Anaerobic ammonia oxidation device

Abstract

The anaerobic ammonia oxidation device comprises an anaerobic ammonia oxidation pond and a water inlet pipe, umbrella-shaped water distributors are arranged on the water inlet pipe, and the umbrella-shaped water distributors are uniformly distributed; a biological membrane and a gas stirring device are arranged in the anaerobic ammonia oxidation pond, the biological membrane is arranged above the umbrella-shaped water distributor, and the gas stirring device is arranged below the umbrella-shaped water distributor; the device further comprises a three-phase separator, the three-phase separator is installed above the biological membrane, and a water outlet and a gas outlet are formed in the three-phase separator and connected with a waste water recycling tank and a recycling boiler respectively. The umbrella-shaped water distributor improves the overall running state of the anaerobic ammonia oxidation pond by improving the water distribution form, and the stability of the anaerobic ammonia oxidation pond is improved; a biological membrane is added, and a microbial carrier is provided, so that microorganisms can be better retained, the loss of activated sludge is reduced, and the concentration of the activated sludge in the anaerobic ammonia oxidation tank is improved; biogas generated through separation of the three-phase separator is used for recycling boiler combustion, waste water generated through separation is collected by the waste water recycling tank, and environment pollution is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an anaerobic ammonia oxidation device. Background Art

[0002] Existing sewage ammonia nitrogen treatment often adopts anoxic + aerobic biological denitrification, that is, autotrophic aerobic nitrifying bacteria are used to convert ammonia nitrogen in sewage into nitrate or nitrite. This process requires the consumption of a large amount of carbon source and oxygen, which is an aerobic state; then heterotrophic anaerobic denitrifying bacteria are used to convert nitrate and nitrite in sewage into nitrogen gas. This process requires the consumption of a large amount of carbon source and alkali. This sewage treatment technology is mature, but it has high operating costs, unstable denitrification effect, and low volumetric load of denitrification. The construction of sewage treatment structures requires a large area of ​​land.

[0003] However, with the development of technology, the market has seen the emergence of anaerobic ammonium oxidation technology to treat ammonia nitrogen wastewater, that is, using an autotrophic anaerobic bacteria to directly convert ammonia nitrogen in wastewater into nitrogen gas. However, this technology has disadvantages such as difficulty in control, poor impact resistance, and poor bacterial growth. In addition, the existing anaerobic ammonium oxidation process uses perforated water distribution, which causes great disturbance to the bottom of the internal system of the pool, resulting in the breaking of the well-grown anaerobic bacteria, making it easier to lose. Utility Model Content

[0004] In view of the above, the utility model provides an anaerobic ammonium oxidation device to solve the problems existing in the above background technology.

[0005] The technical solution provided by the utility model is as follows: an anaerobic ammonium oxidation device, including an anaerobic ammonium oxidation tank with anaerobic ammonium oxidizing bacteria activated sludge and anaerobic ammonium oxidizing bacteria arranged inside, including a water inlet pipe for discharging sewage into the anaerobic ammonium oxidation tank, the water inlet pipe is installed at the bottom of the anaerobic ammonium oxidation tank, and a plurality of umbrella-shaped water distributors facing the bottom of the anaerobic ammonium oxidation tank are arranged on the water inlet pipe, and the umbrella-shaped water distributors are evenly distributed to improve the impact of sewage discharge on the anaerobic ammonium oxidizing bacteria activated sludge and anaerobic ammonium oxidizing bacteria; the anaerobic ammonium oxidation tank is provided with a plurality of groups of A biofilm and a gas stirring device are used for membrane biofiltration treatment, wherein the biofilm is installed above an umbrella-shaped water distributor, and the gas stirring device is arranged below the umbrella-shaped water distributor; and also includes a three-phase separator for separating wastewater, anaerobic ammonia-oxidizing bacteria, activated sludge and biogas, wherein the three-phase separator is installed above the biofilm, and is provided with a water outlet and a gas outlet, wherein the water outlet is connected to a water outlet pipe, and the water outlet end of the water outlet pipe is connected to a wastewater recovery tank, and the gas outlet is connected to a biogas pipe, and the gas outlet end of the biogas pipe is connected to a recovery boiler.

[0006] Furthermore, there are no less than three umbrella-shaped water distributors, and a water inlet valve is provided on the water inlet pipe.

[0007] Furthermore, it also includes a reflux pipe that can even out the concentration of wastewater in the anaerobic ammonium oxidation tank. The upper end of the reflux pipe is arranged at the upper part of the anaerobic ammonium oxidation tank, and the lower end of the reflux pipe is connected to the water inlet pipe. Through intermittent reflux, the low-concentration wastewater in the upper part of the anaerobic ammonium oxidation tank is refluxed to the lower part.

[0008] Furthermore, the gas stirring device includes an air supply device, an air guide pipe and an air nozzle. The air guide pipe is arranged at the bottom of the anaerobic ammonia oxidation tank. The air guide pipe is provided with an air nozzle on the surface of the air guide pipe. The air guide pipe is connected to the air supply device. The air supply device is a carbon dioxide gas supply device, which is installed on one side of the anaerobic ammonia oxidation tank.

[0009] Furthermore, it also includes a dissolved oxygen tester, the probe of which extends into the anaerobic ammonia oxidation tank; and the dissolved oxygen tester is electrically connected to the gas supply device.

[0010] Furthermore, the anaerobic ammonium oxidation tank is a carbon steel structure.

[0011] The beneficial effects of the utility model are:

[0012] 1. Research and develop an umbrella-shaped water distributor, which is evenly distributed to improve the impact of sewage discharge on the activated sludge and anaerobic ammonia oxidizing bacteria. By improving the water distribution form, the overall operation state of the anaerobic ammonia oxidation tank is improved, and the stability of the anaerobic ammonia oxidation tank is improved;

[0013] 2. Increase biofilm and provide microbial carriers, which can better retain microorganisms, reduce the loss of activated sludge, increase the concentration of activated sludge in the anaerobic ammonia oxidation tank, and at the same time increase the wastewater treatment load and improve the system's impact resistance;

[0014] 3. The biogas separated by the three-phase separator is used for combustion in the recovery boiler, and the wastewater generated by the separation is collected by the wastewater recovery tank to avoid environmental pollution;

[0015] 4. Intercept the activated sludge of anaerobic ammonium oxidizing bacteria, enrich the anaerobic ammonium oxidizing bacteria and improve the denitrification efficiency of anaerobic ammonium oxidizing bacteria, reduce the input of large amounts of carbon sources and alkali, and reduce operating costs; BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 This is a circuit flow chart of the utility model.

[0018] In the figure, 1. anaerobic ammonia oxidation tank; 2. water inlet pipe; 3. umbrella-shaped water distributor; 4. water inlet valve; 5. biofilm; 6. three-phase separator; 601. biogas pipe; 602. recovery boiler; 603. water outlet pipe; 604. wastewater recovery tank; 7. return pipe; 8. gas supply device; 9. dissolved oxygen tester; 10. air guide pipe; 11. nozzle. DETAILED DESCRIPTION

[0019] The utility model is further described below with reference to the accompanying drawings and some embodiments.

[0020] exist Figure 1-Figure 2 In the invention, an anaerobic ammonium oxidation device comprises an anaerobic ammonium oxidation tank 1 in which anaerobic ammonium oxidizing bacteria activated sludge and anaerobic ammonium oxidizing bacteria are arranged, and comprises a water inlet pipe 2 for discharging sewage into the anaerobic ammonium oxidation tank 1, wherein the water inlet pipe 2 is installed at the bottom of the anaerobic ammonium oxidation tank 1, and a plurality of umbrella-shaped water distributors 3 are arranged on the water inlet pipe 2 toward the bottom of the anaerobic ammonium oxidation tank 1, and the umbrella-shaped water distributors 3 are evenly distributed to improve the impact of sewage discharge on the anaerobic ammonium oxidizing bacteria activated sludge and anaerobic ammonium oxidizing bacteria; the invention discloses an anaerobic ammonium oxidation device, comprising an anaerobic ammonium oxidation tank 1 in which anaerobic ammonium oxidizing bacteria activated sludge and anaerobic ammonium oxidizing bacteria are arranged; The umbrella-shaped water distributor 3 is evenly distributed to improve the impact of sewage discharge on the anaerobic ammonia oxidizing bacteria, activated sludge and anaerobic ammonia oxidizing bacteria, and improve the overall operation state of the anaerobic ammonia oxidizing tank 1 by improving the water distribution form, thereby improving the stability of the anaerobic ammonia oxidizing tank 1, so that the anaerobic ammonia oxidizing bacteria can produce anaerobic ammonia oxidizing bacteria clusters with better morphology, stronger growth ability and stability, and fill the anaerobic ammonia oxidizing tank 1 with anaerobic ammonia oxidizing bacteria, and directly convert ammonia nitrogen in the wastewater into nitrogen gas through the action of anaerobic ammonia oxidizing bacteria.

[0021] In this embodiment, several groups of biofilms 5 and gas stirring devices for membrane biological filtration treatment are arranged in the anaerobic ammonia oxidation tank 1. The biofilm 5 is installed above the umbrella-shaped water distributor 3, and the gas stirring device is arranged below the umbrella-shaped water distributor 3. Adding the biofilm 5 and providing a microbial carrier can better retain microorganisms, reduce the loss of activated sludge, increase the activated sludge concentration in the anaerobic ammonia oxidation tank 1, and at the same time increase the wastewater treatment load, thereby improving the system's impact resistance.

[0022] In this embodiment, a three-phase separator 6 is also included for separating wastewater, anaerobic ammonium oxidizing bacteria activated sludge and biogas. The three-phase separator 6 is installed above the biofilm 5. A water outlet and a gas outlet are provided on the three-phase separator 6. The water outlet is connected to a water outlet pipe 603. The water outlet end of the water outlet pipe 603 is connected to a wastewater recovery tank 604. The gas outlet is connected to a biogas pipe 601. The gas outlet end of the biogas pipe 601 is connected to a recovery boiler 602. In the process of the wastewater flowing straight up from the anaerobic ammonium oxidizing tank 1, the wastewater, anaerobic ammonium oxidizing bacteria activated sludge and biogas are effectively separated by the three-phase separator 6. The anaerobic ammonium oxidizing bacteria activated sludge will fall back to the middle and lower part of the anaerobic ammonium oxidizing tank 1 due to its own weight and resistance. The biogas generated by the separation is used for combustion in the recovery boiler 602. The wastewater generated by the separation is collected by the wastewater recovery tank 604 to avoid polluting the environment.

[0023] In this embodiment, there are no less than three umbrella-shaped water distributors 3, and a water inlet valve 4 is provided on the water inlet pipe 2; multiple umbrella-shaped water distributors 3 are evenly distributed at the bottom of the anaerobic ammonia oxidation tank 1 to improve the impact of sewage discharge on the activated sludge and anaerobic ammonia oxidation bacteria of the anaerobic ammonia oxidation bacteria; the opening and closing of the water inlet valve 4 can artificially control the wastewater discharge amount of the anaerobic ammonia oxidation tank 1.

[0024] In this embodiment, a reflux pipe 7 is further included which can make the wastewater concentration in the anaerobic ammonia oxidation tank 1 uniform. The upper end of the reflux pipe 7 is arranged at the upper part of the anaerobic ammonia oxidation tank 1, and the lower end of the reflux pipe 7 is connected to the water inlet pipe 2. Through intermittent reflux, the low-concentration wastewater in the upper part of the anaerobic ammonia oxidation tank 1 is refluxed to the lower part; making the wastewater concentration in the anaerobic ammonia oxidation tank 1 uniform helps to improve the conversion efficiency of the anaerobic ammonia oxidizing bacteria in directly converting ammonia nitrogen in the wastewater into nitrogen gas.

[0025] In this embodiment, the gas stirring device includes an air supply device 8, an air duct 10 and an air nozzle 11. The air duct 10 is arranged at the bottom of the anaerobic ammonium oxidation tank 1. The surface of the air duct 10 is provided with an air nozzle 11. The air duct 10 is connected to the air supply device 8. The air supply device 8 is a carbon dioxide gas supply device 8, which is installed on one side of the anaerobic ammonium oxidation tank 1. When in use, the air supply device 8 provides carbon dioxide gas to the anaerobic ammonium oxidation tank 1, which has a disturbing effect on the tank water, so that the anaerobic ammonium oxidation bacteria activated sludge is fully in contact with the sewage, thereby increasing its denitrification efficiency.

[0026] In this embodiment, a dissolved oxygen tester 9 is also included, and the probe of the dissolved oxygen tester 9 extends into the anaerobic ammonia oxidation tank 1; the dissolved oxygen tester 9 is electrically connected to the gas supply device 8; the dissolved oxygen tester 9 can detect the oxygen content in the anaerobic ammonia oxidation tank 1. When the oxygen content is high, the gas supply device 8 is started to reduce the oxygen content in the water to ensure the anaerobic environment required for the denitrification reaction.

[0027] In this embodiment, the anaerobic ammonium oxidation tank 1 is a carbon steel structure, which is corrosion-resistant and has a long service life.

[0028] In this embodiment, the dissolved oxygen tester 9 is a common dissolved oxygen tester device, such as the Yuanhengtong YHT8402 ​​model, SM102-OX-12B-HI model dissolved oxygen tester, etc.

[0029] During the specific implementation of the utility model: the umbrella-shaped water distributor 3 is evenly distributed, which improves the impact of sewage discharge on the anaerobic ammonia oxidation bacteria activated sludge and the anaerobic ammonia oxidation bacteria, and improves the stability of the anaerobic ammonia oxidation tank 1; the wastewater flows straight down and up in the anaerobic ammonia oxidation tank 1, and finally the wastewater, the anaerobic ammonia oxidation bacteria activated sludge and the biogas are effectively separated by the three-phase separator 6, and the anaerobic ammonia oxidation bacteria activated sludge will fall back to the middle and lower part of the anaerobic ammonia oxidation tank 1 due to its own weight and resistance, and the biogas generated by the separation is used for combustion in the recovery boiler 602, and the wastewater generated by the separation is collected by the wastewater recovery tank 604 to avoid polluting the environment; the dissolved oxygen tester 9 can detect the oxygen content in the anaerobic ammonia oxidation tank 1, and when the oxygen content is high, the gas supply device 8 is started to reduce the oxygen content in the water to ensure the oxygen-free environment required for the denitrification reaction; and the gas supply device 8 has a disturbing effect on the pool water, so that the anaerobic ammonia oxidation bacteria activated sludge and the sewage are fully in contact, thereby increasing its denitrification efficiency.

[0030] It is worth noting that: in the description of the present utility model, the meaning of "multiple" is two or more than two, unless otherwise clearly and specifically defined. In the present utility model, unless otherwise clearly specified and defined, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; the circuits described in the present utility model are all commonly used circuits in the field, and other related components are all existing commonly used components. For ordinary technicians in the field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An anaerobic ammonium oxidation device, comprising an anaerobic ammonium oxidation tank with anaerobic ammonium oxidizing bacteria activated sludge and anaerobic ammonium oxidizing bacteria arranged therein, characterized in that: It includes a water inlet pipe for discharging sewage into the anaerobic ammonium oxidation tank, the water inlet pipe is installed at the bottom of the anaerobic ammonium oxidation tank, and a plurality of umbrella-shaped water distributors facing the bottom of the anaerobic ammonium oxidation tank are arranged on the water inlet pipe, and the umbrella-shaped water distributors are evenly distributed to improve the impact of sewage discharge on the anaerobic ammonium oxidizing bacteria, activated sludge and anaerobic ammonium oxidizing bacteria; The anaerobic ammonia oxidation tank is provided with a plurality of groups of biofilms and gas stirring devices for membrane biofiltration treatment, wherein the biofilms are installed above the umbrella-shaped water distributor, and the gas stirring device is arranged below the umbrella-shaped water distributor; It also includes a three-phase separator for separating wastewater, anaerobic ammonia-oxidizing bacteria activated sludge and biogas. The three-phase separator is installed above the biofilm. The three-phase separator is provided with a water outlet and a gas outlet. The water outlet is connected to a water outlet pipe, and the water outlet end of the water outlet pipe is connected to a wastewater recovery tank. The gas outlet is connected to a biogas pipe, and the gas outlet end of the biogas pipe is connected to a recovery boiler.

2. The anaerobic ammonium oxidation device according to claim 1, characterized in that: There are no less than three umbrella-shaped water distributors, and a water inlet valve is arranged on the water inlet pipe.

3. The anaerobic ammonium oxidation device according to claim 1, characterized in that: It also includes a return pipe that can even out the concentration of wastewater in the anaerobic ammonium oxidation tank. The upper end of the return pipe is arranged at the upper part of the anaerobic ammonium oxidation tank, and the lower end of the return pipe is connected to the water inlet pipe. Through intermittent reflux, the low-concentration wastewater in the upper part of the anaerobic ammonium oxidation tank is returned to the lower part.

4. The anaerobic ammonium oxidation device according to claim 1, characterized in that: The gas stirring device includes an air supply device, an air guide pipe and an air nozzle. The air guide pipe is arranged at the bottom of the anaerobic ammonia oxidation tank. The air guide pipe is provided with an air nozzle on the surface of the air guide pipe. The air guide pipe is connected to the air supply device. The air supply device is a carbon dioxide gas supply device installed on one side of the anaerobic ammonia oxidation tank.

5. The anaerobic ammonium oxidation device according to claim 4, characterized in that: It also includes a dissolved oxygen tester, the probe of which extends into the anaerobic ammonia oxidation tank; the dissolved oxygen tester is electrically connected to the gas supply device.

6. The anaerobic ammonium oxidation device according to claim 1, characterized in that: The anaerobic ammonium oxidation tank is a carbon steel structure.

Images