CN212292994U - Sewage treatment device for enhancing nitrogen and phosphorus removal - Google Patents
Sewage treatment device for enhancing nitrogen and phosphorus removal Download PDFInfo
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- CN212292994U CN212292994U CN202020514888.1U CN202020514888U CN212292994U CN 212292994 U CN212292994 U CN 212292994U CN 202020514888 U CN202020514888 U CN 202020514888U CN 212292994 U CN212292994 U CN 212292994U
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Abstract
The utility model discloses a sewage treatment device for strengthening denitrification and dephosphorization, which comprises an anaerobic zone, an anoxic zone, an aerobic MBBR zone and an aerobic reaction zone which are communicated in sequence; the anaerobic/anoxic zone and the aerobic MBBR zone are separated by a partition wall, and the aerobic MBBR zone and the aerobic reaction zone are separated by an interception screen; stirring devices are arranged in the anaerobic zone and the anoxic zone; suspended fillers are added into the aerobic MBBR area, and an aeration system is arranged at the bottom of the aerobic MBBR area; the aerobic reaction zone is provided with a reflux pump, a residual sludge pump and a decanting device, and the bottom of the aerobic reaction zone is provided with an aeration system; the aerobic reaction zone is connected with the anaerobic/anoxic zone through a return pipe, and the mixed liquid in the aerobic reaction zone is returned to the anaerobic/anoxic zone through a return pump. The utility model discloses can solve area that traditional device exists big, economic benefits is poor and treatment effeciency low grade technical problem.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to an SBR process technology for strengthening nitrogen and phosphorus removal.
Background
The SBR process has the advantages of flexible operation mode, low energy consumption, land saving, low investment and operation cost and the like, and is widely applied to domestic urban sewage treatment plants of various scales. The traditional SBR process is mainly a single sludge suspension growth system, the mixed microbial population in the same reactor is utilized to complete the oxidation, nitrification, denitrification and phosphorus removal of organic matters, heterotrophic bacteria, phosphorus accumulating bacteria, nitrifying bacteria and denitrifying bacteria existing in the system compete in various aspects such as sludge age, carbon source, dissolved oxygen and the like, and the treatment effect of the traditional SBR process is limited in practical application. With the increase of the protection of the natural water body in China, in the face of increasingly strict discharge standards, the SBR process generally has the problems of the standard reaching risk of nitrogen and phosphorus in the effluent and the like, the upgrading and modification of the process become the hot point of industrial research, a new process is urgently needed, the nitrogen and phosphorus removal capability of the existing SBR system is enhanced, and the SBR system has more advantages particularly under the condition of extremely limited newly added land.
Some newly-built sewage treatment plants also face the problems of high emission standard, insufficient land use, limited investment and the like, and an economical, land-saving and efficient nitrogen and phosphorus removal process is urgently needed.
Disclosure of Invention
The utility model aims at providing an strengthen sewage treatment plant of nitrogen and phosphorus removal to solve the technical problem such as area that traditional device exists is big, economic benefits is poor and the treatment effeciency is low.
A sewage treatment device for enhancing nitrogen and phosphorus removal comprises an anaerobic zone, an anoxic zone, an aerobic MBBR zone and an aerobic reaction zone which are sequentially communicated; the anaerobic/anoxic zone and the aerobic MBBR zone are separated by a partition wall, and the aerobic MBBR zone and the aerobic reaction zone are separated by an interception screen; stirring devices are arranged in the anaerobic zone and the anoxic zone; suspended fillers are added into the aerobic MBBR area, and an aeration system is arranged at the bottom of the aerobic MBBR area; the aerobic reaction zone is provided with a reflux pump, a residual sludge pump and a decanting device, and the bottom of the aerobic reaction zone is provided with an aeration system; the aerobic reaction zone is connected with the anaerobic/anoxic zone through a return pipe, and the mixed liquid in the aerobic reaction zone is returned to the anaerobic/anoxic zone through a return pump.
The partition wall between the anoxic zone and the aerobic MBBR zone is made of stainless steel, and the partition wall has a water distribution uniformity function.
And a stirring device is arranged in the aerobic MBBR zone.
And a reflux pump in the aerobic reaction zone is adjusted by frequency conversion.
The utility model discloses an advantage and positive effect:
1. the utility model discloses carbon source high-usage. In the water inlet stage, the reflux pump and the stirring device fully mix the nitrifying liquid and the inlet water in the reactor, and under the condition of extremely low dissolved oxygen, organic matters in the inlet water are utilized to the maximum extent for denitrification and phosphorus absorption by phosphorus accumulating bacteria, so that the consumption of the dissolved oxygen on carbon sources is reduced, the quantity of external carbon sources is saved, and the cost is saved.
2. As more organic matters are removed in the denitrification stage, the demand of the aerobic stage on oxygen is reduced, and the power consumption in the aeration stage can be saved.
3. The utility model discloses an aerobic MBBR district is thrown and is thrown suspension filler, the nitrifying flora of the long mud age of enrichment, and then the extension nitrobacteria sludge age, and the system nitration ability is reinforceed, improves system shock load resistance and denitrogenation ability.
4. The utility model discloses need not to build the sedimentation tank, the using area wisely, the investment is economized, is applicable to the newly-built sewage treatment plant that the using area is nervous.
5. The utility model is suitable for a current SBR technology is carried mark and is reformed transform, need not newly-built cell body and can improve COD, BOD, NH3The removal rate of N, TN and TP is short, the modification period is short, and the influence on the operation of the existing water plant is small.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Fig. 2 is a schematic cross-sectional view of the present invention.
Numbering in the figures: 1. an anaerobic zone, 2 an anoxic zone, 3 an aerobic MBBR zone, 4 an aerobic reaction zone, 5 a stirring device, 6 a partition wall, 7 an aeration system, 8 a suspension filler, 9 an interception screen, 10 a residual sludge pump, 11 a decanter, 12 an internal reflux pump, 13 an internal reflux pipeline.
Detailed Description
The invention will be described in further detail with reference to the following detailed description of embodiments and with reference to the accompanying drawings:
as shown in fig. 1 and 2, an enhanced nitrogen and phosphorus removal SBR device comprises an anaerobic zone 1, an anoxic zone 2, an aerobic MBBR zone 3 and an aerobic reaction zone 4 which are sequentially communicated, wherein the anoxic zone 2 and the aerobic MBBR zone 3 are separated by a partition wall 6, and the aerobic MBBR zone 3 and the aerobic reaction zone 4 are separated by an interception screen 9; stirring devices 5 are arranged in the anaerobic zone 1 and the anoxic zone 2; suspension filler 8 is added into the aerobic MBBR area 3, and an aeration system 7 is arranged at the bottom of the aerobic MBBR area; the aerobic reaction zone 4 is provided with an internal reflux pump 12, a residual sludge pump 10 and a decanting device 11, and the bottom part is provided with an aeration system 7; the aerobic reaction zone 4 is connected with the anaerobic zone 1 through an internal reflux pipeline 13, and the mixed liquid in the aerobic reaction zone 4 is refluxed to the anaerobic zone 1 through an internal reflux pump 12.
As a further description of the device, the partition wall 6 between the anoxic zone 2 and the aerobic MBBR zone 3 can be made of stainless steel, and the partition wall needs to have a water distribution uniformity function, so that the construction period can be shortened when the stainless steel partition wall is used for upgrading and transforming the existing SBR process; the aerobic MBBR area 3 can be provided with a stirring device 5, and the denitrification efficiency is improved through stirring; the internal reflux pump 12 of the aerobic reaction zone 4 can adopt a variable frequency regulation mode, and the internal reflux ratio is adjusted according to the actual water quality of inlet water, so that the power consumption is saved.
The invention is further described below by means of specific application examples.
The existing sewage treatment plant adopts a CAST device, and the treatment scale is 15 ten thousand meters3D, the effluent quality is the pollutant discharge standard (GB) of urban sewage treatment plant18918 and 2002), and the standard A of pollutant emission Standard (GB18918-2002) of urban Sewage treatment plants is required to be executed by upgrading and transforming the effluent. The current plant area is limited in land and does not have the condition of newly adding a denitrification unit. The improvement is marked and is reformed transform and is adopted the utility model discloses strengthen SBR device of nitrogen and phosphorus removal, this project is reformed transform back reaction tank process design parameter as shown in table 1, and the operating cycle is as shown in table 2.
After the sewage plant is subjected to upgrading and transformation, COD, BOD and NH3-N, TN of the effluent of the biological section stably reach the first level A standard of pollutant discharge Standard (GB18918-2002) of urban sewage treatment plants. And the new land is not needed in the upgrading and reconstruction process, the civil engineering quantity is small, and the construction period is short. And the biological section is reformed without stopping production by reforming the CAST reaction tank one by one.
Parts not described in the above modes can be realized by adopting or referring to the prior art.
The above description is only for the purpose of describing the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.
TABLE 1
| Serial number | Item | Unit of | Parameter(s) | |
| 1 | Residence time in anaerobic zone | h | 0.91 | |
| 2 | Residence time in | h | 9 | |
| 3 | Aerobic MBBR zone residence time | h | 8.5 | |
| 4 | Residence time in aerobic zone | h | 5.5 | |
| 5 | Total suspended filler | m3 | 15000 | |
| 6 | Sludge concentration | mg/l | 3000～4000 | |
| 7 | Internal reflux ratio | 100％～400％ |
TABLE 2
| Period of time | Inlet (h) | Aeration while water inflow (h) | Aeration (h) | Precipitate (h) | Decanting water (h) | Total (h) |
| Time of day | 1.0 | 0.5 | 2.5 | 1.0 | 1.0 | 6.0 |
Claims (4)
1. A sewage treatment device for enhancing nitrogen and phosphorus removal is characterized by comprising an anaerobic zone, an anoxic zone, an aerobic MBBR zone and an aerobic reaction zone which are communicated in sequence; the anaerobic/anoxic zone and the aerobic MBBR zone are separated by a partition wall, and the aerobic MBBR zone and the aerobic reaction zone are separated by an interception screen; stirring devices are arranged in the anaerobic zone and the anoxic zone; suspended fillers are added into the aerobic MBBR area, and an aeration system is arranged at the bottom of the aerobic MBBR area; the aerobic reaction zone is provided with a reflux pump, a residual sludge pump and a decanting device, and the bottom of the aerobic reaction zone is provided with an aeration system; the aerobic reaction zone is connected with the anaerobic/anoxic zone through a return pipe, and the mixed liquid in the aerobic reaction zone is returned to the anaerobic/anoxic zone through a return pump.
2. The sewage treatment plant for enhanced nitrogen and phosphorus removal as claimed in claim 1, wherein the partition wall between the anoxic zone and the aerobic MBBR zone is made of stainless steel, and the partition wall has a uniform water distribution function.
3. The sewage treatment plant for enhanced nitrogen and phosphorus removal according to claim 1, wherein a stirring device is disposed in the aerobic MBBR zone.
4. The sewage treatment plant for enhanced nitrogen and phosphorus removal according to claim 1, wherein the reflux pump in the aerobic reaction zone is adjusted by frequency conversion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020514888.1U CN212292994U (en) | 2020-04-10 | 2020-04-10 | Sewage treatment device for enhancing nitrogen and phosphorus removal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020514888.1U CN212292994U (en) | 2020-04-10 | 2020-04-10 | Sewage treatment device for enhancing nitrogen and phosphorus removal |
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| CN212292994U true CN212292994U (en) | 2021-01-05 |
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| CN202020514888.1U Active CN212292994U (en) | 2020-04-10 | 2020-04-10 | Sewage treatment device for enhancing nitrogen and phosphorus removal |
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