CN215161945U - Advanced treatment and upgrading system for town sewage - Google Patents
Advanced treatment and upgrading system for town sewage Download PDFInfo
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- CN215161945U CN215161945U CN202120777918.2U CN202120777918U CN215161945U CN 215161945 U CN215161945 U CN 215161945U CN 202120777918 U CN202120777918 U CN 202120777918U CN 215161945 U CN215161945 U CN 215161945U
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- 238000011282 treatment Methods 0.000 title claims abstract description 67
- 239000010865 sewage Substances 0.000 title claims abstract description 55
- 238000004062 sedimentation Methods 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 230000015271 coagulation Effects 0.000 claims abstract description 22
- 238000005345 coagulation Methods 0.000 claims abstract description 22
- 239000010802 sludge Substances 0.000 claims description 47
- 230000003750 conditioning effect Effects 0.000 claims description 14
- 238000004659 sterilization and disinfection Methods 0.000 claims description 12
- 239000006004 Quartz sand Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 5
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 5
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 5
- 235000017281 sodium acetate Nutrition 0.000 claims description 5
- 239000001632 sodium acetate Substances 0.000 claims description 5
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000032770 biofilm formation Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 6
- 239000011574 phosphorus Substances 0.000 abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 239000010842 industrial wastewater Substances 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 4
- 238000005188 flotation Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 241000233866 Fungi Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000011866 long-term treatment Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model discloses an advanced treatment and label-extracting system for town sewage; comprises a sewage conveying unit, a biochemical treatment unit and an advanced treatment unit which are connected in sequence; the sewage conveying unit comprises a water collecting well, an adjusting tank and an air floating tank; the biochemical treatment unit is divided into two parallel paths, wherein one path comprises a biochemical tank, a secondary sedimentation tank A and an intermediate tank; the other path comprises a Bardenpho tank and a secondary sedimentation tank B; the deep treatment unit comprises a high-efficiency magnetic coagulation sedimentation tank and a denitrification deep bed filter which are connected in sequence. The utility model discloses a system is according to sewage quality and water yield, the environmental capacity and the utilization circumstances of receiving the water, consider that industrial waste water accounts for municipal sewage proportion, handles the degree of difficulty, quality of water characteristics and nitrogen and phosphorus removal effect etc. adopt advanced, the economic reasonable, the reliable and reliable system of technique, both ensure that the play water is discharge to reach standard, accomplish to reduce construction investment and running cost as far as possible again to consider flood control, reserve the long-term land for handling.
Description
Technical Field
The utility model relates to a municipal sewage administers technical field, concretely relates to advanced treatment who is used for town sewage carries mark system.
Background
Along with the development of the urbanization level, the population scale of cities and towns is continuously increased, the amount of domestic sewage generated by residents is continuously increased, the infrastructure of the cities falls behind, a large amount of untreated domestic sewage is directly discharged, potential threats are formed on the quality of surface water and underground water, adverse effects are caused to industrial and agricultural production and people's life in downstream areas, and the improvement of the quality of life of people is restricted. More seriously, the urban sewage is discharged into the sea without treatment, seriously pollutes the water quality of the sea area near cities and towns, destroys the ecological environment of the sea, seriously influences the sustainable development of marine industries such as marine fishery, seawater desalination and the like, and brings considerable harm to the health of sea island people accompanied by the sea. Therefore, the method increases the strength of infrastructure construction, improves the water environment quality, and has important significance for promoting the sustainable development of local economy and society and improving the life quality of people.
The COD value standard-reaching rate of the effluent quality in the existing sewage treatment process is more than 94 percent, and the effluent NH3Both N, TN and TP are difficult to stably meet the discharge requirements in the discharge Standard of Water pollutants for urban Sewage treatment plants (DB 33/2169-2018).
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an advanced treatment who is used for town sewage carries mark system on current sewage treatment system's basis, guarantees out water COD, TN, NH3-N, TP stable standard.
In order to achieve the purpose, the utility model provides an advanced treatment and label-lifting system for town sewage, which comprises a sewage conveying unit, a biochemical treatment unit and an advanced treatment unit which are connected in sequence;
the sewage conveying unit comprises a water collecting well, an adjusting tank 2 and an air floatation tank 3 which are connected in sequence;
the biochemical treatment unit is divided into two parallel paths, wherein one path comprises a biochemical tank 4, a secondary sedimentation tank A5 and an intermediate tank 6 which are connected in sequence; the other path comprises a Bardenpho tank 8 and a secondary sedimentation tank B9 which are connected in sequence;
the advanced treatment unit comprises a high-efficiency magnetic coagulation sedimentation tank 10 and a denitrification deep bed filter tank 11 which are connected in sequence; and the inlet of the high-efficiency magnetic coagulation sedimentation tank 10 is respectively connected with the intermediate tank 6 and the secondary sedimentation tank B9.
As an embodiment of the present invention, the system further comprises a sludge treatment unit; the sludge treatment unit comprises a sludge concentration tank 7 and a sludge conditioning tank 14; the sludge concentration tank 7 is connected with the sludge outlet of the secondary sedimentation tank A5, and the sludge conditioning tank 14 is respectively connected with the secondary sedimentation tank B9, the high-efficiency magnetic coagulation sedimentation tank 10 and the sludge concentration tank 7.
As an embodiment of the utility model, the sludge conditioning tank 14 is provided with a ferric trichloride dosing device 16 and a PAM dosing device 17.
As an embodiment of the present invention, the advanced treatment unit further comprises a water producing tank 12 and a disinfection tank 13; the effluent of the denitrification deep bed filter 11 is treated by a water producing tank 12 and a disinfection tank 13 and then can be discharged.
As an embodiment of the present invention, the disinfection tank 13 is provided with a sodium hypochlorite feeding device 15.
As an embodiment of the utility model, a sodium acetate feeding device 18 is arranged on the Bardenpho pool 8;
as an embodiment of the utility model, the sewage in the water collecting well is pumped to the adjusting tank 2 by the lift pump; and a mechanical grid is arranged in the water collecting well and lifted for pretreatment. The pretreatment is carried out by mechanical grid lifting. Removing the matters such as large-volume sundries, suspended matters, oil and the like in the sewage.
The utility model discloses a sewage conveying unit utilizes air supporting pond 3 to carry out the preliminary treatment deoiling, selects for use the air flotation process treatment time short, and air supporting equipment area is little, simple structure, and exhaust dross moisture content is lower, and mud is small.
As an embodiment of the utility model, the Bardenpho tank 8 comprises an anaerobic tank-an anoxic tank-an aerobic tank and a sedimentation tank which are connected in sequence; part of effluent of the aerobic tank flows back to a pipeline at the front end of inlet water of the anoxic tank through a mixed liquid return pipeline; and sludge at the outlet of the sedimentation tank flows back to a water inlet pipeline at the front end of the anaerobic tank through a sludge return pipeline, and the effluent of the sedimentation tank enters a secondary sedimentation tank B. As an efficient improvement A2In the/O pool, the SVI value is not more than 100 generally, the settleability of the sludge is good, and the functions of removing organic matters, nitrifying and denitrifying, excessively absorbing and removing phosphorus and the like can be simultaneously completed.
As an embodiment of the utility model, a high-efficiency magnetic coagulation and denitrification deep bed filter tank is adopted as a main body deep treatment system, the high-efficiency magnetic coagulation sedimentation tank has good dephosphorization effect, and the flocculation effect is strengthened by adding magnetic powder and the sedimentation of a flocculating constituent is accelerated; and the combination with a denitrification deep bed filter tank can ensure lower SS, enhance the dephosphorization effect and operate stably.
As an embodiment of the utility model, the denitrification deep-bed filter 11 adopts quartz sand with special specification and shape as the biofilm formation medium of denitrification organisms. The particle size of the quartz sand medium filter material is 2-3mm, the filter can ensure that the SS of the outlet water is lower than 5mg/L, and the unique homogeneous quartz sand allows solid impurities to penetrate through the surface layer of the filter bed and go deep into the filter material of the filter, thereby achieving the excellent effect of throttling solids in the depth of the whole filter. The back flushing water quantity is less, and the traditional pollution blockage problem is solved by the unique filter brick technology.
The system of the utility model ensures the river water body planning function and improves the environmental benefit by considering the proportion of the industrial wastewater in the urban sewage, the treatment difficulty, the water quality characteristics, the denitrification and dephosphorization effects and the like according to the quality and the quantity of the sewage, the environmental capacity and the utilization condition of the receiving water body; through the comparison of technology and economy, a stable and reliable process system with advanced technology, economy and reasonability is adopted, so that the effluent is ensured to be discharged up to the standard, and the construction investment and the operation cost are reduced as much as possible; the general plane arrangement strives for smooth flow, reasonable and compact, reduces the occupied area, balances the earthwork, and considers flood control and reserves long-term treatment land.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. in the system of the utility model, the treatment effect of the high-efficiency magnetic coagulation sedimentation tank is good, and the single high-efficiency phosphorus and suspended solids removal is more than 85%; the purification time is short, and the operation efficiency is high; the impact load resistance is strong, and the stable operation can be still realized under the conditions of large water amount and high pollution load; the operation cost is low, and the magnetic seed recycling efficiency is high.
2. The utility model discloses an among the system, Bardenpho pond arranges anaerobism pond, oxygen deficiency pond, good oxygen pond, sedimentation tank in proper order, and the organic cooperation of three kinds of different environmental conditions and different kinds of microbial flora reaches the function of getting rid of organic matter, nitrogen and phosphorus removal simultaneously. The precondition for denitrification is NH3N is completely nitrified, the aerobic tank can complete the function, the anoxic tank can complete the denitrification function, and the anaerobic tank and the aerobic tank jointly complete the dephosphorization function. The treated sludge has high phosphorus concentration and is beneficial to biological phosphorus removal.
3. In the system of the utility model, the Bardenpho pool process flow is simpler, and the total hydraulic retention time is less than other processes of the same kind. Under the condition of anaerobic-anoxic-aerobic alternate operation, filamentous fungi cannot be propagated in large quantity, the SVI value is generally less than 100, the sludge settleability is good, and the sludge bulking cannot occur.
4. The utility model discloses a system treatment is effectual, goes out water quality of water and satisfies emission standard, and investment, occupation of land, running cost etc. are more economical, are applicable to small-size sewage treatment plant and carry the mark to reform transform.
5. The utility model discloses an in the system, sewage divides two tunnel to flow into biochemical pond and Bardenpho pond respectively and handles, improves sewage treatment efficiency on the one hand, enlarges the engineering treatment scale, reduces area, and gets rid of effectually. The overall design idea of the town sewage treatment system is 'pretreatment + biochemical treatment + advanced treatment + disinfection', and most of substances exceeding the standard, such as COD, TN and NH, are treated by a first-stage biochemical tank, a secondary sedimentation tank and an intermediate tank3Indexes such as-N, SS and TP are reduced in the stage, and the effluent is treated by a Bardenphos-secondary sedimentation tank, so that the water quality is good and the standard discharge can be achieved. On the other hand, the denitrification and dephosphorization by utilizing the Bardenphos process needs mixed liquid backflow and sludge backflow, has more pipelines and large investment and construction amount, can reduce the investment and operation cost by combining with the traditional biochemical tank, and is an economic choice for urban sewage plants.
Drawings
FIG. 1 is a schematic structural view of the advanced treatment system for municipal sewage treatment of the present invention;
FIG. 2 is a process flow diagram of a Bardenpho cell;
wherein, 1-a water collecting well/a lifting pump room, 2-a regulating tank, 3-an air flotation tank, 4-a biochemical tank, 5-a secondary sedimentation tank A, 6-an intermediate tank, 7-a sludge concentration tank, 8-a Bardenpho tank, 9-a secondary sedimentation tank B, 10-a high-efficiency magnetic coagulation sedimentation tank, 11-a denitrification deep bed filter tank, 12-a water producing tank, 13-a disinfection tank, 14-a sludge conditioning tank, 15-a sodium hypochlorite dosing device, 16-an iron trichloride dosing device, 17-a PAM dosing device, 18-a sodium acetate dosing device, and W-is a sewage pipeline; n-is a sludge pipeline; y-is a feed conduit.
Detailed Description
The present invention will be described in detail with reference to examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that numerous modifications and improvements can be made by those skilled in the art without departing from the inventive concepts herein. These all belong to the protection scope of the present invention.
Example 1
The example relates to a deep treatment and upgrading system for urban sewage as shown in figure 1, which comprises a water collecting well/lift pump room 1, an adjusting tank 2, an air flotation tank 3, a biochemical tank 4, a secondary sedimentation tank A5, a middle tank 6, a sludge concentration tank 7, a Bardenpho tank 8, a secondary sedimentation tank B9, a high-efficiency magnetic coagulation sedimentation tank 10, a denitrification deep bed filter tank 11, a water production tank 12, a disinfection tank 13, a sludge conditioning tank 14, a sodium hypochlorite dosing device 15, an iron trichloride dosing device 16, a PAM dosing device 17 and a sodium acetate dosing device 18.
The advanced treatment and upgrading system comprises a sewage conveying unit, a biochemical treatment unit, an advanced treatment unit and a sludge treatment unit.
The sewage conveying unit comprises a water collecting well/lifting pump room 1, a regulating tank 2 and an air floatation tank 3. According to the sewage conveying direction, a water collecting well/lifting pump room 1, an adjusting tank 2 and an air floatation tank 3 are connected in sequence, sewage flows out of the air floatation tank 3, and biochemical treatment is carried out in two routes.
The biochemical treatment unit is divided into two paths, wherein one path comprises a biochemical tank 4, a secondary sedimentation tank A5 and an intermediate tank 6; the other path comprises a Bardenpho tank 8 and a secondary sedimentation tank B9.
According to the sewage treatment direction, a part of sewage flows out of the air floatation tank 3, is sequentially connected with the biochemical tank 4, the secondary sedimentation tank A5 and the intermediate tank 6, and enters the high-efficiency magnetic coagulation sedimentation tank 10; the other part of the sewage flows out of the air flotation tank 3 and enters the high-efficiency magnetic coagulation sedimentation tank 10 through the Bardenphos tank 8 and the secondary sedimentation tank B9.
The advanced treatment unit comprises a high-efficiency magnetic coagulation sedimentation tank 10, a denitrification deep bed filter tank 11, a water production tank 12 and a disinfection tank 13; wherein, the high-efficiency magnetic coagulation and denitrification deep bed filter is a main body deep treatment unit. The high-efficiency magnetic coagulation sedimentation tank 10 and the denitrification deep bed filter tank 11 are connected in sequence; after advanced treatment, the wastewater can be discharged after being treated by a water producing tank 12 and a sterilizing tank 13.
The sludge treatment unit comprises a sludge concentration tank 7 and a sludge conditioning tank 14. The sludge concentration tank 7 is connected with a sludge outlet of the secondary sedimentation tank A5; the sludge conditioning tank 14 is respectively connected with the secondary sedimentation tank B9, the high-efficiency magnetic coagulation sedimentation tank 10 and the sludge concentration tank 7.
In the system of the embodiment, a sodium acetate feeding device 18 is arranged on the Bardenpho pool 8; the disinfection tank 13 is provided with a sodium hypochlorite feeding device 15; the sludge conditioning tank 14 is provided with an iron trichloride dosing device 16 and a PAM dosing device 17.
As a preferred solution, the sump well/lift pump house 1 is pre-treated with mechanical grid lifting. The device is used for better removing substances such as large-volume sundries, suspended matters, oils and the like in the sewage.
The Bardenpho tank 8 alternately uses an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank. The technological process is shown in figure 2, and the Bardenpho tank 8 comprises an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank which are connected in sequence; part of effluent of the aerobic tank flows back to a pipeline at the front water inlet end of the anoxic tank through a mixed liquid return pipeline; and sludge at the outlet of the sedimentation tank flows back to a water inlet pipeline at the front end of the anaerobic tank through a sludge return pipeline, and the effluent of the sedimentation tank enters a secondary sedimentation tank B9.
As a preferred scheme, the denitrification deep bed filter 11 adopts quartz sand with special specification and shape as a biofilm formation medium of denitrification organisms, the quantity of backwash water is small, and the traditional pollution blockage problem is solved by a unique filter brick technology.
The process flow of the system of the embodiment is as follows: after large-volume impurities in the wastewater are removed by a water collecting well/lifting pump room 1, the wastewater is lifted to an adjusting tank 2 for water quality and water quantity adjustment, the effluent of the adjusting tank 2 is conveyed to an air floatation tank 3, and after most of oil substances are removed in the air floatation tank 3, the effluent is divided into two paths and is respectively subjected to biochemical treatment.
One end of the high-efficiency magnetic coagulation sedimentation tank is connected with the biochemical tank 4, the secondary sedimentation tank A5 and the intermediate tank 6 in sequence, and the high-efficiency magnetic coagulation sedimentation tank 10 and the denitrification deep bed filter tank 11 enter the advanced treatment unit after treatment; the other part is connected with a Bardenpho tank 8 and a secondary sedimentation tank B9, and the effluent automatically flows into a high-efficiency magnetic coagulation sedimentation tank 10 and a denitrification deep bed filter tank 11.
After the sewage is biochemically treated by two routes, TP and TN both reach the wastewater discharge standard, and the sewage can be discharged after being treated by the water production tank 12 and the disinfection tank 13.
The sludge conditioning tank 14 is respectively connected with the secondary sedimentation tank B9, the high-efficiency magnetic coagulation sedimentation tank 10 and the sludge concentration tank 7, the precipitated muddy water generated in the wastewater treatment process is conveyed to the sludge conditioning tank 14 for precipitation and dehydration, and the dehydrated sludge is transported to a designated unit for disposal.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. The advanced treatment and upgrading system for the town sewage is characterized by comprising a sewage conveying unit, a biochemical treatment unit and an advanced treatment unit which are sequentially connected;
the sewage conveying unit comprises a water collecting well, an adjusting tank (2) and an air floatation tank (3) which are connected in sequence;
the biochemical treatment unit is divided into two parallel paths, wherein one path comprises a biochemical tank (4), a secondary sedimentation tank A (5) and an intermediate tank (6) which are connected in sequence; the other path comprises a Bardenpho tank (8) and a secondary sedimentation tank B (9) which are connected in sequence;
the deep treatment unit comprises a high-efficiency magnetic coagulation sedimentation tank (10) and a denitrification deep bed filter (11) which are connected in sequence; and the inlet of the high-efficiency magnetic coagulation sedimentation tank (10) is respectively connected with the intermediate tank (6) and the secondary sedimentation tank B (9).
2. The advanced treatment upgrading system for urban sewage according to claim 1, characterized in that the system further comprises a sludge treatment unit; the sludge treatment unit comprises a sludge concentration tank (7) and a sludge conditioning tank (14); the sludge concentration tank (7) is connected with the sludge outlet of the secondary sedimentation tank A (5), and the sludge conditioning tank (14) is respectively connected with the secondary sedimentation tank B (9), the high-efficiency magnetic coagulation sedimentation tank (10) and the sludge concentration tank (7).
3. The advanced treatment and upgrading system for urban sewage according to claim 2, characterized in that the sludge conditioning tank (14) is provided with a ferric trichloride dosing device (16) and a PAM dosing device (17).
4. The advanced treatment upgrading system for urban sewage according to claim 1, characterized in that the advanced treatment unit further comprises a water production tank (12), a disinfection tank (13); the effluent of the denitrification deep bed filter (11) is treated by a water producing tank (12) and a disinfection tank (13) and then discharged.
5. The advanced treatment and upgrading system for urban sewage according to claim 4, characterized in that the disinfection tank (13) is provided with a sodium hypochlorite feeding device (15).
6. The advanced treatment and upgrading system for urban sewage according to claim 1, characterized in that a sodium acetate feeding device (18) is arranged on the Bardenpho tank (8).
7. Advanced treatment upgrading system for town sewage according to claim 1, characterized in that the sewage in the catchment well is pumped to the conditioning tank (2) by a lift pump; and a mechanical grid is arranged in the water collecting well and lifted for pretreatment.
8. The advanced treatment and upgrading system for urban sewage according to claim 1, characterized in that the Bardenpho tank (8) comprises an anaerobic tank-anoxic tank-aerobic tank and a sedimentation tank which are connected in sequence; part of effluent of the aerobic tank flows back to a pipeline at the front end of inlet water of the anoxic tank through a mixed liquid return pipeline; and sludge at the outlet of the sedimentation tank flows back to a water inlet pipeline at the front end of the anaerobic tank through a sludge return pipeline, and the effluent of the sedimentation tank enters a secondary sedimentation tank B (9).
9. The advanced treatment and upgrading system for urban sewage according to claim 1, wherein the denitrification deep-bed filter (11) adopts quartz sand as a biofilm formation medium for denitrification organisms.
10. The advanced treatment and upgrading system for urban sewage according to claim 9, characterized in that the particle size of the quartz sand is 2-3 mm.
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| CN117720223A (en) * | 2023-12-12 | 2024-03-19 | 温州市排水有限公司 | Sewage treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117720223A (en) * | 2023-12-12 | 2024-03-19 | 温州市排水有限公司 | Sewage treatment system |
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