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Sewage total-nitrogen processing apparatus and method thereof

A nitrogen treatment and sewage technology, applied in the field of sewage total nitrogen treatment devices, can solve the problems of insufficient proportion of raw water carbon source and nitrogen source, no denitrification anaerobic unit, and low denitrification efficiency, and achieve high total nitrogen removal efficiency, Reduce the amount of aeration and achieve the effect of sludge reduction

Inactive Publication Date: 2017-04-05
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The denitrification efficiency is not high
[0007] 2. Vulnerable to impact when raw water quality fluctuates
[0008] 3. Using the water pump to return the mixed liquid, the operating cost increases
[0009] 4. The proportion of carbon source and nitrogen source in the raw water is insufficient, and the denitrification effect is limited
[0010] 5. The filler added to enhance the nitrogen removal effect will easily cause the waterway to stop and reduce the enhancement effect
If the packing is in a fluidized state, a large energy consumption is required
[0011] 6. There is a lot of residual sludge and the treatment cost is high
[0012] 7. The denitrification anaerobic unit was not set up when the sewage treatment system was established, and there were problems of land occupation and infrastructure investment in increasing the denitrification function

Method used

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  • Sewage total-nitrogen processing apparatus and method thereof
  • Sewage total-nitrogen processing apparatus and method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] At first the device provided by the present invention is illustrated in conjunction with the accompanying drawings:

[0039] Such as figure 1 , figure 2 As shown, the sewage total nitrogen treatment device provided by the present invention includes the first biochemical reaction tank 1, the first settling tank 2, the second biochemical reaction tank 3, the second settling tank 4, the sludge carbon source converter 5 and supporting Sludge return control system; wherein, the first biochemical reaction tank 1, the first settling tank 2, the second biochemical reaction tank 3 and the second settling tank 4 are arranged in sequence, and the first biochemical reaction tank 1 and the second biochemical reaction tank 3 There are several aeration devices 6, fillers 7, diversion tanks 8 and air level lifters 9 that can be controlled by individual valves respectively, wherein the water inlet end of the diversion tanks 8 is connected to the corresponding air level riser 9 Outlet...

Embodiment 2

[0043] The sewage total nitrogen treatment device of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0044] The method provided by the present invention is described in detail below in conjunction with accompanying drawing:

[0045] Using the present invention to treat oil refinery wastewater in a plant, with a water volume of 250m 3 / h, COD 200mg / L, total nitrogen 90mg / L, ammonia nitrogen 45mg / L, 200m 3 / h Sewage water enters through the inlet of the first biochemical reaction tank 1, adjust the switches of the aeration device 6, and control the first 1 / 3 area of ​​the first biochemical reaction tank 1 to be an anaerobic zone, and the dissolved oxygen is 0.5-1.0mg / L for For denitrification reaction, the last 2 / 3 area is an aerobic area, and the dissolved oxygen is 3.0-4.0mg / L for nitrification reaction. The air liquid level riser 9 returns 400% of the sewage sludge mixture at the outlet of the first biochemical reaction tank 1, and ...

Embodiment 3

[0047] The sewage total nitrogen treatment device of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0048] The method provided by the present invention is described in detail below in conjunction with accompanying drawing:

[0049] Using the present invention to treat chemical sewage, the water volume is 200m 3 / h, COD 200mg / L, total nitrogen 40mg / L, ammonia nitrogen 30mg / L, 150m 3 / h Sewage water enters through the inlet of the first biochemical reaction tank 1, adjust the switches of the aeration device, and control the first 1 / 2 area of ​​the first biochemical reaction tank 1 as an anaerobic zone, and the dissolved oxygen is 0.5-1.0mg / L for reaction Nitrification reaction, the latter 1 / 2 area is an aerobic area, and the dissolved oxygen is 3.0-4.0mg / L for nitrification reaction. The air liquid level riser 9 returns 300% of the sewage sludge mixture at the outlet of the first biochemical reaction tank 1, and the effluent enters th...

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Abstract

The invention relates to a sewage total-nitrogen processing apparatus and a method thereof, which belongs to the field of sewage processing. The sewage total-nitrogen processing apparatus comprises a first biochemical reaction tank, a first settling tank, a second biochemical reaction tank, a second settling tank, a sludge carbon source converter and a matched sludge backflow control system, several individual valve-controlled aeration apparatus, a filling material, a diversion trench and an air liquid level raiser are respectively arranged in the first biochemical reaction tank and the second biochemical reaction tank, a water inlet end of the diversion trench is positioned by corresponding a water outlet of the air liquid level raiser, and the backflow of outlet sewage / sludge mixed liquor is realized. The sewage total-nitrogen processing apparatus can enhance the total nitrogen removal effect of the biochemical reaction tank, and has COD removal effect, high-efficiency removal of COD, ammonia nitrogen and total nitrogen can be realized in one reaction tank, and the sewage total-nitrogen processing apparatus has the characteristics that the oxygen demand is little, power required by mixed liquor backflow is little, the removal efficiency is high, a structure is little by comparing with an A / O technology, water quality fluctuation is adapted, and the sludge output is little.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a sewage total nitrogen treatment device and method. Background technique [0002] With the increasingly stringent sewage discharge standards, the total nitrogen discharge indicators are becoming more and more stringent. The national environmental protection department stipulates that from January 1, 2017, the existing sewage treatment plants will implement the discharge standard of total nitrogen ≤ 30mg / L. The total nitrogen treatment method of most existing sewage treatment systems is biochemical treatment, that is, the total nitrogen is removed through anaerobic nitrification and oxygen-consuming denitrification of microorganisms. The nitrification process of microorganisms is the process of converting ammonia nitrogen into nitrite and nitrate, and the denitrification is the process of converting nitrite and nitrate into nitrogen gas. The removal effect of total nitrogen mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 梁明潘咸峰张广
Owner CHINA PETROLEUM & CHEM CORP
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