Ecological test system for treating farmland drainage water quality

Abstract

The invention discloses an ecological test system for treating farmland drainage water quality. The ecological test system comprises an artificial ecological channel, a piece of artificial wet land and a drainage channel for draining water, wherein the artificial wet land comprises multiple levels of water collection areas and water distribution channels, a concrete pipeline with a second control valve is arranged between the bottom of each level of water collection area and the water distribution channel in front of the water collection area, each level of water collection area is isolated from the adjacent water distribution channels at two sides by virtue of a concrete wall, and the concrete wall between each level of water collection area and the water distribution channel in front of the water collection area is higher than the subsequent concrete wall; the water distribution channel in front of the primary level of water collection area is a water inlet channel, and the water distribution channel behind the last level of water collection area is a water returning channel; the water inlet channel is connected with the artificial ecological channel in an end-to-end manner; the water returning channel is connected with the drainage channel; the artificial ecological channel comprises a channel top, a channel wall, a channel bottom and bamboo-caged stones, and the cross section of the artificial ecological channel is in a trapezoid shape. The ecological test system is economical, reliable, capable of saving the land, and capable of reducing the emission of N and P by virtue of the synergism of the ecological channel and a artificial wet land system, and increasing the farmland drainage water quality treatment efficiency.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to an ecological test system for treating the water quality of farmland drainage. Background technique [0002] In recent years, with the increase in the application of pesticides and fertilizers in agricultural production, the problem of agricultural non-point source pollution has become increasingly prominent, and water eutrophication caused by nutrients such as nitrogen and phosphorus has become an important source of water pollution. Pollutants such as nitrogen and phosphorus in farmland mainly enter the farmland drainage system through farmland runoff or leaching seepage and pollute lakes, rivers and other water bodies, and their discharge is difficult to control and cannot be treated centrally. Research and application at home and abroad have shown that the combination of artificial ecological ditches, constructed wetland systems and farmland irrigation and ...

AI Technical Summary

Problems solved by technology

[0005] However, the current research on the treatment technology of farmland drainage water quality is mostly focused on the single treatment effect of artificial ecological ditches or constructed wetland systems, which have low pollutant removal rates, and the content of nitrogen, phosphorus and other pollutants in the treated water still exceeds the standard. However, it has disadvantages such as complexity and poor universality, and the proposed ecological ditch and constructed wetland occupy a large area, which is not convenient for carrying out experiments on small areas such as test sites

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