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High-efficiency oxidation ditch biological sewage treatment method and system

A sewage biological treatment and oxidation ditch technology, applied in sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve sludge deposition, affect the performance of oxidation ditch sewage biological treatment system, and fully Low oxygen efficiency and other issues, to achieve the effect of high channel flow velocity, good mixing effect and reduced total energy consumption

Inactive Publication Date: 2008-05-07
UNIV OF SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing orbal oxidation ditch mainly adopts rotating disc or rotating brush aerators. The rotating brush and rotating disc aerators not only have low oxygenation efficiency, but also tend to produce low-speed zones under the rotating brush and rotating disc equipment, resulting in pollution. Mud deposition seriously affects the performance of oxidation ditch sewage biological treatment system

Method used

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  • High-efficiency oxidation ditch biological sewage treatment method and system
  • High-efficiency oxidation ditch biological sewage treatment method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: As shown in Figure 1, the annular oxidation ditch 4 and 5 surrounded by walls 1, 2 and 3, the low-speed surface aerator 6 is installed on the middle wall 2, and the mixed liquid of sewage and sludge passes through the water inlet 7 Enter the oxidation ditch 4, enter the oxidation ditch 5 through the aerator 6, and discharge through the water outlet 8. When the aerator is working, it rotates clockwise to provide dissolved oxygen, and at the same time pushes the water in the oxidation ditch 4 to flow clockwise. The water flows counterclockwise. Complete the sewage aerobic treatment process.

Embodiment 2

[0023] Embodiment 2: as shown in Figure 2, the ring-shaped oxidation ditch 4 and 5 that are surrounded by wall 1, 2 and 3, aerator 6 is installed in the middle of oxidation ditch 4 and 5, deflector 9 is equipped with on the periphery, sewage and The sludge mixture enters the oxidation ditch 4 through the water inlet 7, enters the oxidation ditch 5 through the hole 10 in the middle partition wall, and is sent out through the water outlet 8. When the aerator 6 is working, it rotates clockwise to provide dissolved oxygen and promote the oxidation ditch The water flow in 4 and 5 flows clockwise, and the sewage aerobic treatment process is completed in the oxidation ditch.

example example 3

[0024] Example 3: As shown in Figure 3 and Figure 4, the ring-shaped oxidation ditch 4 and 5 surrounded by walls 1, 2 and 3, the aerator 6 is installed on the middle wall 2, and the mixed liquid of sewage and sludge passes through the water inlet 7 enters the oxidation ditch 4, enters the oxidation ditch 5 through the aerator 6, and sends out through the water outlet 8. When the aerator is working, it rotates clockwise to provide dissolved oxygen, and at the same time promotes the water flow in the oxidation ditch 5 to flow clockwise, and the oxidation ditch 4 The inner water flows counterclockwise. There are two 90-degree arc deflectors 11 and 12 installed around the aerator, which are respectively installed on the two oxidation ditch. The height of the deflector is equal to the height of the impeller of the aerator. level with the water. Add two so that when the water flow leaves the aerator, the flow direction is directed to the flow direction of the channel, increasing th...

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Abstract

The invention discloses a high-efficient oxidation gouge sewage organism treating method and a system which comprise a ring shape oxidation gouge with at least two gouge paths, a low speed surface aerator, a water inlet and a water outlet. A partition is arranged between the adjacent gouge paths; the low speed aerator is arranged on the partition shared by the adjacent gouge paths of the oxidation gouge; the two sides of the partition out of the impeller of the aerator are respectively provided with an arc flow guiding board at the corresponding position; or the low speed surface aerator is arranged in the gouge paths of the oxidation gouge; at the same time, the side of the impeller of the aerator near the gouge path wall of the oxidation gouge is provided with a semicircular flow guiding board. The gouge path system of the oxidation gouge adopts the oxidation gouge formed by concentric circle walls with comparatively smaller resistance loss with big gouge path flowing speed, good mixing effect and no need of adding mixing apparatus; at the same time, the low speed surface aerator is adopted, and the aeration efficiency is high.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to the technical field of sewage biological treatment oxidation ditch. Background technique [0002] Industrial wastewater and domestic sewage are discharged into natural water bodies, causing serious environmental pollution. Therefore, at present, sewage biological treatment technology is mainly used as the core method for treatment to reduce the content of organic matter and nutrient salts in sewage. Oxidation ditch sewage biological treatment technology is to oxidize, absorb or decompose organic matter and nutrient salts through activated sludge in an annular ditch. Dissolved oxygen is usually provided by aeration equipment, and at the same time, the fluid is pushed to flow in the channel, so that the sludge, sewage and dissolved oxygen are fully mixed to realize the biodegradation of sewage. In the usual sewage biological treatment system, the oxygenation and aeration system con...

Claims

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Application Information

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IPC IPC(8): C02F3/14
CPCY02W10/10
Inventor 黄卫东勾全增王颖哲王淦胡天媛张羽谢荣焕
Owner UNIV OF SCI & TECH OF CHINA
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