CN213623764U - Municipal administration sewage degree of depth nitrogen and phosphorus removal processing apparatus - Google Patents
Municipal administration sewage degree of depth nitrogen and phosphorus removal processing apparatus Download PDFInfo
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- CN213623764U CN213623764U CN202022597370.1U CN202022597370U CN213623764U CN 213623764 U CN213623764 U CN 213623764U CN 202022597370 U CN202022597370 U CN 202022597370U CN 213623764 U CN213623764 U CN 213623764U
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Abstract
The utility model relates to a municipal administration sewage degree of depth nitrogen and phosphorus removal processing apparatus belongs to municipal administration sewage treatment technical field. The treatment device comprises a regulating reservoir, an anaerobic tank, an anoxic tank, an aerobic tank, a composite phosphorus removing agent dosing tank, a secondary sedimentation tank and a sludge concentration tank which are sequentially connected through a transmission pipeline, wherein low-speed plug flow stirrers are arranged in the regulating reservoir and the anaerobic tank, mechanical stirring is arranged in the anoxic tank and the composite phosphorus removing agent dosing tank, spherical fillers containing solid slow-release carbon sources are arranged in the anoxic tank, an aeration device is arranged at the bottom of the aerobic tank, the anoxic tank and the aerobic tank perform internal reflux through a mixed liquid reflux pipe and a sludge pump, the bottom of the secondary sedimentation tank performs external reflux through a sludge reflux pipe and a sludge reflux pump, and the anaerobic tank is connected with the secondary sedimentation tank and is provided with a water outlet and a sludge discharge port. The utility model discloses utilize the synergism of slowly-releasing solid carbon source and compound dephosphorization agent, through controlling inside and outside reflux ratio, realized municipal administration sewage degree of depth nitrogen and phosphorus removal effect.
Description
Technical Field
The utility model belongs to the technical field of municipal sewage treatment, in particular to municipal sewage degree of depth nitrogen and phosphorus removal processing apparatus.
Background
Nitrogen and phosphorus are necessary nutrient elements for the growth of aquatic plants, can promote the normal growth of the aquatic plants and maintain the ecological balance of a water body, but excessive nitrogen and phosphorus easily cause eutrophication of the water body and water quality deterioration; the amount of urban sewage increases year by year, and 80% of rivers and lakes are polluted to different degrees. The urban sewage treatment plant is the most main carrier for achieving the water pollutant emission reduction target. In order to further control the discharge of pollutants, the primary standard of urban sewage is further refined into A, B two stages, and sewage treatment plants in key basin and regional areas need to reach the primary A (total nitrogen is less than or equal to 15mg/L, and total phosphorus is less than or equal to 0.5mg/L) or higher discharge standard (total phosphorus is less than or equal to 0.2 mg/L). The increasingly strict discharge standard puts forward higher technical requirements on the nitrogen and phosphorus removal of sewage treatment plants.
At present, the town sewage treatment plant mainly adopts an inversion A2The process has good removal effect on COD and ammonia nitrogen, but has poor stability and poor effect on removing total nitrogen and total phosphorus, and is difficult to achieve the process characteristics of GB18918-2002 pollutant emission standard IA emission standard. According to investigation, a general sewage treatment plant A2The mass concentration of total phosphorus and total nitrogen in effluent after the treatment by the/O biological method is between 1 and 2mg/L and 15 to 20mg/L, and the effluent cannot meet the emission standard easily, so that the series connection of coupling processes and indexes such as TN (total nitrogen) and TP (total phosphorus) synergistic treatment become more and more important.
The chemical coagulating sedimentation has the advantages of low cost, simple operation, good stability and the like, and can be used for advanced treatment of urban sewage plants to further remove phosphorus. From the operating experience of the various large wastewater treatment plants, it was shown that the wastewater treatment plant A2The advanced treatment of the water quality total phosphorus by the O biological method and flocculationThe necessary means for reaching the total nitrogen standard. In the current stage, a chemical deep purification means is added after biochemical treatment in the sewage treatment plant.
Therefore, a municipal sewage advanced nitrogen and phosphorus removal treatment device needs to be researched and developed, so that an efficient and thorough domestic sewage treatment technology is realized, the treated domestic sewage meets the national discharge standard, and the domestic sewage is favorably recycled.
Disclosure of Invention
For solving the problem that exists among the prior art, the utility model discloses a municipal wastewater degree of depth nitrogen and phosphorus removal processing apparatus has been designed, and the simple practicality of process, easily control can realize municipal wastewater's degree of depth nitrogen and phosphorus removal.
The utility model discloses the technical solution who adopts is: municipal administration sewage degree of depth nitrogen and phosphorus removal processing apparatus includes equalizing basin, anaerobism pond, oxygen deficiency pond, good oxygen pond and the two ponds that connect gradually through the transmission line, be equipped with first low-speed plug flow agitator in the equalizing basin, be equipped with the second low-speed plug flow agitator in the anaerobism pond, the oxygen deficiency pond is equipped with first mechanical stirring, good oxygen bottom of the pool portion is equipped with aeration equipment, the bottom in anaerobism pond, oxygen deficiency pond, good oxygen pond and the two ponds that sink is hourglass hopper-shaped, is equipped with row mud mouth respectively.
Furthermore, the spherical filler is filled in the anoxic tank, the filling volume of the spherical filler accounts for 30-40% of the effective volume of the anoxic tank, and the spherical filler is filled with a solid slow-release carbon source. The water circulation in the reactor is promoted by mechanical stirring, so that the activated sludge is fully contacted with the solid slow-release carbon source, and the effects of nitrogen and phosphorus removal are achieved.
Furthermore, a three-way pipe is arranged on a transmission pipeline between the aerobic tank and the secondary sedimentation tank, the transmission pipeline is connected with a mixed liquid return pipe, the other end of the mixed liquid return pipe is connected with the water inlet end of the anoxic tank, and a mixed liquid return pump and a first flow control valve are arranged on the mixed liquid return pipe. And the sewage enters the anoxic tank and the aerobic tank again through the mixed liquid return pipeline to carry out secondary nitrogen and phosphorus removal.
Furthermore, the treatment device also comprises a sludge concentration tank, sludge discharge ports of the anaerobic tank, the anoxic tank, the aerobic tank and the secondary sedimentation tank are respectively connected with a sludge discharge pipe, each sludge discharge pipe is respectively connected with a sludge pump and a switch valve, and each sludge discharge pipe is connected with the sludge concentration tank through a sludge discharge main pipe. The sludge concentration tank is used for concentrating, conditioning, filter-pressing and disposing the sludge.
Furthermore, a three-way pipe is arranged on the rear side of the sludge discharge main pipe at the sludge discharge pipe connection position of the secondary sedimentation tank and is connected with a sludge return pipe, the other end of the sludge return pipe is connected with the water inlet end of the anaerobic tank, and a sludge return pump and a second flow control valve are arranged on the sludge return pipe. The sludge return pipe conveys the precipitated sludge into the anaerobic tank again for denitrification and dephosphorization again.
Further, the treatment device comprises a phosphorus removal agent dosing tank, a second mechanical stirrer is arranged in the phosphorus removal agent dosing tank, the bottom of the phosphorus removal agent dosing tank is provided with a switch valve, the phosphorus removal agent dosing tank is connected with a water inlet end of the secondary sedimentation tank through a dosing pipeline, a metering dosing pump is arranged on the dosing pipeline, and a joint of the dosing pipeline and the water inlet end of the secondary sedimentation tank is positioned behind a joint of the mixing backflow pipe.
Furthermore, a pipeline mixer is arranged at the joint of the dosing pipeline and the water inlet end of the secondary sedimentation tank.
Compared with the prior art, the utility model discloses a municipal wastewater advanced nitrogen and phosphorus removal processing apparatus's of patent design progress part lies in, utilizes the denitrification of solid slowly-releasing carbon source and the degree of depth dephosphorization effect of dephosphorization agent to combine together to play the effect of nitrogen and phosphorus removal. The set denitrification technology of the solid slow-release carbon source can slowly release the organic carbon, meets the requirements of the life activities of microorganisms, can reduce the risk of secondary pollution caused by excessive addition of the organic carbon, can provide attachment points for the microorganisms, and is favorable for the appreciation of the microorganisms. Although the solid-phase denitrification process solves the problem of insufficient carbon source, the removal of phosphorus cannot be well realized, so that the effect of nitrogen and phosphorus removal is realized by adding the composite phosphorus removal agent dosing tank at the connecting pipeline of the aerobic tank and the secondary sedimentation tank and realizing the synergistic effect of denitrification reaction of the solid slow-release carbon source and deep phosphorus removal of the composite phosphorus removal agent. Besides, a mixed liquid return pipeline and a sludge return pipeline are arranged, so that the treated sewage and sludge are returned to the treatment device again for treatment, and the effects of nitrogen and phosphorus removal are improved.
Drawings
FIG. 1 is a schematic view of the apparatus for advanced denitrification and dephosphorization treatment of municipal sewage
Description of the reference numerals
1 regulating tank, 2 anaerobic tank, 3 anoxic tank, 4 aerobic tank, 5 secondary sedimentation tank, 6 phosphorus removing agent dosing tank, 7 sludge concentration tank, 8 mixed liquid return pipe, 9 sludge return pipe, 10 sludge discharge header pipe, 11 first low-speed plug flow stirrer, 21 second low-speed plug flow stirrer, 31 first mechanical stirring, 32 spherical filler, 41 aeration device, 43 pipeline mixer, 61 second mechanical stirring, 62 metering dosing pump, 81 first flow control valve, 82 mixed liquid reflux pump, 91 second flow control valve, 92 sludge reflux pump
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention are clearly and completely described, and the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention
As shown in figure 1, the utility model discloses a municipal administration sewage degree of depth nitrogen and phosphorus removal processing apparatus's embodiment has been designed, in this embodiment, municipal administration sewage degree of depth nitrogen and phosphorus removal processing apparatus includes equalizing basin 1, anaerobism pond 2, oxygen deficiency pond 3, good oxygen pond 4 and two heavy ponds 5 that connect gradually through transmission line, and the business turn over water end in each pond all sets up on upper portion to all be provided with the ooff valve at respective water end that goes out.
A first low-speed plug flow stirrer 11 is arranged in the regulating tank 1, a second low-speed plug flow stirrer 21 is arranged in the anaerobic tank 2, a first mechanical stirrer 31 is arranged in the anoxic tank 3, and an aeration device 41 is arranged at the bottom of the aerobic tank 4. The bottom parts of the anaerobic tank 2, the anoxic tank 3, the aerobic tank 4 and the secondary sedimentation tank 5 are funnel-shaped and are provided with sludge discharge ports. Municipal sewage enters the regulating tank 1, is stirred and mixed uniformly by the first low-speed plug flow stirrer 11, then flows through the anaerobic tank 2, the anoxic tank 3, the aerobic tank 4 and the secondary sedimentation tank 5 in sequence, is purified and is discharged through an overflow port at the upper end of the secondary sedimentation tank 5 after reaching the standard.
The spherical filler 32 is filled in the anoxic tank 3, the whole filling volume of the spherical filler 32 accounts for 40 percent of the effective volume of the anoxic tank 3, and the spherical filler 32 is filled with copolymer particles (PHBV particles) of solid slow-release carbon source 3-hydroxybutyrate and 3-hydroxyvalerate.
The transmission pipeline between the aerobic tank 4 and the secondary sedimentation tank 5 is provided with a three-way pipe and is connected with a mixed liquid return pipe 8, and the other end of the mixed liquid return pipe 8 is connected with the water inlet end of the anoxic tank 3 to carry out mixed liquid return. The mixed liquid reflux pipe 8 is provided with a first flow control valve 81 and a mixed liquid reflux pump 82, and the reflux ratio of the mixed liquid is controlled to be more than or equal to 200% by the first flow control valve 81.
The tail end of the treatment device is provided with a sludge concentration tank 7. The sludge discharging ports of the anaerobic tank 2, the anoxic tank 3, the aerobic tank 4 and the secondary sedimentation tank 5 are respectively connected with sludge discharging pipes, the respective sludge discharging pipes are respectively connected with a sludge pump and a switch valve, and the sludge discharging pipes are connected with a sludge concentration tank 7 through a sludge discharging main pipe 10. The sludge concentration tank 7 is used for concentrating, conditioning, filter-pressing and disposing the treated sludge.
The rear side of the sludge discharge main pipe 10 at the connection part of the sludge discharge pipe and the secondary sedimentation tank 5 is provided with a three-way pipe and is connected with a sludge return pipe 9, and the other end of the sludge return pipe 9 is connected with the water inlet end of the anaerobic tank 2. The sludge return pipe 9 is provided with a sludge return pump 92 and a second flow control valve 91. The sludge reflux pipe 9 conveys the precipitated sludge into the anaerobic tank 2 again for denitrification and dephosphorization again, and the second flow control valve 91 controls the sludge reflux ratio to be 80 percent.
The treatment device is also provided with a phosphorus removing agent dosing tank 6, a second mechanical stirring device 61 is arranged in the phosphorus removing agent dosing tank 6, the bottom of the tank is opened and is provided with a switch valve, a transmission pipeline between the aerobic tank 4 and the secondary sedimentation tank 5 is connected through a dosing pipeline, the joint of the dosing pipeline and the transmission pipeline is positioned behind the joint of the mixed liquid return pipe 8, and a pipeline mixer 43 is arranged at the joint. The dosing pipeline is provided with a metering dosing pump 62. The composite phosphorus removing agent is added into a water outlet pipeline of the aerobic tank 4 through a metering dosing pump 62, the mixture is uniformly mixed with the water discharged from the aerobic tank 4 through a pipeline mixer 43 and then enters a secondary sedimentation tank 5 for sedimentation, the water reaching the standard is discharged through an overflow port of the secondary sedimentation tank 5, part of sludge at the bottom of the secondary sedimentation tank 5 enters an anaerobic tank 2 through a sludge return pipe 9 and a sludge return pump 10 for external reflux to improve the denitrification efficiency, meanwhile, the residual composite phosphorus removing agent in the sludge further participates in denitrification and phosphorus removal, and the residual sludge at the bottom of the secondary sedimentation tank 5 is discharged to a sludge concentration tank 7 through a sludge pump for concentration, conditioning, filter pressing and disposal.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims and the description of the invention.
Claims (7)
1. The utility model provides a municipal administration sewage degree of depth nitrogen and phosphorus removal processing apparatus, a serial communication port, processing apparatus includes equalizing basin, anaerobism pond, oxygen deficiency pond, good oxygen pond and two heavy ponds that connect gradually through transmission line, be equipped with first low-speed plug flow agitator in the equalizing basin, be equipped with second low-speed plug flow agitator in the anaerobism pond, the oxygen deficiency pond is equipped with first mechanical stirring, good oxygen bottom of the pool portion is equipped with aeration equipment, the bottom in anaerobism pond, oxygen deficiency pond, good oxygen pond and two heavy ponds is hourglass hopper-shaped, is equipped with row mud mouth respectively.
2. The municipal sewage advanced nitrogen and phosphorus removal treatment device according to claim 1, wherein the anoxic tank is filled with spherical filler, the filling volume of the spherical filler accounts for 30-40% of the effective volume of the anoxic tank, and the spherical filler is filled with a solid slow-release carbon source.
3. The municipal sewage deep nitrogen and phosphorus removal treatment device according to claim 2, wherein a three-way pipe is arranged on the transmission pipeline between the aerobic tank and the secondary sedimentation tank, the transmission pipeline is connected with a mixed liquid return pipe, the other end of the mixed liquid return pipe is connected with the water inlet end of the anoxic tank, and a mixed liquid return pump and a first flow control valve are arranged on the mixed liquid return pipe.
4. The municipal sewage advanced nitrogen and phosphorus removal treatment device according to claim 3, further comprising a sludge concentration tank, wherein sludge discharge ports of the anaerobic tank, the anoxic tank, the aerobic tank and the secondary sedimentation tank are respectively connected with a sludge discharge pipe, each sludge discharge pipe is respectively connected with a sludge pump and a switch valve, and each sludge discharge pipe is connected with the sludge concentration tank through a sludge discharge main pipe.
5. The municipal sewage deep nitrogen and phosphorus removal treatment device according to claim 4, wherein the sludge discharge main pipe is provided with a three-way pipe at the rear side of the connection with the sludge discharge pipe of the secondary sedimentation tank and is connected with a sludge return pipe, the other end of the sludge return pipe is connected with the water inlet end of the anaerobic tank, and the sludge return pipe is provided with a sludge return pump and a second flow control valve.
6. The municipal sewage deep nitrogen and phosphorus removal treatment device according to claim 5, wherein the treatment device comprises a phosphorus removal agent dosing tank, a second mechanical stirrer is arranged in the phosphorus removal agent dosing tank, the bottom of the phosphorus removal agent dosing tank is open and provided with a switch valve, the phosphorus removal agent dosing tank is connected with the water inlet end of the secondary sedimentation tank through a dosing pipeline, a metering dosing pump is arranged on the dosing pipeline, and the joint of the dosing pipeline and the water inlet end of the secondary sedimentation tank is positioned behind the joint of the mixing reflux pipe.
7. The municipal sewage deep nitrogen and phosphorus removal treatment device according to claim 6, wherein a pipeline mixer is arranged at the connection of the dosing pipeline and the water inlet end of the secondary sedimentation tank.
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| CN202022597370.1U CN213623764U (en) | 2020-11-11 | 2020-11-11 | Municipal administration sewage degree of depth nitrogen and phosphorus removal processing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112851024A (en) * | 2021-01-06 | 2021-05-28 | 安庆市绿巨人环境技术股份有限公司 | Sewage advanced nitrogen and phosphorus removal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112851024A (en) * | 2021-01-06 | 2021-05-28 | 安庆市绿巨人环境技术股份有限公司 | Sewage advanced nitrogen and phosphorus removal device |
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