CN111392874A - High ammonia nitrogen autotrophic nitrogen removal device - Google Patents
High ammonia nitrogen autotrophic nitrogen removal device Download PDFInfo
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- CN111392874A CN111392874A CN201910866766.0A CN201910866766A CN111392874A CN 111392874 A CN111392874 A CN 111392874A CN 201910866766 A CN201910866766 A CN 201910866766A CN 111392874 A CN111392874 A CN 111392874A
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- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
The invention discloses a high ammonia nitrogen autotrophic nitrogen removal device, which comprises a reactor body, wherein the reactor body comprises a reaction zone, a precipitation zone and a gas outlet zone from bottom to top: the reaction zone comprises a plurality of semi-open guide plates and an aeration chamber formed by separating partition plates, the fixed ends of the guide plates and the partition plates are oppositely arranged on the inner wall of the reactor body, the guide plates and the partition plates are arranged at intervals, an aeration pipe is arranged in the aeration chamber on one side of the partition plates, and a water inlet for water inlet is formed in the bottom of the reaction zone; a three-phase separator is arranged between the sedimentation area and the air outlet area, the three-phase separator is two mud guards inclining downwards, and a gap between the two mud guards and a gap between the mud guards and the reactor body form an overflowing channel; the air outlet area is provided with a water outlet for water outlet. The invention realizes adaptive oxygen supply through DO sectional regulation, provides adaptive conditions for different functional bacteria, can effectively reduce the biomass loss of the system, increases the biomass of the system and improves the denitrification performance of the system.
Description
Technical Field
The invention relates to the technical field of biological treatment of nitrogenous wastewater, and particularly relates to a high ammonia nitrogen autotrophic nitrogen removal device.
Background
The traditional biological denitrification process often limits denitrification performance due to lack of carbon source when treating high-ammonia nitrogen low-C/N wastewater, and needs to additionally add organic matters, thereby improving operation cost, easily causing secondary pollution risk, and being not beneficial to the safe and economic operation of a system. The novel denitrification process technology which combines the advantages of the shortcut nitrification process and the anaerobic ammonium oxidation process can realize the shortcut nitrification process and the anaerobic ammonium oxidation process in the same reactor. Part of ammonia nitrogen is converted into nitrite nitrogen by utilizing AOB, and then the nitrite nitrogen is cooperated with the action of anaerobic ammonia oxidation (Anammox) bacteria, and the ammonia nitrogen in water is taken as an electron donor, and the nitrite is taken as an electron acceptor to directly generate nitrogen, thereby realizing the purpose of green denitrification. Compared with the traditional nitrification-denitrification process, the completely autotrophic denitrification process has the advantages of high denitrification potential and low operation cost, and has important application prospect for treating the high ammonia nitrogen wastewater.
In the running process of the whole-process autotrophic nitrogen removal process, the DO concentration in the wastewater is difficult to realize dynamic matching with the change of the ammonia nitrogen concentration, and the problems of long starting period, disordered flora structure, unstable running and the like exist. During continuous flow operation, the functional flora in the reaction device often tends to wash out of the reactor, which further exacerbates the above-mentioned problems.
Chinese patent publication No. CN107188307A, entitled an integrated wastewater denitrification device and a wastewater denitrification method, discloses an integrated wastewater denitrification device and a wastewater denitrification method. The device provided by the invention has simple structure and good stability and recovery. According to the invention, nitrobacteria and low-activity flocculent anaerobic ammonia oxidation sludge are adopted as a reactor main body, and the growth and activity of the nitrobacteria are selectively inhibited and the activity of ammonia oxidizing bacteria and anaerobic ammonia oxidizing bacteria is promoted by intermittently adding hydroxylamine and/or hydrazine with a certain concentration for a long time; the reactor adopts the running mode of a sequencing batch reactor, and realizes the dilution of the inflow water containing high-concentration ammonia nitrogen by adjusting the drainage ratio, so that the concentration of a substrate in the reactor is in a proper range, the inhibition on shortcut nitrification and anaerobic ammonia oxidation is not caused, the accumulation phenomenon of nitrate is improved, and the denitrification effect of the reactor is quickly recovered. However, the device belongs to a batch operation mode and cannot realize continuous water inlet; in order to improve the system operation performance, a metabolic intermediate product hydroxylamine and/or hydrazine needs to be added, so that the cost is not saved; the sludge settling time is prolonged and the sludge is easily washed out when the performance of the sludge settling is reduced due to the performance inhibition of the batch operation.
Disclosure of Invention
In view of the above, the invention overcomes the defects that the existing batch operation mode can not continuously feed water, the sedimentation time is prolonged when the sludge sedimentation performance is reduced due to performance inhibition, the sludge is easy to wash out and the like, and provides the high ammonia nitrogen autotrophic nitrogen removal device which can effectively retain the sludge without additionally adding metabolic intermediate products.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a high ammonia nitrogen autotrophic denitrification device, includes the reactor body, the reactor body includes reaction zone, settling zone and play gas zone by lower to last in proper order:
the reaction zone comprises a plurality of semi-open guide plates and an aeration chamber formed by separating partition plates, the fixed ends of the guide plates and the partition plates are oppositely arranged on the inner wall of the reactor body, the guide plates and the partition plates are arranged at intervals, an aeration pipe is arranged in the aeration chamber on one side of the partition plates, and a water inlet for water inlet is formed in the bottom of the reaction zone;
a three-phase separator is arranged between the sedimentation area and the air outlet area, the three-phase separator is two mud guards inclining downwards, and a gap between the two mud guards and a gap between the mud guards and the reactor body form an overflowing channel;
the air outlet area is provided with a water outlet for water outlet.
The sewage to be treated enters from a water inlet at the bottom and is subjected to microbial treatment through a plurality of aeration chambers formed by the partition plates and the guide plates. The guide plate and the partition plate are arranged at intervals, and the guide plate, the partition plate and the guide plate are arranged at intervals. The stiff end of guide plate is connected in the left side of reactor body, and the stiff end of baffle is connected on the right side of reactor body, and the radius of the two length ratio reactor body is big. The adjacent guide plates and the partition plates form an aeration chamber. Due to the arrangement of the partition plates and the guide plates, the sewage is required to rise in an S shape and pass through the aeration chamber as much as possible. The aeration rate of the aeration pipe on one side of the clapboard is reduced from bottom to top in sequence, so that a high aeration chamber, a middle aeration chamber and a low aeration chamber are formed. An aeration pipe is not arranged in the aeration chamber on one side of the guide plate to form a non-aeration chamber, the oxygen content in the non-aeration chamber is low, and the anaerobic ammonia oxidation (Anammox) bacteria breeding work is adapted. The water flow sequentially passes through the high aeration chamber, the non-aeration chamber, the middle aeration chamber, the non-aeration chamber and the low aeration chamber, and the arrangement with gradient has the advantages compared with the arrangement with two stages: after ammonia nitrogen in water is converted into nitrite nitrogen, the nitrite nitrogen can be timely converted into nitrogen to be discharged, instead of being continuously present in sewage, so that the accumulation of nitrite nitrogen is avoided to inhibit the microbial activity of a system; so that the liquid is rapidly switched between high oxygen content and low oxygen content, nitrite oxidizing bacteria in a nitrate nitrogen form are converted by elution, and the bacteria are similar to ammonia oxidizing bacteria in ecological niches. The number of such bacteria is reduced and destroyed by several passes through the low oxygen non-aerated zone. The sewage flowing out of the reaction area rises to the sedimentation area, the volume in the reaction area is far larger than the flow cross section area separated by the partition plate and the guide plate in the reaction area, the water flow speed is gentle, and the sludge sedimentation is facilitated. The top of the settling zone is a three-phase separator, and the mud guards of the three-phase separator are combined to leave only fine holes at the left side, the right side and the middle part for exhausting and draining.
Preferably, the reactor body is communicated with a liquid storage tank through a water inlet, the liquid storage tank is arranged on an elastic platform, and the elastic platform comprises an elastic part and a platform plate connected to the movable end of the elastic part.
The technical scheme is to solve the problem that the water inlet is arranged at the bottom, or the liquid level of the liquid storage tank is higher than that of the reactor body, or the liquid is pumped by a pump. However, both of these two methods have inconvenience, the flow rate of the former can change along with the reduction of the liquid level difference, the device adopts biological denitrification, the input materials and energy are reduced as much as possible for environmental protection, and in order to reach the maximum water treatment capacity of the equipment as much as possible, a pump body with high precision is needed, and the precision required by the pump body capable of pumping the required flow rate is too high, so that the device is not suitable for popularization. The liquid storage pot sets up on elastic platform, and when the liquid volume in the liquid storage pot was great, weight was big, oppresses elastic platform, makes it descend, and the water pressure of water inlet department diminishes, and the velocity of flow is slower, and the sewage volume of bringing into is less, and in sewage progressively flowed into the reactor body, liquid storage pot weight reduced rises gradually under elastic platform's effect, and its liquid level height maintains, and the liquid level difference change is less, and the velocity of flow change is slow. The design is simple, efficient and environment-friendly.
Preferably, the fixed end of the elastic part is fixedly connected to the lifting plate, the lifting plate is in threaded connection with a threaded rod, and the end of the threaded rod is provided with an adjusting handle.
For liquid storage tanks and reactor bodies with different sizes, in order to keep the liquid level difference, an adjustable lifting device is arranged to ensure that the liquid storage tanks and the reactor bodies with different volumes can be adapted, and the adaptability is improved.
Preferably, an air outlet is arranged in the aeration chamber. Redundant gas led into the corresponding aeration pipe can be led out from the gas outlet, so that the gas is prevented from being accumulated under the partition plate and the guide plate and dissolved in liquid.
Preferably, the reactor body is provided with an overflow weir at the water outlet, and the overflow weir is surrounded by a flanging which is arranged on the inner wall of the reactor and overturns towards the center direction of the reactor.
The weir adjusts the hydraulic flow pattern of the effluent, dissipates energy, and to some extent prevents sludge effluent from first accumulating in the weir and then flowing out of the weir through the discharge opening.
Preferably, the reactor body is inclined in the settling zone at an angle of between 120 ° and 175 °.
The side wall of the reactor body is inclined in the settling zone, on which settled sludge will settle.
Preferably, the overflowing channel is provided with an overflowing plate, the overflowing plate is provided with a small hole, and the diameter of the small hole is 5-10 mm. The structure realizes that the overflowing plate further improves the effect of separating the produced sludge.
Preferably, the volume ratio of the reaction zone to the precipitation zone to the gas outlet zone is 5-10: 2-4: 1. The sedimentation zone in the structure is the largest, and the water flow velocity is the slowest, which is most beneficial to sedimentation.
Preferably, the bottom of the reaction zone is provided with a sludge discharge hole. The sludge discharge hole discharges partial sludge produced in the reaction area, and the sludge is prevented from being accumulated in the reactor body in a large amount.
Preferably, the platform plate is provided with a plurality of lifting guide holes near the outer edge, the lifting plate is provided with corresponding lifting guide rods, and the lifting guide rods are inserted into the corresponding lifting guide holes one by one. The lifting guide holes and the lifting guide rods are matched to prevent the platform plate from deflecting relative to the bottom.
Compared with the prior art, the invention has the beneficial effects that: (1) adaptive oxygen supply is realized through DO (dissolved oxygen) segmented regulation, adaptive conditions are provided for different functional bacteria, and the denitrification performance of the system is improved; (2) the biomass loss of the system can be effectively reduced, the biomass of the system is increased, and higher flora activity is maintained; (3) the liquid storage tank is arranged on the elastic platform, so that the liquid level difference can be dynamically adjusted, the water outlet rate and the water pressure of the water inlet can be adjusted, and the denitrification performance of the system can be kept stable and efficient.
Drawings
FIG. 1 is a schematic view of a reactor body of the present invention;
FIG. 2 is a schematic view of the fluid reservoir and its flexible platform of the present invention;
in the figure:
the device comprises a reaction device body 1, a water inlet 2, a reaction area 3, a high aeration area 31, a middle aeration area 32, a low aeration area 33, a non-aeration area 34, a settling area 4, an air outlet area 5, an overflowing channel 6, a sludge discharge hole 10, an overflow weir 11, a water outlet 12, a three-phase separator 13, a guide plate 71, a partition plate 72, an air outlet 81, an aeration pipe 9, a liquid storage tank 10, an elastic piece 101, a platform plate 102, a lifting plate 103, a threaded rod 104 and a lifting guide rod 105.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example (b):
the utility model provides a high ammonia nitrogen autotrophic denitrification device, as shown in figure 1, includes reaction unit body 1, and reaction unit body 1 includes reaction zone 3, settling zone 4 and play gas zone 5 by lower to last in proper order: the reaction zone comprises a plurality of semi-open guide plates and an aeration chamber formed by separating partition plates, the fixed ends of the guide plates and the partition plates are oppositely arranged on the inner wall of the reaction device body 1, the guide plates 71 and the partition plates 72 are arranged at intervals, the aeration chamber on one side of the partition plates is provided with an aeration pipe 9, and the bottom of the reaction zone is provided with a water inlet 2 for water inlet; a three-phase separator 13 is arranged between the settling zone 4 and the air outlet zone 5, the three-phase separator 13 is two mudguards which incline downwards, and a gap between the two mudguards and a gap between the mudguards and the reaction device body 1 form an overflowing channel 6; the air outlet area 5 is provided with a water outlet 12 for water outlet.
The sewage to be treated enters from the water inlet 2 at the bottom and flows out from the water outlet 12 at the top. The microorganism treatment is carried out in a plurality of aeration chambers formed by the baffle plates and the guide plates. The guide plate and the partition plate are arranged at intervals, and the guide plate, the partition plate and the guide plate are arranged at intervals. The stiff end of guide plate is connected in the left side of reaction unit body 1, and the stiff end of baffle is connected in the right side of reaction unit body 1, and both length are all bigger than the radius of reaction unit body 1. The adjacent guide plates and the partition plates form an aeration chamber. Due to the arrangement of the partition plates and the guide plates, the sewage is required to rise in an S shape and pass through the aeration chamber as much as possible. The aeration pipe 9 on the side of the partition plate is sequentially decreased in aeration rate from bottom to top, thereby forming a high aeration zone 31, a middle aeration zone 32 and a low aeration zone 33. An aeration pipe is not arranged in the aeration chamber at one side of the guide plate to form a non-aeration area 34, and the oxygen content in the non-aeration area is low, so that the anaerobic ammonia oxidation (Anammox) bacteria breeding work is adapted. The gradient arrangement of water passing through the high aeration zone 31, the non-aeration zone 34, the medium aeration zone 32, the non-aeration zone 34, and the low aeration zone 33 has the advantage over dividing it into two stages: after ammonia nitrogen in water is converted into nitrite nitrogen, the nitrite nitrogen can be timely converted into nitrogen to be discharged, but the nitrite nitrogen does not continuously exist in sewage to inhibit microbial activity; so that the liquid is rapidly switched between high oxygen content and low oxygen content, nitrite oxidizing bacteria which convert nitrite nitrogen into nitrate nitrogen form are eluted, and the bacteria have similar ecological niches with ammonia oxidizing bacteria. The number of such bacteria is reduced and destroyed by several passes through the low oxygen non-aerated zone. The sewage flowing out of the reaction zone rises to the sedimentation zone 4, the volume in the reaction zone 3 is far larger than the flow cross section area separated by the baffle plate and the guide plate in the reaction zone 3, the water flow speed is gentle, and flocculent organic matters produced by the previous bacterial reaction can be precipitated at the flow cross section area. At the top of the settling zone 4 is a three-phase separator 13, and the mud guards of the three-phase separator 13 are combined to form a flow passage which only reserves the left side, the right side and the middle part and is used for exhausting and draining.
As shown in fig. 2, the reaction device body 1 is communicated with a liquid storage tank 10 through a water inlet, the liquid storage tank 10 is arranged on an elastic platform, and the elastic platform comprises an elastic member 101 and a platform plate 102 connected to the movable end of the elastic member 101.
The reactor is arranged on the elastic platform for environmental protection, so that the input materials and energy are reduced as much as possible, and the mode is preferably adopted when the biological reaction speed is relatively slow or the system operation load is not high in the starting stage. The liquid storage tank 10 is arranged on the elastic platform, when the amount of liquid in the liquid storage tank 10 is larger, the weight is large, the elastic platform is pressed to enable the elastic platform to descend, the water pressure at the water inlet 2 is reduced, the flow rate is kept close, the amount of sewage brought in is still close, when the sewage flows into the reaction device body 1 gradually, the weight of the liquid storage tank 10 is reduced, the liquid level is gradually raised under the action of the elastic platform, the liquid level height is kept, the liquid level difference change is smaller, and the flow rate change is slow. The design is simple, efficient and environment-friendly.
The fixed end of elastic component 101 is fixed connection on lifter plate 103, and lifter plate 103 threaded connection has threaded rod 104, and threaded rod 104 tip is equipped with the regulation handle.
For the liquid storage tanks 10 and the reaction device body 1 with different sizes, in order to keep the liquid level difference, the adjustable lifting device is arranged to ensure that the liquid storage tanks 10 with different volumes can be matched with the reaction device body 1, and the adaptability is improved.
Preferably, an air outlet 81 is provided in the aeration chamber. The gas introduced into the aeration pipe 9 is led out from the gas outlet 81, so that the gas is prevented from being accumulated under the partition plate and the guide plate and dissolved in the liquid. The reaction device body 1 is provided with an overflow weir 11 at the water outlet 12, and the overflow weir 11 is surrounded by a turned-over edge which is arranged on the inner wall of the reactor and turns towards the center direction of the reactor. Meanwhile, nitrogen generated by the reaction also exits through the gas outlet 81. The gas outlet is provided with a semipermeable membrane for separating gas and liquid or other valve bodies for separating gas and liquid.
The weir 11 adjusts the hydraulic flow pattern of the outflow water, and the water is first accumulated in the weir 11 and then flows out of the weir 11 through the water outlet 12. The reactor body 1 is inclined at an angle of 120 to 175 degrees in the settling zone 4.
The side wall of the reactor body 1 on which the settled sludge is settled is inclined at the settling zone 4. The flow passage 6 is provided with a flow plate, the flow plate is provided with a small hole, and the diameter of the small hole is 5-10 mm. The structure realizes that the overflowing plate further improves the effect of separating the produced sludge.
Preferably, the volume ratio of the reaction zone to the precipitation zone 4 to the gas outlet zone 5 is 5-10: 2-4: 1. The sedimentation zone 4 in the structure is the largest and the water flow rate is the slowest, which is most beneficial for sedimentation. The bottom of the reaction zone is provided with a sludge discharge hole 10. The sludge discharge hole 10 discharges part of the sludge produced in the reaction zone, and prevents the sludge from being accumulated in the reaction device body 1 in a large amount. The platform plate 102 is provided with a plurality of lifting guide holes near the outer edge, the lifting plate 103 is provided with corresponding lifting guide rods 105, and the lifting guide rods 105 are inserted into the corresponding lifting guide holes one by one. The lift guide holes and lift guide rods 105 cooperate to prevent the platen plate 102 from deflecting relative to the bottom.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (10)
1. The utility model provides a high ammonia nitrogen autotrophic denitrification device, includes the reactor body, characterized by, the reactor body includes reaction zone, settling zone and play gas zone by lower to last in proper order:
the reaction zone comprises a plurality of semi-open guide plates and an aeration chamber formed by separating partition plates, the fixed ends of the guide plates and the partition plates are oppositely arranged on the inner wall of the reactor body, the guide plates and the partition plates are arranged at intervals, an aeration pipe is arranged in the aeration chamber on one side of the partition plates, and a water inlet for water inlet is formed in the bottom of the reaction zone;
a three-phase separator is arranged between the sedimentation area and the air outlet area, the three-phase separator is two mud guards inclining downwards, and a gap between the two mud guards and a gap between the mud guards and the reactor body form an overflowing channel;
the air outlet area is provided with a water outlet for water outlet.
2. The device of claim 1, wherein the reactor body is connected to a liquid storage tank via a water inlet, the liquid storage tank is disposed on an elastic platform, and the elastic platform comprises an elastic member and a platform plate connected to a movable end of the elastic member.
3. The high ammonia nitrogen autotrophic nitrogen removal device according to claim 2, wherein the fixed end of the elastic member is fixedly connected to the lifting plate, the lifting plate is in threaded connection with a threaded rod, and the end of the threaded rod is provided with an adjusting handle.
4. The apparatus according to claim 1, wherein the aeration chamber is provided with an air outlet.
5. The device as claimed in claim 1, wherein the reactor body is provided with an overflow weir at the water outlet, the overflow weir is formed by a turned-over edge which is provided on the inner wall of the reactor and turned over toward the center of the reactor.
6. The apparatus according to any one of claims 1 to 5, wherein the reactor body is inclined at an angle of 120 ° to 175 ° in the sedimentation zone.
7. The device of claim 1, wherein the flow channel is provided with a flow plate, the flow plate is provided with an aperture, and the aperture has a diameter of 5 to 10 mm.
8. The high ammonia nitrogen autotrophic nitrogen removal device according to claim 7, wherein the volume ratio of the reaction zone, the precipitation zone and the gas outlet zone is 5-10: 2-4: 1.
9. The high ammonia nitrogen autotrophic nitrogen removal device according to claim 1, wherein a sludge discharge hole is formed at the bottom of the reaction zone.
10. The device according to claim 3, wherein the platform plate has a plurality of elevating guide holes near the outer edge, and the elevating plate has corresponding elevating guide rods inserted into the elevating guide holes.
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| CN87206843U (en) * | 1987-04-25 | 1988-04-06 | 张克俭 | Micro flow and folw-steady faucet unit |
| CN101054234A (en) * | 2007-04-28 | 2007-10-17 | 河北科技大学 | Upflow type anaerobic reactor |
| CN201358188Y (en) * | 2009-01-04 | 2009-12-09 | 上海大学 | Sewage treatment device with integrated fluidized beds and fixed beds |
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