Controllable denitrification system applied to treatment of aquaculture tail water

Abstract

The utility model discloses a controllable denitrification system applied to treatment of aquaculture tail water, and relates to the technical field of denitrification.The controllable denitrification system is characterized in that an exhaust pipe is connected to the top of a reactor, a first valve is arranged on the exhaust pipe, a drainage pipe is connected to the bottom of the reactor, and a second valve is arranged on the drainage pipe; the sewage conveying pipe, the first steam conveying pipe and the air conveying pipe are all connected with the reactor, a third valve is arranged on the sewage conveying pipe, a fourth valve is arranged on the first steam conveying pipe, a fifth valve is arranged on the air conveying pipe, the temperature sensor is arranged in the reactor, and the heating assembly is arranged on the peripheral face of the reactor. The controller is connected with the heating assembly and the temperature sensor. Sewage in the reactor can be sterilized by utilizing the first steam conveying pipe and the heating assembly, the aeration rate in the reactor is controlled by regulating and controlling the opening degrees of the third valve and the fifth valve, and the temperature in the reactor is controlled by utilizing the heating assembly, so that heterotrophic nitrification-aerobic denitrification bacteria in the reactor occupy a good ecological niche, and the sewage denitrification effect is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of denitrification, in particular to a controllable denitrification system applied to treatment of aquaculture tail water. BACKGROUND

[0002] With the continuous development of society and the continuous increase of population, in order to meet the demand for protein, the aquaculture industry in China has developed rapidly in recent years, and high-density breeding has gradually become the mainstream. However, the excessive accumulation of feed residues and breeding product metabolites in the system produces a large amount of breeding nitrogen pollution wastewater, which continuously increases the nitrogen content in the breeding water body and continuously deteriorates the water quality, seriously damages the environment in the breeding water body, and has toxic effects on the breeding animals, and the frequency of breeding animal diseases has increased significantly. Moreover, the direct discharge of breeding tail water rich in feces and leftover feed will cause serious ecological and environmental problems such as coastal eutrophication and harmful algae outbreak.

[0003] Compared with traditional biological denitrification, the denitrification capacity of heterotrophic nitrification-aerobic denitrification bacteria is more excellent. As a new type of denitrification technology, heterotrophic nitrification-aerobic denitrification technology stands out with the characteristics of high efficiency and low cost, tolerance to higher organic load, more economical and rapid denitrification, strong environmental adaptability, and the like. It can convert ammonia nitrogen into nitrogen, and has strong removal effect on nitrate nitrogen and nitrite nitrogen, and has broad application prospect in the field of biological denitrification. At present, the heterotrophic nitrification-aerobic denitrification bacteria are directly put into the breeding wastewater pool. However, due to the existence of numerous bacterial communities in the breeding wastewater pool, the heterotrophic nitrification-aerobic denitrification bacteria cannot occupy the ecological niche well, thereby leading to unsatisfactory denitrification effect.

[0004] Therefore, how to make the heterotrophic nitrification-aerobic denitrification bacteria occupy a good ecological niche and improve the denitrification effect of wastewater is a problem to be solved by those skilled in the art. The utility model discloses a controllable denitrification system applied to treatment of aquaculture tail water.

[0005] The application aims to provide a controllable denitrification system applied to treatment of aquaculture tail water, which can solve the problem that the heterotrophic nitrification-aerobic denitrification bacteria cannot occupy the ecological niche well when directly put into the breeding wastewater pool, thereby leading to unsatisfactory denitrification effect.

[0006] To solve the above technical problems, the application provides a controllable denitrification system applied to treatment of aquaculture tail water, which comprises a reactor, an exhaust pipe, a first valve, a drain pipe, a second valve, a sewage conveying pipe, a first steam conveying pipe, an air conveying pipe, a third valve, a fourth valve, a fifth valve, a temperature sensor, a heating assembly and a controller.

[0007] The top of the reactor is connected to an exhaust pipe, which is provided with a first valve. The bottom of the reactor is connected to a drain pipe, which is provided with a second valve. The sewage conveying pipe, the first steam conveying pipe and the air conveying pipe are all connected to the reactor. The sewage conveying pipe is provided with the third valve, the first steam conveying pipe is provided with the fourth valve, and the air conveying pipe is provided with the fifth valve. The temperature sensor is provided in the reactor, and the heating component is provided on the outer peripheral surface of the reactor for heating the reactor. The controller is respectively connected to the heating component and the temperature sensor.

[0008] In a feasible embodiment, the heating component includes a water reservoir, a constant temperature water delivery pipe, a sixth valve, a drainage and exhaust pipe, and a seventh valve. The reactor is arranged in the water reservoir. The top opening edge of the water reservoir is sealedly connected to the outer peripheral surface of the reactor near the top. The bottom opening edge of the water reservoir is sealedly connected to the outer peripheral surface of the drainage pipe. A hollow interlayer is formed between the inner wall of the water reservoir and the outer wall of the reactor. The constant temperature water delivery pipe and the drainage and exhaust pipe are both connected to the water reservoir. The constant temperature water delivery pipe is used to deliver constant temperature water to the hollow interlayer. The sixth valve is arranged on the constant temperature water input pipe, and the seventh valve is arranged on the drainage and exhaust pipe.

[0009] In a feasible embodiment, it also includes a cooling water delivery pipe, an eighth valve provided on the cooling water delivery pipe, a second steam delivery pipe and a ninth valve provided on the second steam delivery pipe. The cooling water delivery pipe and the second steam delivery pipe are both connected to the water reservoir. The cooling water delivery pipe is used to input cooling water into the hollow interlayer, and the steam delivery pipe is used to deliver steam to the hollow interlayer.

[0010] In a feasible embodiment, it also includes a first collecting pipe, a tenth valve provided on the first collecting pipe, a first air filter, a second air filter and a third air filter, the first end of the first collecting pipe is respectively connected to the first steam conveying pipe and the air conveying pipe, the second end of the first collecting pipe is connected to the near top of the reactor, the first air filter is provided on the first steam conveying pipe, the fourth valve is located between the first air filter and the first end of the first collecting pipe, the second air filter is provided on the air conveying pipe, the fifth valve is located between the second air filter and the first end of the first collecting pipe, the third air filter is provided on the first collecting pipe, and the tenth valve is located between the third air filter and the second end of the first collecting pipe.

[0011] In a feasible embodiment, it also includes a second collecting pipe and an eleventh valve arranged on the second collecting pipe, the first end of the second collecting pipe is respectively connected to the cooling water delivery pipe, the second steam delivery pipe and the constant temperature water delivery pipe, and the second end of the second collecting pipe is connected to the water device.

[0012] In a feasible embodiment, the first air filter, the second air filter and the third air filter each include a capsule-shaped shell, a cylindrical filter membrane arranged in the capsule-shaped shell and an inlet pipe, and an inlet and an outlet are respectively provided on both sides of the capsule-shaped shell, and the inlet pipe is respectively connected to the inlet and the bottom of the cylindrical filter membrane.

[0013] In a feasible embodiment, the capsule-shaped shell is composed of two semi-cylindrical shells, and the two semi-cylindrical shells are detachably connected.

[0014] In a feasible embodiment, the reactor includes a cylinder and a cover, the cover is arranged to cover the top opening of the cylinder, the exhaust pipe and the sewage conveying pipe are both connected to the cover, and an observation window is provided on the cover.

[0015] In a feasible embodiment, it further includes a third steam delivery pipe, a twelfth valve provided on the third steam delivery pipe, a third collecting pipe and a thirteenth valve provided on the third collecting pipe, wherein the first end of the third collecting pipe is respectively connected to the drain pipe and the third steam delivery pipe, and the second end of the third collecting pipe is connected to the bottom of the reactor.

[0016] In a feasible embodiment, an agitator is further included, which includes a rotary motor, a stirring rod and blades. The first end of the stirring rod is connected to the rotary motor, the second end of the stirring rod is sealed and inserted into the reactor through the cover body and extends to the bottom of the reactor. The blades are connected to the stirring rod located in the reactor, and the controller is connected to the rotary motor.

[0017] The present application provides a controllable denitrification system for treating aquaculture tail water, comprising: a reactor, an exhaust pipe, a first valve, a drain pipe, a second valve, a sewage conveying pipe, a first steam conveying pipe, an air conveying pipe, a third valve, a fourth valve, a fifth valve, a temperature sensor, a heating component and a controller; the top of the reactor is connected to the exhaust pipe, on which the first valve is provided, the bottom of the reactor is connected to the drain pipe, on which the second valve is provided, the sewage conveying pipe, the first steam conveying pipe and the air conveying pipe are all connected to the reactor, the sewage conveying pipe is provided with a third valve, the first steam conveying pipe is provided with a fourth valve, the air conveying pipe is provided with a fifth valve, the temperature sensor is provided in the reactor, the heating component is provided on the outer peripheral surface of the reactor for heating the reactor, and the controller is respectively connected to the heating component and the temperature sensor. The sewage in the reactor can be sterilized with high-temperature steam by conveying steam through the first steam conveying pipe and heating the reactor by using the heating component. After the sewage is cooled, heterotrophic nitrification-aerobic denitrification bacterial strains are added. The opening degree of the third valve on the sewage conveying pipe and the opening degree of the fifth valve on the air conveying pipe are regulated to control the aeration amount in the reactor. The temperature in the reactor is controlled by using the heating component, thereby providing suitable temperature and aeration amount for the growth of heterotrophic nitrification-aerobic denitrification bacteria, allowing the heterotrophic nitrification-aerobic denitrification bacteria in the reactor to occupy a good ecological niche and improve the sewage denitrification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A structural diagram of the first controllable denitrification system for treating aquaculture tailwater provided in an embodiment of the present application;

[0020] Figure 2 A structural diagram of a second controllable denitrification system for treating aquaculture tailwater provided in an embodiment of the present application;

[0021] Figure 3 A structural diagram of a third controllable denitrification system for treating aquaculture tailwater provided in an embodiment of the present application;

[0022] The accompanying drawings are marked as follows: 1-reactor, 2-exhaust pipe, 3-first valve, 4-drain pipe, 5-second valve, 6-sewage pipe, 7-first steam pipe, 8-air pipe, 9-third valve, 10-fourth valve, 11-fifth valve, 12-controller, 13-water collector, 14-constant temperature water pipe, 15-sixth valve, 16-drain exhaust pipe, 17-seventh valve, 18-cooling water pipe, 19-eighth valve, 20-second steam pipe, 21-ninth valve, 22-first collecting pipe, 23-tenth valve, 24-first air filter, 25-second air filter, 26-third air filter, 27-second collecting pipe, 28-eleventh valve, 29-observation window, 30-agitator, 31-third steam pipe, 32-twelfth valve, 33-third collecting pipe, 34-thirteenth valve. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] The core of this application is to provide a controllable denitrification system for treating aquaculture tail water, which is used to enable heterotrophic nitrification-aerobic denitrification bacteria in the reactor to occupy a good ecological niche and improve the denitrification effect of sewage.

[0025] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Figure 1 A structural diagram of the first controllable denitrification system for treating aquaculture tailwater provided in an embodiment of the present application; Figure 2 The structural diagram of the second controllable denitrification system for treating aquaculture tail water provided in the embodiment of the present application is as follows: Figure 1 and Figure 2As shown, the controllable denitrification system includes a reactor, an exhaust pipe, a first valve, a drain pipe, a second valve, a sewage pipe, a first steam pipe, an air pipe, a third valve, a fourth valve, a fifth valve, a temperature sensor, a heating component and a controller; the top of the reactor is connected to the exhaust pipe, on which a first valve is provided, the bottom of the reactor is connected to the drain pipe, on which a second valve is provided, the sewage pipe, the first steam pipe and the air pipe are all connected to the reactor, the sewage pipe is provided with a third valve, the first steam pipe is provided with a fourth valve, the air pipe is provided with a fifth valve, the temperature sensor is provided in the reactor, the heating component is provided on the outer peripheral surface of the reactor for heating the reactor, and the controller is respectively connected to the heating component and the temperature sensor.

[0027] The shape and size of the reactor 1 are not specifically limited in this embodiment. Figure 2As shown, the reactor 1 can include a cylindrical barrel and a circular truncated cone barrel connected integrally, the top of the circular truncated cone barrel is connected to the bottom of the cylindrical barrel, the drain pipe 4 is connected to the bottom of the circular truncated cone barrel, and the diameter of the circular truncated cone barrel gradually decreases from the top to the bottom. The reactor 1 includes a cylindrical barrel and a circular truncated cone barrel connected integrally, and the design purpose is that: the design of the circular truncated cone barrel can avoid deposition and coking in the reactor 1; the design of the drain pipe 4 at the bottom of the circular truncated cone barrel facilitates the discharge and cleaning of the material, and reduces the difficulty and cost of maintenance. The sewage conveying pipe 6 in the embodiment of the application is used to convey sewage into the reactor 1, the first steam conveying pipe 7 is used to convey air into the reactor 1, and the air conveying pipe 8 is used to convey air into the reactor 1. The heating assembly in the embodiment of the application is not specifically limited, and can adopt electric heating and steam heating and the like. The purpose of conveying steam into the reactor 1 in the embodiment of the application is to sterilize the sewage, the reactor 1, various pipelines, various valves and the air filter in the following text; the purpose of conveying air into the reactor 1 is to provide oxygen, and the aeration amount in the reactor 1 is adjusted by adjusting the opening degree of the fifth valve 11 on the air conveying pipe 8; the heating assembly is controlled to adjust the temperature in the reactor 1. In summary, the heterotrophic nitrification-aerobic denitrification bacteria are put into the sewage after sterilization and cooling, and then the temperature and the aeration amount in the reactor 1 are controlled, so that the heterotrophic nitrification-aerobic denitrification bacteria in the reactor 1 occupy a good ecological niche, and the denitrification effect of the sewage is improved. The first valve 3, the second valve 5, the third valve 9, the fourth valve 10 and the fifth valve 11 in the embodiment of the application can be manual valves, or can adopt electric valves, and if electric valves are adopted, the electric valves can be connected with the controller 12. Of course, a PH sensor and a pressure sensor connected with the controller 12 can also be arranged on the reactor 1. A display screen connected with the controller 12 can also be included, and the temperature, the aeration amount, the pressure and the PH value (hydrogen ion concentration index) in the reactor 1 are displayed on the display screen. Flowmeters can also be arranged on various pipelines (the exhaust pipe 2, the drain pipe 4, the sewage conveying pipe 6, the first steam conveying pipe 7 and the air conveying pipe 8).

[0028] A controllable denitrification system for treating aquaculture tail water provided in an embodiment of the present application includes: a reactor 1, an exhaust pipe 2, a first valve 3, a drain pipe 4, a second valve 5, a sewage conveying pipe 6, a first steam conveying pipe 7, an air conveying pipe 8, a third valve 9, a fourth valve 10, a fifth valve 11, a temperature sensor, a heating component and a controller 12; the top of the reactor 1 is connected to the exhaust pipe 2, on which the first valve 3 is provided, the bottom of the reactor 1 is connected to the drain pipe 4, on which the second valve 5 is provided, the sewage conveying pipe 6, the first steam conveying pipe 7 and the air conveying pipe 8 are all connected to the reactor 1, the sewage conveying pipe 6 is provided with a third valve 9, the first steam conveying pipe 7 is provided with a fourth valve 10, and the air conveying pipe 8 is provided with a fifth valve 11, the temperature sensor is provided in the reactor 1, the heating component is provided on the outer peripheral surface of the reactor 1 for heating the reactor 1, and the controller 12 is respectively connected to the heating component and the temperature sensor. By delivering steam through the first steam delivery pipe 7 and heating the reactor 1 using the heating component, the sewage in the reactor 1 can be sterilized with high-temperature steam. After the sewage is cooled, heterotrophic nitrification-aerobic denitrification bacteria strains are added. The opening of the third valve 9 on the sewage delivery pipe 6 and the opening of the fifth valve 11 on the air delivery pipe 8 are regulated to control the aeration volume in the reactor 1, and the temperature in the reactor 1 is controlled using the heating component to provide a suitable temperature and aeration volume for the growth of heterotrophic nitrification-aerobic denitrification bacteria, so that the heterotrophic nitrification-aerobic denitrification bacteria in the reactor 1 occupy a good ecological niche, thereby improving the sewage denitrification effect.

[0029] Based on the above embodiments, the heating component of the embodiment of the present application includes a water container 13, a constant temperature water delivery pipe 14, a sixth valve 15, a drainage and exhaust pipe 16 and a seventh valve 17. The reactor 1 is arranged in the water container 13. The top opening edge of the water container 13 is sealedly connected to the outer peripheral surface near the top of the reactor 1. The bottom opening edge of the water container 13 is sealedly connected to the outer peripheral surface of the drain pipe 4. A hollow interlayer is formed between the inner wall of the water container 13 and the outer wall of the reactor 1. The constant temperature water delivery pipe 14 and the drainage and exhaust pipe 16 are both connected to the water container 13. The constant temperature water delivery pipe 14 is used to deliver constant temperature water to the hollow interlayer. The sixth valve 15 is arranged on the constant temperature water input pipe, and the seventh valve 17 is arranged on the drainage and exhaust pipe 16.

[0030] In the embodiment of the present application, constant temperature water is delivered to the hollow interlayer so that the temperature in the reactor 1 meets the growth requirements of heterotrophic nitrification-aerobic denitrification bacteria. The opening of the sixth valve 15 on the constant temperature water delivery pipe 14 and the opening of the seventh valve 17 on the drainage and exhaust pipe 16 can be adjusted according to the temperature detected by the temperature sensor to maintain the temperature required for the growth of heterotrophic nitrification-aerobic denitrification bacteria. The embodiment of the present application does not limit the shape and size of the water container 13. Figure 2 As shown, the water container 13 can be configured to be cylindrical.

[0031] Based on the above embodiments, the embodiments of the present application also include a cooling water delivery pipe 18, an eighth valve 19 provided on the cooling water delivery pipe 18, a second steam delivery pipe 20 and a ninth valve 21 provided on the second steam delivery pipe 20. The cooling water delivery pipe 18 and the second steam delivery pipe 20 are both connected to the water reservoir 13. The cooling water delivery pipe 18 is used to input cooling water into the hollow interlayer, and the steam delivery pipe is used to deliver steam to the hollow interlayer.

[0032] In this embodiment, a second steam delivery pipe 20 is provided to deliver steam to the hollow interlayer. This steam can be used to sterilize the water reservoir 13 and also to heat the reactor 1. After steam sterilization in the water reservoir 13, the temperature of the reactor 1 is very high and needs to be cooled before the heterotrophic nitrifying-aerobic denitrifying bacteria are introduced into the reactor 1. If the natural cooling rate is particularly slow, the cooling rate of the reactor 1 can be increased by providing a cooling water delivery pipe 18 to deliver cooling water to the hollow interlayer.

[0033] Based on the above embodiment, the embodiment of the present application also includes a first manifold 22, a tenth valve 23 provided on the first manifold 22, a first air filter 24, a second air filter 25 and a third air filter 26. The first end of the first manifold 22 is respectively connected to the first steam delivery pipe 7 and the air delivery pipe 8, the second end of the first manifold 22 is connected to the near top of the reactor 1, the first air filter 24 is provided on the first steam delivery pipe 7, the fourth valve 10 is located between the first air filter 24 and the first end of the first manifold 22, the second air filter 25 is provided on the air delivery pipe 8, the fifth valve 11 is located between the second air filter 25 and the first end of the first manifold 22, the third air filter 26 is provided on the first manifold 22, and the tenth valve 23 is located between the third air filter 26 and the second end of the first manifold 22.

[0034] The embodiment of the present application is connected to the reactor 1 through the first collecting pipe 22, which can avoid the first steam delivery pipe 7 and the air delivery pipe 8 being connected to the reactor 1 separately. The first collecting pipe 22 reduces the number of interfaces on the reactor 1, helps to reduce the manufacturing cost of the pipeline and the interface, and reduces the potential leakage risk of the reactor 1. The steam can be filtered by the first air filter 24, and the air can be filtered by the second air filter 25 to prevent microorganisms in the steam and air from entering the reactor 1 and affecting the heterotrophic nitrification-aerobic denitrification bacteria from occupying the ecological niche. Furthermore, a third air filter 26 is also provided in the first collecting pipe 22 to further improve the filtering effect.

[0035] Based on the above embodiments, the embodiments of the present application also include a second collecting pipe 27 and an eleventh valve 28 arranged on the second collecting pipe 27. The first end of the second collecting pipe 27 is respectively connected to the cooling water delivery pipe 18, the second steam delivery pipe 20 and the constant temperature water delivery pipe 14, and the second end of the second collecting pipe 27 is connected to the water reservoir 13.

[0036] In the embodiment of the present application, a second collecting pipe 27 is provided to connect to the water trap 13 , thereby avoiding the cooling water delivery pipe 18 and the second steam delivery pipe 20 being connected to the water trap 13 separately, thereby reducing the number of interfaces of the water trap 13 and reducing the risk of leakage of the water trap 13 .

[0037] Based on the above embodiments, the first air filter 24, the second air filter 25 and the third air filter 26 of the embodiments of the present application all include a capsule-shaped shell, a cylindrical filter membrane and an inlet tube arranged in the capsule-shaped shell. An inlet and an outlet are respectively provided on both sides of the capsule-shaped shell, and the inlet tubes are respectively connected to the inlet and the bottom of the cylindrical filter membrane.

[0038] In the embodiment of the present application, the capsule-shaped housing can be composed of two semi-cylindrical housings, and the two semi-cylindrical housings are detachably connected. The capsule-shaped housing is designed as two detachably connected semi-cylindrical housings, which facilitates cleaning and replacement of the cylindrical filter membrane within the capsule housing. The two semi-cylindrical housings can be threadedly connected. Taking the second air filter 25 on the air delivery pipe 8 as an example, the inlet and outlet on both sides of the capsule-shaped housing are connected to the air delivery pipe 8. Air enters the capsule-shaped housing through the inlet on the capsule-shaped housing and enters the cylindrical filter membrane from the bottom of the cylindrical filter membrane. The filtered air flows out of the cylindrical filter membrane and flows into the air delivery pipe 8 through the outlet on the capsule-shaped housing.

[0039] Based on the above embodiments, Figure 2 As shown, the reactor 1 of the embodiment of the present application includes a cylinder and a cover. The cover covers the top opening of the cylinder. The exhaust pipe 2 and the sewage conveying pipe 6 are both connected to the cover, and an observation window 29 is provided on the cover.

[0040] The cover of the present application can be connected to the cylinder by a thread, or one side of the cover can be hinged to the cylinder by a hinge or a rotating shaft, and a locking mechanism such as a tongue lock is provided on the other side of the cover to lock the cover and the cylinder. By providing an observation window 29 on the cover, it is convenient for staff to understand the situation inside the reactor 1.

[0041] Based on the above embodiments, the embodiments of the present application also include an agitator 30, which includes a rotating motor, a stirring rod and blades. The first end of the stirring rod is connected to the rotating motor, and the second end of the stirring rod is inserted into the reactor 1 through the cover body seal and extends to the near bottom of the reactor 1. The blades are connected to the stirring rod located in the reactor 1, and the controller 12 is connected to the rotating motor.

[0042] In the embodiment of the present application, the agitator 30 can increase the gas-liquid contact area, thereby improving the oxygen transfer coefficient. The stirring process helps to increase the dissolved oxygen level. The stirring of the agitator 30 and the aeration rate will jointly affect the dissolved oxygen level in the reactor 1 to meet the requirements of the denitrification reaction.

[0043] Based on the above embodiments, Figure 3 The structural diagram of the third controllable denitrification system for treating aquaculture tail water provided in the embodiment of the present application is as follows: Figure 3 As shown, the embodiment of the present application also includes a third steam delivery pipe 31, a twelfth valve 32 provided on the third steam delivery pipe 31, a third collecting pipe 33 and a thirteenth valve 34 provided on the third collecting pipe 33, the first end of the third collecting pipe 33 is connected to the drain pipe 4 and the third steam delivery pipe 31 respectively, and the second end of the third collecting pipe 33 is connected to the bottom of the reactor 1.

[0044] In the embodiment of the present application, a third steam delivery pipe 31 is connected to the bottom of the reactor 1 through a third collecting pipe 33. The third steam delivery pipe 31 can be used to deliver steam to the reactor 1 for sterilization. The first steam delivery pipe 7 and the third steam delivery pipe 31 can sterilize the first air filter 24 and the third air filter 26 on both sides, thereby avoiding the retention of a large number of microorganisms on the filter membrane of the air filter.

[0045] To further understand the present application, the following describes a method for using a controllable denitrification system for treating aquaculture tailwater.

[0046] Use the first steam delivery pipe 7 and the second steam delivery pipe 20 to deliver steam to sterilize the air filter, reactor 1, water container 13, each pipe and each valve, control the temperature of the reactor 1 between 121 ° C ~ 125 ° C, and the pressure between 0.11 MPa ~ 0.15 MPa for 30 minutes; add sewage, use the second steam delivery pipe 20 to deliver steam to the water container 13, and the first steam delivery pipe 7 to deliver steam to the reactor 1 to disinfect the sewage, control the temperature between 121 ° C ~ 125 ° C, and the pressure between 0.11 MPa ~ 0.15 MPa. MP, sterilize for 30 minutes to fully sterilize the sewage in the reactor 1; open the eighth valve 19 on the cooling water delivery pipe 18 to use cooling water to cool the reactor 1 from the outside; after cooling, add the cultured heterotrophic nitrification-aerobic denitrification bacterial strain, use the constant temperature water delivery pipe 14 to deliver constant temperature water to the water reservoir 13, control the temperature in the reactor 1 to 30°C, adjust the opening of the fifth valve 11 on the air delivery pipe 8 and the speed of the stirrer 30 to control the aeration volume in the reactor 1 to 4 m 3 / h / 100L, thereby cultivating heterotrophic nitrification-aerobic denitrification bacteria. Use the drain pipe 4 to collect water samples from the reactor 1, test the ammonia nitrogen concentration, nitrate nitrogen concentration and nitrite nitrogen concentration in the water sample, and draw a growth curve of the strain denitrification process.

[0047] The above is a detailed introduction to a controllable denitrification system for treating aquaculture tailwater provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0048] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

Claims

1. A controllable denitrification system for treating aquaculture tail water, characterized in that: include: Reactor (1), exhaust pipe (2), first valve (3), drain pipe (4), second valve (5), sewage delivery pipe (6), first steam delivery pipe (7), air delivery pipe (8), third valve (9), fourth valve (10), fifth valve (11), temperature sensor, heating assembly and controller (12); The top of the reactor (1) is connected to an exhaust pipe (2), and a first valve (3) is provided on the exhaust pipe (2). The bottom of the reactor (1) is connected to a drain pipe (4), and a second valve (5) is provided on the drain pipe (4). The sewage conveying pipe (6), the first steam conveying pipe (7) and the air conveying pipe (8) are all connected to the reactor (1). The sewage conveying pipe (6) is provided with the third valve (9), the first steam conveying pipe (7) is provided with the fourth valve (10), and the air conveying pipe (8) is provided with the fifth valve (11). The temperature sensor is provided in the reactor (1), and the heating component is provided on the outer peripheral surface of the reactor (1) for heating the reactor (1). The controller (12) is connected to the heating component and the temperature sensor respectively.

2. The controllable denitrification system for treating aquaculture tail water according to claim 1, characterized in that: The heating assembly includes a water container (13), a constant temperature water delivery pipe (14), a sixth valve (15), a drainage and exhaust pipe (16) and a seventh valve (17). The reactor (1) is arranged in the water container (13). The top opening edge of the water container (13) is sealedly connected to the outer peripheral surface of the reactor (1) near the top. The bottom opening edge of the water container (13) is sealedly connected to the outer peripheral surface of the drainage pipe (4). A hollow interlayer is formed between the inner wall of the water container (13) and the outer wall of the reactor (1). The constant temperature water delivery pipe (14) and the drainage and exhaust pipe (16) are both connected to the water container (13). The constant temperature water delivery pipe (14) is used to deliver constant temperature water to the hollow interlayer. The sixth valve (15) is arranged on the constant temperature water input pipe, and the seventh valve (17) is arranged on the drainage and exhaust pipe (16).

3. The controllable denitrification system for treating aquaculture tail water according to claim 2, characterized in that: The device further comprises a cooling water delivery pipe (18), an eighth valve (19) provided on the cooling water delivery pipe (18), a second steam delivery pipe (20), and a ninth valve (21) provided on the second steam delivery pipe (20). The cooling water delivery pipe (18) and the second steam delivery pipe (20) are both connected to the water reservoir (13). The cooling water delivery pipe (18) is used to input cooling water to the hollow interlayer, and the steam delivery pipe is used to transport steam to the hollow interlayer.

4. The controllable denitrification system for treating aquaculture tail water according to claim 1, characterized in that: The reactor further comprises a first collecting pipe (22), a tenth valve (23) provided on the first collecting pipe (22), a first air filter (24), a second air filter (25) and a third air filter (26), wherein the first end of the first collecting pipe (22) is connected to the first steam delivery pipe (7) and the air delivery pipe (8) respectively, the second end of the first collecting pipe (22) is connected to the near top of the reactor (1), the first air filter (24) is provided on the first steam delivery pipe (7), the fourth valve (10) is located between the first air filter (24) and the first end of the first collecting pipe (22), the second air filter (25) is provided on the air delivery pipe (8), the fifth valve (11) is located between the second air filter (25) and the first end of the first collecting pipe (22), the third air filter (26) is provided on the first collecting pipe (22), and the tenth valve (23) is located between the third air filter (26) and the second end of the first collecting pipe (22).

5. The controllable denitrification system for treating aquaculture tail water according to claim 3, characterized in that: The invention also includes a second collecting pipe (27) and an eleventh valve (28) provided on the second collecting pipe (27), wherein the first end of the second collecting pipe (27) is respectively connected to the cooling water delivery pipe (18), the second steam delivery pipe (20) and the constant temperature water delivery pipe (14), and the second end of the second collecting pipe (27) is connected to the water reservoir (13).

6. The controllable denitrification system for treating aquaculture tail water according to claim 4, characterized in that: The first air filter (24), the second air filter (25) and the third air filter (26) each comprise a capsule-shaped shell, a cylindrical filter membrane arranged in the capsule-shaped shell and an inlet pipe, wherein an inlet and an outlet are respectively provided on both sides of the capsule-shaped shell, and the inlet pipe is respectively connected to the inlet and the bottom of the cylindrical filter membrane.

7. The controllable denitrification system for treating aquaculture tail water according to claim 6, characterized in that: The capsule-shaped shell is composed of two semi-cylindrical shells, and the two semi-cylindrical shells are detachably connected.

8. The controllable denitrification system for treating aquaculture tail water according to claim 1, characterized in that: The reactor (1) comprises a cylinder and a cover, wherein the cover is arranged to cover the top opening of the cylinder, the exhaust pipe (2) and the sewage conveying pipe (6) are both connected to the cover, and an observation window (29) is provided on the cover.

9. The controllable denitrification system for treating aquaculture tail water according to claim 4, characterized in that: The invention also includes a third steam delivery pipe (31), a twelfth valve (32) provided on the third steam delivery pipe (31), a third collecting pipe (33), and a thirteenth valve (34) provided on the third collecting pipe (33), wherein the first end of the third collecting pipe (33) is connected to the drain pipe (4) and the third steam delivery pipe (31), respectively, and the second end of the third collecting pipe (33) is connected to the bottom of the reactor (1).

10. The controllable denitrification system for treating aquaculture tail water according to claim 8, characterized in that: The invention also includes an agitator (30), wherein the agitator (30) includes a rotary motor, a stirring rod and blades, wherein the first end of the stirring rod is connected to the rotary motor, the second end of the stirring rod is inserted into the reactor (1) through the cover body seal and extends to the bottom of the reactor (1), the blades are connected to the stirring rod located in the reactor (1), and the controller (12) is connected to the rotary motor.

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