CN116675330B - Circulation clarifier and application thereof - Google Patents
Circulation clarifier and application thereof Download PDFInfo
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- CN116675330B CN116675330B CN202310967966.1A CN202310967966A CN116675330B CN 116675330 B CN116675330 B CN 116675330B CN 202310967966 A CN202310967966 A CN 202310967966A CN 116675330 B CN116675330 B CN 116675330B
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- 238000007872 degassing Methods 0.000 claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 99
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000010802 sludge Substances 0.000 claims abstract description 52
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 28
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 27
- 230000003647 oxidation Effects 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims description 22
- 238000004062 sedimentation Methods 0.000 claims description 22
- 239000002893 slag Substances 0.000 claims description 18
- 238000011084 recovery Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000000630 rising effect Effects 0.000 claims description 10
- 230000004907 flux Effects 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 30
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 20
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 12
- 239000007789 gas Substances 0.000 abstract description 10
- 238000000926 separation method Methods 0.000 abstract description 8
- 239000002351 wastewater Substances 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 241001453382 Nitrosomonadales Species 0.000 description 42
- 238000007599 discharging Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 4
- 238000005273 aeration Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 244000005700 microbiome Species 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 241000191043 Rhodobacter sphaeroides Species 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 230000009935 nitrosation Effects 0.000 description 1
- 238000007034 nitrosation reaction Methods 0.000 description 1
- XKLJHFLUAHKGGU-UHFFFAOYSA-N nitrous amide Chemical compound ON=N XKLJHFLUAHKGGU-UHFFFAOYSA-N 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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
- C02F3/006—Regulation methods for biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- 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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- 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
Abstract
The application discloses a circulation clarifier and application thereof, relating to the technical field of wastewater or sewage purification treatment equipment, which is provided with a water outlet unit and a degassing unit, wherein the degassing unit comprises a first degassing part and a second degassing part which are sequentially arranged from top to bottom; the water outlet unit is arranged between the two first degassing parts; a downward flow channel is formed between the degassing unit and the inner wall of the circulating clarifier, an upward flow channel is formed in the space of the second degassing part towards one side of the water outlet unit, and the gas is discharged through the first degassing part. The application solves the problems that in the prior art, during the gas-liquid-solid separation process, gas often drives substances such as sludge, strains and the like to float upwards and discharge along with water, and especially in the one-stage short-cut nitrification-anaerobic ammonia oxidation process, after ammonia nitrogen and nitrite nitrogen are converted into nitrogen, the nitrogen drives AnAOB to discharge along with water, so that the nitrite nitrogen is continuously accumulated, and further the AnAOB is inhibited, and the risk of reaction system breakdown exists.
Description
Technical Field
The application relates to the technical field of wastewater or sewage purification treatment equipment, in particular to a circulating clarifier and application thereof.
Background
The high ammonia nitrogen wastewater is wastewater with great treatment difficulty in industrial wastewater, and how to treat the high ammonia nitrogen wastewater with high efficiency, economy and low carbon is one of important research directions in the field of global environmental protection. Anaerobic ammoxidation (Anaerobic ammonium oxidation, anammox) can achieve autotrophic denitrification without adding a carbon source, is efficient, low-consumption and environment-friendly, and is called as the most efficient biological denitrification technology so far.
Because the electron acceptor nitrite nitrogen required for anaerobic ammoxidation is not common in water, and short-cut nitrification processes can provide a stable source of nitrite nitrogen, the short-cut nitrification-anaerobic ammoxidation (partial nitrification-anammox, PN/a) combination process is applied to total nitrogen removal. However, the high efficiency and low consumption denitrification capability does not allow for the widespread use of anaerobic ammonia oxidation technology in engineering applications for high ammonia nitrogen wastewater treatment.
Currently, short-cut nitrification-anaerobic ammoxidation processes are roughly divided into two types, namely two-stage type and one-stage type. The two-stage short-cut nitrification-anaerobic ammoxidation process requires two reactors with different operating conditions. The first stage is to control the reaction of ammonia nitrogen-containing wastewater in a short-cut nitrification stage by controlling the reaction conditions (temperature, pH value, dissolved oxygen and the like) of the aerobic stage, wherein about half of ammonia nitrogen is converted into nitrite nitrogen, and the nitrite nitrogen and the rest ammonia nitrogen enter the anaerobic stage and are converted into nitrogen under the action of anaerobic ammonia oxidizing bacteria (AnAOB) to complete biological denitrification of the wastewater, and the ratio of the nitrite nitrogen and the ammonia nitrogen in the first stage is difficult to control in the two-stage short-cut nitrification-anaerobic ammonia oxidation process, which is a difficulty in process operation.
The one-stage short-cut nitrification-anaerobic ammonia oxidation process is to perform nitrosation and anaerobic ammonia oxidation reactions simultaneously in one reactor, and ammonia nitrogen is removed through the combined action of Ammonia Oxidizing Bacteria (AOB) and AnAOB. Firstly, the AOB converts ammonia nitrogen into nitrite nitrogen by using dissolved oxygen in the environment, and meanwhile, the AnAOB performs anaerobic ammoxidation reaction on the generated nitrite nitrogen and ammonia nitrogen in the environment to convert the ammonia nitrogen and the nitrite nitrogen into nitrogen. The method has the advantages of low infrastructure cost and relatively low control difficulty, and is more widely applied than a two-stage process.
In the one-stage process, two bacteria, namely AOB and AnAOB, play an important role together, the AOB performs a short-range nitrification function, ammonia nitrogen is converted into nitrite, and the AnAOB converts the ammonia nitrogen and nitrite nitrogen into nitrogen so as to perform a denitrification function. Therefore, the biomass stabilization of AnAOB and AOB is a key factor for realizing efficient denitrification and stable operation of PN/A. But AOB grows relatively fast, with doubling times typically around 10 days, while AnAOB grows very slowly, with doubling times typically between 20 and 30 days. The problem with this one-stage process is that on the one hand, AOB grows faster than AnAOB and more short-cut nitrification occurs to convert ammonia nitrogen to nitrous nitrogen, which is not consumed by AnAOB; on the other hand, the generated nitrogen drives the sludge to float upwards and simultaneously drives AnAOB to drain and run away along with the effluent; the nitrosamine is continuously accumulated, and then the AnAOB is inhibited, and finally the whole system is crashed.
Therefore, aiming at the one-section short-cut nitrification-anaerobic ammonia oxidation process, the good reciprocal symbiotic relationship of the AOB and the AnAOB is ensured, and meanwhile, effective interception of the AnAOB is realized, so that the method is a critical condition for realizing stable operation of the AnAOB.
Disclosure of Invention
The application provides a circulation clarifier and application thereof, wherein the circulation clarifier is provided with a degassing unit and is suitable for being applied to water treatment equipment, in particular to a one-stage short-cut nitrification-anaerobic ammonia oxidation reactor. The problems that in the prior art, during the gas-liquid-solid separation process, gas often drives substances such as sludge, strains and the like to float upwards and discharge along with water, and especially in the one-stage short-cut nitrification-anaerobic ammonia oxidation process, after ammonia nitrogen and nitrite nitrogen are converted into nitrogen, the nitrogen drives AnAOB to run off along with discharge of water, so that the nitrite nitrogen is continuously accumulated, and further the AnAOB is inhibited, and the risk of collapse of a reaction system exists.
The application aims at realizing the technical scheme that the application provides a circulation clarifier which is provided with a water outlet unit and a degassing unit, wherein the degassing unit comprises a first degassing part and a second degassing part which are sequentially arranged from top to bottom; the water outlet unit is arranged at one side of the first degassing part far away from the inner wall of the circulating clarifier; a downward flow channel is formed between the degassing unit and the inner wall of the circulation clarifier, an upward flow channel is formed in a space of the second degassing part towards one side of the water outlet unit, and gas is discharged through the first degassing part;
a circulating sedimentation zone is formed between the lower part of the degassing unit and the bottom of the circulating clarifier.
Preferably, the device further comprises a sludge discharge unit, wherein the sludge discharge unit comprises a sludge discharge pipeline, a recovery part and a return pipeline, one end of the sludge discharge pipeline is connected to the bottom of the water outlet unit, and the other end of the sludge discharge pipeline is connected to the recovery part; the return pipeline is used for returning clear liquid in the recovery part to the circulation clarifier; one end of the return pipeline is communicated with the water inlet pipe of the circulating clarifier, and the other end of the return pipeline is communicated with the liquid outlet of the recovery part.
Preferably, the circulating current regulating device is further included, and the liquid inlet flux and/or the mixed liquid rising flow rate of the circulating current sedimentation zone are/is regulated by the circulating current regulating device.
Preferably, the circulating clarifier is longitudinally arranged, the cross section of the first degassing part is an inverted trapezoid or rectangular containing space, the cross section of the second degassing part is a triangular containing space, an intermediate part is formed between the lower end of the first degassing part and the upper end of the second degassing part, and an upward flow channel is formed in the intermediate part.
Preferably, the water outlet unit comprises a water collecting tank and a water outlet pipe, wherein the water collecting tank is connected to the first degassing part, the water outlet pipe is connected to the bottom of the water collecting tank, the tail end of the water outlet pipe extends to the outside of the circulation clarifier, and after entering the first degassing part, liquid enters the water outlet pipe through the water collecting tank and then is discharged out of the circulation clarifier through the water outlet pipe.
Preferably, an exhaust part is further provided at the upper end of the first degassing part, and the gas is exhausted through the exhaust part.
Preferably, the cross section of the first degassing part is in a vertical line shape, the cross section of the second degassing part is in an inclined line shape, the bottom of the first degassing part is connected with the top of the second degassing part, the bottom of the second degassing part is inclined towards the center of the circulation clarifier, an upward flow channel is formed between the two second degassing parts, and an upward flow inlet is formed between the bottoms of the two second degassing parts.
Preferably, the water outlet unit comprises a water collecting tank and a water outlet pipe, the water collecting tank is arranged between the two first degassing parts, the water outlet pipe is connected with the bottom of the water collecting tank, the tail end of the water outlet pipe extends to the outside of the circulation clarifier, and liquid flows into the water collecting tank after entering the first degassing parts, and is discharged out of the circulation clarifier through the water outlet pipe.
Preferably, the circulating clarifier further comprises a slag discharging pipeline, wherein one end of a slag inlet of the slag discharging pipeline is communicated with the exhaust part of the circulating clarifier, and one end of the slag outlet is communicated with a water inlet pipe of the circulating clarifier.
The application also provides application of the circulating clarifier in an integrated short-cut nitrification-anaerobic ammonia oxidation reactor.
Preferably, at least one circulating clarifier is arranged above the inside of the reactor, and a circulating sedimentation zone is formed at the position of the bottom of the circulating clarifier, which is communicated with the inside of the reactor; and regulating the liquid inlet flux of the circulating sedimentation zone and the rising flow rate of the mixed liquid, so as to separate sludge with different sedimentation performances.
The beneficial effects are that:
the circulation clarifier provided by the application is provided with the degassing unit to form a specific gas-liquid-solid flow channel, so that the disturbance of nitrogen generated in the reactor on activated sludge in the circulation clarifier is reduced, and the effective separation and discharge of gas and the mud-water separation of a sludge mixed solution are realized; meanwhile, in the circulation clarifier, the effective separation of microorganisms in activated sludge with different sludge ages and different forms can be realized by adjusting the circulation flow rate of the mixed solution, and the microorganism proportion of different flora can be regulated and controlled to realize the cooperative work of a plurality of microorganisms. Providing more possibilities for the application of the circulating clarifier in the field of biological denitrification of sewage.
The integrated short-cut nitrification-anaerobic ammonia oxidation reactor provided by the application is provided with the circulation clarifier, so that the problems of increased effluent suspended matters and loss of AnAOB in the reactor, and reduced denitrification efficiency of the reactor caused by a large amount of loss of AnAOB due to the fact that part of AnAOB is discharged along with effluent due to the fact that nitrogen is subjected to an air floatation effect on AnAOB after ammonia nitrogen and nitrite nitrogen are converted into nitrogen by AnAOB are effectively avoided.
The application of the circulating clarifier in the integrated short-cut nitrification-anaerobic ammonia oxidation reactor is beneficial to the formation of anaerobic ammonia oxidation granular sludge and the full mixing of short-cut nitrifying bacteria and anaerobic ammonia oxidation bacteria with ammonia nitrogen in a water body, high-efficiency mass transfer and improvement of the removal rate of total nitrogen in sewage through the arrangement of a circulating structure of the circulating clarifier, namely a circulating sedimentation zone.
Drawings
FIG. 1 is a schematic diagram of the structure of a loop clarifier according to an embodiment of the application in example 1;
FIG. 2 is a schematic diagram of the structure of a loop clarifier according to another embodiment of the application, example 1;
FIG. 3 is a schematic diagram showing the structure of an integrated short-cut nitrification-anaerobic ammonia oxidation reactor according to embodiment 2 of the present application;
FIG. 4 is a schematic diagram of an integrated short-cut nitrification-anaerobic ammonia oxidation reactor according to embodiment 2 of the present application;
FIG. 5 is a schematic diagram of an integrated short-cut nitrification-anaerobic ammonia oxidation reactor according to example 2 of the present application.
The diagram is:
a 100-loop clarifier, a 1001-loop settling zone,
200-reactor, 2001-aeration device, 2002-water inlet pipeline,
10-water outlet unit, 101-water collecting tank, 102-water outlet pipe,
20-degassing unit, 201-first degassing section, 202-second degassing section, 203-intermediate section, 204-degassing section, 205-down flow channel, 206-up flow channel,
30-sludge discharge unit, 301-sludge discharge pipeline, 302-recovery part, 303-return pipeline,
40-deslagging pipeline.
Detailed Description
The application will be described in detail below with reference to the drawings in connection with embodiments. The principles and features of the present application are described below with reference to the drawings, and it should be noted that embodiments of the present application and features of the embodiments may be combined with each other without conflict. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the application.
Example 1
The present embodiment provides a circulation clarifier 100, as shown in fig. 1-2, provided with a water outlet unit 10 and a degassing unit 20, wherein the degassing unit 20 comprises a first degassing part 201 and a second degassing part 202 which are sequentially arranged from top to bottom; the degassing units 20 of the present embodiment are preferably arranged in two groups and are arranged oppositely; the water outlet unit 10 is arranged between the two first degassing parts 201; a downward flow channel 205 is formed between the degassing unit 20 and the inner wall of the circulation clarifier 100, an upward flow channel 206 is formed in the space of the second degassing part 202 toward the water outlet unit 10 side, and the gas is discharged through the first degassing part 201; a loop sedimentation zone 1001 is formed between the lower part of the degassing unit 20 and the bottom of the loop clarifier 100. By adjusting the flux of the mixed liquor entering the loop sedimentation zone 1001 and the rising flow rate, sludge with different sedimentation properties entering the loop sedimentation zone 1001 can be separated, and sludge with poor sedimentation properties, such as flocculent sludge, rises into the degassing unit, flows along the upward flow channel and enters the water collection tank 101 along with the effluent.
In this embodiment, the circulation clarifier 100 further includes a sludge discharging unit 30, the sludge discharging unit 30 includes a sludge discharging pipe 301 and a recovery portion 302, one end of the sludge discharging pipe 301 is connected to the bottom of the water discharging unit 10, and the other end is connected to the recovery portion 302. The sludge discharging unit 30 further comprises a return line 303 for returning the clear liquid in the recovery portion 302 to the circulation clarifier 100, wherein one end of the return line 303 is communicated with a water inlet pipe of the circulation clarifier 100, and the other end is communicated with the upper portion of the recovery portion 302. When the floc sludge level in the water outlet unit 10 rises to a set position, sludge is discharged through the sludge discharge unit 30, the raw water inlet valve and the water outlet valve are closed, the sludge discharge valve is opened, and the sludge collected in the water outlet unit 10 is discharged to the bottom of the recovery part 302 through the sludge discharge pipeline 301.
Wherein, a preferred embodiment is also provided with a slag discharging pipeline 40, one end of a slag inlet of the slag discharging pipeline 40 is communicated with the exhaust part 204 of the circulating clarifier 100, and one end of the slag outlet is communicated with a water inlet pipe of the circulating clarifier 100. A slag discharge pump may be further provided, and one end of the slag outlet of the slag discharge pipe 40 is connected to the slag discharge pump and to the water inlet pipe of the circulation clarifier 100. In order to prevent a large amount of scum from being generated in the second degassing unit 202, the scum of the degassing unit 204 is cut and broken by the slag discharge pump by periodically opening the slag discharge pipe 40, and then the bubbles are released into the water and then returned to the circulation clarifier 100.
Further, the present embodiment further comprises a circulation regulating device, by which the liquid inflow and/or the mixed liquor rising flow rate of the circulation settling zone 1001 is regulated. The circulation regulating means may be a return pump mounted on the return line 303. After the sludge is precipitated in the recovery unit 302, the supernatant is returned to the circulation clarifier 100 through a return pipe 303 by a return pump, and the flocculated sludge in the circulation clarifier 100 is discharged by continuous circulation.
Further, the recovery unit 302 of this embodiment may be provided with a sedimentation zone and a water storage zone, in which the effluent containing flocculent sludge is sedimented, and then the supernatant liquid obtained after the sedimentation of the effluent is introduced into the water storage zone, and then circulated back into the circulation clarifier 100 for increasing the rising flow rate.
In one embodiment, as shown in fig. 1, the first degassing part 201 is arranged longitudinally along the circulation clarifier 100, the cross section of the first degassing part 201 is an inverted trapezoid or rectangular accommodating space, the cross section of the second degassing part 202 is a triangular accommodating space, an intermediate part 203 is formed between the lower end of the first degassing part 201 and the upper end of the second degassing part 202, and an upward flow channel is formed in the intermediate part 203.
Further, the water outlet unit 10 includes a water collecting tank 101 and a water outlet pipe 102, the water collecting tank 101 is connected to the first degassing portion 201, the water outlet pipe 102 is connected to the bottom of the water collecting tank 101, and the end of the water outlet pipe extends to the outside of the circulation clarifier 100, the liquid enters the water collecting tank 101 after entering the first degassing portion 201, and then is discharged out of the circulation clarifier 100 through the water outlet pipe 102, wherein an overflow weir is provided on the water collecting tank 101, and the liquid enters the water collecting tank 101 through the overflow weir.
Further, a gas discharge portion 204 may be provided at the upper end of the first degassing portion 201, and the gas may be discharged through the gas discharge portion 204.
In another embodiment, as shown in fig. 2, the cross section of the first degassing part 201 is in a vertical line shape, the cross section of the second degassing part 202 is in an inclined line shape, the bottom of the first degassing part 201 is connected with the top of the second degassing part 202, the bottom of the second degassing part 202 is inclined towards the center of the circulation clarifier 100, an upward flow channel is formed between the two second degassing parts 202, and an upward flow inlet is formed between the bottoms of the two second degassing parts 202. Wherein, the included angle between the first degassing portion 201 and the second degassing portion 202 is an obtuse angle.
Example 2
This example provides an integrated short-cut nitrification-anaerobic ammonia oxidation reactor 200, as shown in fig. 3-5, at least one loop clarifier 100 provided in example 1 is disposed within the reactor 200. The circulation clarifier 100 is the same as described in example 1, except for the specific description, and will not be described again.
In one embodiment, the reactor 200 comprises a reactor body, the circulating clarifier 100 is arranged above the inside of the reactor body, the upper end of the circulating clarifier 100 is flush with the upper end of the reactor body, the lower end of the circulating clarifier 100 is provided with a reflux sedimentation channel, mixed liquid in the reactor body enters the circulating clarifier 100 through the reflux sedimentation channel, an aeration device 2001 and a water inlet pipeline 2002 are arranged at the bottom of the reactor body, waste water enters the inside of the reactor body from the water inlet pipeline 2002, activated sludge in the reactor body is fully mixed under the aeration effect of the aeration device 2001, the rising channel between the two circulating clarifiers 100 is lifted upwards, the reflux sedimentation channel of the circulating clarifier 100 enters the inside of the circulating clarifier 100, mud-water separation is carried out in a reflux sedimentation zone 1001 of the circulating clarifier 100, flocculent sludge enters the bottom of the water outlet unit 10 from the first degassing part 201, is discharged through the mud discharge unit 30 and flows back into the reactor 200 body, and supernatant liquid is discharged through the first degassing part 201 and is discharged out of the reactor 200 through the water outlet unit 10. Through the setting of the degasification unit, the specific gravity of the downward flowing and separated granular sludge is prevented from being reduced after carrying bubbles and discharged along with effluent, thereby more effectively realizing the separation of sludge mixture, such as the separation of floc sludge and granular sludge.
In the reactor 200 of the present embodiment, the feed liquid flux and/or the mixed liquor rising flow rate of the loop sedimentation zone 1001 is regulated by the loop regulating means. The circulation regulating means may be a return pump mounted on the return line 303. After the flocculent sludge is precipitated in the recovery unit 302, the supernatant is returned to the reactor 200 through a return pump via a return pipe 303 or returned to the reactor body, enters the circulation clarifier 100 through a return precipitation channel of the circulation clarifier 100, and is continuously circulated by increasing the rising flow rate by the return pump, so as to discharge the flocculent sludge in the circulation clarifier 100.
Specifically, two types of bacteria mainly participating in the reaction in the reactor are Ammonia Oxidizing Bacteria (AOB) and anaerobic ammonia oxidizing bacteria (AnAOB, commonly known as rhodobacter sphaeroides). Wherein, AOB generates short-range nitrification to convert ammonia nitrogen into nitrite; anAOB converts ammonia nitrogen and nitrite nitrogen into nitrogen, and plays a role in denitrification. In the reactor, the AOB exists in the form of flocculent sludge, and the AnAOB exists mainly in the form of granular sludge. In this embodiment, the mixed liquor flux and the rising flow rate are adjusted in the loop settling zone such that the AOB rises into the degassing unit and is discharged from the bottom of the first degassing section 201 out of the water unit 10 through the sludge discharge unit 30, thereby separating the AOB. Therefore, the phenomenon that the nitrite nitrogen is accumulated due to relatively rapid growth of the AOB is avoided, so that the AnAOB is inhibited, and finally the whole system is crashed is avoided.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (8)
1. The application of the circulation clarifier in the integrated shortcut nitrification-anaerobic ammonia oxidation reactor is characterized in that the circulation clarifier is arranged above the inside of the integrated shortcut nitrification-anaerobic ammonia oxidation reactor body, a water outlet unit and a degassing unit are arranged in the circulation clarifier, and the degassing unit comprises a first degassing part and a second degassing part which are sequentially arranged from top to bottom; the water outlet unit is arranged at one side of the first degassing part far away from the inner wall of the circulating clarifier; a downward flow channel is formed between the degassing unit and the inner wall of the circulation clarifier, an upward flow channel is formed in a space of the second degassing part towards one side of the water outlet unit, and gas is discharged through the first degassing part;
a circulating sedimentation zone is formed between the lower part of the degassing unit and the bottom of the circulating clarifier;
the system comprises a water outlet unit, a sludge discharge unit, a water inlet unit, a water outlet unit and a water return unit, wherein the sludge discharge unit comprises a sludge discharge pipeline, a recovery part and a return pipeline; the return pipeline is used for returning the supernatant in the recovery part to the circulating clarifier; one end of the return pipeline is communicated with a water inlet pipe of the circulating clarifier, and the other end of the return pipeline is communicated with a liquid outlet of the recovery part;
the circulating current regulating device is arranged on the return pipeline; the liquid inlet flux and the rising flow rate of the mixed liquid in the circulation sedimentation zone are regulated by the circulation regulating device, and the sludge with different sedimentation properties, including flocculent sludge and granular sludge, entering the circulation sedimentation zone is separated;
wherein, flocculent sludge enters the recovery part through a sludge discharge pipeline.
2. Use of a loop clarifier according to claim 1 in an integrated short-cut nitrification-anaerobic ammonia oxidation reactor, characterized in that, along the longitudinal arrangement of the loop clarifier, the cross section of the first degassing portion is an inverted trapezoid or rectangular accommodation space, the cross section of the second degassing portion is a triangular accommodation space, an intermediate portion is formed between the lower end of the first degassing portion and the upper end of the second degassing portion, and the intermediate portion is formed with an upward flow channel.
3. Use of a loop clarifier according to claim 2 in an integrated short-cut nitrification-anaerobic ammonia oxidation reactor, characterized in that the water outlet unit comprises a water collection tank and a water outlet pipe, the water collection tank is connected to the first degassing section, the water outlet pipe is connected to the bottom of the water collection tank, and its end extends to the outside of the loop clarifier, after the liquid enters the first degassing section, the liquid enters the water outlet pipe through the water collection tank, and then exits the loop clarifier through the water outlet pipe.
4. Use of a loop clarifier according to claim 3 in an integrated short-cut nitrification-anaerobic ammonia oxidation reactor, characterized in that the upper end of the first degassing section is further provided with a discharge section through which gas is discharged.
5. Use of a loop clarifier according to claim 1 in an integrated short-cut nitrification-anaerobic ammonia oxidation reactor, characterized in that the cross section of the first degassing section is vertically linear, the cross section of the second degassing section is diagonally linear, the bottom of the first degassing section is connected with the top of the second degassing section, the bottom of the second degassing section is inclined towards the center of the loop clarifier, an upward flow channel is formed between the two second degassing sections, and an upward flow inlet is formed between the bottoms of the two second degassing sections.
6. The use of a loop clarifier according to claim 5 in an integrated short-cut nitrification-anaerobic ammonia oxidation reactor, wherein the water outlet unit comprises a water collecting tank and a water outlet pipe, the water collecting tank is arranged between the two first degassing sections, the water outlet pipe is connected with the bottom of the water collecting tank, and the tail end of the water outlet pipe extends to the outside of the loop clarifier, and liquid flows into the water collecting tank after entering the first degassing section, and is discharged out of the loop clarifier through the water outlet pipe.
7. The use of a loop clarifier according to claim 4 or 6 in an integrated short-cut nitrification-anaerobic ammonia oxidation reactor, further comprising a slag discharge line, wherein a slag inlet end of the slag discharge line is in communication with an exhaust portion of the loop clarifier, and a slag outlet end is in communication with a water inlet pipe of the loop clarifier.
8. Use of a loop clarifier according to claim 1 in an integrated short-cut nitrification-anaerobic ammonia oxidation reactor, characterized in that at least one of the loop clarifiers is arranged above within the integrated short-cut nitrification-anaerobic ammonia oxidation reactor.
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| CN108911124A (en) * | 2018-07-18 | 2018-11-30 | 杭州师范大学 | With the integral type self-supported denitrification reactor from retention anaerobic ammonium oxidizing bacteria function |
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| CN218620501U (en) * | 2022-08-25 | 2023-03-14 | 北京师范大学 | Continuous flow phycomycete granular sludge photobioreactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107265639A (en) * | 2017-07-01 | 2017-10-20 | 清华大学 | A kind of integral split-phase combined type denitrogenation of waste water device and a kind of method of denitrogenation of waste water |
| CN108911124A (en) * | 2018-07-18 | 2018-11-30 | 杭州师范大学 | With the integral type self-supported denitrification reactor from retention anaerobic ammonium oxidizing bacteria function |
| CN114906932A (en) * | 2022-04-29 | 2022-08-16 | 清研环境科技股份有限公司 | Carbon and nitrogen removal device and treatment method for high ammonia nitrogen organic wastewater |
| CN218620501U (en) * | 2022-08-25 | 2023-03-14 | 北京师范大学 | Continuous flow phycomycete granular sludge photobioreactor |
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