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Device for promoting secretion and denitrification of plant root materials in constructed wetland and method thereof

A technology for artificial wetlands and plant roots, which is applied in the adjustment methods of biological treatment, chemical instruments and methods, water pollutants, etc. problems, to achieve the effect of facilitating aeration and oxygen supply, promoting the secretion of root microorganisms, and increasing the attachment surface

Pending Publication Date: 2022-02-25
NANJING KESHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the root system of phytoplankton is not developed enough, and the release of root exudates is limited, while aquatic plants with developed root systems are often emergent plants, and their developed root systems are located in the soil, which greatly affects the release of root exudates. As a result, the ability to denitrify the water quality is limited, and it is also difficult for the root system in the soil to regulate the release concentration of root exudates through external regulation.

Method used

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  • Device for promoting secretion and denitrification of plant root materials in constructed wetland and method thereof
  • Device for promoting secretion and denitrification of plant root materials in constructed wetland and method thereof
  • Device for promoting secretion and denitrification of plant root materials in constructed wetland and method thereof

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Embodiment 1

[0035] see Figure 5 , a device for promoting the denitrification of plant root substances in a constructed wetland, including a plurality of hangers 1, in order to better adapt to the harsh environment of the constructed wetland, the hangers 1 are made of engineering weather-resistant plastics, and a plurality of hangers 1 are networked It has a honeycomb structure and is connected by pipe fittings 2 to form a connected aquatic plant planting bracket. Since the aquatic plant planting bracket adopts a honeycomb structure, after the aquatic plant planting bracket is planted with aquatic plants 3, it can form a floating on the water surface. For the aquatic flora above, in order to highlight the roots of aquatic plants, emergent plants with well-developed root systems should be used as aquatic plants.

[0036] see Figure 1-2 , the middle part of the hanger 1 is provided with a hollow cavity 13, the hanger 1 is a multi-corrugated column structure, and the hanger 1 is located on...

Embodiment 2

[0042] The present invention also provides a method for promoting plant root exudation and denitrification in constructed wetlands, a device for promoting plant root secretion and denitrification using artificial wetlands, specifically comprising the following steps:

[0043] Step 1. On the shore of the water area of ​​the artificial wetland, connect the hangers 1 through the connecting part to form a honeycomb-shaped aquatic plant planting bracket, and use the pipe fittings 2 to connect the connection pipes 15 on each hanger 1 in series and connect them in parallel. The main pipe is connected with a liquid supply pump and an aeration pump. The liquid supply pump supplies two liquids, one is a carbon source solution, which is a mixed solution of sugars and organic acids, and the purpose is to add water to the roots of aquatic plants. The carbon source is to adjust the carbon-nitrogen ratio, and the other is the microbial agent solution, the purpose is to add microbial agent to ...

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Abstract

The invention relates to the technical field of sewage treatment, and discloses a device for promoting secretion and denitrification of plant root materials in a constructed wetland, which comprises a plurality of hanging frames, and the hanging frames are networked to form a honeycomb structure to form a communicated aquatic plant planting bracket; a cavity is formed in the middle of the hanging frame; the hanging frame is of a multi-edge-column structure, a growth position is arranged on each edge face of the hanging frame, and a plurality of nozzles are arranged on each growth position in the length direction; a connecting pipe for connecting pipe fittings is arranged at the top of the hanging frame; and a rotatable connecting part is arranged on each edge of the hanging frame. The invention also provides a method for promoting the secretion and denitrification of plant root materials in the constructed wetland. According to the invention, emergent aquatic plants with developed root systems can live in a water area in a floating manner, and the developed root systems directly act in water, so that regulation and control of wetland plant rhizosphere secretion concentration and oxygen supply are facilitated, promotion of nitrification and denitrification of root system microorganisms is facilitated, and the denitrification capability of the constructed wetland on lake water is improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a device and a method for promoting denitrification by plant root material secretion in artificial wetlands. Background technique [0002] In recent years, non-point source pollution from rural areas and farmland is the main source of nitrogen pollution in lake water. Nitrate is the main form of nitrogen, and the water quality is characterized by low carbon-nitrogen ratio (C / N) and serious eutrophication. Promote the abnormal proliferation of algae and release harmful substances, resulting in the decline of the water environment quality of urban lakes and the imbalance of the ecosystem. [0003] Constructed wetland is an artificial sewage treatment system built using the material circulation and energy flow of plants, microorganisms and substrates in the ecosystem. Among them, microbial nitrification and denitrification are generally considered to be the mos...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34C02F3/30C02F7/00C02F101/16
CPCC02F3/32C02F3/348C02F3/006C02F7/00C02F3/303C02F3/305C02F2101/16C02F2103/007Y02W10/10
Inventor 董畔王凯朱辉刘爱宝孙信柏
Owner NANJING KESHENG ENVIRONMENTAL PROTECTION TECH