CN218910036U - Secondary denitrification treatment domestic sewage device - Google Patents
Secondary denitrification treatment domestic sewage device Download PDFInfo
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- CN218910036U CN218910036U CN202223211196.8U CN202223211196U CN218910036U CN 218910036 U CN218910036 U CN 218910036U CN 202223211196 U CN202223211196 U CN 202223211196U CN 218910036 U CN218910036 U CN 218910036U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The device is of a rectangular box structure, and comprises an anaerobic unit, a first anoxic unit, a first aerobic unit, an intermediate water tank, a second aerobic unit, a second anoxic unit and a membrane tank which are communicated through communication holes in turn along the water flow direction, wherein a water inlet pipe is arranged on the anaerobic unit, and the bottom of the anaerobic unit is communicated with the first anoxic unit; the bottom of the first anoxic unit is communicated with the first aerobic unit, and the bottom of the first aerobic unit is provided with an aeration plate; the top end of the upper part of the first aerobic unit is communicated with a middle water tank, the bottom of the middle water tank is communicated with the second aerobic unit, and the bottom of the second aerobic unit is provided with a microporous aeration plate; the lower part of the second aerobic unit is communicated with the second anoxic unit, and the upper part of the second anoxic unit is communicated with the membrane tank; a membrane filter is arranged in the membrane tank, and the wastewater is pumped and discharged through the membrane filter after being purified. The device has the characteristics of simple structure and good treatment effect.
Description
Technical Field
The utility model relates to a water treatment device which is mainly used for treating high-concentration nitrogen-containing sewage.
Background
Along with the high-speed development of social economy, the domestic sewage quantity is improved year by year, and the sewage discharge standard of China is also stricter, and domestic sewage can be discharged after reaching the standard. For the treatment mode of domestic sewage with high total nitrogen content, the traditional process can only be carried out by adopting the mode of increasing the volume of a treatment unit and reducing the treatment load, but the mode can increase the early construction and equipment investment, and the treatment efficiency is low. It is a hot spot of current research to develop a nitrogen removal treatment apparatus that is inexpensive and has high treatment efficiency.
The prior patent (application number: CN 201620379538.2) discloses a denitrification and dephosphorization treatment system for urban domestic sewage with low carbon nitrogen ratio, which comprises an anaerobic tank and an anoxic tank, wherein the water inlet of the anaerobic tank and the anoxic tank are connected with a sewage inflow pipeline of the system, and the water outlet of the anoxic tank and the water inlet of the aerobic reaction tank are connected through a pipeline; the bottom of the aerobic reaction tank is provided with a sludge mixed liquid reflux pipeline which is respectively connected with water inlets of the anaerobic tank and the anoxic tank; the bottom of the aerobic reaction tank is provided with a compressed air input pipe, the aerobic reaction tank is also internally provided with an MBR separation membrane, and the water outlet of the MBR separation membrane is connected with a water outlet pipe of the system. The utility model has low cost and good water treatment effect, and particularly has high removal rate of nitrogen and phosphorus elements and organic matters in sewage with low carbon nitrogen ratio and small residual sludge. The mode of overlapping the membrane tanks by the processes of the anaerobic tank, the anoxic tank and the aerobic tank is difficult to play a role on the wastewater with high total nitrogen content.
Disclosure of Invention
The utility model aims to provide a domestic sewage treatment device with simple structure and good treatment effect, aiming at the defects of the prior art device.
The secondary denitrification domestic sewage treatment device is of a rectangular box body structure, and comprises an anaerobic unit, a first anoxic unit, a first aerobic unit, a middle water tank, a second aerobic unit, a second anoxic unit and a membrane tank which are communicated through communication holes in sequence along the water flow direction, wherein a water inlet pipe is arranged on the anaerobic unit, the bottom of the anaerobic unit is communicated with the first anoxic unit, and a stirrer is respectively arranged inside the anaerobic unit and the first anoxic unit; the bottom of the first anoxic unit is communicated with the first aerobic unit, the bottom of the first aerobic unit is provided with an aeration plate, and the aeration plate is connected with an external fan through a vent pipe; the top end of the upper part of the first aerobic unit is communicated with the middle water tank, the bottom of the middle water tank is communicated with the second aerobic unit, the bottom of the second aerobic unit is provided with a microporous aeration plate, and the microporous aeration plate is connected with an external fan through a breather pipe; the lower part of the second aerobic unit is communicated with the second anoxic unit, and the upper part of the second anoxic unit is communicated with the membrane tank; a membrane filter is arranged in the membrane tank, and the wastewater is pumped and discharged through the membrane filter after being purified.
The wastewater enters the anaerobic unit and then is mixed with muddy water mixed liquid which flows back from the first aerobic unit and the second anoxic unit to release phosphorus, the stirrer is started to perform mixing stirring, then the wastewater flows into the first anoxic unit to perform denitrification reaction, partial nitrate nitrogen is converted into nitrogen to be discharged, the nitrogen is discharged and flows into the first aerobic unit, the fan is started to perform blast aeration on the aerobic unit to remove ammonia nitrogen, then the wastewater flows into the second aerobic unit to remove ammonia nitrogen after flowing through the middle water tank, then flows into the second anoxic unit to perform denitrification reaction again to remove nitrogen, finally flows into the membrane tank, and the purified water is pumped and discharged by the membrane filter.
Further, the bottoms of the first aerobic unit and the second anoxic unit are in cone hopper structures, the bottoms of the cone hoppers are communicated with the anaerobic unit through a backflow pipeline, and a backflow pump is arranged on the pipeline of the backflow pipeline.
Further, the bottom plate of the anaerobic unit is of an inclined plane structure with a water inlet end higher than a water outlet end lower than the water inlet end, and the included angle between the bottom plate and the horizontal plane is 30%.
Further, the bottom of the first anoxic unit is of an inclined plane structure with a water inlet end higher than a water outlet end lower than the water inlet end, and the included angle between the first anoxic unit and the horizontal plane is 10 percent.
Further, a multi-way valve is arranged on the return pipe connected with the cone hopper at the bottom of the second anoxic unit, and a pipeline is connected to the valve and used for discharging the residual sludge in the device.
Further, a butterfly valve is arranged on the water inlet pipe.
Furthermore, the membrane component in the membrane filter adopts a microfiltration membrane, so that the investment and maintenance cost is reduced.
Further, spherical filler is put into the second anoxic unit for cultivating and fixing denitrifying bacteria.
The beneficial effects of the utility model are as follows:
1. the secondary denitrification is carried out by an activated sludge process, so that nitrogen-containing substances in the wastewater can be greatly reduced.
2. The carbon-nitrogen ratio of the secondary denitrification is improved by supplementing a carbon source, so that the total nitrogen in the wastewater can be basically degraded.
3. And the microfiltration membrane is adopted for final sewage filtration, so that the early investment and the later operation cost can be effectively reduced.
Drawings
Fig. 1 is a schematic diagram of the structure of the utility model.
In the figure: 1 anaerobic unit, 1-1 water inlet pipe, 1-2 butterfly valve, 2 first anoxic unit, 3 first aerobic unit, 3-1 aeration plate, 4 middle water tank, 4-1 carbon source adding device, 5 second aerobic unit, 5-1 microporous aeration plate, 6 second anoxic unit, 6-1 spherical filler, 7 membrane tank, 7-1 membrane filter, 8 fan, 9 stirrer, 10 multidirectional valve, 11 reflux pump, 12 vent pipe, 13 reflux pipe.
Detailed Description
Example 1: as shown in figure 1, the secondary denitrification domestic sewage treatment device is of a rectangular box structure, and comprises an anaerobic unit 1, a first anoxic unit 2, a first aerobic unit 3, an intermediate water tank 4, a second aerobic unit 5, a second anoxic unit 6 and a membrane tank 7 which are communicated through communication holes in sequence along the water flow direction, wherein a water inlet pipe 1-1 is arranged on the anaerobic unit 1, and a butterfly valve 1-2 is arranged on the water inlet pipe 1-1; the bottom plate of the anaerobic unit 1 is of an inclined plane structure with a water inlet end higher than a water outlet end lower than the water inlet end, and the included angle between the bottom plate and the horizontal plane is 30%; the bottom of the anaerobic unit 1 is communicated with the first anoxic unit 2, and a stirrer 9 is arranged inside the anaerobic unit 1 and the first anoxic unit 2; the bottom of the first anoxic unit 2 is of an inclined plane structure with a water inlet end higher than a water outlet end and a low water outlet end, and the included angle between the inclined plane structure and the horizontal plane is 10 degrees; the bottom of the first anoxic unit 2 is communicated with the first aerobic unit 3, the bottom of the first aerobic unit 3 is provided with an aeration plate 3-1, and the aeration plate 3-1 is connected with an external fan 8 through a breather pipe 12; the top end of the upper part of the first aerobic unit 3 is communicated with the middle water tank 4, the bottom of the middle water tank 4 is communicated with the second aerobic unit 5, the bottom of the second aerobic unit 5 is provided with a microporous aeration plate 5-1, and the microporous aeration plate 5-1 is connected with an external fan 8 through a breather pipe 12; the lower part of the second aerobic unit 5 is communicated with a second anoxic unit 6, and the upper part of the second anoxic unit 6 is communicated with a membrane tank 7; the bottoms of the first aerobic unit 2 and the second anoxic unit 6 are in cone hopper structures, the bottoms of the cone hoppers are communicated with the anaerobic unit 1 through a return pipe 13, and a return pump 11 is arranged on the pipe of the return pipe 13; spherical filler 6-1 is put in the second anoxic unit 6; a multi-way valve 10 is arranged on a return pipe 13 connected with a cone hopper at the bottom of the second anoxic unit 6, and a pipeline is connected with the valve; a membrane filter 7-1 is arranged in the membrane tank 7, a membrane component in the membrane filter 7-1 adopts a microfiltration membrane, and wastewater is pumped and discharged through the membrane filter 7-1 after being purified.
After entering the anaerobic unit 1, the wastewater is mixed with mud-water mixed liquid which flows back from the first aerobic unit 3 and the second anoxic unit 6 to release phosphorus, the stirrer 9 is started to perform mixing stirring, then the wastewater flows into the first anoxic unit 2 to perform denitrification reaction, part of nitrate nitrogen is converted into nitrogen to be discharged, then the nitrogen flows into the first aerobic unit 3, the fan 8 is started to perform blast aeration on the aerobic units to remove ammonia nitrogen, then the wastewater flows into the second aerobic unit 5 after flowing through the intermediate water tank 4 to remove ammonia nitrogen again, then flows into the second anoxic unit 6 to perform denitrification reaction again to remove nitrogen, finally flows into the membrane tank 7, and the purified water is pumped and discharged by the membrane filter 7-1.
Claims (8)
1. The utility model provides a secondary denitrification treatment domestic sewage device, is rectangle box structure, its characterized in that: the anaerobic unit is provided with a water inlet pipe, the bottom of the anaerobic unit is communicated with the first anoxic unit, and a stirrer is respectively arranged in the anaerobic unit and the first anoxic unit; the bottom of the first anoxic unit is communicated with the first aerobic unit, the bottom of the first aerobic unit is provided with an aeration plate, and the aeration plate is connected with an external fan through a vent pipe; the top end of the upper part of the first aerobic unit is communicated with the middle water tank, the bottom of the middle water tank is communicated with the second aerobic unit, the bottom of the second aerobic unit is provided with a microporous aeration plate, and the microporous aeration plate is connected with an external fan through a breather pipe; the lower part of the second aerobic unit is communicated with the second anoxic unit, and the upper part of the second anoxic unit is communicated with the membrane tank; a membrane filter is arranged in the membrane tank, and the wastewater is pumped and discharged through the membrane filter after being purified.
2. A secondary denitrification treatment apparatus for domestic sewage according to claim 1, wherein: the bottoms of the first aerobic unit and the second anoxic unit are in cone hopper structures, the bottoms of the cone hoppers are communicated with the anaerobic unit through a return pipeline, and a return pump is arranged on the pipeline of the return pipeline.
3. A secondary denitrification treatment apparatus for domestic sewage according to claim 1, wherein: the bottom plate of the anaerobic unit is of an inclined plane structure with a water inlet end higher than a water outlet end and a water level, and the included angle between the bottom plate and the horizontal plane is 30%.
4. A secondary denitrification treatment apparatus for domestic sewage according to claim 1, wherein: the bottom of the first anoxic unit is of an inclined plane structure with a water inlet end higher than a water outlet end and a water level, and the included angle between the first anoxic unit and the horizontal plane is 10%.
5. A secondary denitrification treatment apparatus for domestic sewage according to claim 1, wherein: the backflow pipe connected with the cone hopper at the bottom of the second anoxic unit is provided with a multidirectional valve, and the valve is connected with a pipeline.
6. A secondary denitrification treatment apparatus for domestic sewage according to claim 1, wherein: the water inlet pipe is provided with a butterfly valve.
7. A secondary denitrification treatment apparatus for domestic sewage according to claim 1, wherein: the membrane component in the membrane filter adopts a microfiltration membrane.
8. A secondary denitrification treatment apparatus for domestic sewage according to claim 1, wherein: spherical filler is put in the second anoxic unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223211196.8U CN218910036U (en) | 2022-12-01 | 2022-12-01 | Secondary denitrification treatment domestic sewage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223211196.8U CN218910036U (en) | 2022-12-01 | 2022-12-01 | Secondary denitrification treatment domestic sewage device |
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| Publication Number | Publication Date |
|---|---|
| CN218910036U true CN218910036U (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223211196.8U Active CN218910036U (en) | 2022-12-01 | 2022-12-01 | Secondary denitrification treatment domestic sewage device |
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| CN (1) | CN218910036U (en) |
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2022
- 2022-12-01 CN CN202223211196.8U patent/CN218910036U/en active Active
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