Method for enhancing nitrification and denitrification effect in aquaculture water microbial purifier

Abstract

The present application relates to a kind of water aquaculture water microbial purifier in the method for enhancing nitrification denitrification effect, the working time period of water aquaculture water microbial purifier is divided into nitrification time period and denitrification time period, effectively utilize the sludge mixed solution in the bottom of biological packing, not only can improve the utilization of equipment, realize nitrification denitrification complete process, also can reduce equipment space occupation;Under nitrification time period, biological packing is in aerobic environment, and aerobic microorganism can carry out normal nitrification reaction, reduce the ammonia content in biological packing;And under denitrification time period, the sludge mixed solution in the bottom of purifier is introduced into biological packing and released, reduce the oxygen content in biological packing, anaerobic microorganism can carry out cultivation and denitrification degradation reaction in this environment, and sludge mixed solution can supplement necessary carbon source for denitrification reaction, provide compensation function for guaranteeing denitrification process, strengthen sufficient nitrification denitrification effect.

Description

Technical Field

[0001] This invention relates to a water treatment method, and more particularly to a method for enhancing nitrification and denitrification effects in a microbial purifier for aquaculture water. Background Technology

[0002] In artificial aquaculture, factors such as feed input, aquatic animal excrement, drug residues, and pathogen transmission cause cross-contamination of aquaculture water, especially wastewater. This affects the survival and growth of aquatic animals, shortens the water use cycle, and can even lead to water shortages. Currently, the purification of aquaculture water remains a complex and difficult problem to solve effectively. Current treatment methods mainly rely on traditional technologies such as tiered physical filtration, drug treatment, and plant adsorption, which are insufficient to meet the water quality requirements and discharge standards for aquaculture water. Furthermore, these methods cannot avoid problems such as complex equipment structures, large land occupation (generally requiring 4-5 treatment ponds), and difficult construction. Based on these considerations, adopting a water purification device that uses microbial treatment methods, requires less land, allows for convenient application and simple operation, and effectively treats aquaculture water, while continuously upgrading and enhancing the treatment capabilities of water purifiers, is essential for promoting technological innovation in aquaculture water treatment.

[0003] As a water purifier for aquaculture, its innovative design features include: requiring the equipment to be as refined and simple as possible while possessing sufficient purification capabilities to significantly reduce the high costs associated with traditional treatment processes, such as capital and labor expenditures; and requiring a high degree of organic integration of traditional segmented and complex treatment processes, successfully completing the entire nitrification and denitrification process within the same reactor chamber to achieve organic degradation and purification of water quality. However, the presence of organic matter in the nitrification and denitrification processes is contradictory, as are the requirements for the carbon source supply in the reaction process, and the requirements for oxygen-rich and oxygen-deficient environments.

[0004] Because the cultivation, acclimatization, and nitrification reactions of microorganisms in the reactor all occur in an environment with relatively abundant oxygen but lacking carbon sources, the growth activity of anaerobic bacteria is inhibited, and the denitrification reaction is severely hindered. The entire nitrification-denitrification organic degradation process is thus disrupted to some extent. Under normal circumstances, denitrifying bacteria can only carry out denitrification after consuming the oxygen carried by the internal reflux. Therefore, this oxygen also requires the consumption of carbon sources. Thus, the insufficiency of denitrifying bacteria and carbon sources becomes a limiting factor for the complete nitrification-denitrification reaction. Increasing the biomass of anaerobic bacteria and the necessary carbon sources becomes the key element in overcoming this technical shortcoming.

[0005] Therefore, currently, denitrification is usually handled as a separate treatment unit, placed alongside and connected to the aquaculture water purifier to treat the aquaculture water. This method is space-consuming and cumbersome to operate. If a purifier could perform both nitrification and denitrification reactions on aquaculture water, it would undoubtedly improve the purifier's utilization rate and significantly reduce the space required for the equipment. Summary of the Invention

[0006] The problem this invention aims to solve is to provide a method for enhancing nitrification and denitrification effects in a microbial purifier for aquaculture water. This method utilizes the sediment mixture at the bottom of the purifier to switch between nitrification and denitrification reactions within the same purifier, improving equipment utilization and reducing space requirements. The technical solution adopted is as follows:

[0007] A method for enhancing nitrification and denitrification effects in a microbial purifier for aquaculture water, characterized by comprising the following steps:

[0008] (1) Fill the biological packing chamber of the aquaculture water microbial purifier with microbial packing material, and cultivate and proliferate aerobic or anaerobic microorganisms in different time periods to form oxygen-rich or oxygen-deficient conditions respectively.

[0009] (2) The water inlet device introduces aquaculture water into the biological packing chamber;

[0010] (3) Close the sediment diversion device and open the oxygen supply device. The oxygen supply device supplies oxygen to the biological packing chamber, so that the biological packing chamber is in an aerobic environment. At this time, the aquaculture water microbial purifier is in the nitrification period. The aerobic microorganisms in the biological packing chamber carry out nitrification reaction, reducing the ammonia content in the biological packing chamber.

[0011] (4) After a certain period of time, the oxygen supply device is turned off and the closed sediment diversion device is turned on. The sediment mixture at the bottom of the biological packing chamber is diverted to the biological packing chamber through the sediment diversion device. At this time, the aquaculture water microbial purifier is in the denitrification period, the biological packing chamber is in an anaerobic environment, and the anaerobic microorganisms in the biological packing chamber carry out denitrification reaction to reduce the nitrogen content in the biological packing chamber.

[0012] (5) The purified aquaculture water is transported to the aquaculture pond for recycling and reuse.

[0013] (6) Alternate between steps (3) and (4) until the aquaculture water meets the requirements for healthy aquaculture water. Then, introduce the bottom water of the aquaculture pond into the purifier for end-of-pipe denitrification and efficiency enhancement treatment, and discharge it as tailwater.

[0014] The aforementioned water intake device typically includes an inlet pipe and an inlet pump. The inlet pump pumps the aquaculture water from the aquaculture pond into the biological packing chamber through the inlet pipe, where the abundant dominant microorganisms cultivated in the biological packing purify the aquaculture water.

[0015] The aforementioned oxygen supply device typically includes an oxygen pump, an oxygen delivery pipe, and an air distribution plate. The air distribution plate is located at the bottom of the biological packing chamber. The outlet of the oxygen delivery pipe extends into the biological packing chamber and is connected to the inlet of the air distribution plate. Oxygen is delivered to the biological packing chamber through the oxygen delivery pipe and the air distribution plate.

[0016] The aforementioned sediment diversion device is used to extract the sediment mixture from the bottom layer of the aquaculture water microbial purifier and then return it to the biological packing chamber for spraying. Currently, the test results show that due to the high pollution concentration of the sediment mixture at the bottom layer, its oxidation-reduction potential reaches -85mv. As a manifestation of electron transfer and metabolic changes in the form of matter during microbial metabolism under anaerobic conditions, oxidation-reduction potential is an important parameter of the anaerobic reaction process. It can assess the anaerobic environment and measure the activity of anaerobic bacteria, creating an anaerobic environment for denitrification.

[0017] The aforementioned aquaculture water microbial purifiers typically include a control device for automatically or manually controlling the purifier's water inlet, drainage, oxygen supply, and sediment diversion; the control device generally uses a PLC controller, microcontroller, or microprocessor.

[0018] Steps (3) and (4) divide the working period of the aquaculture water microbial purifier into nitrification period and denitrification period, effectively utilizing the sediment mixture at the bottom of the biological packing chamber. This not only improves the utilization rate of the equipment and realizes the complete process of nitrification and denitrification, but also reduces the space occupied by the equipment. During the nitrification phase, the sediment diversion device is turned off, and the oxygen supply device provides normal oxygen to the biological packing chamber, creating an aerobic environment that inhibits the activity of anaerobic microorganisms. Aerobic microorganisms can then carry out normal nitrification, converting ammonia nitrogen into nitrite and nitrate nitrogen, thus reducing the ammonia content in the biological packing chamber. During the denitrification phase, the oxygen supply device is turned off, and the sediment diversion device introduces the sediment mixture from the bottom of the aquaculture water microbial purifier into the purifier's biological packing chamber and releases it. Because the biological packing chamber is in an oxygen-deficient environment, the activity of aerobic microorganisms is inhibited, allowing anaerobic microorganisms to thrive and undergo denitrification degradation. Furthermore, the sediment mixture provides necessary carbon source replenishment for the denitrification reaction, compensating for the denitrification process, enhancing the full nitrification and denitrification effect, and reducing the nitrogen content in the biological packing chamber. This unique and efficient design achieves its intended purpose.

[0019] The time interval in step (4) above can be switched manually or by the control device mentioned above, or it can be switched according to the real-time status of the various indicators of aquaculture water in the biological filler chamber.

[0020] As a preferred embodiment of the present invention, in step (4), when the aquaculture water microbial purifier is in the denitrification period, the sediment mixture is led to the upper part of the biological packing chamber, allowing the sediment mixture to diffuse into the biological packing chamber. When diverting the sediment mixture from the bottom layer of the aquaculture water microbial purifier, the sediment mixture is led to the upper part of the biological packing chamber through the second sediment conveying pipe, allowing the sediment mixture to diffuse into the biological packing chamber, thus creating a more closed anaerobic environment in the biological packing chamber. Under such an anaerobic environment, denitrifying bacteria can undergo secondary proliferation and replenish organic carbon sources, thereby releasing a high concentration of anaerobic bacterial liquid to undergo multiple more thorough mixing reactions with the aquaculture pond effluent, further shortening the total nitrogen treatment time and improving the total nitrogen treatment efficiency.

[0021] As a further preferred embodiment of the present invention, the biological packing chamber is equipped with a balanced liquid distributor; in step (4), when the sediment diversion device diverts the sediment mixture from the bottom of the biological packing chamber into the biological packing chamber, it sprays and releases it in the biological packing chamber through the balanced liquid distributor, so that the sediment mixture forms a swirling water flow in the biological packing chamber, driving the anaerobic microorganisms to rotate. The sediment diversion device extracts the sediment mixture from the bottom of the biological packing chamber and diverts it back, and sprays and releases it through the balanced liquid distributor, so that the sediment mixture is distributed in the biological packing chamber, so that the sediment mixture forms a swirling water flow in the biological packing chamber, accelerating the diffusion of the sediment mixture in the biological packing chamber, thereby accelerating the formation of the anaerobic environment in the biological packing chamber, enhancing the activity of anaerobic microorganisms, and improving the denitrification process of anaerobic microorganisms.

[0022] As a further preferred embodiment of the present invention, the oxygen supply device typically includes an oxygen pump, an oxygen delivery pipe, and an air distribution plate. The air distribution plate is located at the bottom of the biological packing chamber. The outlet of the oxygen delivery pipe extends into the biological packing chamber and is connected to the inlet of the air distribution plate, thus supplying oxygen to the biological packing chamber through the oxygen delivery pipe and the air distribution plate. The biological packing chamber is equipped with an internal circulation infusion device, which includes an internal circulation pump, an internal circulation inlet pipe, an internal circulation delivery pipe, and the equalizing distributor. The internal circulation pump is located at the top of the biological packing chamber. The inlet of the internal circulation inlet pipe is located between the microbial packing and the air distribution plate. The outlet of the internal circulation inlet pipe is connected to the inlet of the internal circulation pump, and the inlet of the internal circulation delivery pipe is connected to the outlet of the internal circulation pump. The equalizing distributor is located below the microbial packing. The liquid inlet of the equalizer is connected to the outlet of the internal circulation infusion pipe. The sludge diversion device includes a sludge diversion pipe, a sludge diversion pump, a first sludge conveying pipe, and a second sludge conveying pipe. The liquid inlet of the sludge diversion pipe is located at the bottom of the biological packing chamber and below the gas distribution plate. The liquid outlet of the sludge diversion pipe is connected to the liquid inlet of the sludge diversion pump. The sludge diversion pump has a first liquid outlet and a second liquid outlet. The liquid inlet of the sludge conveying pipe is connected to the liquid outlet of the sludge diversion pump. The liquid inlet of the first sludge conveying pipe is connected to the first liquid outlet of the sludge diversion pump. The liquid outlet of the first sludge conveying pipe is connected to the internal circulation infusion pipe. The liquid inlet of the second sludge conveying pipe is connected to the second liquid outlet of the sludge diversion pump. The liquid outlet of the second sludge conveying pipe is located at the top of the biological packing chamber.

[0023] The aforementioned internal circulation infusion device is used to extract the aquaculture water from the biological packing chamber, pressurize it, and return it to the biological packing chamber before spraying it out. This causes the aquaculture water to form a swirling water flow in the biological packing chamber, which drives the microbial packing to rotate, thereby enhancing the activity of microorganisms and increasing the nitrification rate of the aquaculture water.

[0024] In one specific embodiment, a three-way valve can be installed on the internal circulation infusion pipe. The first inlet and outlet of the three-way valve are connected to the internal circulation infusion pipe, and the second inlet of the three-way valve is connected to the outlet of the sediment conveying pipe. Depending on the time period of the biological packing chamber, the opening and closing of the two inlets of the three-way valve can be controlled by a control device to appropriately divert the liquid.

[0025] As a preferred embodiment of the present invention, in step (6), when the bottom water of the aquaculture pond is discharged as tailwater, the bottom water of the aquaculture pond is led to the total nitrogen treatment enhancement device set at the tailwater discharge end of the aquaculture water microbial purifier; the total nitrogen treatment enhancement device is provided with an anaerobic bacteria proliferation chamber and multiple mixing reaction chambers connected in sequence, and the anaerobic bacteria proliferation chamber and multiple mixing reaction chambers are all fully enclosed structures; the anaerobic bacteria proliferation chamber is filled with biological packing material for proliferating anaerobic microorganisms, the anaerobic bacteria proliferation chamber introduces the sediment mixture from the bottom of the biological packing chamber, the tailwater is introduced into the first mixing reaction chamber, the sediment mixture undergoes secondary denitrification in the anaerobic bacteria proliferation chamber, and then continuously mixes and reacts with the tailwater in multiple mixing reaction chambers.

[0026] The anaerobic bacteria proliferation chamber is filled with biological packing material for the proliferation of denitrifying bacteria. An anaerobic liquid inlet pipe introduces the sediment mixture from the bottom of the aquaculture water purifier as a supplementary organic carbon source, enhancing the biomass of denitrifying bacteria and providing a supplementary composite carbon source for the denitrification reaction. In a fully enclosed, anoxic environment, the denitrifying bacteria proliferate and their activity is enhanced by the supplemented organic carbon source. Utilizing nitrates or nitrites as electron acceptors, they reduce them to nitrogen gas through respiration and release a high concentration of anaerobic bacterial liquid, which undergoes multiple thorough mixing reactions with the aquaculture pond effluent. During this process, the organic matter in the sediment mixture acts as an electron donor, nitrates gain electrons and are reduced to nitrogen gas, and the organic matter is oxidized, releasing energy for the denitrifying bacteria. This not only shortens the total nitrogen treatment time but also effectively improves the total nitrogen treatment in the effluent. Since the organic carbon source is derived from the sediment mixture at the bottom of the aquaculture water purifier, and the entire total nitrogen treatment enhancement device is separated by a total nitrogen treatment chamber, it can be installed above the aquaculture water purifier without requiring additional land area.

[0027] The aforementioned multiple mixing reaction chambers are used to carry out multi-stage mixing reactions between the bacterial solution after the anaerobic bacteria proliferation reaction and the tailwater from aquaculture. In a fully enclosed, oxygen-deficient environment, the tailwater and bacterial solution are effectively denitrified after multi-stage mixing reactions, forming effluent that better meets discharge requirements. Furthermore, the multiple mixing reaction chambers are connected in sequence to extend the reaction path, allowing nitrates or nitrites to react fully.

[0028] As a further preferred embodiment of the present invention, the total nitrogen treatment enhancement device includes a tailwater inlet pipe, an anaerobic liquid inlet pipe, a tailwater outlet pipe, and a total nitrogen treatment chamber; the total nitrogen treatment chamber includes a basin and a basin cover, the basin cover being placed on the basin, and multiple partition plates being provided in the basin, the multiple partition plates dividing the basin into one anaerobic bacteria proliferation chamber and multiple mixing reaction chambers; each partition plate has an overflow port or a flow port, the overflow port and the flow port being arranged sequentially at intervals; the outlet of the anaerobic liquid inlet pipe is located at the upper part of the anaerobic bacteria proliferation chamber, the outlet of the tailwater inlet pipe is located at the upper part of the first mixing reaction chamber, and the inlet of the tailwater outlet pipe is located at the upper part of the chamber wall of the last mixing reaction chamber.

[0029] The aforementioned tailwater inlet pipe is connected to the tailwater pump of the aquaculture water microbial purifier, which directs the tailwater to the first mixing reaction chamber.

[0030] The aforementioned anaerobic liquid input pipe is connected to the sediment diversion device of the bottom sediment mixture of the aquaculture water purifier, which diverts the sediment mixture to the anaerobic bacteria proliferation chamber.

[0031] The basin is typically round, but square or other shapes are also possible. Designing the total nitrogen treatment chamber as a basin structure makes it more suitable for placement above the aquaculture water purifier, creating a seamless integration.

[0032] As a further preferred embodiment of the present invention, multiple partition plates are arranged parallel and vertically in the basin, with each overflow port located on the upper part of the corresponding partition plate and each overflow port located on the lower part of the corresponding partition plate; adjacent overflow ports and overflow ports are staggered from each other in the horizontal and vertical directions. To allow the effluent in the mixing reaction chamber more sufficient mixing reaction time, adjacent overflow ports and overflow ports are staggered from each other in the horizontal and vertical directions, so that after the effluent flows from the overflow port / overflow port of the anaerobic bacteria proliferation chamber / previous mixing reaction chamber into the current mixing reaction chamber, it has a certain amount of time to mix and react before flowing from the overflow port of the current mixing reaction chamber to the next mixing reaction chamber.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] This invention relates to a method for enhancing nitrification and denitrification effects in a microbial purifier for aquaculture water. The method divides the purifier's operating time into nitrification and denitrification periods, effectively utilizing the sediment mixture at the bottom of the biological packing chamber. This not only improves equipment utilization and ensures a complete nitrification and denitrification process but also reduces equipment space requirements. During the nitrification period, the biological packing chamber operates in an aerobic environment, inhibiting the activity of anaerobic microorganisms. Aerobic microorganisms can then carry out normal nitrification, reducing the ammonia content in the biological packing chamber. During the denitrification period, the sediment mixture at the bottom of the aquaculture water microbial purifier is introduced into and released into the biological packing chamber. Because the biological packing chamber operates in an anaerobic environment, the activity of aerobic microorganisms is inhibited, allowing anaerobic microorganisms to cultivate and denitrify in this environment. Furthermore, the sediment mixture provides necessary carbon source replenishment for the denitrification reaction, compensating for the denitrification process, enhancing the full nitrification and denitrification effects, and reducing the nitrogen content in the biological packing chamber. This unique and efficient design achieves its intended purpose. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the aquaculture water microbial purifier and the total nitrogen treatment efficiency enhancement device in a preferred embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the internal structure of the total nitrogen treatment enhancement device in a preferred embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram illustrating the principle of a preferred embodiment of the present invention;

[0038] The labels are as follows: 1-Biological packing chamber, 101-Microbial packing; 2-Water inlet device, 201-Water inlet pipe, 202-Water inlet pump; 3-Tailwater conveying device, 301-Tailwater pumping pipe, 302-Tailwater conveying pump, 303-Tailwater input pipe; 4-Oxygen supply device, 401-Oxygen supply pump, 402-Oxygen delivery pipe, 403-Aeration plate; 5-Internal circulation infusion device, 501-Internal circulation pump, 502-Internal circulation inlet pipe, 503-Internal circulation infusion pipe, 504- 6-Equalizing liquid distributor; 6-Sludge diversion device; 601-Sludge diversion pipe; 602-Sludge diversion pump; 603-First sludge conveying pipe; 604-Second sludge conveying pipe; 605-Third sludge conveying pipe; 7-Control device; 8-Tailwater discharge pipe; 9-Total nitrogen treatment chamber; 901-Basin body; 902-Basin cover; 903-Anaerobic bacteria proliferation chamber; 9031-Anaerobic biological packing material; 904-Mixing reaction chamber; 905-Overflow port; 906-Flow port; 10-Divider plate. Detailed Implementation

[0039] The following description, in conjunction with the accompanying drawings and preferred embodiments of the present invention, will provide further details.

[0040] This embodiment provides a specific implementation of an aquaculture water microbial purifier applied to a preferred embodiment of the present invention, and a total nitrogen treatment efficiency enhancement device installed at the tailwater discharge end of the aquaculture water microbial purifier.

[0041] like Figure 1 As shown, the aquaculture water microbial purifier includes a biological packing chamber 1, a water inlet device 2, a tailwater conveying device 3, an oxygen supply device 4, an internal circulation infusion device 5, a sediment diversion device 6, and a control device 7. In this embodiment, the water inlet device 2 includes an inlet pipe 201 and an inlet pump 202. One port of the inlet pipe 201 is connected to the inlet pump 202, and the other port is located in the middle of the inner cavity of the biological packing chamber 1, so that the water from the aquaculture pond is sent into the biological packing chamber 1 through the inlet pipe 201. The tailwater conveying device 3 includes a tailwater pumping pipe 301, a tailwater conveying pump 302, and a tailwater input pipe 303, which is used to transport the water from the bottom of the aquaculture pond as tailwater to the total nitrogen treatment enhancement device. One port of the tailwater pumping pipe 301 is located in the middle of the biological packing chamber 1. One port of the tailwater inlet pipe 303 is connected to the tailwater transfer pump 302, and the other port is located in the total nitrogen treatment enhancement device. The oxygen supply device 4 includes an oxygen supply pump 401, an oxygen supply pipe 402, and an air distribution plate 403. The air distribution plate 403 is located at the bottom of the biological packing chamber 1. The air inlet of the oxygen supply pipe 402 is connected to the oxygen supply pump 401, and the air outlet extends into the biological packing chamber 1 and is connected to the air inlet of the air distribution plate 403. Oxygen is supplied to the biological packing chamber 1 through the oxygen supply pipe 402 and the air distribution plate 403. The biological packing chamber 1 is filled with microbial packing material 101, which includes aerobic microbial packing material and anaerobic microbial packing material. The microbial packing material 101 is arranged above the air distribution plate 403.

[0042] like Figure 1As shown, the internal circulation infusion device 5 includes an internal circulation pump 501, an internal circulation inlet pipe 502, an internal circulation infusion pipe 503, and a leveling distributor 504. The internal circulation pump 501 is located at the top of the biological packing chamber 1. The inlet of the internal circulation inlet pipe 502 is located below the microbial packing 101, and the outlet of the internal circulation inlet pipe 502 is connected to the inlet of the internal circulation pump 501. The inlet of the internal circulation infusion pipe 503 is connected to the outlet of the internal circulation pump 501. The leveling distributor 504 is located between the microbial packing 101 and the air distribution plate 403, and the inlet of the leveling distributor 504 is connected to the outlet of the internal circulation infusion pipe 503. The sludge diversion device 6 includes a sludge diversion pipe 601, a sludge diversion pump 602, a first sludge conveying pipe 603, a second sludge conveying pipe 604, and... The inlet of the third sludge conveying pipe 605 and the sludge diversion pipe 601 are located at the bottom of the biological packing chamber 1 and below the gas distribution plate 403. The outlet of the sludge diversion pipe 601 is connected to the inlet of the sludge diversion pump 602. The sludge diversion pump 602 has a first outlet, a second outlet and a third outlet. The inlets of the first sludge conveying pipe 603, the second sludge conveying pipe 604 and the third sludge conveying pipe 605 are respectively connected to the first outlet, the second outlet and the third outlet of the sludge diversion pump 602. The outlet of the first sludge conveying pipe 603 is connected to the internal circulation conveying pipe 503. The outlet of the second sludge conveying pipe 604 is located at the top of the biological packing chamber 1. The outlet of the third sludge conveying pipe 605 is located in the total nitrogen treatment enhancement device.

[0043] The inlet pump 202, tailwater transfer pump 302, oxygen supply pump 401, internal circulation pump 501, and sediment diversion pump 602 are all electrically connected to the control device 7. Specifically, the control device 7 can adopt existing technologies such as PLC controllers, single-chip microcomputers, or microprocessors, which will not be detailed here. The oxygen supply pump 401, internal circulation pump 501, and sediment diversion pump 602 can be automatically or manually controlled in segments by the control device 7. Alternatively, the working period of the biological packing tank 1 can be divided into nitrification and denitrification periods by monitoring whether the various indicators of aquaculture water in the biological packing tank 1 meet the requirements and switching according to the real-time status of the various indicators of aquaculture water.

[0044] like Figure 1 and Figure 2As shown, the total nitrogen treatment enhancement device is installed on top of the aquaculture water purifier, seamlessly integrated with it, requiring no additional land area. The device includes the aforementioned tailwater inlet pipe 303, a third sediment transport pipe 605 serving as the anaerobic liquid inlet pipe, a tailwater discharge pipe 8, and a total nitrogen treatment chamber 9. The total nitrogen treatment chamber 9 includes a basin 901 (generally circular, but can also be square or other shapes) and a lid 902, which covers the basin 901 to form a fully enclosed structure. In this embodiment, the basin 901 contains four partition plates 10, which divide the basin 901 into an anaerobic bacteria proliferation chamber 9. The system comprises four mixing reaction chambers 904, wherein the upper part of the first and third partition plates 10 is provided with an overflow port 905, and the lower part of the second and fourth partition plates 10 is provided with an overflow port 906. The adjacent overflow ports 905 and overflow ports 906 are staggered in the horizontal and vertical directions. The anaerobic bacteria proliferation chamber 903 is filled with anaerobic biological packing material 9031. The third sediment conveying pipe 605 serves as the anaerobic liquid input pipe, and its outlet is located at the upper part of the anaerobic bacteria proliferation chamber 903. The outlet of the tailwater input pipe 303 is located at the upper part of the first mixing reaction chamber 904, and the inlet of the tailwater discharge pipe 8 is located at the upper part of the chamber wall of the last mixing reaction chamber 904.

[0045] Based on the aquaculture water microbial purifier and the total nitrogen treatment enhancement device installed at the tailwater discharge end of the aquaculture water microbial purifier provided in this embodiment, the preferred embodiment of the method for enhancing nitrification and denitrification effects in the aquaculture water microbial purifier of the present invention is as follows: Figure 3 As shown, it includes the following steps:

[0046] (1) Microbial packing 101 is filled into the biological packing chamber 1 of the aquaculture water microbial purifier. The microbial packing 101 includes biological packing for cultivating and propagating aerobic microorganisms and biological packing for anaerobic microorganisms.

[0047] (2) The water pump 202 sends the water from the aquaculture pond into the biological packing chamber 1 through the water inlet pipe 201;

[0048] (3) Close the sediment diversion pump 602 and open the oxygen supply pump 401. The oxygen supply pump 401 delivers oxygen to the biological packing chamber 1 through the oxygen supply pipe 402 and the air distribution plate 403, so that the biological packing chamber 1 is in an aerobic environment. At this time, the aquaculture water microbial purifier is in the nitrification period. The aerobic microorganisms in the biological packing chamber 1 carry out the nitrification reaction and reduce the ammonia content in the biological packing chamber 1. During the nitrification period, the internal circulation pump 501 extracts the aquaculture water from the biological packing chamber 1 and then pressurizes and sends it back to the biological packing chamber 1 and sprays it out, so that the aquaculture water forms a swirling water flow in the biological packing chamber 1, which drives the microbial packing 101 to rotate, thereby enhancing the microbial activity and increasing the nitrification treatment speed of the aquaculture water.

[0049] (4) After a certain period of time, turn off the oxygen supply pump 401 and turn on the sludge diversion pump 602. The sludge mixture at the bottom of the biological packing chamber 1 is diverted to the biological packing chamber 1 and the upper part of the biological packing chamber 1 through the sludge diversion pump 602, so that the sludge mixture covers the upper part of the biological packing chamber 1. It is then sprayed and released in the biological packing chamber 1 through the equalizer 504. At this time, the aquaculture water microbial purifier is in the denitrification period. During the denitrification period, the biological packing chamber 1 is in a closed anaerobic environment. The anaerobic microorganisms in the biological packing chamber 1 carry out the denitrification reaction, reducing the nitrogen content in the biological packing chamber 1. At the same time, it can carry out secondary proliferation of denitrifying bacteria and supplement organic carbon sources, thereby releasing high concentrations of anaerobic bacterial liquid and aquaculture water to carry out multiple more thorough mixing reactions, further shortening the total nitrogen treatment time and improving the total nitrogen treatment efficiency.

[0050] (5) The purified aquaculture water is transported to the aquaculture pond for recycling and reuse.

[0051] (6) Alternate between steps (3) and (4) until the aquaculture water meets the requirements for healthy aquaculture water. Then, the water at the bottom of the aquaculture pond is led to the first mixing reaction chamber 904 of the total nitrogen treatment enhancement device set at the end of the tailwater discharge of the aquaculture water microbial purifier. The sediment mixture at the bottom of the biological packing chamber 1 is then transported to the anaerobic bacteria proliferation chamber 903 through the third sediment conveying pipe 605. After secondary denitrification in the anaerobic bacteria proliferation chamber 903, the sediment mixture is continuously mixed with the tailwater in multiple mixing reaction chambers 904. The tailwater is discharged after the total nitrogen treatment is qualified and the discharge water is discharged.

[0052] The present invention provides a method for enhancing the nitrification and denitrification effects in a microbial purifier for aquaculture water. This method divides the working period of the microbial purifier into nitrification and denitrification periods, effectively utilizing the sediment mixture at the bottom of the biological packing chamber 1. This not only improves equipment utilization and achieves a complete nitrification and denitrification process but also reduces the space occupied by the equipment. During the nitrification period, the sediment diversion device 6 is closed, and the oxygen supply device 4 provides normal oxygen to the biological packing chamber 1, creating an aerobic environment that inhibits the activity of anaerobic microorganisms. Aerobic microorganisms can then carry out normal nitrification, converting ammonia nitrogen into nitrite nitrogen and nitrate nitrogen, thus reducing the ammonia content in the biological packing chamber 1. During the denitrification period, the oxygen supply device 4 is closed, and the sediment diversion device 6 introduces the sediment mixture from the bottom of the microbial purifier into the biological packing chamber 1, which is then transported to the equalizer 504 via the internal circulation infusion pipe 503 for spraying. The sediment mixture is released through the second sediment conveying pipe 604 and directed to the upper part of the biological packing chamber 1, so that the sediment mixture covers the upper part of the biological packing chamber 1. Because the biological packing chamber 1 forms a more closed anaerobic environment, it inhibits the activity of aerobic microorganisms. Anaerobic microorganisms can carry out cultivation and denitrification degradation reactions in this environment, and can also carry out secondary proliferation of denitrifying bacteria and supplement organic carbon sources, providing a compensatory function to ensure the denitrification process, strengthening the full nitrification and denitrification effect, further shortening the total nitrogen treatment time, improving the total nitrogen treatment efficiency, and realizing the convenience and efficiency of the special setting.

[0053] On the other hand, during the treatment of effluent, the sludge mixture at the bottom of the aquaculture water purifier is introduced through the anaerobic liquid inlet pipe as a supplement to the organic carbon source. This enhances the biomass of denitrifying bacteria and provides a supplementary composite carbon source for the denitrification reaction. In a fully enclosed, anoxic environment, the denitrifying bacteria proliferate and their activity is enhanced by the supplemented organic carbon source. They utilize nitrates or nitrites as electron acceptors, reducing them to nitrogen gas through respiration and releasing a high concentration of anaerobic bacterial liquid. This liquid undergoes multiple thorough mixing reactions with the effluent from the aquaculture pond. Multiple mixing reaction chambers (904) are sequentially connected, extending the reaction path and ensuring sufficient reaction of nitrates or nitrites. In this process, under the fully enclosed, anoxic environment, the organic matter in the sludge mixture acts as an electron donor, reducing nitrates to nitrogen gas. Simultaneously, the organic matter is oxidized, releasing energy for the denitrifying bacteria. After multiple stages of mixing and reaction, the effluent and bacterial liquid are effectively denitrified, forming effluent that better meets discharge requirements. This not only shortens the total nitrogen treatment time but also effectively improves the total nitrogen treatment efficiency in the effluent. Since the organic carbon source is derived from the sediment mixture at the bottom of the aquaculture water purifier, and the entire total nitrogen treatment enhancement device is divided into a total nitrogen treatment chamber 9, it can be installed above the aquaculture water purifier without occupying additional land area.

[0054] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this invention are included within the scope of protection of this invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this invention or exceed the scope defined in these claims, all of which should fall within the scope of protection of this invention.

Claims

1. A method for enhancing nitrification and denitrification effects in a microbial purifier for water used in aquaculture, characterized by The method comprises the following steps: (1) filling the biological filler bin of the water microorganism purifier for aquaculture with microbial fillers, and respectively cultivating and proliferating aerobic microorganisms or anaerobic microorganisms under oxygen-rich conditions or anoxic conditions in different time periods; (2) introducing water for aquaculture into the biological filler bin by the water inlet device; (3) closing the sludge drainage device and opening the oxygen supply device to supply oxygen to the biological filler bin, so that the biological filler bin is in an aerobic environment, at this time, the water microorganism purifier for aquaculture is in a nitrification period, and the aerobic microorganisms in the biological filler bin perform nitrification reaction to reduce the ammonia content in the biological filler bin; (4) after a certain period of time, the oxygen supply device is closed, and the closed sludge drainage device is opened, and the sludge mixture at the bottom of the biological filler bin is drained into the biological filler bin by the sludge drainage device, at this time, the water microorganism purifier for aquaculture is in a denitrification period, the biological filler bin is in an anaerobic environment, and the anaerobic microorganisms in the biological filler bin perform denitrification reaction to reduce the nitrogen content in the biological filler bin; (5) the purified water for aquaculture is transported to the breeding pond for cyclic degradation and breeding water reuse; (6) alternately performing steps (3) and (4) until the water for aquaculture meets the requirements of healthy breeding water, and then the bottom water of the aquaculture pond is introduced into the purifier for end denitrification and efficiency enhancement, and discharged as tail water; when the bottom water of the aquaculture pond is discharged as the tail water, the tail water is introduced into the total nitrogen treatment efficiency device arranged at the tail water discharge end of the water microorganism purifier for aquaculture; the total nitrogen treatment efficiency device is provided with an anaerobic bacteria proliferation chamber and a plurality of mixed reaction chambers connected in sequence, and the anaerobic bacteria proliferation chamber and the plurality of mixed reaction chambers are both fully closed structures; the anaerobic bacteria proliferation chamber is filled with biological fillers for proliferating anaerobic microorganisms, the anaerobic bacteria proliferation chamber introduces the sludge mixture at the bottom of the biological filler bin, the tail water is introduced into the first mixed reaction chamber, and the sludge mixture is subjected to secondary denitrification in the anaerobic bacteria proliferation chamber and then subjected to continuous mixed reaction with the tail water in the plurality of mixed reaction chambers.

2. The method for enhancing nitrification and denitrification effects in the aquaculture water microbial purifier according to claim 1, characterized by: In step (4), when the water microorganism purifier for aquaculture is in the denitrification period, the sludge mixture is introduced into the upper part of the biological filler bin to diffuse the sludge mixture in the biological filler bin.

3. The method for enhancing nitrification and denitrification effects in the aquaculture water microorganism purifier according to claim 2, characterized by: The biological filler bin is provided with an equal liquid distribution device; in step (4), when the sludge drainage device drains the sludge mixture at the bottom of the biological filler bin into the biological filler bin, the equal liquid distribution device is used to spray and release in the biological filler bin to form a swirling water flow in the biological filler bin, and drive the anaerobic microorganisms to rotate.

4. The method for enhancing nitrification and denitrification effects in the aquaculture water microorganism purifier according to claim 3, characterized by: The oxygen supply device comprises an oxygen supply pump, an oxygen supply pipe and a gas distribution disc, the gas distribution disc is arranged at the bottom of the biological filler bin, the gas outlet of the oxygen supply pipe extends into the biological filler bin and is connected with the gas inlet of the gas distribution disc, and oxygen is supplied to the biological filler bin through the oxygen supply pipe and the gas distribution disc; the biological filler bin is provided with an internal circulation liquid supply device, the internal circulation liquid supply device comprises an internal circulation pump, an internal circulation liquid inlet pipe, an internal circulation liquid supply pipe and the uniform liquid distribution device, the internal circulation pump is arranged at the top of the biological filler bin, the liquid inlet of the internal circulation liquid inlet pipe is between the microbial filler and the gas distribution disc, the liquid outlet of the internal circulation liquid inlet pipe is connected with the liquid inlet of the internal circulation pump, the liquid inlet of the internal circulation liquid supply pipe is connected with the liquid outlet of the internal circulation pump, the uniform liquid distribution device is arranged below the microbial filler, and the liquid inlet of the uniform liquid distribution device is connected with the liquid outlet of the internal circulation liquid supply pipe; the sediment drainage device comprises a sediment drainage pipe, a sediment drainage pump, a first sediment supply pipe and a second sediment supply pipe, the liquid inlet of the sediment drainage pipe is arranged at the bottom of the biological filler bin and below the gas distribution disc, the liquid outlet of the sediment drainage pipe is connected with the liquid inlet of the sediment drainage pump, the sediment drainage pump is provided with a first liquid outlet and a second liquid outlet, the liquid inlet of the first sediment supply pipe is connected with the first liquid outlet of the sediment drainage pump, the liquid outlet of the first sediment supply pipe is connected with the internal circulation liquid supply pipe in communication, the liquid inlet of the second sediment supply pipe is connected with the second liquid outlet of the sediment drainage pump, and the liquid outlet of the second sediment supply pipe is arranged at the upper portion of the biological filler bin.

5. The method for enhancing nitrification and denitrification effects in the aquaculture water microbial purifier according to claim 1, characterized by: The total nitrogen treatment synergistic device comprises a tail water input pipe, an anaerobic liquid input pipe, a tail water discharge pipe and a total nitrogen treatment bin; the total nitrogen treatment bin comprises a basin body and a basin cover, the basin cover covers the basin body, a plurality of partition plates are arranged in the basin body, and the basin body is divided into one anaerobic bacteria propagation cavity and a plurality of mixed reaction cavities by the plurality of partition plates; overflow ports or flow-through ports are arranged on each partition plate, and the overflow ports and the flow-through ports are arranged in sequence and at intervals; the water outlet of the anaerobic liquid input pipe is arranged at the upper portion of the anaerobic bacteria propagation cavity, the water outlet of the tail water input pipe is arranged at the upper portion of the first mixed reaction cavity, and the water inlet of the tail water discharge pipe is arranged on the upper portion of the cavity wall of the last mixed reaction cavity.

6. The method for enhancing nitrification and denitrification effects in the aquaculture water microorganism purifier according to claim 5, characterized by: The plurality of partition plates are arranged in parallel and vertically in the basin body, each overflow port is arranged at the upper portion of the corresponding partition plate, and each flow-through port is arranged at the lower portion of the corresponding partition plate; adjacent overflow ports and flow-through ports are staggered in the horizontal direction and the vertical direction.

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