Processing device and processing method of nitrogen pollutant in secondary tail water of sewage treatment plant

A sewage treatment plant and treatment device technology, applied in the direction of water/sewage multi-stage treatment, illuminated water/sewage treatment, oxidized water/sewage treatment, etc.

Inactive Publication Date: 2012-07-18
XUZHOU UNIV OF TECH
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Problems solved by technology

[0007] Aiming at the many shortcomings of the current technology for deep removal of nitrogen pollutants in the secondary tail water of sewage treatme

Method used

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  • Processing device and processing method of nitrogen pollutant in secondary tail water of sewage treatment plant
  • Processing device and processing method of nitrogen pollutant in secondary tail water of sewage treatment plant

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Embodiment Construction

[0018] The structure and usage method of the device are described in conjunction with the accompanying drawings.

[0019] Such as figure 1As shown, the treatment device for nitrogen pollutants in the secondary tail water of the sewage treatment plant includes a treatment device housing 4, and an upper partition 71 with a mesh and a lower partition are respectively installed on the upper and lower parts of the treatment device housing 4 7. The upper and lower partitions are stainless steel mesh plates, which are mainly used to fix bamboo wire filler. The lower partition 7 divides the inside of the processing device housing 4 into the gas-water mixing zone 3 below the lower partition 7 and the main reaction zone 41 above the lower partition 7, in which a draft tube 5 is installed The main reaction zone is divided into an air-water upflow zone 51 inside the guide tube and a downflow zone 6 outside the tube; this embodiment is a cylinder or a square tube or a polygonal tube. In ...

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Abstract

The invention discloses a processing device and a processing method of nitrogen pollutant in secondary tail water of a sewage treatment plant, which belong to devices and methods for advanced sewage treatment. The processing device is vertically provided with a gas water mixing area, a main reaction area and a precipitation disinfection area from low to high. The volume ratio of the three areas is 1: 4.5-6.5: 1.5-2.5. First, air and the secondary tail water of the sewage treatment plate are pumped into the gas water mixing area for quick mixing, and then enter the main reaction area and form inner circulation current. Biological denitrification, mineralization of organics hard to degrade and the organic removing process are achieved in the main reaction area. Finally, water flows out from the main reaction area, precipitation and ultraviolet disinfection are conducted in the precipitation disinfection area, and the water is discharged from the device. Surplus sludge in the precipitation disinfection area is discharged at regular intervals from a sludge discharge port. The processing method has the advantage that the processing method is used for the denitrification process of water with low C/N ratio like the secondary tail water in the sewage treatment plant. The ammonia nitrogen removing rate can reach 35.2% to 47.8%, the total nitrogen removing rate achieves 55.2% to 72.8%,COD removing rate achieves 37.2% to 55.4% when a high resolution timer (HRT) goes from 5h-8h.

Description

technical field [0001] The invention belongs to sewage treatment equipment and methods, in particular to a treatment device and treatment method for nitrogen pollutants in the secondary tail water of a sewage treatment plant. It is mainly used for advanced treatment of nitrogen pollutants in the secondary tail water of sewage treatment plants. technical background [0002] With the acceleration of urbanization and the improvement of industrialization level, a large amount of domestic sewage and industrial wastewater are produced. In order to effectively prevent water pollution and protect the receiving water environment, major cities have invested a lot of money in the construction of urban sewage treatment plants. These sewage treatment plants usually use secondary biochemical treatment methods to treat municipal sewage, while conventional secondary The biochemical treatment process is a method whose main purpose is to remove organic matter and ammonia nitrogen, which lead...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/32C02F1/72
Inventor 曹文平
Owner XUZHOU UNIV OF TECH
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