Sulfur autotrophic denitrification filter tank device driven by suspended packed bed

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a sulfur autotrophic denitrification filter tank device driven by a suspended packed bed. The sulfur autotrophic denitrification filter tank device comprises a regulating tank, a sulfur autotrophic denitrification biological filter tank and a sedimentation tank which are communicated in sequence; the adjusting tank is used for homogenizing the wastewater; a suspended sulfur autotrophic denitrification biological filler is arranged in the sulfur autotrophic denitrification biological filter, and the sulfur autotrophic denitrification biological filter is used for performing a sulfur autotrophic denitrification reaction to remove nitrate nitrogen in the wastewater; the sulfur autotrophic denitrification biofilter is also connected with a sulfur autotrophic denitrification dosing tank; the settling pond is used for standing and settling the wastewater; a water outlet for discharging treated wastewater is formed in the top of the sedimentation tank. According to the utility model, the suspended biological filler is combined with the sulfur autotrophic denitrification reagent, and the suspended sulfur autotrophic denitrification biological filler is arranged in the sulfur autotrophic denitrification biological filter, so that the mass transfer efficiency can be improved, and the deep removal of nitrate nitrogen in wastewater is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a sulfur autotrophic denitrification filter device driven by a suspended filler bed. Background Art

[0002] Nitrate is a nitrogen oxide that is ubiquitous in nature. When nitrate concentrations in water exceed a certain limit, it can lead to eutrophication, excessive algae growth, and severely impact photosynthesis in aquatic plants, damaging aquatic ecosystems and the survival of aquatic life.

[0003] When nitrate enters the human body, it is converted into compounds such as nitrite and nitrosamide. These compounds can react with amine compounds in the stomach to form nitroso compounds, which are detrimental to human health. Excessive nitrate can also impair iron absorption, lower hemoglobin levels, and contribute to chronic conditions such as anemia. Therefore, we must pay close attention to the impact of nitrate on human health and strengthen monitoring and control of nitrates.

[0004] Physical separation, chemical reduction and other physicochemical methods are hot areas of research in nitrate removal processes, and they can achieve stable and efficient removal of nitrate. However, the above processes all have problems such as high operating costs, complex processes, and the risks of the reagents used. Therefore, large-scale sewage treatment plants still mainly use the denitrification process section in traditional biochemical processes to achieve nitrate removal. However, with the increasingly stringent sewage discharge standards, the C / N ratio of urban wastewater in my country, especially in the effluent of secondary processes, has a continuous downward trend. Therefore, there is usually a lack of carbon source in the denitrification step, and additional carbon sources need to be added as electron donors to ensure the smooth progress of the denitrification process. This will not only greatly increase the cost of wastewater treatment, but may also lead to higher sludge production and carbon emissions. At the same time, some organic carbon sources can combine with chloride ions to form toxic organic compounds, such as trihalomethanes (THMs) and haloacetic acids (HAAs), which threaten the ecological safety of the downstream. Based on the above background, the use of autotrophic bacteria using inorganic elements as electron donors to carry out denitrification reactions has gradually become a method for reducing nitrate nitrogen (NO3 - -N) emissions is an attractive option.

[0005] Sulfur autotrophic denitrification process (SAD) is a process that can utilize elemental sulfur (S 0 ), sulfide (S 2- ), thiosulfate (S2O3 2- ), thiocyanate (SCN - ) and other cheap reducing sulfur elements as electron donors, NO3 --N is converted into N2 biological process. It can be used not only as a separate process, but also as a supplementary process for traditional denitrification to reduce the overall operating cost of the process. This process is highly efficient, environmentally friendly and has low operating costs. It is very suitable for treating NO3 in wastewater lacking organic carbon sources. - -N.

[0006] Due to the chemical synthesis of S 0 With the advantages of low price, easy handling and transportation, it is the most commonly used electron donor in sulfur autotrophic denitrification process. 0 It has the characteristics of powdery, high density, and strong hydrophobicity, which results in a low mass transfer efficiency between it and activated sludge, affecting the NO3 - -N removal effect.

[0007] In view of this, the present utility model is proposed. Utility Model Content

[0008] The purpose of the utility model is to provide a sulfur autotrophic denitrification filter device driven by a suspended filler bed. By combining the suspended biological filler with the sulfur autotrophic denitrification reagent, the suspended sulfur autotrophic denitrification biological filler is arranged in the sulfur autotrophic denitrification biological filter, which can significantly improve the mass transfer efficiency and achieve NO3 - -N for depth removal.

[0009] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are adopted:

[0010] The utility model provides a sulfur autotrophic denitrification filter device driven by a suspended filler bed, comprising a regulating tank, a sulfur autotrophic denitrification biological filter and a sedimentation tank which are sequentially connected along the flow direction of wastewater; wherein the regulating tank is provided with a water inlet for inputting wastewater, and the regulating tank is used to homogenize the wastewater; a suspended sulfur autotrophic denitrification biological filler is provided inside the sulfur autotrophic denitrification biological filter; the suspended sulfur autotrophic denitrification biological filler is used to provide nutrients for activated sludge and provide a place for the activated sludge to attach, so that a sulfur autotrophic denitrification reaction occurs to remove nitrate nitrogen in the wastewater; the sulfur autotrophic denitrification biological filter is also connected to a sulfur autotrophic denitrification dosing box, and the sulfur autotrophic denitrification dosing box is used to store a mixed reagent containing inorganic alkali and nutrient elements; the sedimentation tank is used to statically precipitate the treated wastewater to separate mud and water; and a water outlet is provided on the top of the sedimentation tank, and the water outlet is used to discharge the treated wastewater.

[0011] Furthermore, it also includes an electric control cabinet, which is used to control the working status of each unit in the sulfur autotrophic denitrification filter device.

[0012] Furthermore, the bottom of the regulating tank is connected to the sulfur autotrophic denitrification biological filter through a pipeline via an inlet pump and an inlet flow meter; wherein the inlet pump and the inlet flow meter are used to jointly regulate the inlet flow of the wastewater entering the sulfur autotrophic denitrification biological filter.

[0013] Furthermore, a first stirring device is provided in the regulating tank, and the first stirring device is used to stir the wastewater in the regulating tank.

[0014] Furthermore, a plug flow agitator is provided at the bottom of the sulfur autotrophic denitrification biological filter, and the plug flow agitator is used to stir the wastewater in the sulfur autotrophic denitrification biological filter.

[0015] Furthermore, the bottom of the sulfur autotrophic denitrification biological filter is connected to the sulfur autotrophic denitrification dosing tank through a pipeline via a dosing pump, and the dosing pump is used to transport the mixed reagent containing inorganic alkali and nutrient elements into the sulfur autotrophic denitrification biological filter.

[0016] Furthermore, a second stirring device is provided in the sulfur autotrophic denitrification dosing box, and the second stirring device is used to stir the mixed reagent containing the inorganic base and the nutrient elements in the sulfur autotrophic denitrification dosing box.

[0017] Furthermore, a sludge return port and a sludge discharge port are provided at the bottom of the sedimentation tank; wherein the sludge return port is connected to the bottom of the sulfur autotrophic denitrification biological filter tank through a pipeline via a sludge return pump; the sludge discharge port is used to discharge sludge residue.

[0018] Furthermore, the suspended sulfur autotrophic denitrification biological filler includes a hollow spherical plastic material filler and a sulfur autotrophic denitrification reagent arranged inside the hollow spherical plastic material filler.

[0019] Furthermore, the sulfur autotrophic denitrification reagent includes granular sulfur.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) The utility model provides a sulfur autotrophic denitrification filter device driven by a suspended filler bed. By combining the suspended biological filler with the sulfur autotrophic denitrification reagent, the suspended sulfur autotrophic denitrification biological filler is set in the sulfur autotrophic denitrification biological filter, which can significantly improve the mass transfer efficiency between the microbial flora and the sulfur autotrophic denitrification reagent and other nutrients, and realize the reduction of NO3 in wastewater through sulfur autotrophic denitrification technology. - -N is highly efficient and deep removed.

[0022] (2) The sulfur autotrophic denitrification filter device driven by the suspended filler bed provided by the utility model has low operating cost, simple structure, high degree of automation, strong operability, is not prone to secondary pollution, and is easy to promote and use.

[0023] (3) The utility model provides a sulfur autotrophic denitrification filter device driven by a suspended filler bed, wherein the suspended sulfur autotrophic denitrification biological filler can be replaced in time according to consumption, without causing waste and is not easy to clog. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural schematic diagram of a sulfur autotrophic denitrification filter device driven by a suspended filler bed provided by the utility model.

[0026] Reference numerals:

[0027] 1-regulating tank; 11-water inlet; 12-water inlet pump; 13-water inlet flowmeter; 14-first stirring device; 2-sulfur autotrophic denitrification biological filter; 21-suspended sulfur autotrophic denitrification biological filler; 22-plug flow agitator; 23-dosing pump; 3-sedimentation tank; 31-water outlet; 32-sludge return outlet; 33-sludge return pump; 34-sludge discharge outlet; 4-sulfur autotrophic denitrification dosing box; 41-second stirring device; 5-electric control cabinet. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] The utility model provides a sulfur autotrophic denitrification filter device driven by a suspended filler bed, which mainly realizes the deep removal of nitrates in wastewater through sulfur autotrophic denitrification technology, and at the same time uses the suspended sulfur autotrophic denitrification biological filler 21 to improve the mass transfer efficiency between microbial flora and nutrients such as sulfur autotrophic denitrification reagents.

[0032] like Figure 1 The figure shows a structural diagram or connection diagram of a sulfur autotrophic denitrification filter device driven by a suspended packed bed, wherein the sulfur autotrophic denitrification filter device comprises a regulating tank 1, a sulfur autotrophic denitrification biological filter 2 and a sedimentation tank 3 which are sequentially connected along the flow direction of the wastewater.

[0033] The regulating tank 1 is provided with a water inlet 11 for inputting wastewater. The regulating tank 1 is used to homogenize the wastewater, that is, to temporarily store the wastewater to prevent sudden changes in water quality from affecting microbial activity.

[0034] Sulfur autotrophic denitrification biofilter 2 mainly undergoes sulfur autotrophic denitrification reaction to remove nitrate nitrogen (NO3 - -N). Specifically, the interior of the sulfur autotrophic denitrification biological filter 2 is provided with a suspended sulfur autotrophic denitrification biological filler 21. The suspended sulfur autotrophic denitrification biological filler 21 is used to provide nutrients for the activated sludge and provide a place for the activated sludge to attach, so that the sulfur autotrophic denitrification reaction occurs to remove nitrate nitrogen (NO3 --N). After the wastewater is treated by the sulfur autotrophic denitrification biological filter 2, the nitrate in the wastewater can be deeply removed.

[0035] The sulfur autotrophic denitrification biological filter 2 is further connected to a sulfur autotrophic denitrification dosing box 4 , and the sulfur autotrophic denitrification dosing box 4 is used to store a mixed reagent containing inorganic alkali and nutrient elements.

[0036] The mixed reagent containing inorganic alkali and nutrient elements can enter the sulfur autotrophic denitrification biological filter 2 through a pipeline. The mixed reagent containing inorganic alkali and nutrient elements can assist the growth of microorganisms.

[0037] The dosage of the inorganic base and the nutrient elements can be determined according to the concentration of nitrate in the influent. The inorganic base and the nutrient elements can be any reagent commonly used in the art, and the present invention does not limit this.

[0038] The sedimentation tank 3 is used to statically settle the treated wastewater to separate mud and water. A water outlet 31 is provided on the top of the sedimentation tank 3, and the water outlet 31 is used to discharge the treated and separated wastewater.

[0039] Specifically, wastewater first enters a regulating tank 1 for homogenization, then enters a sulfur autotrophic denitrification biofilter 2, where suspended sulfur autotrophic denitrification biofiller 21 provides nutrients to the activated sludge, removing nitrates from the wastewater. The wastewater then passes through a sedimentation tank 3 for static sedimentation before being discharged from the sulfur autotrophic denitrification filter.

[0040] The utility model provides a sulfur autotrophic denitrification filter device driven by a suspended filler bed, which can significantly improve the mass transfer efficiency of the sulfur autotrophic denitrification process and achieve NO3 - -N for depth removal.

[0041] Moreover, the sulfur autotrophic denitrification filter device driven by a suspended packing bed has low operating costs and a simple structure. It can efficiently and deeply treat wastewater. The nitrate concentration of the treated effluent can meet the discharge standards or further treatment requirements, and can reach the surface water category IV standard at the highest.

[0042] In addition, compared with a fixed packing bed, the suspended sulfur autotrophic denitrification biological filler 21 in the sulfur autotrophic denitrification filter device driven by a suspended packing bed provided by the present invention can be replaced in time according to consumption, without causing waste and is not easy to clog.

[0043] In some specific embodiments, an electric control cabinet 5 is further included, and the electric control cabinet 5 is used to control the working state of each unit in the sulfur autotrophic denitrification filter device.

[0044] The sulfur autotrophic denitrification filter device driven by the suspended filler bed has a high degree of automation and is conducive to large-scale application.

[0045] It is understandable that, as needed, some or all of the components in the sulfur autotrophic denitrification filter device can be electrically connected to the electric control cabinet 5. The entire sulfur autotrophic denitrification filter device can be controlled by the electric control cabinet 5.

[0046] In some specific embodiments, the bottom of the regulating tank 1 is connected to the top of the sulfur autotrophic denitrification biological filter 2 through a pipeline via a water inlet pump 12 and a water inlet flowmeter 13, so that the regulating tank 1 is connected to the sulfur autotrophic denitrification biological filter 2.

[0047] The water inlet pump 12 and the water inlet flow meter 13 are used to jointly regulate the inlet flow rate of the wastewater entering the sulfur autotrophic denitrification biological filter 2, thereby adjusting the hydraulic retention time.

[0048] In some specific embodiments, the top of the sulfur autotrophic denitrification biological filter 2 is connected to the top of the sedimentation tank 3 through a pipeline.

[0049] In some specific embodiments, a first stirring device 14 is provided in the regulating tank 1 , and the first stirring device 14 is used to stir the wastewater in the regulating tank 1 .

[0050] The first stirring device 14 may be any stirrer commonly used in the art, such as a propeller stirrer, a turbine stirrer, a magnetic stirrer or a screw stirrer, and the present invention does not limit this.

[0051] In some specific embodiments, a plug flow agitator 22 is provided at the bottom of the sulfur autotrophic denitrification biological filter 2 , and the plug flow agitator 22 is used to stir the wastewater in the sulfur autotrophic denitrification biological filter 2 .

[0052] Among them, the plug-flow agitator 22 is a highly efficient agitating device, which is mainly used for mixing and homogenizing liquids. It drives the agitating impeller to rotate through a motor to generate a swirling jet, and uses the shear stress along the jet surface to mix the liquid outside the flow field to generate a stirring effect through friction, thereby forming a volume flow and realizing controlled fluid transportation in a large volume flow pattern.

[0053] In some specific embodiments, the bottom of the sulfur autotrophic denitrification biological filter 2 is connected to the sulfur autotrophic denitrification dosing tank 4 through a pipeline via a dosing pump 23, wherein the dosing pump 23 is used to transport the mixed reagent containing inorganic alkali and nutrient elements into the interior of the sulfur autotrophic denitrification biological filter 2 to promote the sulfur autotrophic denitrification reaction.

[0054] In some specific embodiments, a second stirring device 41 is provided in the sulfur autotrophic denitrification dosing box 4 , and the second stirring device 41 is used to stir the mixed reagent containing the inorganic base and the nutrient elements in the sulfur autotrophic denitrification dosing box 4 .

[0055] Specifically, the sulfur autotrophic denitrification dosing box 4 contains water in addition to the mixed reagent containing inorganic base and nutrient elements. The second stirring device 41 can achieve homogenization of the mixed reagent containing inorganic base and nutrient elements and water.

[0056] The second stirring device 41 may be any stirrer commonly used in the art, such as a propeller stirrer, a turbine stirrer, a magnetic stirrer or a screw stirrer, etc., and the present invention does not limit this.

[0057] In some specific implementations, a sludge return port 32 and a sludge discharge port 34 are provided at the bottom of the sedimentation tank 3 .

[0058] The sludge return port 32 is connected to the bottom of the sulfur autotrophic denitrification biological filter 2 via a pipeline via a sludge return pump 33 . That is, the sludge can be returned to the sulfur autotrophic denitrification biological filter 2 via the sludge return pump 33 .

[0059] The mud outlet 34 is connected to the outside of the sulfur autotrophic denitrification filter device through a pipeline, and the mud outlet 34 is used to discharge mud residue.

[0060] In some specific embodiments, the suspended sulfur autotrophic denitrification biological filler 21 includes a hollow spherical plastic filler and a sulfur autotrophic denitrification reagent disposed inside the hollow spherical plastic filler.

[0061] In some specific embodiments, the sulfur autotrophic denitrification reagent includes granular sulfur (ie, elemental sulfur).

[0062] In some specific embodiments, the filling amount of the suspended sulfur autotrophic denitrification biological filler 21 is 40% to 50% of the effective volume of the sulfur autotrophic denitrification biological filter 2, such as 41%, 43%, 45% or 48%.

[0063] In some specific embodiments, the residence time of the wastewater in the sulfur autotrophic denitrification biological filter 2 is 30 min to 240 min, which can be determined according to the concentration of nitrate in the influent and adjusted by the influent flow rate and the effective volume of the filter.

[0064] In some specific embodiments, the dissolved oxygen (DO) concentration inside the sulfur autotrophic denitrification biological filter 2 is in the range of DO≤0.5 mg / L.

[0065] In some specific embodiments, the wastewater includes but is not limited to urban wastewater.

[0066] Specifically, the method for treating wastewater using the sulfur autotrophic denitrification filter device driven by the above-mentioned suspended filler bed includes the following steps: First, the wastewater enters the regulating tank 1 through the water inlet 11 by an external water inlet method, and the wastewater is homogenized. Subsequently, the wastewater is pumped into the sulfur autotrophic denitrification biological filter 2 through the water inlet pump 12, and at the same time, the mixed reagent containing inorganic alkali and nutrient elements is evenly mixed with an appropriate amount of clean water in the sulfur autotrophic denitrification dosing box 4, and is pumped into the sulfur autotrophic denitrification biological filter 2 through the dosing pump 23. The mixed reagent containing inorganic alkali and nutrient elements is evenly mixed with the wastewater after being stirred by the plug-flow agitator 22. The suspended sulfur autotrophic denitrification biological filler 21 is in full contact with the wastewater and the mixed reagent containing inorganic alkali and nutrient elements. Under the action of the sulfur autotrophic denitrification-related microbial flora, NO3 in the wastewater is removed. - -N is reduced to N2 and released, achieving the degradation of nitrate nitrogen, completing the sulfur autotrophic denitrification reaction, and achieving the reduction of NO3 in wastewater. - -N deep treatment. The treated wastewater then enters the sedimentation tank 3 for static sedimentation before being discharged.

[0067] In a specific embodiment, a certain town wastewater treatment plant processes 100,000 m3 of water per day. 3 / d, and NO3 in the secondary effluent - -N concentration is about 15mg / L, and the sulfur autotrophic denitrification filter device driven by the suspended filler bed provided by the utility model (the sulfur autotrophic denitrification reagent uses granular sulfur) is used to remove the residual NO3 in the secondary effluent. - -N treatment, and take multiple wastewater samples to test water quality indicators before and after treatment. After a period of operation, the effluent NO3 - -N is lower than 1mg / L, NO3 - The average removal rate of -N was 94.2%. The specific water quality indicators are shown in Table 1 below.

[0068] Table 1 Comparison of water quality indicators of urban wastewater collected by wastewater treatment plants before and after treatment

[0069] Wastewater samples Influent (mg / L) Outlet water (mg / L) Removal rate (%) Sample 1 15.4 0.7 95.5 Sample 2 18.2 1.0 94.5 Sample 3 20.3 1.5 92.6

[0070] It can be seen from Table 1 that the sulfur autotrophic denitrification filter device driven by the suspended filler bed provided by the utility model can reduce the residual NO3 in the secondary effluent of urban wastewater. - -N was treated with a removal rate of over 92%.

[0071] In summary, the utility model provides a sulfur autotrophic denitrification filter device driven by a suspended filler bed, which combines the suspended fixed filler with the nutrients of the sulfur autotrophic denitrification process to achieve the purpose of reducing NO3 in the secondary effluent of urban wastewater. - -N deep removal, the device has the advantages of high mass transfer efficiency, high degree of automation, strong operability and not easy to produce secondary pollution.

[0072] Although the present invention has been illustrated and described using specific embodiments, it should be appreciated that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some or all of the technical features therein may be replaced by equivalents, without departing from the spirit and scope of the present invention. However, these modifications or replacements do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention. Therefore, this means that all such replacements and modifications within the scope of the present invention are included in the appended claims.

Claims

1. A sulfur autotrophic denitrification filter device driven by a suspended packed bed, characterized in that: It includes a regulating tank, a sulfur autotrophic denitrification biological filter and a sedimentation tank which are sequentially connected along the flow direction of the wastewater; Wherein, the regulating tank is provided with a water inlet for inputting wastewater, and the regulating tank is used to homogenize the wastewater; A suspended sulfur autotrophic denitrification biological filler is provided inside the sulfur autotrophic denitrification biological filter; the suspended sulfur autotrophic denitrification biological filler is used to provide nutrients for the activated sludge and provide a place for the activated sludge to attach, so that a sulfur autotrophic denitrification reaction occurs to remove nitrate nitrogen in the wastewater; The sulfur autotrophic denitrification biological filter is also connected to a sulfur autotrophic denitrification dosing box, and the sulfur autotrophic denitrification dosing box is used to store a mixed reagent containing inorganic alkali and nutrient elements; The sedimentation tank is used to statically settle the treated wastewater to separate mud and water; a water outlet is provided on the top of the sedimentation tank, and the water outlet is used to discharge the treated wastewater.

2. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to claim 1, characterized in that: It also includes an electric control cabinet, which is used to control the working status of each unit in the sulfur autotrophic denitrification filter device.

3. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to claim 1, characterized in that: The bottom of the regulating tank is connected to the sulfur autotrophic denitrification biological filter through a pipeline via an inlet pump and an inlet flow meter; wherein the inlet pump and the inlet flow meter are used to jointly regulate the inlet flow of the wastewater entering the sulfur autotrophic denitrification biological filter.

4. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to claim 1, characterized in that: A first stirring device is provided in the regulating tank, and the first stirring device is used to stir the wastewater in the regulating tank.

5. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to claim 1, characterized in that: A plug flow agitator is provided at the bottom of the sulfur autotrophic denitrification biological filter, and the plug flow agitator is used to stir the wastewater in the sulfur autotrophic denitrification biological filter.

6. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to claim 1, characterized in that: The bottom of the sulfur autotrophic denitrification biological filter is connected to the sulfur autotrophic denitrification dosing box through a pipeline via a dosing pump. The dosing pump is used to transport the mixed reagent containing inorganic alkali and nutrient elements into the sulfur autotrophic denitrification biological filter.

7. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to claim 1, characterized in that: A second stirring device is provided in the sulfur autotrophic denitrification dosing box, and the second stirring device is used to stir the mixed reagent containing the inorganic base and the nutrient elements in the sulfur autotrophic denitrification dosing box.

8. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to claim 1, characterized in that: The bottom of the sedimentation tank is provided with a sludge return port and a sludge discharge port; wherein the sludge return port is connected to the bottom of the sulfur autotrophic denitrification biological filter tank through a pipeline via a sludge return pump; the sludge discharge port is used to discharge sludge.

9. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to any one of claims 1 to 8, characterized in that: The suspended sulfur autotrophic denitrification biological filler comprises a hollow spherical plastic material filler and a sulfur autotrophic denitrification reagent arranged inside the hollow spherical plastic material filler.

10. The sulfur autotrophic denitrification filter device driven by a suspended packed bed according to claim 9, characterized in that: The sulfur autotrophic denitrification reagent includes granular sulfur.

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