CN116177741A - Two-stage AOA precipitation sewage biochemical treatment device and process method - Google Patents
Two-stage AOA precipitation sewage biochemical treatment device and process method Download PDFInfo
- Publication number
- CN116177741A CN116177741A CN202310246452.7A CN202310246452A CN116177741A CN 116177741 A CN116177741 A CN 116177741A CN 202310246452 A CN202310246452 A CN 202310246452A CN 116177741 A CN116177741 A CN 116177741A
- Authority
- CN
- China
- Prior art keywords
- tank
- sedimentation
- sludge
- stage
- anoxic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 61
- 238000001556 precipitation Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004062 sedimentation Methods 0.000 claims abstract description 157
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 122
- 239000010802 sludge Substances 0.000 claims abstract description 110
- 230000007246 mechanism Effects 0.000 claims abstract description 90
- 238000010992 reflux Methods 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 39
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 25
- 239000011574 phosphorus Substances 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 239000006228 supernatant Substances 0.000 claims description 47
- 238000003756 stirring Methods 0.000 claims description 13
- 238000011010 flushing procedure Methods 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 239000000969 carrier Substances 0.000 claims description 8
- 238000006396 nitration reaction Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000005192 partition Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a two-stage AOA sedimentation sewage biochemical treatment device and a process method, and relates to the technical field of sewage biochemical treatment, wherein the device comprises a phosphorus release nitrification combined tank, an anoxic tank and a secondary sedimentation tank which are sequentially arranged according to the water flow direction; the phosphorus release and nitrification combined tank, the anoxic tank and the secondary sedimentation tank are sequentially communicated; a first-stage sedimentation mechanism is arranged in the anoxic tank; the first-stage precipitation mechanism is communicated with the water body in the anoxic tank; the primary sedimentation mechanism is used for primarily separating mud from water of the mixed liquor in the anoxic tank; a reflux sludge pipe and a secondary sedimentation water outlet pipe are arranged on the secondary sedimentation tank, and the reflux sludge pipe is communicated with the phosphorus release nitrification combined tank; the primary sedimentation mechanism carries out primary mud-water separation on part of mixed liquid in the anoxic tank, the separated sludge is left in the anoxic tank, the amount of sludge flowing into the secondary sedimentation tank is reduced, and the amount of returned sludge in the secondary sedimentation tank is reduced; solves the problem of high sludge reflux quantity and high solid load of the secondary sedimentation tank in the prior treatment process.
Description
Technical Field
The invention relates to the technical field of sewage biochemical treatment devices and process methods, in particular to a two-stage AOA precipitation sewage biochemical treatment device and process method.
Background
The existing sewage biochemical treatment technology AOA process technology biochemical tank comprises an anaerobic section, an aerobic section and an anoxic section. Raw water and partial reflux sludge enter an anaerobic section, and the anaerobic section realizes phosphorus release and simultaneously utilizes microorganisms in a pool to adsorb organic matters; the effluent of the anaerobic section enters an aerobic section, and the aerobic section realizes the degradation of dissolved COD in sewage and completes the nitration reaction at the same time; and the effluent from the aerobic section and part of the returned sludge enter an anoxic section, and the anoxic section uses organic matters adsorbed in the sludge and a carbon source in the returned sludge to perform denitrification so as to realize denitrification.
The reflux sludge of the existing AOA treatment process is divided into 2 parts; part of the sludge flows back to the anaerobic tank to ensure the sludge concentration of the anaerobic tank and the aerobic tank; and the other part of the sludge flows back to the anoxic tank to further degrade the carbon source in the sludge. The two parts of the sludge reflux design flow are respectively 1 time of the design inflow flow, and the reflux sludge is 1 time greater than the conventional A2/O process, so that the solid load of the sludge in the secondary sedimentation tank is higher, the control parameters are influenced by the solid load parameters, and the secondary sedimentation tank area and the tank capacity required by the AOA process are both increased, so that the investment is higher; the secondary sedimentation tank of the AOA process is larger than that of the conventional A2/O process, the reflux sludge of the anaerobic section and the anoxic section of the AOA technology are from the secondary sedimentation tank, the total reflux sludge amount is 2 times of the water inflow, the sludge reflux energy consumption is high, and the method is a bottleneck of the conventional AOA process.
In summary, the applicant has found that at least the following technical problems exist in the prior art:
the existing AOA treatment process has the problem that the sludge reflux quantity is high, so that the solid load of the secondary sedimentation tank sludge is high.
Disclosure of Invention
The invention aims to provide a two-stage sedimentation sewage biochemical treatment device and a process method, which are used for solving the problem that the existing AOA treatment process has high sludge reflux and causes higher solid load of sludge in a secondary sedimentation tank.
The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a two-stage AOA sedimentation sewage biochemical treatment device, which comprises a phosphorus release nitrification combined tank, an anoxic tank and a secondary sedimentation tank which are sequentially arranged according to the water flow direction; the phosphorus release and nitrification combined tank, the anoxic tank and the secondary sedimentation tank are sequentially communicated; a first-stage sedimentation mechanism is arranged in the anoxic tank; the first-stage precipitation mechanism is communicated with the water body in the anoxic tank; the primary sedimentation mechanism is used for primarily separating mud from water of the mixed liquor in the anoxic tank; a reflux sludge pipe and a secondary sedimentation water outlet pipe are arranged on the secondary sedimentation tank, and the reflux sludge pipe is communicated with the phosphorus release nitrification combined tank; the anoxic tank adopts a circulating channel tank type.
In one embodiment, the first-stage precipitation mechanism is connected with a supernatant water outlet overrun pipe, and the supernatant water outlet overrun pipe is connected with the second-stage precipitation water outlet pipe in parallel; the anoxic tank is communicated with a mixed liquid outlet pipe, and the mixed liquid outlet pipe is arranged at the tail end of the anoxic tank; and a water outlet control valve is arranged on the mixed liquid water outlet pipe, and the mixed liquid water outlet pipe is communicated with the secondary sedimentation tank.
In one embodiment, the first-stage precipitation mechanism is connected with a supernatant water outlet pipe; the anoxic tank is communicated with a mixed liquid outlet pipe, and the mixed liquid outlet pipe is arranged at the tail end of the anoxic tank; a water outlet control valve is arranged on the mixed liquid water outlet pipe; and the supernatant water outlet pipe is communicated with the mixed liquid water outlet pipe in parallel with the secondary sedimentation tank.
In one embodiment, a supernatant outlet control valve is arranged on the supernatant outlet pipe; an overrun water outlet pipe is communicated with the supernatant water outlet pipe and is arranged between the primary sedimentation mechanism and the supernatant water outlet control valve; the overrun water outlet pipe is also provided with an overrun water outlet control valve; and the overrunning water outlet pipe is connected with the secondary sedimentation water outlet pipe in parallel.
In one embodiment, the primary sedimentation mechanism is comprised of a plurality of sedimentation carriers; a precipitation gap is reserved among a plurality of precipitation carriers.
In one embodiment, the phosphorus release and nitrification combined tank comprises an anaerobic tank and an aerobic tank which are sequentially arranged according to the water flow direction, and the anaerobic tank is communicated with the aerobic tank; the aerobic tank is communicated with the anoxic tank; the reflux sludge pipe is communicated with the anaerobic tank; an anaerobic reflux control valve is arranged between the reflux sludge pipe and the anaerobic tank; and a return sludge power mechanism is arranged on the return sludge pipe.
In one embodiment, the return sludge pipe communicates the anaerobic tank and the anoxic tank from the secondary sedimentation tank; an anoxic reflux control valve is arranged between the reflux sludge pipe and the anoxic tank; the return sludge power mechanism is arranged on the return sludge pipe between the anoxic tank and the secondary sedimentation tank.
In one embodiment, a stirring mechanism is installed in the anoxic tank, and the stirring mechanism is arranged between the bottom of the primary sedimentation mechanism and the bottom of the anoxic tank.
In one embodiment, an air flushing mechanism is arranged in the anoxic tank; the air nozzle of the air flushing mechanism covers the bottom of the primary sedimentation mechanism.
The invention also provides a process method, which comprises the following steps: sewage to be treated and return sludge enter the anaerobic tank; the mixed solution of sewage which is subjected to anaerobic reaction in the anaerobic tank enters the aerobic tank;
the sewage completes the nitration reaction in the aerobic tank;
the mixed solution of the sewage subjected to the nitration reaction in the aerobic tank enters the anoxic tank;
a part of mixed liquor effluent in the anoxic tank enters the primary sedimentation mechanism for preliminary separation of mud and water; the primary sedimentation mechanism separates primary sludge and primary supernatant;
the primary sludge separated by the primary sedimentation mechanism is left in the anoxic tank;
the other part of mixed liquid effluent of the anoxic tank enters the secondary sedimentation tank for mud-water separation;
the primary supernatant and the mixed liquid of the residual effluent of the anoxic tank enter the secondary sedimentation tank together for mud-water separation;
the secondary sedimentation tank realizes mud-water separation, and the separated clear water is discharged out of the secondary sedimentation tank; the separated sludge is divided into two parts, one part is used as reflux sludge to flow back to the starting end of the anaerobic tank, and the other part is used as residual sludge to be discharged out of the secondary sedimentation tank.
The beneficial effects of the invention are as follows:
the primary sedimentation mechanism is arranged at the upper part in the anoxic tank to realize primary mud-water separation on water flow in the anoxic tank; settling sludge in the water flow, and simultaneously settling the sludge from the primary settling mechanism to a mixed solution between the bottom of the anoxic tank and the bottom of the primary settling mechanism; the supernatant fluid of the primary sedimentation mechanism and the mixed liquid effluent of the other part of the anoxic tank are discharged into the secondary sedimentation tank together for mud-water separation, and part of sludge separated by the secondary sedimentation tank flows back to the phosphorus release nitrification combined tank; because the precipitation part of the device adopts two-stage precipitation, the solid load of the sludge in the secondary sedimentation tank is greatly reduced, the tank capacity of the secondary sedimentation tank is further reduced, and meanwhile, the energy consumption of the backflow sludge in the anoxic tank is also saved. The device reduces the investment of a sedimentation tank in the AOA technology, saves the occupied area, reduces the cost of the sewage treatment process, and realizes lean management.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a first embodiment of the present invention;
FIG. 2 is a schematic overall top view of a first embodiment of the present invention;
FIG. 3 is a schematic overall structure of a second embodiment of the present invention;
FIG. 4 is a schematic top view of a second embodiment of the present invention;
FIG. 5 is a schematic view showing the overall structure of a third embodiment of the present invention;
FIG. 6 is a schematic overall structure of a fourth embodiment of the present invention;
fig. 7 is a schematic overall structure of a fifth embodiment of the present invention.
Wherein, the reference numerals are as follows:
1. a phosphorus release and nitrification combined pool; 11. an anaerobic tank; 111. an anaerobic reflux control valve; 112. a water inlet pipe; 12. an aerobic tank;
2. an anoxic tank; 21. a mixed liquid outlet pipe; 211. a water outlet control valve; 22. an anoxic reflux control valve; 23. a stirring mechanism; 24. a gas flushing mechanism; 241. an air jet; 25. partition walls; 26. a guide wall;
3. a first-stage precipitation mechanism; 31. a supernatant outlet pipe; 311. supernatant effluent control valve; 32. precipitating the carrier; 33. supernatant effluent exceeds the tube; 34. exceeding the water outlet pipe; 341. beyond the water outlet control valve;
4. a secondary sedimentation tank; 41. a second-stage precipitation water outlet pipe; 42. a sludge pipe; 421. a sludge control valve;
5. a return sludge pipe; 51. and a return sludge power mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The first embodiment of the two-stage AOA sedimentation sewage biochemical treatment device is shown in figures 1 and 2, and comprises a phosphorus release nitrification combined tank 1, an anoxic tank 2 and a secondary sedimentation tank 4 which are sequentially arranged according to the water flow direction; the phosphorus release and nitrification combined tank 1, the anoxic tank 2 and the secondary sedimentation tank 4 are sequentially communicated; a first-stage sedimentation mechanism 3 is arranged in the anoxic tank 2; the first-stage precipitation mechanism 3 is communicated with the water body in the anoxic tank 2; the first-stage precipitation mechanism 3 is used for primarily separating mud from water of the mixed solution in the anoxic tank 2; a reflux sludge pipe 5 and a secondary sedimentation water outlet pipe 41 are arranged on the secondary sedimentation tank 4, and the reflux sludge pipe 5 is communicated with the phosphorus release nitrification combined tank 1; the anoxic tank 2 adopts a circulating channel tank type.
Regarding the above-described combined pool 1 for releasing phosphorus and nitrifying, the combined pool 1 for releasing phosphorus is actually a sewage treatment pool comprising a pool for releasing phosphorus in sewage and a pool for nitrifying organic nitrogen and ammonia nitrogen in sewage.
In particular, the secondary sedimentation water outlet pipe 41 is used for discharging water treated by the secondary sedimentation tank 4, the secondary sedimentation tank 4 is also provided with a sludge pipe 42 for discharging residual sludge of the secondary sedimentation tank 4, and in order to control the discharge of the residual sludge, the sludge pipe 42 is also provided with a sludge control valve 421; in the sewage treatment, the secondary sedimentation tank 4 is a lower-stage treatment device, and a secondary sedimentation water outlet pipe 41, a sludge pipe 42, a sludge control valve 421 and other components for discharging the treated water and sludge in the secondary sedimentation tank 4 are arranged; the anaerobic tank is provided with a water inlet pipe 112, and the water inlet pipe 112 is used for injecting sewage to be treated into the anaerobic tank. The arrangement of the above-mentioned components is a conventional operation in the field of sewage treatment apparatuses, and is therefore not described in detail in the claims.
Regarding the pool type adopted for the above-mentioned anoxic pool 2, as shown in fig. 1 and 2, the anoxic pool 2 adopts a circulation channel pool type.
Specifically, the specific structure of the circulation channel pool type comprises a partition wall 25 and a guide wall 26; wherein, a partition wall 25 and a guide wall 26 are arranged in the anoxic tank 2; the two ends of the anoxic tank 2 are provided with guide walls 26 according to the water flow direction of the tank water, the cross section of the guide walls 26 is semicircular, and the concave parts of the two guide walls 26 are oppositely arranged; the partition wall 25 is disposed between the two guide walls 26.
The beneficial effects are that: is beneficial to accelerating the sedimentation of sewage flowing into the anoxic tank 2 in the anoxic tank 2.
The device realizes primary mud-water separation on water flow in the anoxic tank 2 by arranging a primary sedimentation mechanism 3 at the upper part in the anoxic tank 2; the sludge in the water flow is settled, and meanwhile, the sludge is settled from the first-stage settling mechanism 3 to the mixed liquid between the bottom of the anoxic tank 2 and the bottom of the first-stage settling mechanism 3; the supernatant fluid of the first-stage sedimentation mechanism 3 and the mixed liquor effluent of the other part of anoxic tank 2 are discharged into the secondary sedimentation tank 4 together for mud-water separation, one part of sludge separated by the secondary sedimentation tank 4 flows back to the anaerobic tank 11, and the other part of sludge is discharged to a lower-stage treatment system as residual sludge; all treated effluent is discharged from the secondary sedimentation outlet pipe 41 of the secondary sedimentation tank 4. Because the precipitation part of the device adopts two-stage precipitation, the solid load of the sludge in the secondary sedimentation tank 4 is greatly reduced, the tank capacity of the secondary sedimentation tank 4 is further reduced, and the energy consumption of the backflow sludge of the anoxic tank 2 is also saved. The device reduces the investment of a sedimentation tank in the AOA technology, saves the occupied area, reduces the cost of the sewage treatment process, and realizes lean management.
As an alternative to the implementation of the method,
further, regarding the specific arrangement mode of the first-stage precipitation mechanism 3, as shown in fig. 1, the first-stage precipitation mechanism 3 is connected with a supernatant water outlet overrunning pipe 33, and the supernatant water outlet overrunning pipe 33 is connected in parallel with a second-stage precipitation water outlet pipe 41; the anoxic tank 2 is communicated with a mixed liquid outlet pipe 21, and the mixed liquid outlet pipe 21 is arranged at the tail end of the anoxic tank 2; the mixed liquor outlet pipe 21 is provided with an outlet control valve 211, and the mixed liquor outlet pipe 21 is communicated with the secondary sedimentation tank 4.
The second embodiment of the two-stage AOA sedimentation sewage biochemical treatment device is shown in fig. 3 and 4, and comprises a phosphorus release nitrification combined tank 1, an anoxic tank 2 and a secondary sedimentation tank 4 which are sequentially arranged according to the water flow direction; the phosphorus release and nitrification combined tank 1, the anoxic tank 2 and the secondary sedimentation tank 4 are sequentially communicated; a first-stage sedimentation mechanism 3 is arranged in the anoxic tank 2; the first-stage precipitation mechanism 3 is communicated with the water body in the anoxic tank 2; the first-stage precipitation mechanism 3 is used for primarily separating mud from water of the mixed solution in the anoxic tank 2; a reflux sludge pipe 5 and a secondary sedimentation water outlet pipe 41 are arranged on the secondary sedimentation tank 4, and the reflux sludge pipe 5 is communicated with the phosphorus release nitrification combined tank 1; the anoxic tank 2 adopts a circulating channel tank type.
Further, in the specific arrangement mode of the first-stage precipitation mechanism 3, as shown in fig. 3, the first-stage precipitation mechanism 3 is connected with a supernatant water outlet pipe 31; the anoxic tank 2 is communicated with a mixed liquid outlet pipe 21, and the mixed liquid outlet pipe 21 is arranged at the tail end of the anoxic tank 2; a water outlet control valve 211 is arranged on the mixed liquor water outlet pipe 21; the supernatant outlet pipe 31 is connected with the mixed liquor outlet pipe 21 in parallel and communicated with the secondary sedimentation tank 4.
When the device is applied, the supernatant liquid outlet pipe 31 is connected with the mixed liquid outlet pipe 21 in parallel, and when the anoxic tank 2 conveys water flow to the secondary sedimentation tank 4, the supernatant liquid in the primary sedimentation mechanism 3 and the mixed liquid of the anoxic tank 2 are mixed and conveyed to the secondary sedimentation tank 4, and most suspended matters in the water flow are removed by sedimentation of the primary sedimentation mechanism 3, so that the sludge amount entering the secondary sedimentation tank 4 is reduced; the output quantity of the mixed liquor is regulated through the water outlet control valve 211 on the mixed liquor outlet pipe 21, so that the sludge quantity entering the secondary sedimentation tank 4 from the anoxic tank 2 is controlled, and the effects of reducing the solid load of the secondary sedimentation tank 4 and optimizing sewage treatment are achieved.
Regarding the specific constitution of the above-mentioned primary sedimentation mechanism 3, this embodiment is shown in fig. 3 and 4, the primary sedimentation mechanism 3 being composed of a plurality of sedimentation carriers 32; a plurality of precipitation carriers 32 leave a precipitation gap therebetween.
Specifically, the above-mentioned bottom carrier may be a precipitation plate, a precipitation tube or other precipitation module as the precipitation carrier 32; wherein the preferred sedimentation plate or sedimentation tube is arranged obliquely in the anoxic tank 2.
Regarding the specific treatment tank group of the above-mentioned phosphorus-releasing nitrification combined tank 1, as shown in fig. 3 and 4, the phosphorus-releasing nitrification combined tank 1 includes an anaerobic tank 11 and an aerobic tank 12 sequentially arranged in the water flow direction, and the anaerobic tank 11 is communicated with the aerobic tank 12; the aerobic tank 12 is communicated with the anoxic tank 2; the reflux sludge pipe 5 is communicated with the anaerobic tank 11; an anaerobic reflux control valve 111 is arranged between the reflux sludge pipe 5 and the anaerobic tank 11; the return sludge pipe 5 is provided with a return sludge power mechanism 51.
Wherein an anaerobic backflow control valve 111 is installed on the backflow sludge pipe 5, and the anaerobic backflow control valve 111 is arranged adjacent to the anaerobic tank 11; the return sludge power mechanism 51 may be a sludge pump or a sludge lifting device.
In order to uniformly stir the mixed liquid in the anoxic tank 2, as shown in fig. 3 and 4, a stirring mechanism 23 is installed in the anoxic tank 2, and the stirring mechanism 23 is arranged between the bottom of the primary sedimentation mechanism 3 and the bottom of the anoxic tank 2.
The beneficial effects are that: the stirring mechanism 23 is arranged in the anoxic tank 2, so that the sludge precipitated in the first-stage precipitation mechanism 3 falls into the mixed liquor of the anoxic tank 2, and the precipitated sludge and the mixed liquor in the anoxic tank 2 are mixed more uniformly.
Specifically, the stirring mechanism 23 is a stirrer for stirring sewage in sewage treatment; the stirring mechanisms 23 are provided in two, and referring to fig. 4, the two stirring mechanisms 23 are respectively provided at two sides of the partition wall 25, and the stirring directions of the two stirrers are oppositely arranged.
The beneficial effects are that: the anoxic tank 2 adopts a circulating channel tank type, and the arrangement of the two agitators can accelerate the water flow in the anoxic tank 2 to circularly flow, so that the mixed liquid in the anoxic tank 2 is in a fully mixed state.
A third embodiment of the two-stage AOA-precipitation sewage biochemical treatment apparatus is shown in fig. 5, which differs from the second embodiment in that a return sludge pipe 5 communicates an anaerobic tank 11 and an anoxic tank 2 from a secondary sedimentation tank 4; an anoxic reflux control valve 22 is arranged between the reflux sludge pipe 5 and the anoxic tank 2; the return sludge power mechanism 51 is installed on the return sludge pipe 5 between the anoxic tank 2 and the secondary sedimentation tank 4.
Wherein, regarding the anoxic backflow control valve 22, the backflow sludge pipe 5 is connected in parallel with the anaerobic tank 11 and the anoxic tank 2, and the anoxic backflow control valve 22 is installed on the branch pipe of the backflow sludge pipe 5 connected with the anoxic tank 2.
A fourth embodiment of the two-stage AOA precipitation sewage biochemical treatment device is shown in fig. 6, and the difference between this embodiment and the second embodiment is that a supernatant outlet control valve 311 is installed on a supernatant outlet pipe 31; the supernatant water outlet pipe 31 is communicated with an overrun water outlet pipe 34, and the overrun water outlet pipe 34 is arranged between the primary sedimentation mechanism 3 and the supernatant water outlet control valve 311; the overrun water outlet pipe 34 is also provided with an overrun water outlet control valve 341; the overrunning water outlet pipe 34 is connected in parallel with the secondary sedimentation water outlet pipe 41.
A fifth embodiment of a two-stage AOA-precipitation sewage biochemical treatment apparatus is shown in fig. 7, and this embodiment differs from the second embodiment in that an air flushing mechanism 24 is installed in the anoxic tank 2; the gas jet 241 of the gas flushing mechanism 24 covers the bottom of the primary sedimentation mechanism 3.
Specifically, the air flushing mechanism 24 is generally composed of an air source device (such as an air compressor) +an air pipe+a nozzle; as shown in fig. 1, the nozzles may be arranged in rows corresponding to the bottom area of the first-stage precipitation mechanism 3, and the air nozzles 241 are air outlets of the nozzles, which are not described in detail in the prior art.
The beneficial effects are that: the first-stage sedimentation mechanism 3 allows the settled sludge to fall into the mixed liquid between the bottom of the anoxic tank 2 and the bottom of the first-stage sedimentation mechanism 3 through the gaps between the sedimentation carriers 32, and the gas flushing mechanism 24 can avoid the gap blockage between the sedimentation carriers 32, thereby improving the reliability of the first-stage sedimentation mechanism 3.
The sixth embodiment of the two-stage AOA sedimentation sewage biochemical treatment device combines all the technical features of the second, third and fifth embodiments.
The beneficial effects are that: the sewage treatment effect of the two-stage AOA sedimentation sewage biochemical treatment device can reach the optimal state; meanwhile, the secondary sedimentation tank 4 of the two-stage AOA sedimentation sewage biochemical treatment device is beneficial to running in the sewage treatment process flow with less solid load, so that the volume of the secondary sedimentation tank 4 is controlled to be less, and the sewage treatment cost is more controllable.
The process, in this embodiment as shown in fig. 3 and 4, includes: sewage to be treated and return sludge are fed into an anaerobic tank 11; the mixed solution of sewage which is subjected to anaerobic reaction in the anaerobic tank 11 enters the aerobic tank 12;
the sewage completes the nitration reaction in the aerobic tank 12;
the mixed solution of the sewage subjected to the nitration reaction in the aerobic tank 12 enters the anoxic tank 2;
part of mixed liquid effluent in the anoxic tank 2 enters a first-stage precipitation mechanism 3 for preliminary mud-water separation; the first-stage precipitation mechanism 3 separates first-stage sludge and first-stage supernatant;
the primary sludge separated by the primary sedimentation mechanism 3 is left in the anoxic tank 2;
the other part of mixed liquid effluent of the anoxic tank 2 enters a secondary sedimentation tank 4 for mud-water separation;
the first-stage supernatant and the mixed water of the rest effluent of the anoxic tank 2 enter a secondary sedimentation tank 4 together for mud-water separation;
the secondary sedimentation tank 4 realizes mud-water separation, and the separated clear water is discharged out of the secondary sedimentation tank 4; the separated sludge is divided into two parts, one part is used as reflux sludge to flow back to the starting end of the anaerobic tank 11, and the other part is used as residual sludge to be discharged out of the secondary sedimentation tank 4.
When the method is applied, the method is suitable for the sewage treatment condition of the second embodiment of the two-stage AOA precipitation sewage biochemical treatment device.
In particular, unlike the above-mentioned process method, in order to make the sewage treatment effect of the two-stage AOA sedimentation sewage biochemical treatment device better, the first-stage supernatant separated by the above-mentioned first-stage sedimentation mechanism 3 needs to confirm the water to go according to the actual engineering project or operation effect;
with the first embodiment of the two-stage AOA sedimentation sewage biochemical treatment device, when the quality of the primary supernatant is good, the primary supernatant enters the supernatant water outlet override pipe 33 to override the process section of the secondary sedimentation tank 4, and the primary supernatant is directly mixed with the water outlet in the secondary sedimentation water outlet pipe of the secondary sedimentation tank 4 to enter the subsequent treatment stage.
With the fourth embodiment of the two-stage AOA sedimentation sewage biochemical treatment device, when the quality of the supernatant fluid is poor, the supernatant fluid enters the supernatant fluid outlet pipe 31, and the supernatant fluid enters the secondary sedimentation tank 4 together with the rest of the effluent mixed liquid in the mixed liquid outlet pipe 21 of the anoxic tank 2 for mud-water separation under the control of the supernatant fluid outlet control valve 311.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A two-stage AOA sedimentation sewage biochemical treatment device is characterized in that,
comprises a phosphorus release and nitrification combined tank, an anoxic tank and a secondary sedimentation tank which are sequentially arranged according to the water flow direction;
the phosphorus release and nitrification combined tank, the anoxic tank and the secondary sedimentation tank are sequentially communicated;
a first-stage sedimentation mechanism is arranged in the anoxic tank; the first-stage precipitation mechanism is communicated with the water body in the anoxic tank; the primary sedimentation mechanism is used for primarily separating mud from water of the mixed liquor in the anoxic tank;
a reflux sludge pipe and a secondary sedimentation water outlet pipe are arranged on the secondary sedimentation tank, and the reflux sludge pipe is communicated with the phosphorus release nitrification combined tank;
the anoxic tank adopts a circulating channel tank type.
2. The two-stage AOA sedimentation sewage biochemical treatment device according to claim 1, wherein,
the first-stage precipitation mechanism is communicated with a supernatant water outlet overrun pipe, and the supernatant water outlet overrun pipe is communicated with the second-stage precipitation water outlet pipe in parallel;
the anoxic tank is communicated with a mixed liquid outlet pipe, and the mixed liquid outlet pipe is arranged at the tail end of the anoxic tank;
and a water outlet control valve is arranged on the mixed liquid water outlet pipe, and the mixed liquid water outlet pipe is communicated with the secondary sedimentation tank.
3. The two-stage AOA sedimentation sewage biochemical treatment device according to claim 1, wherein,
the first-stage precipitation mechanism is connected with a supernatant water outlet pipe;
the anoxic tank is communicated with a mixed liquid outlet pipe, and the mixed liquid outlet pipe is arranged at the tail end of the anoxic tank;
a water outlet control valve is arranged on the mixed liquid water outlet pipe;
and the supernatant water outlet pipe is communicated with the mixed liquid water outlet pipe in parallel with the secondary sedimentation tank.
4. A two-stage AOA sedimentation sewage biochemical treatment device according to claim 3, wherein,
a supernatant outlet control valve is arranged on the supernatant outlet pipe;
an overrun water outlet pipe is communicated with the supernatant water outlet pipe and is arranged between the primary sedimentation mechanism and the supernatant water outlet control valve;
the overrun water outlet pipe is also provided with an overrun water outlet control valve;
and the overrunning water outlet pipe is connected with the secondary sedimentation water outlet pipe in parallel.
5. A two-stage AOA sedimentation sewage biochemical treatment device according to claim 3, wherein,
the first-stage precipitation mechanism consists of a plurality of precipitation carriers;
a precipitation gap is reserved among a plurality of precipitation carriers.
6. The two-stage AOA sedimentation sewage biochemical treatment device according to claim 5, wherein,
the phosphorus release and nitrification combined tank comprises an anaerobic tank and an aerobic tank which are sequentially arranged according to the water flow direction, and the anaerobic tank is communicated with the aerobic tank;
the aerobic tank is communicated with the anoxic tank;
the reflux sludge pipe is communicated with the anaerobic tank; an anaerobic reflux control valve is arranged between the reflux sludge pipe and the anaerobic tank;
and a return sludge power mechanism is arranged on the return sludge pipe.
7. The two-stage AOA sedimentation sewage biochemical treatment device according to claim 6, wherein,
the reflux sludge pipe is communicated with the anaerobic tank and the anoxic tank from the secondary sedimentation tank;
an anoxic reflux control valve is arranged between the reflux sludge pipe and the anoxic tank;
the return sludge power mechanism is arranged on the return sludge pipe between the anoxic tank and the secondary sedimentation tank.
8. The two-stage AOA sedimentation sewage biochemical treatment device according to claim 1, wherein,
and a stirring mechanism is arranged in the anoxic tank, and is arranged between the bottom of the primary sedimentation mechanism and the bottom of the anoxic tank.
9. The two-stage AOA sedimentation sewage biochemical treatment device according to claim 1, wherein,
an air flushing mechanism is arranged in the anoxic tank;
the air nozzle of the air flushing mechanism covers the bottom of the primary sedimentation mechanism.
10. A process method, which is characterized in that the two-stage AOA sedimentation sewage biochemical treatment device is applied to the process method,
comprising the following steps: sewage to be treated and return sludge enter the anaerobic tank; the mixed solution of sewage which is subjected to anaerobic reaction in the anaerobic tank enters the aerobic tank;
the sewage completes the nitration reaction in the aerobic tank;
the mixed solution of the sewage subjected to the nitration reaction in the aerobic tank enters the anoxic tank;
a part of mixed liquor effluent in the anoxic tank enters the primary sedimentation mechanism for preliminary separation of mud and water; the primary sedimentation mechanism separates primary sludge and primary supernatant;
the primary sludge separated by the primary sedimentation mechanism is left in the anoxic tank;
the other part of mixed liquid effluent of the anoxic tank enters the secondary sedimentation tank for mud-water separation;
the primary supernatant and the mixed liquid of the residual effluent of the anoxic tank enter the secondary sedimentation tank together for mud-water separation;
the secondary sedimentation tank realizes mud-water separation, and the separated clear water is discharged out of the secondary sedimentation tank; the separated sludge is divided into two parts, one part is used as reflux sludge to flow back to the starting end of the anaerobic tank, and the other part is used as residual sludge to be discharged out of the secondary sedimentation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310246452.7A CN116177741A (en) | 2023-03-10 | 2023-03-10 | Two-stage AOA precipitation sewage biochemical treatment device and process method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310246452.7A CN116177741A (en) | 2023-03-10 | 2023-03-10 | Two-stage AOA precipitation sewage biochemical treatment device and process method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116177741A true CN116177741A (en) | 2023-05-30 |
Family
ID=86434551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310246452.7A Pending CN116177741A (en) | 2023-03-10 | 2023-03-10 | Two-stage AOA precipitation sewage biochemical treatment device and process method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116177741A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2789239Y (en) * | 2004-12-28 | 2006-06-21 | 茂名学院 | Integrated aerobic-anaerobic sewage treating device |
| CN203112657U (en) * | 2012-12-28 | 2013-08-07 | 上海亚同环保实业股份有限公司 | Constant-effluent variable-load SVBR (Steady outflow Variable load Biological Reactor) sewage treater |
| CN105110569A (en) * | 2015-09-16 | 2015-12-02 | 中国电建集团成都勘测设计研究院有限公司 | Contact oxidation sewage treatment system and contact oxidation sewage treatment technology |
| CN210595454U (en) * | 2019-07-26 | 2020-05-22 | 陈才高 | Superposed secondary sedimentation tank |
| CN113461257A (en) * | 2021-06-24 | 2021-10-01 | 贵州大学 | Integrated double-circulation oxidation ditch device for town sewage and treatment method |
| CN114455706A (en) * | 2021-12-21 | 2022-05-10 | 江苏裕隆环保有限公司 | Two mud backward flow AOA degree of depth denitrogenation systems of sewage |
| CN114702136A (en) * | 2022-04-19 | 2022-07-05 | 青岛思普润水处理股份有限公司 | AOA coupling efficient autotrophic nitrogen removal water treatment method and system |
| CN114716006A (en) * | 2022-04-19 | 2022-07-08 | 青岛思普润水处理股份有限公司 | BFM form-based efficient AOA sewage treatment system and method |
| CN114772846A (en) * | 2022-04-11 | 2022-07-22 | 湖南子宏生态科技股份有限公司 | High-efficient nitrogen and phosphorus removal processing system |
-
2023
- 2023-03-10 CN CN202310246452.7A patent/CN116177741A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2789239Y (en) * | 2004-12-28 | 2006-06-21 | 茂名学院 | Integrated aerobic-anaerobic sewage treating device |
| CN203112657U (en) * | 2012-12-28 | 2013-08-07 | 上海亚同环保实业股份有限公司 | Constant-effluent variable-load SVBR (Steady outflow Variable load Biological Reactor) sewage treater |
| CN105110569A (en) * | 2015-09-16 | 2015-12-02 | 中国电建集团成都勘测设计研究院有限公司 | Contact oxidation sewage treatment system and contact oxidation sewage treatment technology |
| CN210595454U (en) * | 2019-07-26 | 2020-05-22 | 陈才高 | Superposed secondary sedimentation tank |
| CN113461257A (en) * | 2021-06-24 | 2021-10-01 | 贵州大学 | Integrated double-circulation oxidation ditch device for town sewage and treatment method |
| CN114455706A (en) * | 2021-12-21 | 2022-05-10 | 江苏裕隆环保有限公司 | Two mud backward flow AOA degree of depth denitrogenation systems of sewage |
| CN114772846A (en) * | 2022-04-11 | 2022-07-22 | 湖南子宏生态科技股份有限公司 | High-efficient nitrogen and phosphorus removal processing system |
| CN114702136A (en) * | 2022-04-19 | 2022-07-05 | 青岛思普润水处理股份有限公司 | AOA coupling efficient autotrophic nitrogen removal water treatment method and system |
| CN114716006A (en) * | 2022-04-19 | 2022-07-08 | 青岛思普润水处理股份有限公司 | BFM form-based efficient AOA sewage treatment system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6787035B2 (en) | Bioreactor for treating wastewater | |
| KR100350893B1 (en) | Nitrogen and Phosphorous Removing Methods and Equipment with Solids Separation between the Reactors, Dynamic Flow and Intermittent Aeration | |
| CN108996840B (en) | Sewage treatment equipment and method for strengthening combination of biological denitrification and flat ceramic membrane | |
| CN104891656A (en) | Integrated sewage treatment tank for improving AAO (Anaerobic-Anoxic-Oxic) process and sewage treatment method | |
| CN112250186A (en) | High-efficiency synchronous nitrification and denitrification reactor | |
| CN110790374A (en) | Inversion A2O + composite MBR sewage treatment device and treatment method thereof | |
| CN100369830C (en) | Waste water treating process of circulation sequence batched active sludge and its active sludge reactor | |
| CN210001741U (en) | Sewage treatment device | |
| CN107973402B (en) | Plug flow type AO reactor | |
| CN112408588A (en) | Self-circulation sewage treatment reaction tank based on MBR sludge-water separation | |
| KR100454362B1 (en) | Sequencing Batch Reactor with Variable partitions and Wastewater treatment system using same that | |
| CN115353205B (en) | Biochemical reaction system and sewage treatment method | |
| CN114604971B (en) | BioDopp biochemical reaction system for reinforcing biological phosphorus removal and sewage treatment method | |
| CN103058464A (en) | Intermittent-continuous aeration process for aerobic tanks | |
| CN216236264U (en) | Denitrifying phosphorus removal integrated sewage treatment equipment | |
| CN116177741A (en) | Two-stage AOA precipitation sewage biochemical treatment device and process method | |
| CN115385451A (en) | Two-stage A/O activated sludge process sewage treatment system and process | |
| CN212833333U (en) | Combined sewage treatment device | |
| CN112174324A (en) | Leachate biochemical section treatment system and method for efficient denitrification | |
| KR100446107B1 (en) | Bioreactor for Treating Wastewater | |
| KR100195903B1 (en) | Nitrogen and phosphor removal method and device of organic wastewater | |
| CN216236265U (en) | Multistage anoxic-aerobic integrated sewage treatment equipment | |
| CN211111572U (en) | High-toxicity and degradation-resistant wastewater treatment system | |
| CN114590895B (en) | Multistage circulation denitrification treatment device and multistage circulation denitrification treatment process for rare earth tail water | |
| CN114105297B (en) | Continuous flow self-circulation aerobic granular sludge processor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |