Circular leaching system for farmland polluted soil repair treatment

Abstract

The invention discloses a circular leaching system for farmland polluted soil repair treatment. The system comprises an irrigation leaching system, a decontamination purifying system and a pure water storage and recharge system connected in sequence; drained water of the pure water storage and recharge system is supplied to the irrigation leaching system; the irrigation leaching system mainly consists of planting soil, an organic matter filter layer, a coarse sand filter layer, a double-wall corrugated seepage pipe and a water collecting pool; the planting soil, the organic matter filter layer, the coarse sand filter layer and the double-wall corrugated seepage pipe are arranged in sequence from top to bottom; an outlet of the double-wall corrugated seepage pipe is connected with the water collecting pool; and an outlet of the water collecting pool is connected with the decontamination purifying system. The system adopts the leaching method to reduce the content of pollutants in soil, and meanwhile, lowers the underground water level to prevent repeated pollution; and after polluted water permeated after soil leaching is decontaminated and purified, and the polluted water is recharged for irrigation leaching of the soil again, so that the pollutants in the soil are removed, farmlands are irrigated, and meanwhile, secondary pollution is not generated.

Description

technical field [0001] The invention relates to the fields of farmland pollution control and restoration and environmental pollution prevention and control, in particular to a circulating leaching system for farmland polluted soil restoration and treatment. Background technique [0002] Soil is the basis for human beings to survive. All things grow in the soil. Almost all the food, melons, fruits, and vegetables that people eat, as well as vegetable oil, sugar, and Chinese medicinal materials, etc. are produced from the soil; the meat, eggs, milk and other livestock that people eat Poultry products, as well as freshwater products, are mostly converted from feed grown in soil. Only by keeping clean soil can it be possible to produce safe food and ensure safety on the tip of the tongue from the source. However, for a long time, with the massive development and utilization of mineral resources, the rapid development of industrial production and the widespread use of various ch...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a circulating leaching system for remediation and treatment of farmland polluted soil. In some cases, the method of leaching is used to reduce the content of pollutants in the soil, and at the same time lower the groundwater level to prevent repeated pollution; after the polluted water seeped out of the soil is cleaned and purified, the soil is irrigated again through recharge. Washing, not only removes the pollutants in the soil but also irrigates the farmland without causing secondary pollution

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