A wastewater purification device based on activation of salt-tolerant denitrifying bacteria

Abstract

The present application relates to the technical field of wastewater treatment, and specifically discloses a wastewater purification device based on the activation of salt-tolerant denitrifying bacteria, including a biological purification pool, in which the biological purification pool is used to implement biological purification of wastewater by putting in salt-tolerant denitrifying bacteria, and also includes: a biological culture pool, a biofilm mechanism, a transfer temporary storage mechanism and an air intake control mechanism, the biological culture pool is provided with salt-tolerant denitrifying bacteria that are continuously cultivated, and the biological culture pool is used to provide salt-tolerant denitrifying bacteria to the biological purification pool; the biofilm mechanism is arranged in the biological purification pool, and is used to provide continuous purification of water quality; the output end of the transfer temporary storage mechanism is connected to the biofilm mechanism, and the input end of the transfer temporary storage mechanism is connected to the biological culture pool; the air intake control mechanism is arranged on the transfer temporary storage mechanism, and is used to adjust the speed at which the salt-tolerant denitrifying bacteria in the transfer temporary storage mechanism are released into the biofilm mechanism. The present invention can replenish salt-tolerant denitrifying bacteria in time and avoid the problem of local loss of biofilm.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a wastewater purification device based on activation of salt-tolerant denitrifying bacteria. Background Art

[0002] With the continuous advancement of industrialization and the rapid growth of population, the pollution of water resources is becoming increasingly serious; wastewater treatment technology has become an important topic in the field of environmental protection; traditional wastewater treatment methods include physical treatment, chemical treatment and biological treatment; among them, biological treatment occupies an important position in wastewater treatment technology due to its environmental protection and high efficiency; in biological treatment technology, the denitrification process is crucial for removing nitrogen pollutants in wastewater; usually, the denitrification process includes nitrification and denitrification; nitrification is the oxidation of ammonia nitrogen (NH4+-N) to nitrate (NO3--N) by nitrifying bacteria, while denitrification is the reduction of nitrate to nitrogen gas (N2) by denitrifying bacteria and released into the atmosphere; however, the efficiency of traditional denitrification processes is significantly reduced in high-salinity wastewater environments, mainly because most nitrifying bacteria and denitrifying bacteria have low tolerance to salt.

[0003] In recent years, the application of salt-tolerant denitrifying bacteria has provided a new solution for the biological treatment of high-salt wastewater. Salt-tolerant denitrifying bacteria can effectively carry out nitrification and denitrification in a high-salt environment, greatly improving the treatment efficiency of high-salt wastewater. However, in practical applications, how to stably cultivate and maintain the activity of salt-tolerant denitrifying bacteria has become a difficult problem in the application of the technology. In addition, since biofilm shedding and local loss of fillers may occur during the operation of the wastewater treatment system, how to replenish salt-tolerant denitrifying bacteria in time under these emergencies and ensure their growth in the target location is also an important issue that needs to be solved. Summary of the invention

[0004] The embodiment of the present application provides a wastewater purification device based on the activation of salt-tolerant denitrifying bacteria, the main purpose of which is to achieve timely replenishment of salt-tolerant denitrifying bacteria and avoid the problem of local loss of biofilm.

[0005] To achieve the above-mentioned purpose, the embodiment of the present application provides a wastewater purification device based on activation of salt-tolerant denitrifying bacteria, including a biological purification pool, wherein the biological purification pool is used to perform biological purification of wastewater by adding salt-tolerant denitrifying bacteria, and further comprising:

[0006] A biological culture pool is provided with salt-tolerant denitrifying bacteria that are continuously cultivated, and the biological culture pool is used to provide salt-tolerant denitrifying bacteria to the biological purification pool;

[0007] A biofilm mechanism is arranged in the biological purification tank to provide continuous purification of water quality;

[0008] A transfer temporary storage mechanism, wherein the output end of the transfer temporary storage mechanism is connected to the biofilm mechanism, and the input end of the transfer temporary storage mechanism is connected to the biological culture pool;

[0009] The air intake control mechanism is arranged on the transfer temporary storage mechanism and is used to adjust the speed of releasing the salt-tolerant denitrifying bacteria in the transfer temporary storage mechanism into the biofilm mechanism.

[0010] In a feasible embodiment, the transfer temporary storage mechanism includes: a transfer box, which is arranged above the biological purification pool, with an air intake gap between the biological purification pool and the transfer box, and the transfer box is in a closed state; a plurality of temporary storage boxes, which are fixedly arranged at the bottom end of the transfer box, and the top opening of the temporary storage box is connected to the inner cavity of the transfer box; a recovery pipe, one end of which is connected to the bottom end of the transfer box, and the other end is connected to the inner cavity of the biological culture pool, and a one-way valve is arranged in the recovery pipe; a water inlet pipe, one end of which is connected to the water pump outlet in the biological culture pool, and the other end is connected to the inlet of the transfer box.

[0011] In a feasible embodiment, the bottom end of the transfer box is an inclined surface, the inlet side of the transfer box is higher than the side connected to the recovery pipe, the water inlet side of the biological purification tank corresponds to the inlet side of the transfer box, and the recovery pipe connection side of the transfer box corresponds to the drainage side of the biological purification tank.

[0012] In a feasible embodiment, a cleaning mechanism is also provided in the transfer temporary storage mechanism, and the cleaning mechanism is used to clean the transfer box and the biological salt-tolerant denitrifying bacteria attached to the inner wall of the temporary storage box; the cleaning mechanism includes: a water tank, fixedly arranged in the middle of the top of the transfer box; a hose, connected to the bottom of the water tank and located in the inner cavity of the transfer box; a guide rail, arranged in the inner cavity of the transfer box parallel to the bottom wall of the transfer box; a plurality of limit members, fixedly arranged on the side wall surface of the inner cavity of the transfer box above the temporary storage box; a moving frame, which is driven by The device is movably arranged on the guide rail; a plurality of side nozzles are fixedly arranged on the side wall of the movable frame and are connected to the hose; a driving wheel is rotatably arranged on the side wall of the movable frame below the side nozzle through a rotating shaft, and the position of the driving wheel corresponds to that of the movable frame; a plurality of bottom nozzles are fixedly connected to the bottom end of the rotating shaft of the driving wheel; wherein a torsion spring is sleeved on the end of the rotating shaft of the driving wheel to keep the bottom nozzle in a tilted state at an angle a by default, and the end of the limit member is located on the extension line of the end of the temporary storage box in the direction of angle a.

[0013] In a feasible embodiment, an aeration mechanism is also provided in the biological purification tank, and the aeration mechanism includes: an aeration main pipe, which runs through the biological purification tank, and the outer end of the aeration main pipe is connected to an aeration pump; a plurality of aeration branch pipes, which are equidistantly fixedly arranged at the bottom of the biological purification tank, and the plurality of aeration branch pipes are all connected to the aeration main pipe; and a plurality of aeration nozzles, which are equidistantly fixedly arranged on the top outer wall of the aeration branch pipe, for aerating the biological purification tank.

[0014] In a feasible embodiment, the biofilm mechanism includes: a plurality of lifting rods fixedly mounted on the bottom end of the temporary storage box, the inner cavity of the lifting rods being hollow, and the inner cavity of the lifting rods being communicated with the inner cavity of the temporary storage box; a plurality of connecting cross bars fixedly connected to the outer wall of the lifting rods at equal intervals, and a conveying channel is arranged in the inner cavity of the connecting cross bars; a plurality of film plates fixedly mounted on the outer wall of the connecting cross bars at equal intervals, and the plurality of film plates are parallel to the flow direction of the wastewater; a plurality of film fillers, one end of which is fixedly connected to the two outer walls of the film plates on the side parallel to the flow direction of the water flow, and the film fillers are flexible fillers.

[0015] In a feasible embodiment, the film hanging plate includes: a plate body; a primary connecting pipe, which is arranged in the middle of the plate body, and the middle of the primary connecting pipe is connected to the conveying channel; a plurality of secondary connecting pipes, which are arranged in the inner cavity of the plate body and are all connected to both sides of the primary connecting pipe; a plurality of tertiary connecting pipes, which are arranged in the inner cavity of the plate body and are all connected to both sides of each of the secondary connecting pipes; a plurality of release holes, each of which is opened through the plate body, and the release hole is connected to the tertiary connecting pipe.

[0016] In a feasible implementation, the root of the biofilm filler is buckled on the outside of the release hole, and the release hole is opened obliquely in the direction of water flow; each of the release holes is connected to at least two of the three-level connecting pipes.

[0017] In a feasible embodiment, the air intake control mechanism includes: an air intake cylinder, fixedly mounted on the top outer wall of the transfer box; a strip opening, penetrating and opened on the outer wall of the air intake cylinder; a protrusion, which is movable along the length direction of the air intake cylinder and is clamped in the air intake cylinder, and the outer end of the protrusion protrudes from the air intake cylinder through the strip opening; the protrusion provides different degrees of sealing and shielding for the strip opening; an adjusting bolt, screwed on the outer end of the protrusion, and the bottom end of the adjusting bolt abuts against the outer wall of the transfer box; and an air intake section, which is arranged in the strip opening that is not blocked below the protrusion.

[0018] The present application provides a wastewater purification device based on the activation of salt-tolerant denitrifying bacteria. By setting up a biological culture tank and a transfer temporary storage mechanism, it is ensured that there are always sufficient and active salt-tolerant denitrifying bacteria in the biological purification tank, thereby improving the stability and efficiency of wastewater treatment; the biological culture tank continuously cultivates salt-tolerant denitrifying bacteria, and releases them accurately to the core position of the biofilm mechanism through the transfer temporary storage mechanism, thereby ensuring the uniform distribution and effective attachment of the bacterial community on the biofilm; the introduction of the air intake control mechanism enables the operator to accurately control the release rate of the bacterial community by adjusting the air intake volume, thereby avoiding waste of the bacterial community, and can quickly restore the function of the biofilm when the activity of the bacterial community in the biological purification tank is reduced or partially missing; in addition, the design of the present device can cope with the needs of biofilm repair under sudden conditions during the wastewater treatment process, ensure the continuity and efficiency of the wastewater treatment process, and is particularly suitable for treating saline wastewater, thereby significantly improving the reliability and adaptability of the overall wastewater purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a wastewater purification device based on activation of salt-tolerant denitrifying bacteria provided in an embodiment of the present application is shown;

[0020] Figure 2 A schematic diagram of the structure of a transfer box and a temporary storage box provided in an embodiment of the present application is shown;

[0021] Figure 3 A schematic diagram of the structure of the aeration mechanism provided in an embodiment of the present application is shown;

[0022] Figure 4 A schematic diagram of the structure of the dispersible tablet provided in the embodiment of the present application is shown;

[0023] Figure 5 A schematic diagram of the structure of the biofilm mechanism provided in the embodiment of the present application is shown;

[0024] Figure 6 Shows Figure 1 A magnified view of the structure at A;

[0025] Figure 7 The schematic diagram of the structure of the biofilm filler provided in the embodiment of the present application is shown;

[0026] Figure 8 A schematic diagram of the structure of the connecting beam and the conveying channel provided in an embodiment of the present application is shown;

[0027] Fig. 9 A schematic diagram of the structure of a primary connecting pipe, a secondary connecting pipe and a tertiary connecting pipe provided in an embodiment of the present application is shown;

[0028] Fig.10 A schematic diagram of the structure of a cleaning mechanism provided in an embodiment of the present application is shown;

[0029] Fig.11 Shows Fig.10 A partial enlarged view of point B in FIG.

[0030] In the figure: 1, biological purification tank, 2, water inlet, 3, biological culture tank, 4, transfer temporary storage mechanism, 5, aeration mechanism, 6, biofilm mechanism, 7, air intake control mechanism, 8, cleaning mechanism, 21, dispersion tablets, 41, transfer box, 42, temporary storage box, 43, recovery pipe, 44, water inlet pipe, 51, aeration main pipe, 52, aeration branch pipe, 53, aeration nozzle, 61, lifting rod, 62, connecting cross bar, 63, film plate, 64, film filling Material, 621, conveying channel, 631, plate body, 632, primary connecting pipe, 633, secondary connecting pipe, 634, tertiary connecting pipe, 635, release hole, 71, air intake cylinder, 72, strip opening, 73, bump, 74, adjusting bolt, 75, air intake section, 81, water tank, 82, hose, 83, guide rail, 84, limiter, 85, moving frame, 86, side nozzle, 87, driving wheel, 88, bottom nozzle, 89, driving device. DETAILED DESCRIPTION

[0031] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0032] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0033] Example 1

[0034] In recent years, the application of salt-tolerant denitrifying bacteria has provided a new solution for the biological treatment of high-salt wastewater. Salt-tolerant denitrifying bacteria can effectively carry out nitrification and denitrification in a high-salt environment, greatly improving the treatment efficiency of high-salt wastewater. However, in practical applications, how to stably cultivate and maintain the activity of salt-tolerant denitrifying bacteria has become a difficult problem in the application of the technology. In addition, since biofilm shedding and partial loss of fillers may occur during the operation of the wastewater treatment system, how to replenish salt-tolerant denitrifying bacteria in time under these emergencies and ensure their growth in the target location is also an important issue that needs to be solved.

[0035] Therefore, the embodiment of the present application provides a wastewater purification device based on the activation of salt-tolerant denitrifying bacteria, the main purpose of which is to achieve timely replenishment of biofilm shedding and avoid the problem of local loss of biofilm.

[0036] See also Figures 1 to 11 As shown, the embodiment of the present application provides a wastewater purification device based on the activation of salt-tolerant denitrifying bacteria, including a biological purification pool 1, which implements biological purification of wastewater by putting in salt-tolerant denitrifying bacteria; the wastewater purification device also includes a biological culture pool 3, which is used to continuously cultivate salt-tolerant denitrifying bacteria and provide salt-tolerant denitrifying bacteria to the biological purification pool 1 to ensure that there are enough salt-tolerant denitrifying bacteria in the biological purification pool 1 for wastewater treatment; the clean water source (which meets the discharge standards) after treatment is discharged into the environment through the outlet of the biological purification pool 1; the biofilm mechanism 6 is arranged in the biological purification pool 1 to provide continuous water purification, and also includes a place for the biofilm to grow and attach (such as biological filler); the bacterial community in the biofilm mechanism 6 is attached to the surface of the filler, through nitrification and denitrification process The process removes nitrogen pollutants in wastewater; in order to ensure that salt-tolerant denitrifying bacteria can be replenished in time when there is a lack of biological bacteria or the activity of the bacterial community in the biological purification pool 1 is reduced, the device is innovatively provided with a transfer temporary storage mechanism 4; the output end of the transfer temporary storage mechanism 4 is connected to the biofilm mechanism 6, and the input end is connected to the biological culture pool 3, and the continuous supply of bacterial community to the biofilm mechanism 6 is achieved by controlling the transmission of the bacterial community from the biological culture pool 3 to the biofilm mechanism 6; the device is also provided with an air intake control mechanism 7, which is installed on the transfer temporary storage mechanism 4 and is used to adjust the speed at which the salt-tolerant denitrifying bacteria are released from the transfer temporary storage mechanism 4 to the biofilm mechanism 6; the air intake control mechanism 7 adjusts the pressure inside the transfer temporary storage mechanism 4 by controlling the air intake amount, thereby accurately controlling the bacterial community release speed and ensuring the uniform distribution and effective attachment of the bacterial community in the biofilm mechanism 6.

[0037] The working principle of the wastewater purification device based on the activation of salt-tolerant denitrifying bacteria provided in the present application is as follows: first, the salt-tolerant denitrifying bacteria are continuously cultured in the biological culture pool 3. When it is necessary to supplement the bacterial flora in the biological purification pool 1, the salt-tolerant denitrifying bacteria that have been activated and cultured are introduced into the transfer temporary storage mechanism 4 through a water pump, and then the bacterial flora is slowly released to the core position of the biofilm mechanism 6 through the transfer temporary storage mechanism 4 under the regulation of the air intake control mechanism 7, so as to achieve accurate supplementation of the biofilm missing position; through the bacterial flora supplementation method of the present device, when the bacterial flora activity of the biological purification pool 1 is reduced or partially missing, the function of the biofilm can be quickly restored to maintain an efficient and continuous water purification effect; during the application process, the operator only needs to regularly check the bacterial flora status in the biological culture pool 3 to ensure that the bacterial flora activity is good, and adjust the bacterial flora release rate through the air intake control mechanism 7 according to the actual operation of the biological purification pool 1 to maintain the best wastewater treatment effect; this scheme not only improves the stability and efficiency of wastewater treatment, but also can cope with the biofilm repair needs under sudden conditions, and is suitable for the treatment of various types of saline wastewater.

[0038] like Figures 1 to 4 As shown, in some examples, further, the biological purification pool 1 includes a water inlet 2, and a plurality of inclined dispersion sheets 21 are arranged in the water inlet 2; the dispersion sheets 21 are designed to evenly disperse the water flow in the water inlet 2 into the biological purification pool 1, ensuring that the wastewater can be evenly distributed when entering the biological purification pool 1, thereby improving the efficiency of contact between the wastewater and the salt-tolerant denitrifying bacteria, and promoting uniform purification of the wastewater; it helps to avoid excessive concentration or excessive speed of water flow in certain areas, ensuring that the treatment effect of the entire biological purification pool 1 is consistent, thereby improving the overall purification efficiency.

[0039] like Figures 1 to 3 As shown, in some examples, further, the transfer temporary storage mechanism 4 includes: a transfer box 41, a plurality of temporary storage boxes 42, a recovery pipe 43 and a water inlet pipe 44; the transfer box 41 is arranged above the biological purification pool 1, and an air intake gap is left between the biological purification pool 1 and the transfer box 41, and the transfer box 41 is in a closed state; a plurality of temporary storage boxes 42 are fixedly arranged at the bottom end of the transfer box 41, and the top opening of the temporary storage box 42 is connected to the inner cavity of the transfer box 41; one end of the recovery pipe 43 is connected to the bottom end of the transfer box 41, and the other end is connected to the inner cavity of the biological culture pool 3, and a one-way valve is arranged in the recovery pipe 43; one end of the water inlet pipe 44 is connected to the water pump outlet in the biological culture pool 3, and the other end is connected to the inlet of the transfer box 41.

[0040] Specifically, the main body of the transfer temporary storage mechanism 4 is a transfer box 41, which is arranged above the biological purification pool 1 and has an independent storage space. It is used when the bacterial flora in the biological purification pool 1 is missing, and is specifically used to store the bacterial flora that is about to enter the biological purification pool 1. An air intake gap is left between the transfer box 41 and the biological purification pool 1 to avoid blocking the biological purification pool 1, so that oxygen in the air can contact the water surface to avoid water hypoxia, and it is also conducive to aeration. The transfer box 41 is in a closed state; a plurality of temporary storage boxes 42 are fixed at the bottom of the transfer box 41, allowing the salt-tolerant denitrification bacteria in the biological culture pool 3 to pass through. The water flows into the temporary storage box 42 through the transfer box 41 for temporary storage; one end of the water inlet pipe 44 is connected to the water pump outlet in the biological culture pool 3, and the other end is connected to the inlet of the transfer box 41. Through the action of the water pump, the salt-tolerant denitrifying bacteria that have completed the activation culture are transported from the biological culture pool 3 to the transfer box 41; one end of the recovery pipe 43 is connected to the bottom end of the transfer box 41, and the other end is connected to the inner cavity of the biological culture pool 3. A one-way valve is arranged in the recovery pipe 43 to ensure that in the process of the bacterial flora entering the transfer box 41 from the biological culture pool 3, after all the temporary storage boxes 42 are saturated, the excess bacterial flora can only flow back to the biological culture pool 3 in one direction to avoid reverse flow.

[0041] The working principle is that the operator first needs to regularly check the status of the bacterial community in the biological culture tank 3 to ensure that it is in good activity; when it is detected that the biofilm in the biological purification tank 1 needs to be replenished, the water pump is started to transport the salt-tolerant denitrifying bacteria in the biological culture tank 3 to the transfer box 41; in the transfer box 41, the salt-tolerant denitrifying bacteria are temporarily stored in all the temporary storage boxes 42, and the release speed is adjusted by the air intake control mechanism 7; the air intake control mechanism 7 controls the pressure in the transfer box 41 by adjusting the air intake volume, thereby controlling the speed at which the salt-tolerant denitrifying bacteria are slowly released into the biofilm mechanism 6, ensuring that the bacterial community can be evenly distributed in the biofilm mechanism 6; through this method, the purification system can continuously and stably treat wastewater, adapt to the treatment needs of various high-salt wastewaters, and ensure the water purification effect.

[0042] like Figure 2 As shown, in some examples, further, the bottom end of the transfer box 41 is an inclined surface, the inlet side of the transfer box 41 is higher than the side connected to the recovery pipe 43, the water inlet 2 side of the biological purification tank 1 corresponds to the inlet side of the transfer box 41, and the recovery pipe 43 connection side of the transfer box 41 corresponds to the drainage side of the biological purification tank 1.

[0043] It should be noted that the bottom end of the transfer box 41 is designed to be an inclined surface, and its inlet side is higher than the side connected to the recovery pipe 43; this design allows the salt-tolerant denitrifying bacteria to flow naturally to the lower end under the action of gravity, which helps to ensure that all temporary storage boxes 42 can be fully replenished with bacteria. When the bacteria are replenished to the point where each temporary storage box 42 is overflowing, the excess bacteria flow back and the water pump stops working; in addition, one side of the water inlet 2 of the biological purification tank 1 corresponds to the position of the inlet side of the transfer box 41, and the side connected to the recovery pipe 43 of the transfer box 41 corresponds to the drainage side of the biological purification tank 1. This design is suitable for water flowing in a specific direction in the biological purification tank 1, thereby ensuring the flow uniformity and effectiveness during the wastewater treatment process.

[0044] Specifically, in order to optimize the utilization efficiency of the salt-tolerant denitrifying bacteria, the temporary storage box 42 in the transfer temporary storage mechanism 4 is designed as a plurality of units with gradually decreasing volumes; the temporary storage box 42 on the front side of the water flow direction finally formed has a larger volume and stores a larger number of bacteria; these bacteria are preferentially released at the upper end of the water flow to ensure that there are sufficient bacteria for biological treatment of wastewater in the initial stage; along the flow direction of the water, the volume of the temporary storage box 42 gradually decreases, and the number of stored bacteria and the number of bacteria that can be released also gradually decrease; the principle of this design is to enable the salt-tolerant denitrifying bacteria to be effectively utilized at different stages of the water flow without causing excessive accumulation and waste of bacteria at the end of the water flow; in actual use, the operator controls the water pump to transport the salt-tolerant denitrifying bacteria in the biological culture tank 3 to the transfer box 41, and then adjusts the bacteria release rate through the air intake control mechanism 7 to ensure that an appropriate amount of bacteria is released to the biofilm mechanism 6 at different stages to ensure the continuous repair and biofilm formation.

[0045] like Figure 3 and Figure 4 As shown, in some examples, further, an aeration mechanism 5 is provided in the biological purification tank 1, and the aeration mechanism 5 includes: an aeration main pipe 51, a plurality of aeration branch pipes 52 and a plurality of aeration nozzles 53; the aeration main pipe 51 runs through the biological purification tank 1, and the outer end of the aeration main pipe 51 is connected to an aeration pump; a plurality of aeration branch pipes 52 are fixedly arranged at equal distances on the bottom of the biological purification tank 1, and the plurality of aeration branch pipes 52 are all connected to the aeration main pipe 51; a plurality of aeration nozzles 53 are fixedly arranged at equal distances on the outer wall of the top end of the aeration branch pipe 52, for aerating the biological purification tank 1.

[0046] In this example, an aeration mechanism 5 is also provided in the biological purification pool 1 to ensure sufficient dissolved oxygen supply during the wastewater treatment process, thereby promoting the growth and metabolism of salt-tolerant denitrifying bacteria; the aeration mechanism 5 includes an aeration main pipe 51, a plurality of aeration branches 52 and a plurality of aeration nozzles 53; the aeration main pipe 51 runs through the entire biological purification pool 1, and its outer end is connected to an aeration pump. Through the operation of the aeration pump, air is pressed into the aeration main pipe 51; a plurality of aeration branches 52 are equidistantly fixed at the bottom of the biological purification pool 1. Such a layout can ensure the entire biological purification pool 1 is clean and hygroscopic. The air at the bottom of the pool is evenly distributed; each aeration branch pipe 52 is connected to the aeration main pipe 51, so that the air can be evenly distributed from the main pipe to each branch pipe; a plurality of aeration nozzles 53 are equidistantly fixedly arranged on the top outer wall of each aeration branch pipe 52, and a large number of aeration nozzles 53 are used to release air into the biological purification pool 1. The tiny bubbles fully contact with the wastewater during the process of rising in the water, thereby increasing the dissolved oxygen content in the wastewater, promoting the activity of aerobic microorganisms, accelerating the nitrification and denitrification processes, and effectively removing nitrogen pollutants in the wastewater.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 8 and Fig. 9 As shown, in some examples, further, the biofilm mechanism 6 includes: multiple hanging rods 61, multiple connecting cross rods 62, multiple film plates 63 and multiple film fillers 64; multiple hanging rods 61 are fixedly hung at the bottom end of a temporary storage box 42, the inner cavity of the hanging rods 61 is hollow, and the inner cavity of multiple hanging rods 61 is connected with the inner cavity of a temporary storage box 42; multiple connecting cross rods 62 are equidistantly fixedly connected to the outer wall of a hanging rod 61, and a conveying channel 621 is arranged in the inner cavity of the connecting cross rod 62; multiple film plates 63 are equidistantly fixedly installed on the outer wall of a connecting cross rod 62, and multiple film plates 63 are parallel to the flow direction of wastewater; one end of multiple film fillers 64 is fixedly connected to the two outer walls of the film plate 63 on the side parallel to the flow direction of water flow, and the film fillers 64 are flexible fillers.

[0048] In this example, it should be noted that a plurality of hoisting rods 61 are fixed at the bottom end of the temporary storage box 42, and the inner cavity of each hoisting rod 61 is hollow and communicated with the inner cavity of the temporary storage box 42. Such a design enables the salt-tolerant denitrifying bacteria to flow from the temporary storage box 42 through the hoisting rod 61 into the biofilm mechanism 6; the connecting cross bar 62 is equidistantly fixed on the outer wall of the hoisting rod 61, and a conveying channel 621 is provided in its inner cavity, so that the salt-tolerant denitrifying bacteria can be further distributed along the cross bar; the biofilm plate 63 is equidistantly fixed on the outer wall of the connecting cross bar 62 and parallel to the flow direction of the wastewater, so as to ensure that the wastewater can maximize contact with the microorganisms attached to the biofilm plate 63 when flowing through the biofilm plate 63; the biofilm filler 64 is a flexible filler, one end of which is fixed on the two outer walls of the biofilm plate 63 parallel to the flow direction of the water flow, so that the biofilm filler 64 can swing freely during the flow of the wastewater, thereby increasing the contact area between the microorganisms and the wastewater.

[0049] The working principle is that when wastewater flows into the biological purification pool 1, the wastewater first passes through the dispersion sheet 21 of the water inlet 2, and the water flow is evenly dispersed and then flows through the biofilm mechanism 6 provided with a biofilm plate 63 and a biofilm filler 64. The salt-tolerant denitrifying bacteria are evenly distributed to each biofilm plate 63 and biofilm filler 64 through the lifting rod 61 and the conveying channel 621 connecting the cross bar 62 to complete the biofilm. When the wastewater flows through the biofilm plate 63 and the biofilm filler 64, it fully contacts the salt-tolerant denitrifying bacteria attached thereto for biodegradation and denitrification. The flexible characteristics of the biofilm filler 64 enable it to swing freely under the action of the water flow, thereby increasing the contact area between the wastewater and the microorganisms and improving the treatment efficiency; therefore, the biofilm mechanism 6 provided in this example can continuously provide sufficient active microorganisms to achieve efficient purification of the wastewater and ensure that the pollutants in the wastewater are effectively degraded and removed.

[0050] like Fig. 9 As shown, in some examples, further, the film hanging plate 63 includes: a plate body 631, a primary connecting tube 632, a plurality of secondary connecting tubes 633, a tertiary connecting tube 634 and a plurality of release holes 635; the primary connecting tube 632 is arranged in the middle of the plate body 631, and the middle of the primary connecting tube 632 is connected to the conveying channel 621; a plurality of secondary connecting tubes 633 are arranged in the inner cavity of the plate body 631, and are all connected to both sides of the primary connecting tube 632; the tertiary connecting tube 634 is arranged in the inner cavity of the plate body 631, and are all connected to both sides of the secondary connecting tube 633; ​​a plurality of release holes 635 are opened through the plate body 631, and the release holes 635 are connected to the tertiary connecting tube 634.

[0051] Specifically, the biofilm plate 63 includes a plate body 631, a primary connecting pipe 632, a plurality of secondary connecting pipes 633, a tertiary connecting pipe 634 and a plurality of release holes 635; wherein the plate body 631 is the main structure of the biofilm plate 63, which is used for supporting and fixing and connecting with the connecting cross bar 62; the primary connecting pipe 632 is arranged in the middle of the plate body 631, and its main function is to transfer the salt-tolerant denitrifying bacteria from the conveying channel 621 to the entire biofilm plate 63; the middle of the primary connecting pipe 632 is connected to the conveying channel 621 to ensure that the salt-tolerant denitrifying bacteria can smoothly enter the internal structure of the biofilm plate 63; a plurality of secondary connecting pipes 633 are arranged in the inner cavity of the plate body 631; the purpose of these secondary connecting pipes 633 is to further distribute the salt-tolerant denitrifying bacteria from the primary connecting pipe 621 to the entire biofilm plate 63; 32, ensuring that the bacterial community can be evenly distributed to all parts of the plate body 631; the tertiary connecting pipe 634 is arranged in the inner cavity of the plate body 631, so that the three-level distribution structure enables the salt-tolerant denitrifying bacteria to be more finely transmitted to every corner of the biofilm plate 63; the release holes 635 are multiple small holes arranged on the plate body 631, which run through the entire plate body 631, so there are two release ports and are connected to the tertiary connecting pipe 634; the function of the release holes 635 is to release the salt-tolerant denitrifying bacteria to the outer surface of the biofilm plate 63, so that it adheres to the biofilm plate 63, thereby forming a layer of biofilm; when the wastewater flows through the biofilm plate 63, it fully contacts with these microorganisms attached to the surface, thereby undergoing biodegradation and denitrification treatment.

[0052] The working principle is that after the salt-tolerant denitrifying bacteria enter the primary connecting pipe 632 of the biofilm plate 63 through the conveying channel 621, the bacterial community passes through the secondary connecting pipe 633 and the tertiary connecting pipe 634 in turn, and is finally evenly distributed to the outer surface of the biofilm plate 63 from the release holes 635; the densely distributed release holes 635 on the biofilm plate 63 ensure that the bacterial community can cover the entire surface of the plate body 631 to form a continuous biofilm; when the wastewater flows through the biofilm plate 63, it comes into contact with the microorganisms on these biofilms, and the microorganisms degrade the pollutants in the wastewater, especially nitrogen compounds, through metabolism, thereby ensuring the effective utilization of the salt-tolerant denitrifying bacteria in the wastewater treatment process and improving the purification effect of the wastewater.

[0053] like Fig. 9 As shown, in some examples, further, the root of the biofilm filler 64 is buckled on the outside of the release hole 635, and the release hole 635 is opened obliquely in the direction of water flow; each release hole 635 is connected to at least two tertiary connecting pipes 634.

[0054] It is worth mentioning that the root of the biofilm filler 64 in this example is buckled on the outside of the release hole 635, and each release hole 635 is connected to at least two three-level connecting pipes 634. This design ensures that the salt-tolerant denitrifying bacteria can be effectively transmitted and released to the biofilm filler 64; specifically, the biofilm filler 64 is buckled on the outside of the release hole 635, so that the bacterial community can be smoothly transmitted to the biofilm filler 64 through the release hole 635; because the release hole 635 is opened obliquely in the direction of water flow, this structural design helps to guide the direction of water flow, making it easier for the bacterial community to attach to the filler along the direction of water flow to form a uniform biofilm.

[0055] In actual work, the transfer box 41 is used as a closed structure, and its internal air pressure is adjusted by the air intake control mechanism 7; the air intake control mechanism 7 can slowly intake air, thereby gradually increasing the air pressure in the transfer box 41, so that the salt-tolerant denitrifying bacteria slowly and evenly enter the root position of the filler of the biofilm plate 63; since each release hole 635 has a double opening structure and is connected to two three-level connecting pipes 634, this design ensures that each release hole 635 has a variety of liquid supply paths; when one path is blocked or one side of the release hole 635 opening is blocked by biofilm filling, the bacterial colony will automatically select other positions with unobstructed openings for release; this structural design enables the salt-tolerant denitrifying bacteria to be accurately distributed to the position where the biofilm is missing, avoiding the waste of the bacterial colony.

[0056] Specifically, when the bacterial flora in the transfer box 41 gradually enters the biofilm filler 64 through the connecting pipes and the release holes 635, if one of the openings of a certain release hole 635 is blocked, the bacterial flora will automatically flow to other unblocked release holes 635 or another release hole 635 within the current release hole 635, ensuring that all parts of each biofilm plate 63 can be evenly supplemented with bacterial flora; in this way, even if the release holes 635 are temporarily blocked due to biofilm filling in some local positions, the overall distribution of the bacterial flora will not be affected; through the effects of pressure and fluid gravity, as well as the inclined design of the release holes 635 and the multi-path liquid supply structure, the system can automatically adjust the release path of the bacterial flora to ensure that the bacterial flora is accurately supplemented to the required position; ensuring that the biological purification system continues to operate efficiently and improves the wastewater treatment effect.

[0057] like Figure 1 and Figure 6As shown, in some examples, further, the air intake control mechanism 7 includes: an air intake cylinder 71, a strip opening 72, a protrusion 73, an adjusting bolt 74 and an air intake section 75; the air intake cylinder 71 is fixedly mounted on the top outer wall of the transfer box 41; the strip opening 72 is penetrated and opened on the outer wall of the air intake cylinder 71; the protrusion 73 can move along the length direction of the air intake cylinder 71, and is clamped in the air intake cylinder 71, and the outer end of the protrusion 73 protrudes from the air intake cylinder 71 through the strip opening 72; the protrusion 73 provides different degrees of sealing and shielding for the strip opening 72; the adjusting bolt 74 is screwed on the outer end of the protrusion 73, and the bottom end of the adjusting bolt 74 abuts against the outer wall of the transfer box 41; the air intake section 75 is arranged in the unobstructed strip opening 72 below the protrusion 73.

[0058] In this example, the air intake control mechanism 7 includes an air intake cylinder 71, which is fixedly mounted on the top outer wall of the transfer box 41 and serves as the main passage of the air intake system; a strip opening 72 penetrates the outer wall of the air intake cylinder 71, allowing air to enter the interior of the air intake cylinder 71 through the strip opening 72; the protrusion 73 can move along the length direction of the air intake cylinder 71, and the position where the protrusion 73 overlaps with the strip opening 72 is a closed position. In the process of lifting the protrusion 73, a larger area of ​​the strip opening 72 can be exposed, thereby providing different degrees of sealing and shielding for the strip opening 72, and further realizing the adjustment of the air intake speed; the outer end of the protrusion 73 protrudes out of the air intake cylinder 71 through the strip opening 72, and can cooperate with the adjusting bolt 74. By rotating the adjusting bolt 74, the lifting position of the protrusion 73 in the default state can be changed, thereby adjusting the shielding degree of the strip opening 72; the air intake section 75 is arranged in the unblocked strip opening 72 below the protrusion 73, as a passage for air to enter the transfer box 41.

[0059] During use, the operator controls the position of the protrusion 73 by rotating the adjustment bolt 74, thereby adjusting the size and air intake of the default strip opening 72 (when the bacterial flora in the temporary storage box 42 is released into the biofilm mechanism 6). When the water pump is started, in order to avoid the pressure surge caused by the water flow entering and the increase in pressure at the release hole 635, when the pressure in the temporary storage box 42 increases, the protrusion 73 structure can be lifted up, and the protrusion 73 automatically lifts up to expose a larger area of ​​the strip opening 72 as a pressure relief hole. When the pressure stabilizes, the protrusion 73 falls under its own gravity, but due to the existence of the adjustment bolt 74, the air intake section 75 is still retained, so that the air slowly enters the transfer box 41 from the pressure relief hole, achieving a slow release effect on the supplementary bacterial flora.

[0060] like Fig.10 and Fig.11As shown, in some examples, further, a cleaning mechanism 8 is further provided in the transfer temporary storage mechanism 4, and the cleaning mechanism 8 is used to clean the biological salt-tolerant denitrifying bacteria sludge attached to the inner wall of the transfer box 41 and the temporary storage box 42; the cleaning mechanism 8 includes: a water tank 81, a hose 82, a guide rail 83, a plurality of limit members 84, a moving frame 85, a plurality of side nozzles 86, a driving wheel 87 and a plurality of bottom nozzles 88; the water tank 81 is fixedly arranged at the middle position of the top end of the transfer box 41; the hose 82 is connected to the bottom end of the water tank 81 and is located in the inner cavity of the transfer box 41; the guide rail 83 is arranged in the inner cavity of the transfer box 41 parallel to the bottom wall of the transfer box 41; a plurality of limit members 84 are fixedly arranged in the temporary storage box 4 2; a movable frame 85 is movably arranged on the guide rail 83 through a driving device 89; a plurality of side nozzles 86 are fixedly arranged on the side wall of the movable frame 85 and are connected to the hose 82; a driving wheel 87 is rotatably arranged on the side wall of the movable frame 85 below the side nozzle 86 through a rotating shaft, and the position of the driving wheel 87 corresponds to that of the movable frame 85; a plurality of bottom nozzles 88 are fixedly connected to the bottom end of the rotating shaft of the driving wheel 87; wherein a torsion spring is sleeved on the end of the rotating shaft of the driving wheel 87 to keep the bottom nozzle 88 in an inclined state at an angle a by default, and the end of the limiter 84 is located on the extension line of the end of the temporary storage box 42 in the direction of angle a.

[0061] In some cases, salt-tolerant denitrifying bacteria are cultivated in the form of sludge, but the fluidity of sludge is poor. In the replenishment process of the biological purification tank 1, the salt-tolerant denitrifying bacteria are prone to adhere to the wall surface after passing through the transfer box 41 and the temporary storage box 42. If they are not cleaned in a short period of time, the salt-tolerant denitrifying bacteria will die and impurities will be formed after the residual substances are dried. The presence of impurities will block the replenishment channel between the temporary storage box 42 and the release hole 635 on the one hand, and on the other hand, if the impurities formed enter the biological purification tank 1 below, it will be difficult to decompose, increasing the burden on the overall wastewater treatment system. Therefore, in order to avoid this situation and reduce the difficulty of cleaning, a cleaning mechanism 8 is further provided in this example. The cleaning mechanism 8 is mainly used to clean the salt-tolerant denitrifying bacteria sludge remaining in the transfer box 41 and the temporary storage box 42 after the salt-tolerant denitrifying bacteria are replenished, so that they can be fully released to the biological fillers at the corresponding positions to complete the biofilm operation.

[0062] It should also be noted that, in this example, due to the large difference between the environment in the biological culture pool 3 and the environment in the biological purification pool 1, if the salt-tolerant denitrification bacteria are suddenly added to the biological purification pool 1, some of the salt-tolerant denitrification bacteria may not adapt to the environment, resulting in poor activity and poor biofilm effect. Therefore, in order to further ensure the activity of the salt-tolerant denitrification bacteria added to the biological purification pool 1, the cleaning mechanism 8 provided in this example can also be used to release the liquid activator to avoid the problem of poor purification effect of the salt-tolerant denitrification bacteria that suddenly enter the biological pool due to environmental differences; by using the liquid activator, it can maintain its activity and be smoothly released onto the biological filler.

[0063] In the specific working process, firstly, clean water source or liquid activator is poured into the water tank 81. After completing the supplement of salt-tolerant denitrifying bacteria in the biological purification pool, the driving device 89 is started. Under the action of the driving device 89, the moving frame 85 is driven to move in the inner cavity of the transfer box 41, wherein the water source or liquid activator in the water tank 81 flows into the moving frame 85 through the hose 82, and is sprayed out through the multiple side nozzles 86 and the bottom nozzle 88 on the moving frame 85, thereby completing the cleaning of the inner wall of the transfer box 41. Since the transfer temporary storage mechanism 4 also includes multiple temporary storage boxes 42, each temporary storage box 42 may also have salt-tolerant denitrifying bacteria attached to the inner wall. Therefore, the device is further provided with a driving wheel 87 and a limiting member 84 matched with the driving wheel 87, wherein the driving wheel 87 can be a gear, and the limiting member 84 is a rack matched with the gear. In the process of moving the moving frame 85, the inclined water flow sprayed by the bottom nozzle 88 with an inclination angle a The water jet from the bottom nozzle 88 is preferably directed toward the end of one side of the opening of the temporary storage box 42 on the front side of the moving direction. At the same time, since the end of the limiting member 84 is located on the extension line of the end of the temporary storage box 42 in the direction of angle a, the driving wheel 87 will also engage with the limiting member 84 while the water jetted from the bottom nozzle 88 is facing the end of one side of the top opening of the temporary storage box 42. As the moving frame 85 continues to move, driven by the driving wheel 87 and the limiting member 84, the entire driving wheel 87 and the bottom nozzle 88 rotate around the axis of the rotating shaft of the driving wheel 87. The rotated bottom nozzle 88 will gradually turn to the other side of the opening of the temporary storage box 42, and then after being separated from the limiting member 84, all the bottom nozzles 88 will restore the angle a under the rotation of the torsion spring. In this process, the water jetted from the bottom nozzle 88 will completely pass through the entire inner wall of the temporary storage box 42, thereby achieving a deep cleaning effect on the interior of the transfer temporary storage mechanism 4, and helping the salt-tolerant denitrification bacteria to maintain activity, thereby ensuring the wastewater treatment effect of the device.

[0064] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A wastewater purification device based on activation of salt-tolerant denitrifying bacteria, comprising a biological purification pool, wherein the biological purification pool is provided with salt-tolerant denitrifying bacteria to carry out biological purification of wastewater, It is characterized in that Also includes: A biological culture pool is provided with salt-tolerant denitrifying bacteria that are continuously cultivated, and the biological culture pool is used to provide salt-tolerant denitrifying bacteria to the biological purification pool; A biofilm mechanism is arranged in the biological purification tank to provide continuous purification of water quality; A transfer temporary storage mechanism, wherein the output end of the transfer temporary storage mechanism is connected to the biofilm mechanism, and the input end of the transfer temporary storage mechanism is connected to the biological culture pool; An air intake control mechanism, arranged on the transfer temporary storage mechanism, for adjusting the speed at which the salt-tolerant denitrifying bacteria in the transfer temporary storage mechanism are released into the biofilm mechanism; The temporary transfer storage institution includes: A transfer box is arranged above the biological purification pool, an air intake gap is left between the biological purification pool and the transfer box, and the transfer box is in a closed state; A plurality of temporary storage boxes are fixedly arranged at the bottom end of the transfer box, and the top openings of the temporary storage boxes are connected to the inner cavity of the transfer box; A recovery pipe, one end of which is connected to the bottom of the transfer box, and the other end of which is connected to the inner cavity of the biological culture pool, wherein a one-way valve is provided in the recovery pipe; A water inlet pipe, one end of which is connected to the outlet of the water pump in the biological culture pool, and the other end of which is connected to the inlet of the transfer box; The bottom end of the transfer box is an inclined surface, the inlet side of the transfer box is higher than the side connected to the recovery pipe, the water inlet side of the biological purification pool corresponds to the inlet side of the transfer box, and the recovery pipe connection side of the transfer box corresponds to the drainage side of the biological purification pool; An aeration mechanism is also provided in the biological purification pool, and the aeration mechanism comprises: An aeration main pipe runs through the biological purification tank, and the outer end of the aeration main pipe is connected to an aeration pump; A plurality of aeration branch pipes are fixedly arranged at equal intervals on the bottom of the biological purification tank, and the plurality of aeration branch pipes are all connected to the aeration main pipe; A plurality of aeration nozzles are fixedly arranged at equal intervals on the outer wall of the top end of the aeration branch pipe, and are used to aerate the biological purification pool; The biofilm mechanism comprises: A plurality of hoisting rods are fixedly hoisted at the bottom end of the temporary storage box, the inner cavity of the hoisting rods is hollow, and the inner cavity of the hoisting rods is connected with the inner cavity of the temporary storage box; A plurality of connecting cross bars are fixedly connected to the outer wall of the hoisting rod at equal intervals, and a conveying channel is arranged in the inner cavity of the connecting cross bars; A plurality of film-forming plates are fixedly installed on the outer wall of the connecting cross bar at equal intervals, and the plurality of film-forming plates are parallel to the flow direction of the wastewater; A plurality of biofilm fillers, one end of which is fixedly connected to two outer walls of the biofilm plate on the side parallel to the water flow direction, and the biofilm fillers are flexible fillers; The film-hanging plate comprises: plate body; A primary connecting pipe is arranged in the middle of the plate body, and the middle of the primary connecting pipe is connected with the conveying channel; A plurality of secondary connecting pipes are arranged in the inner cavity of the plate body and are connected to both sides of the primary connecting pipe; A plurality of third-level connecting pipes are arranged in the inner cavity of the plate body and are connected to both sides of each of the second-level connecting pipes; A plurality of release holes, each of which is formed through the plate body and is connected to the three-stage connecting pipe; The root of the biofilm filler is buckled on the outside of the release hole, and the release hole is opened obliquely in the direction of water flow; each of the release holes is connected to at least two of the three-level connecting pipes.

2. The wastewater purification device based on activation of salt-tolerant denitrifying bacteria according to claim 1, It is characterized in that The transfer temporary storage mechanism is also provided with a cleaning mechanism, which is used to clean the transfer box and the salt-tolerant denitrifying bacteria attached to the inner wall of the temporary storage box; the cleaning mechanism includes: A water tank, fixedly arranged at the middle of the top end of the transfer box; A hose connected to the bottom end of the water tank and located in the inner cavity of the transfer box; A guide rail, arranged in the inner cavity of the transfer box parallel to the bottom wall of the transfer box; A plurality of limiters are fixedly arranged on the side wall surface of the inner cavity of the transfer box above the temporary storage box; A moving frame, which is movably arranged on the guide rail by a driving device; A plurality of side nozzles are fixedly arranged on the side wall of the movable frame and are connected to the hose; A driving wheel, which is rotatable via a rotating shaft and is disposed on the side wall of the moving frame below the side nozzle, and the position of the driving wheel corresponds to that of the moving frame; A plurality of bottom nozzles are fixedly connected to the bottom end of the rotating shaft of the driving wheel; Among them, a torsion spring is sleeved on the end of the rotating shaft of the driving wheel to keep the bottom nozzle in a tilted state at an angle a by default, and the end of the limit member is located on the extension line of the end of the temporary storage box in the direction of angle a.

3. The wastewater purification device based on activation of salt-tolerant denitrifying bacteria according to claim 1, Features: The air intake control mechanism comprises: An air intake cylinder is fixedly mounted on the top outer wall of the transfer box; A strip-shaped opening is provided through the outer wall of the air inlet cylinder; A protrusion is movable along the length direction of the air inlet cylinder and is clamped in the air inlet cylinder, and the outer end of the protrusion protrudes from the air inlet cylinder through the strip-shaped opening; the protrusion provides different degrees of sealing and shielding for the strip-shaped opening; An adjusting bolt, screwed on the outer end of the protrusion, the bottom end of the adjusting bolt abuts against the outer wall of the transfer box; The air intake section is arranged in the strip-shaped opening which is not blocked below the protrusion.

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