Method for treating wastewater after contaminated soil remediation

Abstract

The invention discloses a method for treating wastewater after contaminated soil remediation. The comprises the following steps: collecting wastewater generated in a contaminated slag block flushing stage and a tail gas treatment stage into an adjusting tank, and conveying the wastewater into a primary sedimentation tank by the adjusting tank through a lifting pump to remove part of organic matters and SS in the wastewater; after passing through the primary sedimentation tank, the wastewater is self-retained to the chemical oxidation reactor by gravity, and after passing through the chemical oxidizer, most organic matters in the wastewater are removed by oxidation; the wastewater is retained by gravity, and a coagulant and a flocculant are added after the wastewater enters a secondary sedimentation tank so that organic matters in the wastewater are further removed; effluent of the secondary sedimentation tank flows into an intermediate water tank, the water is lifted to a quartz sand filter and an activated carbon filter through a lifting pump, pollutants in the wastewater are further filtered and adsorbed, and the treated wastewater is recycled according to site requirements; according to the method, wastewater generated in the contaminated soil remediation process is effectively treated, and secondary pollution of soil is prevented; human health is guaranteed, and normal production and construction activities are guaranteed.

Description

technical field [0001] The invention relates to the technical field of soil treatment, in particular to a method for treating wastewater after remediation of polluted soil. Background technique [0002] Soil is one of the main natural resources that humans rely on for survival, and it is also an important part of the human ecological environment; with the increase in the discharge of inorganic pollutants and organic pollutants in the environment, the situation of soil pollution is becoming more and more serious; soil pollution It not only affects the output and quality of agricultural products, but also involves the quality of the atmosphere and water environment. It can endanger the life and health of animals and humans through the food chain; soil pollution needs to be restored. Soil restoration refers to the use of physical, chemical and biological methods to transfer, absorb, Degrade and transform the pollutants in the soil to reduce its concentration to an acceptable le...

AI Technical Summary

Problems solved by technology

With the development of science and technology, many soil remediation materials have been developed; the restoration of contaminated soil by artificial spraying of remediation agents, inoculum solutions, etc., has the disadvantages of poor remediation effect and low remediation efficiency; at the same time, in the process of soil remediation Wastewater will be produced, which needs to be treated before it can be discharged to avoid secondary pollution. Therefore, an effective wastewater treatment method after remediation of contaminated soil is needed

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