Denitrification and dephosphorization device, establishing method thereof and denitrification and dephosphorization method for sewage

A technology for nitrogen and phosphorus removal and sewage, applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc.

Inactive Publication Date: 2018-11-13
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a sewage nitrogen and phosphorus removal device and a sewage nitrogen and

Method used

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  • Denitrification and dephosphorization device, establishing method thereof and denitrification and dephosphorization method for sewage
  • Denitrification and dephosphorization device, establishing method thereof and denitrification and dephosphorization method for sewage
  • Denitrification and dephosphorization device, establishing method thereof and denitrification and dephosphorization method for sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0097] 1. Fill the tank

[0098] like figure 1 As shown, the tank body of the denitrification and phosphorus removal device of the present invention is a cylinder, and its height-to-diameter ratio is 2:1, and the top of the body is provided with vent holes 10; the tank body is successively divided into the lower water distribution area, Bearing area, fill area and upper discharge area.

[0099] Among them, the height of the filling area is 70cm, and it is filled with sulfur particles, pyrite particles, zeolite and limestone, wherein the particle size of sulfur particles is 4-8mm, the particle size of pyrite is 4-8mm, and the particle size of zeolite is 4-8mm. The particle size of the limestone is 6-10mm, and the particle size of the limestone is 4-6mm. The volume fraction ratio of sulfur, pyrite, zeolite and limestone is 3:3:6:1; the porosity of the filler in the filler area is 30%;

[0100] The height of the supporting area is 10cm, which is filled with pebbles with a diame...

Embodiment 1A

[0116]In addition to step 3) in the denitrification and dephosphorization treatment step, the hydraulic retention time of the sewage in the device is controlled to be 4h. During the operation of the system, the temperature is maintained at 25-30°C, the pH of the influent is basically maintained at 7.3-7.6, and the DO is basically maintained at 1.8. Except between -2.2, all the other are identical with embodiment 1.

Embodiment 2

[0118] 1. Fill the tank

[0119] Same as Example 1.

[0120] 2. Hanging film treatment

[0121] 2-1), after concentrating the anaerobic activated sludge of municipal sewage treatment plant, make concentrated activated sludge, wherein the MLSS concentration of concentrated activated sludge is 18000-20000mg / L (preferably 19000mg / L);

[0122] 2-2) Fill the tank with concentrated activated sludge from top to bottom until the packing layer is completely submerged, and then soak for 1.5h (usually 1-2h);

[0123] 2-3) Then the sewage with the C / N ratio≤2 of the sewage treatment plant is introduced into the water distribution area from the water inlet at the bottom of the tank body of the device of the present invention, and the water flows upwards, flows through the supporting area, the packing area, and enters the water outlet area Finally, it flows out through the water outlet on the upper part of the tank, and the hydraulic retention time is controlled to 6h (usually 5-7h) by ad...

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Abstract

The invention discloses a denitrification and dephosphorization device, an establishing method thereof and a denitrification and dephosphorization method for sewage by using the device. The device comprises a tank body and a water distribution area, a bearing area, a filling area and a water outlet area which are installed in the tank body. The water distribution area, the bearing area, the filling area and the water outlet area are successively arranged in the tank body from bottom to top. The denitrification and dephosphorization device is simple in structure, and easy to operate. The deviceis used for treating the sewage, the cost is low, a removal rate of nitrogen and phosphorus in the sewage is high, and the nitrogen and phosphorus removal effect is stable, and the device is particularly suitable for deep denitrification and dephosphorization treatment of the sewage in a low carbon nitrogen ratio.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment device and treatment method, in particular to a sewage nitrogen and phosphorus removal device and a nitrogen and phosphorus removal method. Background technique [0002] With the acceleration of urbanization and the improvement of people's living standards, the amount of urban sewage discharge is also increasing rapidly, and a large amount of untreated sewage is discharged randomly, resulting in increasingly serious pollution of surface water bodies. Urban sewage is one of the main sources of urban water environment pollution, and the treatment and resource utilization of urban sewage is imminent. At present, among the processes adopted by urban sewage plants in our country, various activated sludge methods are still the mainstream. The treatment of traditional domestic sewage is mainly divided into physical, chemical and biological method...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F1/42
CPCC02F1/42C02F3/2806C02F2001/425C02F2003/001
Inventor 王洪杰李棒李莹莹宋孟
Owner BEIJING FORESTRY UNIVERSITY
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