Precise low-consumption denitrification and dephosphorization filler-loaded biological reaction device

Abstract

The application discloses a precise low-consumption denitrification and dephosphorization filler-loaded biological reaction device, and belongs to the field of sewage treatment. A baffle plate and a screen are arranged in a box body. The baffle plate is connected with the screen at one end of the box body, the screen is connected with the box body, and the movable microbial-loaded filler is suspended between the baffle plates. Two specific microorganisms are loaded on the filler. An aeration head is arranged on the bottom of the box body and the baffle plate. The aeration head provides oxygen for the growth and reproduction of the microorganisms, drives the filler to move in suspension in water, and makes the filler fully contact with water flowing through the device. The baffle plate and the screen cooperate to increase the hydraulic retention time in continuous treatment in limited space. The aeration direction keeps the filler moving, avoids the accumulation of the filler at the screen, and is beneficial to reducing the resistance of sewage flow. In combination with an optimized control means, the accurate control of the aeration amount is realized. In addition, the partition-regulated aeration control can precisely and low-consumption strengthen denitrification and dephosphorization, and maintain the suspension and rolling of the filler.

Description

TECHNICAL FIELD

[0001] The present application relates to a precise low consumption denitrification and dephosphorization filler load type biological reaction device, belonging to the field of wastewater treatment. BACKGROUND

[0002] The main difficulty in treating urban sewage is to continuously and stably, efficiently and lowly consume reduce total phosphorus, total nitrogen and ammonia nitrogen of sewage, and avoid water body eutrophication. The currently more mature method is A²O process (anaerobic-anoxic-aerobic). The process uses microorganisms in activated sludge to realize denitrification and dephosphorization of sewage in a biochemical tank. In operation, part of the sludge in the secondary sedimentation tank is returned to the biochemical tank to supplement active microorganisms for the system. However, due to the need for a large land area for the activated sludge method with the biochemical tank and the secondary sedimentation tank, some small sewage treatment stations or are limited by the site, or due to the small daily treatment capacity, if a complete biochemical tank and an independent secondary sedimentation tank are set, the investment per ton of water and the treatment cost are increased. In the case of insufficient space, discontinuous inflow and large flow variation, a sequencing batch reactor (SBR) with similar principle is used for sewage treatment. However, intermittent treatment leads to the system stability being easily affected by the inflow water quality fluctuation, and the microorganisms are easily lost. Therefore, whether it is the traditional A²O process or the sequencing batch reactor, the number of active microorganisms in the biochemical tank may fluctuate during operation, thereby causing the fluctuation of the removal effect of pollutants in water. Therefore, it is necessary to use methods including increasing fillers to ensure the stability of active organisms in the biochemical section and promote the growth of active microorganisms on the surface of fillers, so as to realize the continuous and stable removal of pollutants.

[0003] In the actual project of using fillers for aerobic treatment of sewage, the commonly used suspended filler materials are mainly high-density polyethylene (HDPE) or polyurethane (PU), which have the problems of slow biofilm formation effect and unstable biofilm formation amount. Aerobic treatment of sewage requires setting an aeration device to supply oxygen to the biochemical section, and aeration is the main source of electric energy consumption in the sewage treatment process. However, the existing sewage treatment process has the problem of excessive aeration, and accurate aeration is not performed according to the inflow and outflow concentrations of pollutants, so as to realize the removal of pollutants while reducing the energy consumption of the sewage treatment device. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the present application provides a precise low consumption denitrification and dephosphorization filler load type biological reaction device, which is not easy to lose microorganisms, is suitable for continuous treatment, is not easy to be affected by water quality fluctuation, and has small working energy consumption and operation and maintenance difficulty.

[0005] The technical scheme adopted by the present application to solve its technical problems is:

[0006] The application discloses a filler-loaded biological reaction device for precise and low-consumption nitrogen and phosphorus removal, which comprises an aerobic section box, baffles and a screen are arranged in the aerobic section box, at least part of the baffles are connected with one end of the screen away from the aerobic section box, the other end of the screen is connected with the aerobic section box, the baffles are suspended with free-moving fillers, the fillers are loaded with microorganisms, an aeration head for blowing the fillers is arranged in the aerobic section box, and the fillers account for 20-40% of the volume of the aerobic section box.

[0007] The filler-loaded biological reaction device for precise and low-consumption nitrogen and phosphorus removal provided by the application rationally configures the baffle and screen structure, so that water flow can fully contact the microorganisms on the fillers, thereby effectively promoting the removal of nitrogen and phosphorus. The fillers provide more attachment space and growth conditions for the microorganisms, increase the concentration of active microorganisms in the reaction tank, and thus improve the efficiency of sewage treatment; the aeration head makes the aerobic biodegradation process more efficient, improves the oxygen transfer efficiency, ensures the high activity of the microorganisms, and promotes the removal of organic matters; the design of the baffles not only enables the water flow to maintain a certain flow rate and distribution, avoids water flow dead angles, but also ensures that the space of the reactor is better utilized; the cooperation of the baffles, the screen and the aeration direction makes the fillers in a suspended and rolling motion state and prevents the fillers from migrating to the downstream or accumulating on the screen.

[0008] Further, the microorganisms comprise Pseudomonas and Aeromonas.

[0009] Pseudomonas and Aeromonas have good nitrogen and phosphorus removal capacity, which helps to improve the nitrogen and phosphorus removal efficiency of the system and strengthen the sewage treatment effect.

[0010] Further, the fillers are polyurethane porous fillers.

[0011] The polyurethane porous fillers with density equivalent to or close to that of water are used as the loading medium, have good specific surface area and pore structure, can provide a large attachment surface for the growth of microorganisms, enhance the suspension and stability of the fillers, promote the contact between the microorganisms in the reactor and the sewage, and improve the effect of sewage treatment.

[0012] Further, the way of loading the microorganisms on the fillers comprises the following steps: contacting a suspension or culture solution of the microorganisms with the surface of the fillers so that the fillers adsorb the microorganisms, and then immobilizing the microorganisms; or soaking the fillers in a solution containing the microorganisms, and then immobilizing the microorganisms; or injecting a solution containing the microorganisms into the fillers, and then immobilizing the microorganisms.

[0013] The microorganism loading mode of the filler is achieved by adsorption, soaking or injection, etc. so that the microorganism can be firmly attached to the surface or inside of the filler, thereby effectively preventing the loss of microorganism and improving the stability and efficiency of the system. This mode ensures the colonization of microorganism on the filler, so that it can play a long-term stable effect in wastewater treatment.

[0014] Further, the baffle plate includes an upper baffle plate with a top end connected to the aerobic tank and a bottom end separated from the aerobic tank, and a lower baffle plate with a bottom end connected to the aerobic tank and a top end separated from the aerobic tank, the upper baffle plate and the lower baffle plate are alternately arranged in the aerobic tank according to the water flow direction.

[0015] The baffle plate is alternately arranged in the aerobic tank according to the water flow direction, which can effectively prolong the flow path of wastewater in the aerobic tank and increase the hydraulic retention time. This structure improves the contact time between wastewater and microorganisms, thereby optimizing the denitrification and phosphorus removal process and improving the wastewater treatment effect.

[0016] Further, the lower end of the screen is connected to the top end of the lower baffle plate, and the upper end of the screen is connected to the top of the aerobic tank.

[0017] The position of the screen is designed to better control the position of the filler when the water flows, preventing the filler from being lost due to too fast water flow. The cooperation of the screen and the baffle plate effectively intercepts the downstream migration of the filler, while ensuring that the microorganism is fixed on the filler, thereby ensuring the long-term stability of the biological treatment function of the microorganism.

[0018] Further, the screen includes a top screen, two side screens and an inclined screen, the two sides of the inclined screen are connected to one of the side screens, the upper edge of the inclined screen is connected to the top screen, the two sides of the top screen are connected to the upper edge of one of the side screens, and the inclined screen is inclined to one side of the water inlet of the lower baffle plate. The screen aperture is 0.8cm-1cm. This structure helps to avoid the accumulation of filler at the screen, maintains the good suspended state of the filler, and improves the biological treatment capacity of the system.

[0019] Further, the aeration head is arranged at the bottom of the aerobic tank and on the baffle plate, the aerobic tank is provided with a sludge concentration sensor, the inlet of the aerobic tank is provided with an inlet ammonia nitrogen concentration sensor and an inlet organic matter concentration sensor, the outlet of the aerobic tank is provided with an outlet ammonia nitrogen concentration sensor and an outlet organic matter concentration sensor, and the aeration head is connected to a blower, the blower provides air volume for the aeration head according to the signals of the dissolved oxygen sensor, the sludge concentration sensor, the inlet ammonia nitrogen concentration sensor, the inlet organic matter concentration sensor, the outlet ammonia nitrogen concentration sensor and the outlet organic matter concentration sensor.

[0020] Further, each partition between adjacent baffles is set with a dissolved oxygen concentration sensor, when the dissolved oxygen concentration in a certain partition is less than or equal to 1.5 mg / L, all aeration heads in the partition are opened, when the dissolved oxygen concentration is greater than 1.5 mg / L, the aeration heads at the bottom of the aerobic section tank are partially closed, and the aeration heads on the baffles are kept open.

[0021] Further, the angle between the aeration direction of the aeration head and the horizontal plane is 90°-30°, which can better adjust the airflow direction, promote the suspension and movement of the filler, and avoid the accumulation of the filler at a certain position. This design ensures the rotation state of the filler in water, thereby enhancing the contact efficiency of the filler and the sewage and improving the treatment capacity of the sewage.

[0022] Further, the aeration hole of the aeration head has a diameter of 1 mm-10 mm.

[0023] The beneficial effects of the present application are: the present application utilizes the suspended biological load type filler, and the aeration head is arranged at the bottom of the tank and the baffle, which not only supplies oxygen for the growth and reproduction of microorganisms, but also drives the filler to suspend and move in water, so that the filler is in full contact with the water flowing through the aerobic section tank, thereby enhancing the biological reaction; the baffle and the screen cooperate in a limited space to prolong the path of the sewage flowing through the aerobic section tank, improve the hydraulic retention time in the continuous treatment, and intercept the filler from migrating downstream, which is equivalent to dividing the aerobic section tank into multiple stages of fluidized bed, which is beneficial to improve the biological treatment efficiency; the microorganisms are loaded on the filler, and the baffle and the screen intercept the filler, so that the microorganisms are not easy to be lost; the aeration direction keeps the filler moving and avoids accumulation at the screen, which is beneficial to reduce the resistance of the sewage flow.

[0024] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and achieved by the structure particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure schematic view of a precise low-consumption denitrification and dephosphorization filler load type biological reaction device provided by the embodiment of the present application.

[0026] Figure 2 is a structure schematic view of a screen provided by the embodiment of the present application.

[0027] The figure mark: 1, aerobic section tank; 21, upper baffle; 22, lower baffle; 3, screen; 32, top net; 33, side net; 34, inclined net; 4, filler; 5, aeration head. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like component have the same or similar designations. The embodiments described below are presented by way of example only and are not intended to limit the present application as defined by the appended claims and their equivalents.

[0029] Referring to Figure 1 The present application provides a precise low-consumption denitrification and dephosphorization filler-loaded biological reaction device, which comprises an aerobic section box 1, baffles and a screen 3 are arranged in the aerobic section box 1, at least part of the baffles are connected with one end of the screen 3 away from the aerobic section box 1, the other end of the screen is connected with the aerobic section box 1, and the baffles are suspended with free-moving fillers 4, the fillers 4 are loaded with microorganisms, an aeration head 5 for blowing the fillers 4 is arranged in the aerobic section box 1, and the fillers account for 20%-40% of the volume of the aerobic section box 1, preferably 25%-30%.

[0030] The aerobic section box 1 can be improved on the basis of a common aerobic section for sewage treatment, vertical baffles are added to guide the formation of up-and-down baffling state, so that the residence time of the sewage in the reactor is increased without increasing the volume, the reaction time is increased, and the fillers 4 loaded with microorganisms can promote the removal effect of nitrogen, phosphorus and other pollutants in the sewage.

[0031] The purpose of this design is to increase the residence time of the sewage and make the sewage fully react with the fillers 4 loaded with microorganisms in the reaction device. The screen 3 can pass water but cannot pass the fillers 4, which is equivalent to fixing the fillers 4 in each partition, and also avoids that the fillers 4 are all stacked to the rear with the water flow.

[0032] The baffles can be made into telescopic baffles, which partially block the screen in the extended state, that is, the height of the baffle can be a range (such as 1 m-1.5 m), and the residence time is controlled according to the water flow change and the need for microbial growth. Under this filling rate, there is a relatively large free space between the fillers for free movement, and the aeration head 5 not only provides oxygen but also drives the fillers 4 in the suspended state to roll.

[0033] In the preferred embodiment, the microorganisms include Pseudomonas and Aeromonas. The fillers 4 are polyurethane porous fillers.

[0034] By adsorption embedding method, two bacteria (Pseudomonas and Aeromonas) with denitrification and phosphorus removal function can be loaded on the surface of polyurethane material to form a new carrier filler loaded with bacteria, and the filler is applied to the device, which is more conducive to the role of the filler in strengthening the removal of nitrogen and phosphorus pollutants in wastewater, and promotes, enhances and strengthens the removal of nitrogen and phosphorus pollutants in wastewater.

[0035] The commercially available polyurethane filler with density equal to or close to that of water can be used to load Pseudomonas and Aeromonas, such as commercially available polyurethane sponge filler with specifications of 2cm*2cm*2cm.

[0036] The previous modification of the filler is to change the physical or chemical properties of the filler. The embodiment of the application loads specific microorganisms. On the one hand, the two microorganisms can exist in nature, especially in a wastewater treatment system, and have denitrification and phosphorus removal function; on the other hand, the filler loaded with the two microorganisms can more quickly and efficiently increase the amount of microorganisms that can treat nitrogen and phosphorus pollutants in the wastewater treatment system. The two microorganisms added to the filler can act as "seeds" to more quickly promote the growth of denitrification and phosphorus removal microorganisms on the surface of the filler, thereby promoting the removal of nitrogen and phosphorus pollutants in wastewater.

[0037] Pseudomonas is a gram-negative bacterium, most of which is obligate aerobic and chemotrophic, and individual species can use hydrogen or carbon monoxide as energy to grow autotrophically. Their growth temperature range is 5-45℃, and the optimum growth temperature is about 30℃, and the optimum pH value is 7.0-8.5. Pseudomonas is generally straight or curved rod-shaped bacteria, and the cell size is (0.5x1.0) μm-(0.4x1.5) μm.

[0038] Aeromonas is aerobic or facultative anaerobic. The optimum growth temperature is 30℃, but it can grow at 0-45℃. The nutritional requirement is not high, and 1-3mm size, slightly white and translucent colonies can be formed on ordinary nutrient agar medium at 35℃ for 24-48h.

[0039] The use of the two microorganisms can simultaneously strengthen the removal of nitrogen and phosphorus pollutants in wastewater.

[0040] The separation and purification of the two microorganisms usually include the following steps:

[0041] Sample collection: collect samples from possible pollution sources (such as soil, water, plant surface, etc.).

[0042] Pretreatment: perform operations such as dilution, filtration, etc. on the collected sample to reduce the interference of miscellaneous bacteria.

[0043] Selection of medium: Choose appropriate medium for Pseudomonas based on its physiological characteristics, such as nutrient agar medium, potato-glucose agar medium, etc. These media can provide the necessary nutrients for the growth of Pseudomonas.

[0044] Inoculation and culture: Inoculate the pretreated sample onto the medium and incubate it at an appropriate temperature (such as 25-30°C) and humidity for a certain period of time (such as 24-48 hours).

[0045] Isolation and purification: Use methods such as streak isolation or dilution plating to isolate and purify individual colonies. During the purification process, repeated streak subculture is required to ensure the acquisition of pure strains.

[0046] Identification and preservation: After isolation and purification, identify the strain based on morphology, physiology, biochemistry, and molecular biology, and confirm it as Pseudomonas before preservation for subsequent research and use.

[0047] The method of immobilizing two microorganisms on polyurethane filler is adsorption, embedding, or a combination of the two methods. The main process is: pretreatment, soaking or penetration, and immobilization.

[0048] The steps and characteristics of adsorption method are as follows:

[0049] Pretreatment: First, properly pretreat the existing polyurethane material, such as cleaning, drying, etc., to ensure its surface is clean and free of impurities, and possibly perform certain surface modification to enhance its hydrophilicity or hydrophobicity, thereby improving the adsorption effect of microorganisms.

[0050] Microbial inoculation: Contact the target microbial suspension or culture solution with the polyurethane material, allowing the microbial cells to spontaneously adsorb onto the surface of the polyurethane material through electrostatic attraction, van der Waals force, or chemical bonds.

[0051] Immobilization: Control the appropriate conditions (such as temperature, pH, contact time, etc.) to allow the microbial cells to form a stable biofilm on the surface of the polyurethane material. In some cases, additional treatment (such as drying, cross-linking, etc.) may be required to enhance the immobilization effect of microorganisms.

[0052] Features: Simple operation, less impact on microbial activity. Suitable for relatively smooth polyurethane materials.

[0053] The steps and characteristics of embedding method are as follows:

[0054] Preparation of mixed solution: Mix microbial cells with a solution that is compatible with polyurethane material (which may be a solvent or prepolymer of polyurethane) uniformly.

[0055] Penetration or injection: the mixed solution penetrates into the interior or microporous structure of the polyurethane material by some means (such as soaking, injection, etc.).

[0056] Solidification: through appropriate condition control (such as temperature, humidity, etc.), the polyurethane material is solidified and the microbial cells are embedded.

[0057] The baffle plate includes an upper baffle plate 21 connected at the top end to the aerobic section box 1 and disconnected at the bottom end from the aerobic section box 1, and a lower baffle plate 22 connected at the bottom end to the aerobic section box 1 and disconnected at the top end from the aerobic section box 1. The upper baffle plate 21 and the lower baffle plate 22 are alternately arranged in the aerobic section box 1 according to the water flow direction.

[0058] From the process and the flow direction of the sewage treatment, the sewage realizes the plug flow state reaction process through the anaerobic section, the anoxic section and the aerobic section. The water flows through the above three stages in the process. The embodiment of the present application increases the baffle plate in the aerobic section, and each baffle plate is matched with a screen, so as to realize that the microbial-loaded filler is "fixed" between the baffle plates, thereby forming a separated and fixed state of the filler in the local, that is, only the water flows in the aerobic section, and the filler is "trapped" between the baffle plates in the aerobic section. In this way, the uniform distribution of the filler between the baffle plates is ensured.

[0059] As shown in Figure 1 , the lower end of the screen 3 is connected to the top end of the lower baffle plate 22, and the upper end of the screen 3 is connected to the top of the aerobic section box 1.

[0060] The aerobic section box increases the baffle plate, increases the residence time of the sewage in the device, the screen is increased at the top of the baffle plate, the filler is separated by the baffle plate in the aerobic section box, the filler is ensured to be in full contact with the sewage, and the microorganism is fully reacted with the pollutants in the water; the aeration head is swept to prevent the filler from accumulating at the tail with the water flow. The water outlet of the aerobic section box can also be provided with a screen to prevent the loss of the filler.

[0061] If the screen is an interception screen perpendicular to the water flow direction, it is easy to cause the filler to accumulate at the screen, increase the water flow resistance, and increase the energy consumption required to drive the sewage forward, and also affect the efficiency of biological treatment. Referring to Figure 2 , the preferred screen 3 includes a top screen 32, two side screens 33 and an inclined screen 34, the two sides of the inclined screen 34 are connected to one of the side screens 33, the upper edge of the inclined screen 34 is connected to the top screen 32, the two sides of the top screen 32 are connected to the upper edge of one of the side screens 33, and the inclined screen 34 is inclined to the side of the lower baffle plate 22. The screen has a certain angle with the vertical direction, which ensures that the filler does not accumulate under the action of the water flow.

[0062] Referring to Figure 1The aeration head is arranged at the bottom of the aerobic section box 1 and on the baffle. The aeration head arranged on the baffle in the embodiment can further promote the suspended state of the filler in the partition, and prevent the filler from accumulating at the tail. The aeration head at the position can optimize the air blowing and aeration, and ensure the required supply amount in the denitrification reaction. According to the dissolved oxygen measuring instrument installed in the device, if the aeration amount is too large and the dissolved oxygen reading is too high according to the set dissolved oxygen requirement, the aeration at the bottom of the aerobic section box 1 can be closed, and only the aeration head on the baffle can be opened, so as to maintain the rolling movement of the filler.

[0063] In some embodiments, the biological reaction device further comprises a controller, a dissolved oxygen sensor and a sludge concentration sensor are arranged in the aerobic section box, an influent ammonia nitrogen concentration sensor and an influent organic matter concentration sensor are arranged at the influent of the aerobic section box 1, an effluent ammonia nitrogen concentration sensor and an effluent organic matter concentration sensor are arranged at the effluent of the aerobic section box 1, and the aeration head is connected with a blower. The blower provides air volume for the aeration head according to the signals of the dissolved oxygen sensor, the sludge concentration sensor, the influent ammonia nitrogen concentration sensor, the influent organic matter concentration sensor, the effluent ammonia nitrogen concentration sensor and the effluent organic matter concentration sensor. That is, each sensor is signal-connected with the controller, and the blower is signal-connected with the controller. The controller instructs the working parameters of the blower according to the collected sensor signals.

[0064] In the formula, the oxygen supply amount O2=aQ(S0-Se)+bQ(Nt-Ne)+cQM, the air volume provided is equal to the oxygen supply amount divided by the oxygen concentration in air.

[0065] a is an organic matter oxygen demand reaction parameter, and the value range is 0.1-0.7. The specific value is determined according to historical data.

[0066] b is an ammonia nitrogen oxygen demand reaction parameter, and b=4.57.

[0067] c is a sludge self-oxidation oxygen demand reaction parameter, and the value range is 0.1-0.2. The specific value is determined according to historical data.

[0068] Q is the water quantity of sewage treatment, which is provided by the total influent end of the sewage treatment system and is not measured in the aerobic section box.

[0069] S0 is the influent concentration of organic matter.

[0070] Se is the effluent concentration of organic matter.

[0071] Nt is the influent concentration of ammonia nitrogen.

[0072] Ne is the effluent concentration of ammonia nitrogen.

[0073] M is the sludge concentration in the aerobic section tank.

[0074] In a more preferred embodiment, each partition is formed between adjacent baffles, and a dissolved oxygen concentration sensor is arranged in each partition. When the dissolved oxygen concentration in a certain partition is less than or equal to 1.5 mg / L, all the aeration heads in the partition are opened. When the dissolved oxygen concentration is greater than 1.5 mg / L, the aeration heads at the bottom of the tank in the aerobic section are partially closed, and the aeration heads on the baffles are kept open. This control mode is conducive to keeping the dissolved oxygen concentration in the tank in a suitable range and maintaining the rolling of the filler at a minimum level without wasting energy.

[0075] Water quality sensors such as dissolved oxygen (DO), ammonia nitrogen (NH3-N), organic matter (COD), and sludge concentration (MLSS) are installed in the aeration tank to collect real-time data of dissolved oxygen, ammonia nitrogen, and COD, and dynamically adjust the air supply of the blower. This is conducive to keeping the dissolved oxygen concentration in the aerobic section at 1 mg / L ~1.5 mg / L, the ammonia nitrogen concentration at the tail of the aerobic section at no more than 5 mg / L, and the organic matter concentration at no more than 30 mg / L with low energy consumption.

[0076] Specifically, the angle between the aeration direction of the aeration head 5 at the bottom of the aerobic section tank 1 and the horizontal plane is 90°~30°, which can be arranged in a circumferential distribution. The aeration direction of the central aeration head is perpendicular to the horizontal plane. From the center outward, the angle between the aeration direction of the aeration head and the horizontal plane becomes smaller and smaller. The aeration direction of the outermost aeration head is 60° to the baffle and 30° to the horizontal plane, which can form a spiral airflow and further avoid filler accumulation. More preferably, the aeration head arranged on the lower baffle is located on the upstream side of the lower baffle, and the aeration direction is obliquely upward, which is conducive to making the filler collectively circulate and roll between the baffles, and ensuring that the filler can also roll and rotate at a minimum level when only the aeration heads on the baffles are opened.

[0077] The pore size of the aeration holes of the aeration head can be as small as 1 mm and as large as no more than 10 mm, which can improve the mass transfer efficiency of oxygen, ensure the suspended state of the filler, ensure the rotational movement of the filler loaded with two types of microorganisms in the partition, fully contact the filler with sewage, increase the reaction efficiency, and prevent the filler from accumulating with the water flow and adhering to the baffles.

[0078] The present application artificially adjusts the microorganisms for removing nitrogen and phosphorus in sewage to increase the removal effect, and optimizes the structure of the aerobic section. Through baffling, aeration, interception, and other measures, suitable reaction conditions are created for the filler loaded with microorganisms, and the removal effect of the entire device on pollutants is increased.

[0079] In the description of the specification, the description of the term "one embodiment" "certain embodiments" "illustrative embodiment" "example" "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can also make a number of improvements and refinements, these improvements and refinements are also considered to be within the scope of the present application.

Claims

1. A filler-loaded biological reaction device for precise low-consumption denitrification and dephosphorization, comprising an aerobic section box (1), characterized in that, The baffle plate is connected with one end of the screen (3) at one end away from the aerobic tank (1), and the other end of the screen is connected with the aerobic tank (1), and the movable filler (4) is suspended between the baffle plates, the filler (4) is loaded with microorganisms, and the aerobic tank (1) is provided with an aeration head (5) for blowing the filler (4), and the filler accounts for 20%-40% of the volume of the aerobic tank; The aeration head is arranged at the bottom of the aerobic tank (1) and on the baffle plate; The baffle plate includes an upper baffle plate (21) connected with the top of the aerobic tank (1) and away from the bottom of the aerobic tank (1), and a lower baffle plate (22) connected with the bottom of the aerobic tank (1) and away from the top of the aerobic tank (1), and the upper baffle plate (21) and the lower baffle plate (22) are alternately arranged in the aerobic tank (1) according to the water flow direction; The aeration head arranged on the lower baffle plate is located on the upstream side of the lower baffle plate, and the aeration direction is inclined upward.

2. The precise low consumption denitrification and dephosphorization filler loaded biological reaction device according to claim 1, characterized in that, The microorganisms loaded on the filler include Pseudomonas and Aeromonas.

3. The precise low consumption denitrification and dephosphorization filler loaded biological reaction device according to claim 1, characterized in that, The filler (4) is a polyurethane porous filler.

4. The precision low consumption denitrification and dephosphorization filler loaded biological reaction device according to claim 3, characterized in that, The method for loading the microorganisms on the filler (4) includes: contacting the suspension or culture solution of the microorganisms with the surface of the filler (4) to enable the filler (4) to adsorb the microorganisms, and then immobilizing the microorganisms; or soaking the filler (4) in a solution containing the microorganisms, and then immobilizing the microorganisms; or injecting a solution containing the microorganisms into the filler (4), and then immobilizing the microorganisms.

5. The precise low-cost denitrification and dephosphorization filler-loaded biological reaction device according to claim 1, characterized in that, The lower end of the screen (3) is connected with the top end of the lower baffle plate (22), and the upper end of the screen (3) is connected with the top of the aerobic tank (1).

6. The precision low-cost denitrification and dephosphorization filler loaded biological reaction device according to claim 5, characterized in that, The screen (3) includes a top screen (32), two side screens (33) and an inclined screen (34), the two sides of the inclined screen (34) are connected with one of the side screens (33), the upper edge of the inclined screen (34) is connected with the top screen (32), the two sides of the top screen (32) are connected with the upper edges of one of the side screens (33), and the inclined screen (34) is inclined to the side of the lower baffle plate (22) where water comes from.

7. The low cost precision denitrification and dephosphorization packed bio-reactor device according to claim 1, wherein, Each partition is provided with a dissolved oxygen concentration sensor, the aerobic tank (1) is provided with a sludge concentration sensor, the water inlet of the aerobic tank (1) is provided with an inlet ammonia nitrogen concentration sensor and an inlet organic matter concentration sensor, the water outlet of the aerobic tank (1) is provided with an outlet ammonia nitrogen concentration sensor and an outlet organic matter concentration sensor, the aeration head is connected with a blower, the blower provides air volume for the aeration head according to the signals of the dissolved oxygen sensor, the sludge concentration sensor, the inlet ammonia nitrogen concentration sensor, the inlet organic matter concentration sensor, the outlet ammonia nitrogen concentration sensor and the outlet organic matter concentration sensor; when the dissolved oxygen concentration in a certain partition is less than or equal to 1.5 mg / L, all the aeration heads in the partition are opened, when the dissolved oxygen concentration is greater than 1.5 mg / L, the aeration heads at the bottom of the aerobic tank in the partition are partially closed, and the aeration heads on the baffle are kept open.

8. The low cost precision denitrification and dephosphorization packed bio-reactor device according to claim 1, wherein, The aeration hole of the aeration head (5) has a diameter of 1 mm-10 mm.

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