CN109354187B - Device for purifying and separating anaerobic ammonium oxidizing bacteria and application thereof - Google Patents
Device for purifying and separating anaerobic ammonium oxidizing bacteria and application thereof Download PDFInfo
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- CN109354187B CN109354187B CN201811418168.9A CN201811418168A CN109354187B CN 109354187 B CN109354187 B CN 109354187B CN 201811418168 A CN201811418168 A CN 201811418168A CN 109354187 B CN109354187 B CN 109354187B
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
Abstract
The invention relates to a device for purifying and separating anaerobic ammonium oxidizing bacteria and application thereof, wherein the device comprises a cleaning device main body, a bacteria collecting hopper, a water inlet pipe, a main air branch pipe, an air valve, a secondary air branch pipe, a perforated aeration pipe, a bacteria pumping pipe, a blower and a drain pipe; the using method of the device comprises the steps of carrying out strong aeration on materials by utilizing the perforated aeration pipe, increasing collision friction among strains under the shearing action of strong gas generated by the aeration, so that the separation of mixed bacteria, organic matters and inorganic matters attached to the strains and the screening of anaerobic ammonium oxidation bacteria with large particle sizes are realized, the air flow rate of the perforated aeration pipe is reduced, the materials are swirled, the strains can be settled in the strain collecting hopper, and the strains are pumped back to the main reaction area in the strain collecting hopper through the strain suction equipment. Compared with the prior art, the invention effectively improves the reaction mass transfer efficiency, the system stability and the system denitrification load.
Description
Technical Field
The invention relates to a strain purification and separation device in a sewage treatment process, in particular to a device for purifying and separating anaerobic ammonium oxidizing bacteria and application thereof, belonging to the field of biological sewage treatment.
Background
Nitrogen pollution is one of the most important factors causing water body pollution. Excessive nitrogen entering water can cause deterioration of water quality and pose potential threats to human survival and development. The traditional biological denitrification method is completed by two processes of autotrophic bacteria nitrification and heterotrophic bacteria denitrification. Aerobic nitrification takes molecular oxygen as an electron acceptor, and autotrophic nitrifying bacteria convert ammonia nitrogen into nitrate nitrogen. In the anoxic denitrification stage, a carbon source is required to be used as an electron donor, usually, the carbon source of the sewage is insufficient, and a carbon source such as methanol, ethanol, acetic acid, glucose and the like is required to be added, and then nitrate nitrogen is reduced into nitrogen by the same denitrifying bacteria. Since the nitrification and denitrification reactions are performed by different microorganisms under different conditions and the optimal conditions required for the growth of the two types of flora are different, the two processes must be performed separately in different time periods or in different reactors. The denitrification method has the problems of long flow, high oxygen consumption, insufficient denitrification carbon source, obvious pH fluctuation and the like when treating digestive juice.
Compared with the traditional biological denitrification process, the anaerobic ammonium oxidation process does not need an additional organic carbon source for denitrification, does not need oxygen at all, and greatly saves the operating cost. However, the popularization and application of the process have a plurality of technical difficulties. The anaerobic ammonia oxidation process has high requirements on the relative proportion of each nitrogen-containing compound in the inlet water, and in order to ensure the removal rate of total nitrogen, part of nitrosation process needs to be realized and the nitrosation process needs to be kept stable; the anaerobic ammonium oxidation bacteria have long generation time (the generation time is 10 times longer than that of Ammonia Oxidation Bacteria (AOB)), long starting time and slow growth, and are not easy to recover after the system is damaged; in a single anaerobic ammonium oxidation (Anammox) reactor, heterotrophic bacteria multiply in mass when a large external carbon source is present, adversely affecting the stable operation of anaerobic ammonium oxidation. Therefore, the large-scale application of the anaerobic ammonium oxidation process has certain difficulty.
Anaerobic ammonium oxidation reactors reported at present are mostly derived from anaerobic reactors such as traditional activated sludge type reactors, biofilm type reactors and the like. The use of such reactors presents several major problems: (1) the anaerobic ammonium oxidizing bacteria have long generation time and slow growth, and the sludge loss phenomenon in the existing reaction device is serious, so that the starting time is too long, and the load is lower; (2) aiming at the treatment of high organic matter high ammonia nitrogen wastewater, organic matters (such as organic acid or other organic matters) in the wastewater can promote the rapid growth of heterotrophic bacteria such as heterotrophic bacteria and the like and cause the heterotrophic bacteria to be attached to the surfaces of anaerobic ammonium oxidation bacteria, in addition, inorganic components (such as calcium carbonate or struvite and the like) in the wastewater can also be attached to the surfaces of anaerobic ammonium oxidation bacteria particles, so that the normal activities of the anaerobic ammonium oxidation bacteria and the mass transfer efficiency of materials are seriously influenced, wherein the nitrogen conversion rate of the anaerobic ammonium oxidation bacteria particles which are not attached is 4-6 times (mg H/g TS) that are attached, and the direct treatment of the high ammonia nitrogen wastewater is not facilitated; (3) in order to keep the concentration of anaerobic ammonium oxidation strains in the reaction device, the prior art mostly adopts an undifferentiated sludge reflux mode, and the problem of mixed bacteria pollution cannot be solved.
The slow growing anaerobic ammonium oxidizing bacteria have a special property that many individual bacteria form spherical aggregates, so called anaerobic ammonium oxidizing bacteria particles. These anaerobic ammonium oxidizing bacteria particles have a very high density (1010 bacteria/ml), with significant differences from other bacteria in the flocculent form. Aiming at the characteristics of the anaerobic ammonium oxidation bacteria particles and the defects of the anaerobic ammonium oxidation reactor adopted at present, the invention improves the following steps that a cleaning device with staged aeration is arranged to clean and purify the precipitated activated sludge, separate and discharge the mixed bacteria and the inorganic substances coated outside, and improve the reaction mass transfer efficiency and the system stability.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a device for purifying and separating anaerobic ammonium oxidizing bacteria and application thereof.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a purify device of separation anaerobism ammonium oxidation fungus, the device uses with the reaction tank cooperation for handle the activated sludge in the aeration tank or the anaerobism ammonium oxidation reaction tank of not establishing the aeration, take place in the aeration tank and utilize AOB to accomplish the reaction that ammonia nitrogen turns into nitrite nitrogen, take place in the reaction tank of not establishing the aeration and utilize anaerobism ammonium oxidation fungus to accomplish the reaction that ammonia nitrogen and nitrite nitrogen turn into nitrogen gas.
The device comprises a cleaning device main body, a bacteria collecting hopper, a strain circulating system and an aeration system;
the bacteria collecting hopper is of a structure with a large upper part and a small lower part, and an opening at the upper part of the bacteria collecting hopper is connected with the cleaning device main body;
the strain circulating system comprises a water inlet pipe, a water outlet pipe and a strain pumping pipe, one end of the water inlet pipe is connected with the cleaning device main body, the other end of the water inlet pipe extends into the reaction tank, and a strain cleaning pump is arranged on the water inlet pipe; one end of the bacteria pumping pipe is arranged at the bacteria collecting hopper, the other end of the bacteria pumping pipe extends into the reaction tank, and a strain reflux pump is arranged on the bacteria pumping pipe; the drain pipe is connected with the cleaning device main body;
the aeration system comprises an air blower, a main air branch pipe, secondary air branch pipes and perforated aeration pipes, wherein the air blower is connected with one end of the main air branch pipe, the main air branch pipe is provided with a plurality of secondary air branch pipes, each secondary air branch pipe is provided with an air valve and communicated with the perforated aeration pipes, and all the perforated aeration pipes are arranged on the same side surface of the cleaning device body or the bacteria collecting hopper. The fan provides high-pressure air or nitrogen required by aeration.
The perforated aeration pipes are vertically connected with the secondary air branch pipes, and each perforated aeration pipe is distributed in parallel.
The cleaning device main body is of a rectangular tubular structure, the bacteria collecting hopper is of a hopper-shaped structure consisting of four inclined planes, and the perforated aeration pipes are fully distributed on the vertical plane of the cleaning device main body and the inclined planes of the bacteria collecting hopper.
The diameter of the upper hole of the perforated aeration pipe is 2.5-6 mm, and the aeration intensity is 3-5 m3Air/(m)2•h）。
One end of the water inlet pipe extending into the nitrogen-containing wastewater is provided with a screen.
The air blower adopts a variable frequency fan, and the air valve is a manual and starting dual-purpose air valve.
The perforated aeration pipe and the water inlet pipe are arranged on the same side of the device for purifying and separating anaerobic ammonium oxidizing bacteria; the direction of the water discharge pipe is vertical to the direction of the water inlet pipe.
The side face of the bacteria collecting hopper is inclined at an angle of 120-150 degrees.
The invention also provides an application method of the device for purifying and separating anaerobic ammonium oxidizing bacteria, which comprises the following steps:
1) opening a strain cleaning pump to convey the nitrogen-containing wastewater to the device for purifying and separating anaerobic ammonium oxidation bacteria, opening air valves on all secondary air branch pipes, and introducing air into the device for purifying and separating anaerobic ammonium oxidation bacteria through perforated aeration pipes; at this stage, all the perforated aeration pipes are opened, a large amount of air is conveyed into the device, and the strong gas shearing action is generated by aeration, so that the collision friction among strains is increased, the stripping of the mixed bacteria, organic matters and inorganic matters attached to the strains is strengthened, and the separation and purification of the strains are realized.
2) Closing part of perforated aeration pipes positioned at the lower part, keeping the perforated aeration pipes at the upper part open, then opening a strain reflux pump, and returning the purified strains to the reaction tank through a strain pumping pipe; the aeration pipe is only arranged on one side of the tank wall and is opened, rotational flow can be formed in the stage, the number of the aeration pipes is reduced, the rotational flow speed of strain particles is reduced, the rotational flow radius is increased, finally, strains can be settled in the collecting hopper, and the strains are pumped back to the main reaction area in the collecting hopper through the strain sucking equipment.
And (2) in the step (1), the duration of introducing air into the perforated aeration pipe is 5-15 min.
And (3) the opening number of the upper perforated aeration pipes in the step (2) accounts for 30-50% of the total number of the perforated aeration pipes.
The final separation effect is influenced by the process parameters, the larger the aeration intensity is, the larger the generated vorticity is, and the larger the vorticity is to remove the anaerobic ammonium oxidation sludge particles, so that the anaerobic ammonium oxidation sludge particles and surface organic matters, mixed bacteria and inorganic coatings thereof can obtain good separation effect, but when the intensity is too high, the generated vortex is too strong, and the granular sludge is broken. The invention realizes the separation of anaerobic ammonium oxidation sludge particles from organic matters, mixed bacteria and inorganic coating on the surfaces of the anaerobic ammonium oxidation sludge particles by controlling the aeration intensity and setting staged aeration, thereby avoiding the scattering of the granular sludge and avoiding the activity reduction of the granular sludge and the loss of strains.
The invention is connected with a pipeline of a reaction tank, and the activated sludge precipitated in the reaction tank is sent to a staged aeration cleaning device for strain separation by a strain cleaning pump at intervals, wherein the strains cleaned and purified in a strain collecting hopper in the staged aeration cleaning device flow back to an aeration tank or other anaerobic ammonium oxidation main reaction areas by a strain reflux pump and a strain reflux pipeline.
Compared with the prior art, the invention has the following advantages:
1) the screen is arranged at the opening of the drainage device of the main reaction area, so that strain loss is reduced, the start of the reactor is accelerated, and the effective improvement of the load of the reactor is ensured.
2) The cleaning device with staged aeration is arranged to clean and purify the precipitated activated sludge, separate and discharge the mixed bacteria attached to the surfaces of anaerobic ammonium oxidation bacteria particles and the organic and inorganic substances coated outside, and improve the reaction mass transfer efficiency, the system stability and the denitrification load of the whole system.
Drawings
FIG. 1 is a schematic structural view of the present invention installed in cooperation with a reaction tank;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic top view of the present invention;
in the figure, 1 is a screen, 2 is a reaction tank, 3 is nitrogen-containing wastewater to be treated, 4 is a strain cleaning pump, 5 is a strain cleaning water inlet pipeline, 6 is a cleaning device for staged aeration, 7 is a strain reflux pump, 8 is a strain reflux pipeline, 6-1 is a cleaning device main body, 6-2 is a strain collecting hopper, 6-3 is a water inlet pipe, 6-4 is a main air branch pipe, 6-5 is an air valve, 6-6 is a secondary air branch pipe, 6-7 is a perforated aeration pipe, 6-8 is a bacterium pumping pipe, 6-9 is an air blower, and 6-10 is a water drain pipe.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
The utility model provides a purify device of separation anaerobism ammonium oxidation fungus, the device uses with reaction tank 2 cooperation, as shown in figure 1 for handle the activated sludge in aeration tank or the anaerobism ammonium oxidation reaction tank of not setting up the aeration, take place in the aeration tank and utilize AOB to accomplish the reaction that ammonia nitrogen converts nitrite nitrogen, take place in the reaction tank of not setting up the aeration and utilize anaerobism ammonium oxidation fungus to accomplish the reaction that ammonia nitrogen and nitrite nitrogen convert nitrite nitrogen and turn into nitrogen. When in use, the activated sludge precipitated in the reaction tank is sent to a staged aeration device for purifying and separating anaerobic ammonium oxidation bacteria through a bacteria cleaning pump 4 at intervals for bacteria separation, wherein the cleaned and purified bacteria in a bacteria collecting hopper 6-2 in the device for purifying and separating anaerobic ammonium oxidation bacteria flow back to a main reaction area of the reaction tank 2 through a bacteria reflux pump 7 and a bacteria pumping pipe 6-8.
Pumping the activated sludge precipitated in the reaction tank into the cleaning device for strain separation.
The specific structure of the device of the invention is shown in fig. 2 and fig. 3, and comprises a cleaning device main body 6-1, a bacteria collecting hopper 6-2, a strain circulating system and an aeration system;
the cleaning device main body 6-1 is a rectangular cylindrical structure, the bacteria collecting hopper 6-2 is a hopper-shaped structure consisting of four inclined planes, the inclined angle of the inclined planes of the bacteria collecting hopper 6-2 is 120 degrees, and an opening at the upper part of the bacteria collecting hopper 6-2 is connected with the cleaning device main body 6-1;
the strain circulating system comprises a water inlet pipe 6-3 and a strain pumping pipe 6-8, one end of the water inlet pipe 6-3 is connected with a cleaning device main body 6-1, the other end of the water inlet pipe extends into a reaction tank 2, nitrogen-containing wastewater 3 containing anaerobic ammonium oxidation bacteria to be separated is filled in the reaction tank 2, a strain cleaning pump 4 is arranged on the water inlet pipe 6-3, and a screen 1 is arranged at one end of the water inlet pipe 6-3 extending into the nitrogen-containing wastewater 3, so that strain loss is reduced, the start of the reactor is accelerated, and the effective improvement of the load of the reactor is ensured; one end of the bacteria pumping pipe 6-8 is arranged at the bacteria collecting hopper 6-2, the other end extends into the reaction tank 2, and the bacteria pumping pipe 6-8 is provided with a strain reflux pump 7 for conveying strains to the reaction tank.
The aeration system comprises an air blower 6-9, a main air branch pipe 6-4, a plurality of secondary air branch pipes 6-6 and perforated aeration pipes 6-7, the air blower 6-9 is connected with one end of the main air branch pipe 6-4, the main air branch pipe 6-4 is provided with a plurality of secondary air branch pipes 6-6, each secondary air branch pipe 6-6 is provided with an air valve 6-5 and is communicated with the perforated aeration pipe 6-7, each perforated aeration pipe 6-7 is vertically connected with the corresponding secondary air branch pipe 6-6, the perforated aeration pipes 6-7 are mutually parallel and are fully distributed on the vertical surface of the cleaning device main body 6-1 and the inclined surface of the bacteria collecting hopper 6-2 from top to bottom, all the secondary air branch pipes 6-6 and the perforated aeration pipes 6-7 are arranged on the same side surface of the cleaning device main body 6-1 and the bacteria collecting hopper 6-2, the other side surfaces are not provided with perforated aeration pipes 6-7, and the diameters of holes on the perforated aeration pipes (6-7) are 2.5 mm; the blower provides high-pressure air or nitrogen required by aeration; the blower adopts a variable frequency fan, and the air valve is a manual and starting dual-purpose air valve; in order to ensure that the water inlet direction of the device for purifying and separating anaerobic ammonium oxidizing bacteria is consistent with the rotational flow direction of materials in the device, perforated aeration pipes 6-7 are arranged on the side surfaces of a cleaning device main body 6-1 and a bacteria collecting hopper 6-2 on one side of a water inlet pipe 6-3; the cleaning device main body 6-1 is provided with a drain pipe 6-10, and the direction of the drain pipe 6-10 is vertical to the direction of the water inlet pipe 6-3.
The application method of the device for purifying and separating anaerobic ammonium oxidizing bacteria in the embodiment comprises the following steps:
(1) opening the strain cleaning pump 4 to convey the nitrogen-containing wastewater 3 to the device for purifying and separating anaerobic ammonium oxidation bacteria, opening the air valves 6-5 on all the secondary air branch pipes 6-6, and introducing air into the device for purifying and separating anaerobic ammonium oxidation bacteria for 5min through the perforated aeration pipes 6-7.
(2) Closing the part of the perforated aeration pipes 6-7 at the lower part, keeping the perforated aeration pipes 6-7 at the upper part 35% open, then opening the strain reflux pump 7, and returning the purified strains to the reaction tank 2 through the strain pumping pipes 6-8.
In the process, the aeration amount per square pool surface area is 3m3Air/(m)2•h）。
The working principle of the device in the embodiment is as follows:
the high ammonia nitrogen wastewater completes the reaction of converting ammonia nitrogen into nitrite nitrogen by utilizing AOB in an aeration tank, in addition, the reaction of converting ammonia nitrogen and nitrite nitrogen into nitrogen is completed by utilizing anaerobic ammonium oxidizing bacteria in the aeration tank or another aeration anaerobic ammonium oxidation reaction tank which is not provided with the aeration anaerobic ammonium oxidation reaction tank, and the effluent after the reaction is discharged out of a system after being filtered by a screen. The operation mode of the reaction tank is preferably an SBR mode. Since the mixed bacteria such as heterotrophic bacteria and inorganic components such as calcium carbonate or struvite in the wastewater are also attached to the surfaces of the anaerobic ammonium oxidation bacteria particles to affect the mass transfer efficiency of the anaerobic ammonium oxidation bacteria particles, the activated sludge in the SBR mode precipitation section in the reaction tank needs to be sent to a device for purifying and separating the anaerobic ammonium oxidation bacteria by a bacteria cleaning pump 4 at intervals for bacteria separation. The strains are sent into the main body 6-1 of the cleaning device by the strain cleaning pump 4 through the water inlet pipe 6-3, the blower 6-9 is started to provide high-pressure air or nitrogen required by aeration, and the high-pressure air or nitrogen sequentially passes through the main air pipe 6-4, the branch air pipe 6-6 and the perforated aeration pipe 6-7 to aerate in the tank, and at the stage, the collision friction among the strains is increased due to the strong gas shearing action generated by the aeration, so that the stripping of the mixed bacteria, organic matters and inorganic matters attached to the strains is enhanced, and the separation and purification of the strains are realized. Then the perforated aeration pipes on the inclined plane of the bacteria collecting hopper are closed through the air supply valves 6-5 of the branch air pipes 6-6, only the perforated aeration pipes on the main body of the cleaning device are opened to carry out a partial aeration stage, rotational flow can be formed at the stage, but the number of the aeration pipes is reduced, the rotational flow speed of strain particles is reduced, the radius of the rotational flow is increased, finally the strains can be settled in the bacteria collecting hopper 6-2, and the strains in the bacteria collecting hopper 6-2 are pumped back to a reaction area of the reaction tank 2 or other anaerobic ammonium oxidation main reaction areas through the strain reflux pump 7.
In the device for purifying and separating anaerobic ammonium oxidizing bacteria in the embodiment, the screen is arranged at the opening of the drainage device in the main reaction zone, so that the loss of strains can be reduced, the starting of the reactor is accelerated, and the effective improvement of the load of the reactor is ensured; the cleaning device with staged aeration is arranged to clean and purify the precipitated activated sludge, separate and discharge the mixed bacteria attached to the surfaces of anaerobic ammonium oxidation bacteria particles and the organic and inorganic substances coated outside, and improve the reaction mass transfer efficiency, the system stability and the denitrification load of the whole system.
Example 2
The utility model provides a purify device of separation anaerobism ammonium oxidation fungus, the device uses with reaction tank 2 cooperation, as shown in figure 1 for handle the activated sludge in aeration tank or the anaerobism ammonium oxidation reaction tank of not setting up the aeration, take place in the aeration tank and utilize AOB to accomplish the reaction that ammonia nitrogen converts nitrite nitrogen, take place in the reaction tank of not setting up the aeration and utilize anaerobism ammonium oxidation fungus to accomplish the reaction that ammonia nitrogen and nitrite nitrogen convert nitrite nitrogen and turn into nitrogen. When in use, the activated sludge precipitated in the reaction tank is sent to a staged aeration device for purifying and separating anaerobic ammonium oxidation bacteria through a bacteria cleaning pump 4 at intervals for bacteria separation, wherein the cleaned and purified bacteria in a bacteria collecting hopper 6-2 in the device for purifying and separating anaerobic ammonium oxidation bacteria flow back to a main reaction area of the reaction tank 2 through a bacteria reflux pump 7 and a bacteria pumping pipe 6-8.
Pumping the activated sludge precipitated in the reaction tank into the cleaning device for strain separation.
The specific structure of the device of the invention is shown in fig. 2 and fig. 3, and comprises a cleaning device main body 6-1, a bacteria collecting hopper 6-2, a strain circulating system and an aeration system;
the cleaning device main body 6-1 is a rectangular cylindrical structure, the bacteria collecting hopper 6-2 is a hopper-shaped structure consisting of four inclined planes, the inclined angle of the inclined planes of the bacteria collecting hopper 6-2 is 145 degrees, and an opening at the upper part of the bacteria collecting hopper 6-2 is connected with the cleaning device main body 6-1;
the strain circulating system comprises a water inlet pipe 6-3 and a strain pumping pipe 6-8, one end of the water inlet pipe 6-3 is connected with a cleaning device main body 6-1, the other end of the water inlet pipe is connected with a strain cleaning water inlet pipeline 5, a strain cleaning pump 4 is arranged on the strain cleaning water inlet pipeline 5, the other end of the strain cleaning water inlet pipeline 5 extends into the reaction tank 2, nitrogen-containing wastewater 3 containing anaerobic ammonium oxidation bacteria to be separated is filled in the reaction tank 2, and a screen is arranged at one end of the strain cleaning water inlet pipeline 5 extending into the nitrogen-containing wastewater 3, so that strain loss is reduced, the start of the reactor is accelerated, and the effective improvement of the load of the reactor is ensured; one end of the strain pumping pipe 6-8 is arranged at the strain collecting hopper 6-2, the other end of the strain pumping pipe is connected with the strain return pipeline 8 through the strain return pump 7, the other end of the strain return pipeline 8 extends into the reaction tank 2, and the strain return pump 7 is used for conveying strains to the reaction tank.
The aeration system comprises an air blower 6-9, a main air branch pipe 6-4, a plurality of secondary air branch pipes 6-6 and perforated aeration pipes 6-7, the air blower 6-9 is connected with one end of the main air branch pipe 6-4, the main air branch pipe 6-4 is provided with a plurality of secondary air branch pipes 6-6, each secondary air branch pipe 6-6 is provided with an air valve 6-5 and is communicated with the perforated aeration pipe 6-7, each perforated aeration pipe 6-7 is vertically connected with the corresponding secondary air branch pipe 6-6, the perforated aeration pipes 6-7 are mutually parallel and are fully distributed on the vertical surface of the cleaning device main body 6-1 and the inclined surface of the bacteria collecting hopper 6-2 from top to bottom, all the secondary air branch pipes 6-6 and the perforated aeration pipes 6-7 are arranged on the same side surface of the cleaning device main body 6-1 and the bacteria collecting hopper 6-2, the other side surfaces are not provided with perforated aeration pipes 6-7, and the diameters of holes on the perforated aeration pipes 6-7 are 6 mm; the blower provides high-pressure air or nitrogen required by aeration; the blower adopts a variable frequency fan, and the air valve is a manual and starting dual-purpose air valve; in order to ensure that the water inlet direction of the device for purifying and separating anaerobic ammonium oxidizing bacteria is consistent with the rotational flow direction of materials in the device, perforated aeration pipes 6-7 are arranged on the side surfaces of a cleaning device main body 6-1 and a bacteria collecting hopper 6-2 on one side of a water inlet pipe 6-3; the cleaning device main body 6-1 is provided with a drain pipe 6-10, and the direction of the drain pipe 6-10 is vertical to the direction of the water inlet pipe 6-3.
The application method of the device for purifying and separating anaerobic ammonium oxidizing bacteria in the embodiment comprises the following steps:
(1) opening a strain cleaning pump 4 to convey the nitrogen-containing wastewater 3 to a device for purifying and separating anaerobic ammonium oxidation bacteria, opening air valves 6-5 on all secondary air branch pipes 6-6, and introducing air into the device for purifying and separating anaerobic ammonium oxidation bacteria for 10min through perforated aeration pipes 6-7.
(2) Closing the part of the perforated aeration pipes 6-7 at the lower part, keeping the perforated aeration pipes 6-7 at the upper part of 40% open, then opening the strain reflux pump 7, and returning the purified strains to the reaction tank 2 through the strain pumping pipes 6-8.
In the process, the aeration amount per square pool surface area is 5m3Air/(m)2•h）。
Example 3
The utility model provides a purify device of separation anaerobism ammonium oxidation fungus, the device uses with reaction tank 2 cooperation, as shown in figure 1 for handle the activated sludge in aeration tank or the anaerobism ammonium oxidation reaction tank of not setting up the aeration, take place in the aeration tank and utilize AOB to accomplish the reaction that ammonia nitrogen converts nitrite nitrogen, take place in the reaction tank of not setting up the aeration and utilize anaerobism ammonium oxidation fungus to accomplish the reaction that ammonia nitrogen and nitrite nitrogen convert nitrite nitrogen and turn into nitrogen. When in use, the activated sludge precipitated in the reaction tank is sent to a staged aeration device for purifying and separating anaerobic ammonium oxidation bacteria through a bacteria cleaning pump 4 at intervals for bacteria separation, wherein the cleaned and purified bacteria in a bacteria collecting hopper 6-2 in the device for purifying and separating anaerobic ammonium oxidation bacteria flow back to a main reaction area of the reaction tank 2 through a bacteria reflux pump 7 and a bacteria pumping pipe 6-8.
Pumping the activated sludge precipitated in the reaction tank into the cleaning device for strain separation.
The specific structure of the device of the invention is shown in fig. 2 and fig. 3, and comprises a cleaning device main body 6-1, a bacteria collecting hopper 6-2, a strain circulating system and an aeration system;
the cleaning device main body 6-1 is a rectangular cylindrical structure, the bacteria collecting hopper 6-2 is a hopper-shaped structure consisting of four inclined planes, the inclined angle of the inclined planes of the bacteria collecting hopper 6-2 is 150 degrees, and an opening at the upper part of the bacteria collecting hopper 6-2 is connected with the cleaning device main body 6-1;
the strain circulating system comprises a water inlet pipe 6-3 and a strain pumping pipe 6-8, one end of the water inlet pipe 6-3 is connected with a cleaning device main body 6-1, the other end of the water inlet pipe is connected with a strain cleaning water inlet pipeline 5, a strain cleaning pump 4 is arranged on the strain cleaning water inlet pipeline 5, the other end of the strain cleaning water inlet pipeline 5 extends into the reaction tank 2, nitrogen-containing wastewater 3 containing anaerobic ammonium oxidation bacteria to be separated is filled in the reaction tank 2, and a screen is arranged at one end of the strain cleaning water inlet pipeline 5 extending into the nitrogen-containing wastewater 3, so that strain loss is reduced, the start of the reactor is accelerated, and the effective improvement of the load of the reactor is ensured; one end of the strain pumping pipe 6-8 is arranged at the strain collecting hopper 6-2, the other end of the strain pumping pipe is connected with the strain return pipeline 8 through the strain return pump 7, the other end of the strain return pipeline 8 extends into the reaction tank 2, and the strain return pump 7 is used for conveying strains to the reaction tank.
The aeration system comprises an air blower 6-9, a main air branch pipe 6-4, a plurality of secondary air branch pipes 6-6 and perforated aeration pipes 6-7, the air blower 6-9 is connected with one end of the main air branch pipe 6-4, the main air branch pipe 6-4 is provided with a plurality of secondary air branch pipes 6-6, each secondary air branch pipe 6-6 is provided with an air valve 6-5 and is communicated with the perforated aeration pipe 6-7, each perforated aeration pipe 6-7 is vertically connected with the corresponding secondary air branch pipe 6-6, the perforated aeration pipes 6-7 are mutually parallel and are fully distributed on the vertical surface of the cleaning device main body 6-1 and the inclined surface of the bacteria collecting hopper 6-2 from top to bottom, all the secondary air branch pipes 6-6 and the perforated aeration pipes 6-7 are arranged on the same side surface of the cleaning device main body 6-1 and the bacteria collecting hopper 6-2, the other side surfaces are not provided with perforated aeration pipes 6-7, and the diameters of holes on the perforated aeration pipes 6-7 are 4 mm; the blower provides high-pressure air or nitrogen required by aeration; the blower adopts a variable frequency fan, and the air valve is a manual and starting dual-purpose air valve; in order to ensure that the water inlet direction of the device for purifying and separating anaerobic ammonium oxidizing bacteria is consistent with the rotational flow direction of materials in the device, perforated aeration pipes 6-7 are arranged on the side surfaces of a cleaning device main body 6-1 and a bacteria collecting hopper 6-2 on one side of a water inlet pipe 6-3; the cleaning device main body 6-1 is provided with a drain pipe 6-10, and the direction of the drain pipe 6-10 is vertical to the direction of the water inlet pipe 6-3.
The application method of the device for purifying and separating anaerobic ammonium oxidizing bacteria in the embodiment comprises the following steps:
(1) opening the strain cleaning pump 4 to convey the nitrogen-containing wastewater 3 to the device for purifying and separating anaerobic ammonium oxidation bacteria, opening the air valves 6-5 on all the secondary air branch pipes 6-6, and introducing air into the device for purifying and separating anaerobic ammonium oxidation bacteria for 15min through the perforated aeration pipes 6-7.
(2) Closing the part of the perforated aeration pipes 6-7 at the lower part, keeping the perforated aeration pipes 6-7 at the upper part of 50% open, then opening the strain reflux pump 7, and returning the purified strains to the reaction tank 2 through the strain pumping pipes 6-8.
In the process, the aeration amount per square pool surface area is 3m3Air/(m)2•h）。
Example 4
The utility model provides a purify device of separation anaerobism ammonium oxidation fungus, the device uses with reaction tank 2 cooperation, as shown in figure 1 for handle the activated sludge in aeration tank or the anaerobism ammonium oxidation reaction tank of not setting up the aeration, take place in the aeration tank and utilize AOB to accomplish the reaction that ammonia nitrogen converts nitrite nitrogen, take place in the reaction tank of not setting up the aeration and utilize anaerobism ammonium oxidation fungus to accomplish the reaction that ammonia nitrogen and nitrite nitrogen convert nitrite nitrogen and turn into nitrogen. When in use, the activated sludge precipitated in the reaction tank is sent to a staged aeration device for purifying and separating anaerobic ammonium oxidation bacteria through a bacteria cleaning pump 4 at intervals for bacteria separation, wherein the cleaned and purified bacteria in a bacteria collecting hopper 6-2 in the device for purifying and separating anaerobic ammonium oxidation bacteria flow back to a main reaction area of the reaction tank 2 through a bacteria reflux pump 7 and a bacteria pumping pipe 6-8.
Pumping the activated sludge precipitated in the reaction tank into the cleaning device for strain separation.
The specific structure of the device of the invention is shown in fig. 2 and fig. 3, and comprises a cleaning device main body 6-1, a bacteria collecting hopper 6-2, a strain circulating system and an aeration system;
the cleaning device main body 6-1 is a rectangular cylindrical structure, the bacteria collecting hopper 6-2 is a hopper-shaped structure consisting of four inclined planes, the inclined plane of the bacteria collecting hopper 6-2 has an inclined angle of 130 degrees, and an opening at the upper part of the bacteria collecting hopper 6-2 is connected with the cleaning device main body 6-1;
the strain circulating system comprises a water inlet pipe 6-3 and a strain pumping pipe 6-8, one end of the water inlet pipe 6-3 is connected with a cleaning device main body 6-1, the other end of the water inlet pipe is connected with a strain cleaning water inlet pipeline 5, a strain cleaning pump 4 is arranged on the strain cleaning water inlet pipeline 5, the other end of the strain cleaning water inlet pipeline 5 extends into the reaction tank 2, nitrogen-containing wastewater 3 containing anaerobic ammonium oxidation bacteria to be separated is filled in the reaction tank 2, and a screen is arranged at one end of the strain cleaning water inlet pipeline 5 extending into the nitrogen-containing wastewater 3, so that strain loss is reduced, the start of the reactor is accelerated, and the effective improvement of the load of the reactor is ensured; one end of the strain pumping pipe 6-8 is arranged at the strain collecting hopper 6-2, the other end of the strain pumping pipe is connected with the strain return pipeline 8 through the strain return pump 7, the other end of the strain return pipeline 8 extends into the reaction tank 2, and the strain return pump 7 is used for conveying strains to the reaction tank.
The aeration system comprises an air blower 6-9, a main air branch pipe 6-4, a plurality of secondary air branch pipes 6-6 and perforated aeration pipes 6-7, the air blower 6-9 is connected with one end of the main air branch pipe 6-4, the main air branch pipe 6-4 is provided with a plurality of secondary air branch pipes 6-6, each secondary air branch pipe 6-6 is provided with an air valve 6-5 and is communicated with the perforated aeration pipe 6-7, each perforated aeration pipe 6-7 is vertically connected with the corresponding secondary air branch pipe 6-6, the perforated aeration pipes 6-7 are mutually parallel and are fully distributed on the vertical surface of the cleaning device main body 6-1 and the inclined surface of the bacteria collecting hopper 6-2 from top to bottom, all the secondary air branch pipes 6-6 and the perforated aeration pipes 6-7 are arranged on the same side surface of the cleaning device main body 6-1 and the bacteria collecting hopper 6-2, the other side surfaces are not provided with perforated aeration pipes 6-7, and the diameters of holes on the perforated aeration pipes 6-7 are 3 mm; the blower provides high-pressure air or nitrogen required by aeration; the blower adopts a variable frequency fan, and the air valve is a manual and starting dual-purpose air valve; in order to ensure that the water inlet direction of the device for purifying and separating anaerobic ammonium oxidizing bacteria is consistent with the rotational flow direction of materials in the device, perforated aeration pipes 6-7 are arranged on the side surfaces of a cleaning device main body 6-1 and a bacteria collecting hopper 6-2 on one side of a water inlet pipe 6-3; the cleaning device main body 6-1 is provided with a drain pipe 6-10, and the direction of the drain pipe 6-10 is vertical to the direction of the water inlet pipe 6-3.
The application method of the device for purifying and separating anaerobic ammonium oxidizing bacteria in the embodiment comprises the following steps:
(1) opening a strain cleaning pump 4 to convey the nitrogen-containing wastewater 3 to a device for purifying and separating anaerobic ammonium oxidation bacteria, opening air valves 6-5 on all secondary air branch pipes 6-6, and introducing air into the device for purifying and separating anaerobic ammonium oxidation bacteria for 10min through perforated aeration pipes 6-7.
(2) Closing the part of the perforated aeration pipes 6-7 at the lower part, keeping the perforated aeration pipes 6-7 at the upper part of 30% open, then opening the strain reflux pump 7, and returning the purified strains to the reaction tank 2 through the strain pumping pipes 6-8.
In the process, the aeration amount per square pool surface area is 4m3Air/(m)2•h）。
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (8)
1. A device for purifying and separating anaerobic ammonium oxidation bacteria is characterized by comprising a cleaning device main body (6-1), a bacteria collecting hopper (6-2), a strain circulating system and an aeration system;
the bacteria collecting hopper (6-2) is of a structure with a large upper part and a small lower part, and an opening at the upper part of the bacteria collecting hopper (6-2) is connected with the cleaning device main body (6-1);
the strain circulating system comprises a water inlet pipe (6-3), a water outlet pipe (6-10) and a strain pumping pipe (6-8), one end of the water inlet pipe (6-3) is connected with the cleaning device main body (6-1), the other end of the water inlet pipe extends into the reaction tank (2), and a strain cleaning pump (4) is arranged on the water inlet pipe (6-3); one end of the bacteria pumping pipe (6-8) is arranged at the bacteria collecting hopper (6-2), the other end of the bacteria pumping pipe extends into the reaction tank (2), and a strain reflux pump (7) is arranged on the bacteria pumping pipe (6-8); the drain pipe (6-10) is connected with the cleaning device main body (6-1);
the aeration system comprises an air blower (6-9), a main air branch pipe (6-4), a secondary air branch pipe (6-6) and a perforated aeration pipe (6-7), wherein the air blower (6-9) is connected with one end of the main air branch pipe (6-4), the main air branch pipe (6-4) is provided with a plurality of secondary air branch pipes (6-6), each secondary air branch pipe (6-6) is provided with an air valve (6-5) and is communicated with the perforated aeration pipe (6-7);
the perforated aeration pipes (6-7) are vertically connected with the secondary air branch pipes (6-6), and each perforated aeration pipe (6-7) is distributed in parallel;
the cleaning device main body (6-1) is of a rectangular cylindrical structure, the bacteria collecting hopper (6-2) is of a hopper-shaped structure consisting of four inclined planes, the perforated aeration pipes (6-7) are fully distributed on the vertical plane of the cleaning device main body (6-1) and the inclined plane of the bacteria collecting hopper (6-2), all the perforated aeration pipes (6-7) are arranged on the side face of the cleaning device main body (6-1) in the same direction as the bacteria collecting hopper (6-2), and the perforated aeration pipes (6-7) are not arranged on other side faces;
when in use, the method comprises the following steps:
1) opening a strain cleaning pump (4) to convey nitrogen-containing wastewater (3) to the device for purifying and separating anaerobic ammonium oxidizing bacteria, opening air valves (6-5) on all secondary air branch pipes (6-6), and introducing air into the device for purifying and separating anaerobic ammonium oxidizing bacteria through perforated aeration pipes (6-7);
2) the perforated aeration pipe (6-7) on the inclined plane of the bacteria collecting hopper is closed, the perforated aeration pipe (6-7) on the cleaning device main body is kept opened, then the strain reflux pump (7) is opened, and the purified strains return to the reaction tank (2) through the strain pumping pipe (6-8).
2. The apparatus for purifying and separating anaerobic ammonium oxidizing bacteria according to claim 1, wherein the perforated aeration pipe (6-7) has a hole diameter of 2.5-6 mm and an aeration amount of 3-5 m per square tank surface area3Air/(m)2•h）。
3. The device for purifying and separating anaerobic ammonium oxidizing bacteria according to claim 1, wherein the end of the water inlet pipe (6-3) extending into the reaction tank (2) is provided with a screen.
4. The apparatus of claim 1, wherein the blower is a variable frequency blower, and the air valve is a manual or start-up air valve.
5. The apparatus for purifying and separating anaerobic ammonium oxidizing bacteria according to claim 1, wherein the perforated aeration pipe (6-7) and the water inlet pipe (6-3) are arranged on the same side of the apparatus for purifying and separating anaerobic ammonium oxidizing bacteria; the direction of the water discharge pipe (6-10) is vertical to the direction of the water inlet pipe (6-3).
6. The device for purifying and separating anaerobic ammonium oxidizing bacteria according to claim 1, wherein the side surface of the bacteria collecting hopper (6-2) is inclined at an angle of 120-150 °.
7. The application of the device for purifying and separating anaerobic ammonium oxidizing bacteria as claimed in claim 1, which comprises the following steps:
1) opening a strain cleaning pump (4) to convey nitrogen-containing wastewater (3) to the device for purifying and separating anaerobic ammonium oxidizing bacteria, opening air valves (6-5) on all secondary air branch pipes (6-6), and introducing air into the device for purifying and separating anaerobic ammonium oxidizing bacteria through perforated aeration pipes (6-7);
2) the perforated aeration pipe (6-7) on the inclined plane of the bacteria collecting hopper is closed, the perforated aeration pipe (6-7) on the cleaning device main body is kept opened, then the strain reflux pump (7) is opened, and the purified strains return to the reaction tank (2) through the strain pumping pipe (6-8).
8. The application of the device for purifying and separating anaerobic ammonium oxidizing bacteria according to claim 7, wherein the duration of the air introduced into the perforated aeration pipe (6-7) in the step (1) is 5-15 min; the number of the perforated aeration pipes (6-7) on the cleaning device main body in the step (2) is 30-50% of the total number of the perforated aeration pipes (6-7).
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| CN201162007Y (en) * | 2007-12-25 | 2008-12-10 | 浙江大学 | Anaerobic ammonia oxidation bacterium concentrating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2383442T5 (en) * | 2008-09-12 | 2019-01-24 | Demon Gmbh | Procedure for the treatment of residual waters with ammonium content |
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| CN201162007Y (en) * | 2007-12-25 | 2008-12-10 | 浙江大学 | Anaerobic ammonia oxidation bacterium concentrating device |
| CN202089829U (en) * | 2011-05-27 | 2011-12-28 | 江苏兆盛环保集团有限公司 | High-efficiency sludge-water-mixed anaerobic water distributing device |
| CN104108788A (en) * | 2013-04-16 | 2014-10-22 | 达蒙有限公司 | Method and installation for treating wastewater containing ammonia |
| CN105396334A (en) * | 2015-12-07 | 2016-03-16 | 宋德安 | A staged aerated grit washing and removing device used for an aerated grit chamber |
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