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

An ecosystem and pollution control technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor removal of nitrogen and phosphorus, large footprint, hydraulic retention Long time and other problems, to achieve the effect of uniform distribution, low operating costs, and strong resistance to ammonia nitrogen impact

Inactive Publication Date: 2003-10-08
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an economical and efficient compound wetland ecological method for treating storm runoff and sewage and wastewater, which can effectively overcome the poor removal effect of nitrogen and phosphorus in the prior art, long hydraulic retention time, large floor area, etc. Disadvantages, especially for ammonia nitrogen, it has a stable and efficient removal effect, and has strong impact resistance

Method used

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

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Embodiment approach

[0031] The composite wetland ecological method of nitrogen and phosphorus pollution control of the present invention makes full use of the hydrodynamic force of runoff or sewage and waste water, does not require energy consumption, and is in the form of push flow, such as figure 1 As shown, it flows through grit chamber 1, primary free surface constructed wetland 2, zeolite underflow wetland 3, and secondary free surface constructed wetland 4. The system can operate between the normal water level 5 and the highest water level 7, has a certain resistance to impact load, and is suitable for dealing with storm runoff.

[0032] Rainstorm runoff or sewage water flows into the grit chamber 1 to remove coarse particles and suspended matter. The setting of the grit chamber increases the system's ability to resist shock loads. The water flowing out of the grit chamber enters the first-level free surface wetland 2 through the water distribution weir 6 along the distribution channel 16, ...

specific Embodiment

[0039] A specific embodiment of the system of the present invention is as follows:

[0040] Rainstorm runoff flows into the grit chamber 1 through the grid, and the area of ​​the grit chamber is 900m 2 , the pool depth is 0.6m;

[0041] The water flowing out of the grit chamber flows into the first-class free-surface artificial wetland 2 with a design water depth of 0.2-0.4m and an aspect ratio ≥ 2:1 through the rectangular tooth-shaped concrete distribution weir 6 and distribution channel 16, and the residence time is ≥ 1.5h. The first-class free surface artificial wetland area is 4200m 2 , planting local dominant plants such as wild rice grass, reed, water peanut, calamus, and Polygonum rubrum on the wetland.

[0042] The water flowing out of the first-level free surface constructed wetland is introduced into the zeolite subsurface flow wetland, and the residence time is ≥1.0h. An anti-seepage layer is provided at the bottom of the zeolite subsurface wetland, with an aspe...

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Abstract

An ecological method using artifical marshland system for controlling N-P pollution includes such steps as sequentially flowing the rain or sewage in sand deposition pool, in stage-one free-surface artificial marshland (staying for more than 1.5 hr), in zeolite undercurrent marshland containing zeolite and cinder (staying for more than 1 hr), and in stage-two free-surface artificial marshland (staying for more than 8 hr). Its advantage is high effect.

Description

technical field [0001] The invention relates to a high-efficiency composite wetland ecological method and system for nitrogen and phosphorus pollution control, which belongs to the technical field of artificial wetland water treatment methods and processes, and can be widely used in cities, villages and towns, and farmlands with strong impact and large flow. Rainstorm runoff treatment of nitrogen, phosphorus and suspended solids, and sewage and wastewater treatment. Background technique [0002] In 1977, German scholar Kickuth R. proposed The Root-Zone Method, which laid the theoretical foundation for wetland wastewater treatment. Since then, scholars from various countries have carried out extensive theoretical and applied research on constructed wetlands. The sewage treatment technology of constructed wetlands has the advantages of high efficiency, low investment, low operating costs, low maintenance technology, and low energy consumption (Andrew Wood, Constructed wetlands...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 张旭李广贺周琪张荣社李旭东薛玉史云鹏唐翀鹏
Owner TSINGHUA UNIV
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