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Method for constructing device for removing nitrogen and phosphorus from sewage, device for removing nitrogen and phosphorus and method for removing nitrogen and phosphorus

A technology for nitrogen and phosphorus removal and construction method, which is applied in the field of nitrogen and phosphorus removal devices for sewage, and can solve problems such as increased treatment costs, secondary pollution, and low carbon-to-nitrogen ratio

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

Therefore, the denitrification of urban sewage treatment plants is becoming more and more important. However, at present, urban sewage treatment plants have the problem of low carbon-to-nitrogen ratio, which has become an important factor restricting the efficiency of biological denitrification. Sewage plants often use the method of adding carbon sources Enhanced denitrification, this treatment method has a better treatment effect, but there are also problems such as increased treatment costs, difficult control, and easy to cause secondary pollution

Method used

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  • Method for constructing device for removing nitrogen and phosphorus from sewage, device for removing nitrogen and phosphorus and method for removing nitrogen and phosphorus
  • Method for constructing device for removing nitrogen and phosphorus from sewage, device for removing nitrogen and phosphorus and method for removing nitrogen and phosphorus
  • Method for constructing device for removing nitrogen and phosphorus from sewage, device for removing nitrogen and phosphorus and method for removing nitrogen and phosphorus

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Embodiment 1

[0120] 1. Fill the tank

[0121] Such as figure 1 As shown, the tank body of the denitrification and dephosphorization device of the present invention is a cuboid, and the top of the tank body of the denitrification and dephosphorization tank is provided with an exhaust port; in the tank body, it is divided into an upper packing area, a supporting area, and a lower part from top to bottom. packing area. The water outlet tank is arranged on the right side of the tank body, the bottom of the water outlet tank is connected with the lower part of the tank body, and the purified outlet water in the tank body after passing through the upper and lower packing layers flows into the water outlet tank from the overflow port, and then is discharged from the upper part of the water outlet tank.

[0122] Wherein, the height inside the tank body of the denitrification and phosphorus removal tank is 100cm, wherein the height of the upper filling area is 30cm, and the upper filling is a mixt...

Embodiment 1A

[0137] 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

[0139] 1. Fill the tank

[0140] Same as Example 1.

[0141] 2. Hanging film treatment

[0142] 2-1), after the anaerobic activated sludge and the aerobic activated sludge of the municipal sewage treatment plant are respectively concentrated, the concentrated activated sludge is made, wherein the MLSS concentration of the concentrated activated sludge is 18000-20000mg / L (preferably 19000mg / L);

[0143] 2-2) Inject anaerobic activated sludge into the lower filling area of ​​the tank, inject aerobic activated sludge into the upper filling area until the filling layer is completely submerged, then turn on the aerator and control the aeration rate to 1L / min (usually 1-2L / min) and then soak for 1.5h (usually 1-2h);

[0144] 2-3) After soaking, the sewage with the C / N ratio≤2 of the sewage treatment plant is injected from the water inlet on the top of the tank body of the device of the present invention, and the water flow is downward flow, flowing through the upper packing area,...

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Abstract

The invention discloses a method for constructing a device for removing nitrogen and phosphorus from sewage, the device for removing nitrogen and phosphorus and a method for removing nitrogen and phosphorus from sewage by the device. The method for constructing the device comprises the steps of filling a tank and performing biofilm culturing treatment on the tank after filling. The device used forremoving nitrogen and phosphorus from the sewage and constructed with the method is simple in structure and easy to operate, cost of sewage treatment based on the device is low, the removal rate of nitrogen and phosphorus in the sewage is high, nitrogen and phosphorus removing effect is stable, and the device is particularly suitable for deep nitrogen and phosphorus removing treatment of the sewage with low carbon-nitrogen ratio and high influent ammonia nitrogen.

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): C02F3/30C02F101/16C02F101/10
CPCC02F3/301C02F3/308C02F2305/06C02F2101/16C02F2101/166C02F2101/105
Inventor 王洪杰李棒李莹莹宋孟
Owner BEIJING FORESTRY UNIVERSITY
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