Water-saving and pollution-preventing farmland water conservancy system

By improving the farmland irrigation system and combining modified zeolite and wetland plants, a highly efficient adsorption matrix-plant-microorganism system is formed, which solves the problem of low nitrogen and phosphorus removal efficiency of the existing system during the flood season and rainstorm season, and achieves more efficient farmland wastewater treatment.

CN119019015BActive Publication Date: 2026-06-02GUANGXI COLLEGE OF WATER RESOURCES & ELECTRIC POWER
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Patent Information

Application Number
CN202411155089.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-22
Publication Date
2026-06-02
Estimated Expiration
2044-08-22

AI Technical Summary

Technical Problem

Existing farmland irrigation systems are slow in removing non-point source pollutants from farmland, especially nitrogen and phosphorus, making it difficult to effectively treat large amounts of wastewater during flood season or rainstorms.

Method used

A water-saving and pollution-preventing farmland irrigation system is adopted, including drainage ditches, buffer ponds, artificial wetlands, and backbone ecological ditches. The artificial wetlands are divided into left, middle, and right zones, filled with modified zeolite, and combined with wetland plants and submerged plants to form an integrated nitrogen and phosphorus removal system of adsorption matrix-plant-microorganism.

Benefits of technology

It improves nitrogen and phosphorus removal efficiency in a short period of time, is suitable for flood season and rainstorm season, and increases the total nitrogen and total phosphorus load reduction rate by about 20% respectively, enhancing the system's load resistance and nitrogen and phosphorus reduction capacity.

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Abstract

The application discloses a water-saving and anti-pollution type farmland water conservancy system and relates to the technical field of farmland drainage. The farmland water conservancy system comprises a drainage grass ditch, a buffer pool, an artificial wetland and a backbone ecological ditch; the artificial wetland is divided into a left area, a middle area and a right area, the left area and the right area are filled with modified zeolite, the middle area is sequentially provided with a lower filler layer, a middle filler layer and an upper vegetation layer from bottom to top, the lower filler layer is mainly prepared by mixing modified zeolite and alkaline cinder, the middle filler layer is mainly prepared by mixing soil, alkaline cinder and crop straw, and the upper vegetation layer is planted with hygrophytes. The farmland water conservancy system can occupy a smaller area to treat a larger amount of sewage in a shorter time, improves the removal efficiency of nitrogen and phosphorus in farmland sewage, and is suitable for farmland sewage treatment in a flood season when the rainfall is large and the rainwater seepage speed is fast.
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Citation Information

Patent Citations

  • A method for reducing non-point source pollution in farmland

    CN107055797B

  • Method for reducing non-point source pollutants of farmland

    CN107055797A

  • Preparation method of modified suspended filler for MBBR (moving bed biofilm reactor)

    CN109912042A

  • Composite ecological treatment method for intercepting farmland recession pollutants

    CN112358053A

  • Compound wetland ecology method and system for controlling pollution of nitrogen and phosphor

    CN1446759A