Paddy field recession water purification device placed in ridge of field

Abstract

The invention provides a paddy field recession water purification device placed in a ridge of a field. The paddy field recession water purification device is characterized in that a framework of a single water purifying device is constructed by using reinforcing steel bars with the diameter of phi10, plastic plates are arranged at two sides of the framework, steel wire meshes are arranged at the other four faces of the framework, a plastic gate is arranged at the front end of the framework, the interior of the device is partitioned into a part A and a part B by steel wire meshes with fine density, the volume ratio of the part A to the part B is 2: 1, the steel wire mesh of the part A is a high-density steel wire mesh and is filled with bio-filler balls, the steel wire mesh of the part B is a fine-density steel wire mesh and is filled with activated carbon, the front and rear faces of the single water purifying device are designed to be openable, and the single water purifying device or two single water purifying devices are placed in the ridge of a drainage end of the paddy field and are fixed by wood piles. The paddy field recession water purification device has the advantages that the traditional drainage manners that the traditional paddy fields directly drain paddy field recession water through opening gates and the water is not purified are improved, and harmful substances, such as nitrogen, phosphorus, organic substances and hardly-biodegradable pesticide residues, can be effectively trapped from recession water of cultivated field.

Description

technical field [0001] The invention relates to a paddy field water quality purification device placed on the field ridge, which reduces the content of harmful substances such as nitrogen, phosphorus, organic matter and difficult-to-biodegradable pesticide residues in the farmland water drainage in an ecological drainage manner, and is suitable for agricultural use. Pollution disposal in heavily polluted farming areas, especially plain irrigated agricultural areas, such as Taihu Lake agricultural farming area. The invention belongs to the technical field of farmland non-point source pollution control. Background technique [0002] With the development of society and economy, the problem of surface water pollution caused by agricultural non-point source pollution in my country is becoming more and more significant. According to the Bulletin of the First National Survey of Pollution Sources, the total nitrogen and total phosphorus emissions from agricultural non-point source ...

AI Technical Summary

Problems solved by technology

[0005] What the present invention proposes is a kind of paddy field dewatering water purification device placed on the ridge of the field. Its purpose is to control the pollution of irrigation type paddy field dewatering. Effectively control the concentration of nitrogen and phosphorus in the receding water of farmland to reduce the degree of eutrophication of the receiving water body, reduce the content of harmful substances such as pesticide residues in the receding water of farmland to reduce the harm to aquatic organisms in the receiving water body, and improve the direct opening of the gate in the traditional rice field. The traditional drainage method that drains rice fields and recedes water without any purification of water quality

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