becoming more and more serious. The polluted area continues to expand, which seriously threatens the ecological environment and human health. [0003] For polluted soil, it will take decades or even hundreds of years to purify and restore polluted soil by itself. Therefore, using engineering technology to repair...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of poor single gas injection and extraction efficiency and high cost in the existing biological ventilation system for organic polluted sites. Therefore, the present invention provides a biological ventilation system for remediation of contaminated sites system

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