Pretreatment device for raw water of artificial wetland and pretreatment process for raw water of artificial wetland

A pretreatment device and artificial wetland technology, applied in water/sewage treatment, oxidized water/sewage treatment, water/sewage treatment equipment, etc., can solve problems such as blockage, achieve no flow loss, reduce land occupation, and save sewage Effect

Active Publication Date: 2016-05-04
HUBEI ZHONGBI ENVIRONMENTAL PROTECTION TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a pretreatment device and process for the raw water of the constructed wetland in view of the deficiencies in the above-mentioned prior art, which can remove the low-content ammonia nitrogen in the raw water while separating the suspended particles, effectively Solve the problem that existing artificial wetlands are prone to clogging when dealing with sewage with high suspended solids content

Method used

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  • Pretreatment device for raw water of artificial wetland and pretreatment process for raw water of artificial wetland
  • Pretreatment device for raw water of artificial wetland and pretreatment process for raw water of artificial wetland

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The artificial wetland pretreatment process using the above-mentioned device includes the following steps:

[0047] 1) Prepare the raw water with an ammonia nitrogen concentration of 20mg / L and a suspended particle concentration of 370mg / L, flow it tangentially into the above device at a flow rate of 12m / s, and flow through the spoiler to accelerate the flow rate of the raw water, changing from laminar flow to turbulent flow;

[0048] 2) The oxidizing agent is regularly added to the dosing port, and the amount of the oxidizing agent is controlled by the ammonia nitrogen content in the effluent reaching a specified value. In this embodiment, the oxidizing agent is sodium hypochlorite powder, and the dosage is 12 mg / L;

[0049] 3) When the raw water flows through the cylindrical separation chamber, the suspended particles with a higher density than the fluid can overcome the hydraulic resistance and move toward the central axis of the pretreatment device to form a central ...

Embodiment 2

[0052] The artificial wetland pretreatment process using the above-mentioned device includes the following steps:

[0053] 1) Prepare the raw water with an ammonia nitrogen concentration of 30mg / L and a suspended particle concentration of 540mg / L, flow it tangentially into the above device at a flow rate of 12m / s, and flow through the spoiler to accelerate the flow rate of the raw water, changing from laminar flow to turbulent flow;

[0054] 2) The oxidizing agent is regularly added to the injection port, and the amount of the oxidizing agent is controlled so that the ammonia nitrogen content in the effluent reaches a specified value. In this embodiment, the oxidizing agent is sodium hypochlorite powder, and the dosage is 16 mg / L;

[0055] 3) When the raw water flows through the cylindrical separation chamber, the suspended particles with a higher density than the fluid can overcome the hydraulic resistance and move toward the central axis of the pretreatment device to form a c...

Embodiment 3

[0058] The artificial wetland pretreatment process using the above-mentioned device includes the following steps:

[0059] 1) Prepare the raw water with an ammonia nitrogen concentration of 40mg / L and a suspended particle concentration of 610mg / L, flow it tangentially into the above device at a flow rate of 12m / s, and flow through the spoiler to accelerate the flow rate of the raw water, changing from laminar flow to turbulent flow;

[0060] 2) The oxidizing agent is regularly added to the injection port, and the amount of the oxidizing agent is controlled by the ammonia nitrogen content in the effluent reaching a specified value. In this embodiment, the oxidizing agent is sodium hypochlorite powder, and the dosage is 20 mg / L;

[0061] 3) When the raw water flows through the cylindrical separation chamber, the suspended particles with a higher density than the fluid can overcome the hydraulic resistance and move toward the central axis of the pretreatment device to form a centr...

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Abstract

The invention discloses a pretreatment device for raw water of an artificial wetland and a pretreatment process for raw water of the artificial wetland. Raw water of the artificial wetland enters the artificial wetland after being treated by the device. The pretreatment device comprises a barrel, an inlet, a spoiler, a deflecting plate, a vortex breaker, a drain outlet, a guide layer, an outlet and a dispensing opening; the barrel consists of an upper hollow cylinder I, a middle hollow inverted cone and a lower hollow cylinder II; and the inlet and the dispensing opening are formed in the top of the barrel, the drain outlet is formed in the bottom of the barrel, the spoiler, the deflecting plate and the vortex breaker are arranged on the inner wall of the barrel, and the outlet is formed in the side wall of the barrel. While the suspended particles in the water are separated, a function for removing the low content of ammonia and nitrogen in the raw water can be realized, so that the problem that the blockage is likely to happen when the sewage with relatively high content of suspended matters is treated for the existing artificial wetland can be efficiently solved.

Description

technical field [0001] The invention relates to a pretreatment device and process for artificial wetland raw water, belonging to the field of environmental protection. Background technique [0002] The artificial wetland filler consists of whetstone and soil, and the gravel is divided into two layers. Due to the presence of suspended impurities and organic debris in the influent, they will be trapped by the matrix or adsorbed to the surface of the matrix when passing through the constructed wetland, resulting in a gradual decrease in the porosity of the matrix. It will be very low, so that the sewage treatment efficiency will be greatly reduced, and blockage will occur. Therefore, often due to improper design, the effluent cannot meet the design requirements or cannot meet the discharge standards, and some constructed wetlands have become pollution sources instead. Therefore, when constructing wetlands to treat sewage with a high content of suspended solids, pretreatment f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/76
CPCC02F1/5281C02F1/76C02F2201/002C02F2301/024
Inventor 李孟张斌史艾华柳超颖
Owner HUBEI ZHONGBI ENVIRONMENTAL PROTECTION TECHCO
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