Denitrification optimization test device

Abstract

The utility model relates to a denitrification optimization test device which is characterized in that a water tank is axially divided into an anoxic tank and an oxidation tank by a separation curtain, a bottom plate part is downwards inclined to form a sludge area, a side plate is positioned in the sludge area and is provided with a connecting port communicated with the sludge area of an external vertical flow multi-stage A / O (Anaerobic / Oxic) treatment device, a water inlet is communicated with a water outlet device of the external vertical flow multi-stage A / O treatment device, and a water outlet is communicated with a water outlet device of the external vertical flow multi-stage A / O treatment device. A plurality of aeration main pipes for supplying air are paved on the surface of the water tank, the aeration main pipes are fixedly connected with the upper edge of the partition curtain, the aeration main pipes are positioned in the anoxic tank and the oxidation tank and are respectively provided with an anoxic combined device and an oxidation combined device in a suspending manner, and a sludge discharging device for discharging sludge is also arranged in the water tank; a water outlet device of a vertical flow multi-stage A / O treatment device in the prior art is communicated, treated sewage and sludge are subjected to secondary denitrification through an anoxic tank and an anoxic combined device and an oxidation combined device arranged in an oxidation tank which are axially arranged, and then are discharged and separated through a water outlet and a sludge discharge device, so that the sewage treatment effect is greatly enhanced.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to a denitrification optimization test device. Background Art

[0002] Sewage treatment is divided into two types: organic polluted sewage treatment and inorganic polluted sewage treatment. The main removers of organic polluted sewage treatment are organic pollutants such as BOD5, ammonia nitrogen, total nitrogen, total phosphorus in the water, and sewage often contains these pollutants in excess at the same time. To remove these pollutants, it is necessary to have three processes in the sewage treatment process: anoxic, anaerobic and aerobic, and to circulate the sewage and activated sludge in these three processes. The removal of total nitrogen is mainly the circulation of sewage in the anoxic and aerobic processes, while the removal of total phosphorus is mainly the circulation of microorganisms in the activated sludge in the anaerobic and aerobic processes. The A2O process is currently widely used in municipal sewage treatment plants with larger water volumes, and the effect is also good.

[0003] Publication number: CN110980950A discloses a vertical flow multi-stage A / O sewage treatment device, including a box body, an inlet pipe, an outlet pipe and a mud discharge port. The interior of the box body is divided into at least two reaction zones and a sedimentation zone in sequence by partitions. The reaction zone includes an anoxic zone and an aerobic zone. Each anoxic zone is provided with a water inlet and a valve. In addition, the present invention also discloses a sewage treatment method, (1) providing the above-mentioned vertical flow multi-stage A / O sewage treatment device; (2) introducing sewage into the box through an inlet pipe and entering different reaction zones in turn; (3) adjusting the valves in the anoxic zones of different reaction zones so that the sewage enters different reaction zones in a certain proportion; (4) after the sewage reacts in different reaction zones, the sewage enters the sedimentation zone; (5) discharging clean water through an outlet pipe and discharging sludge through a sludge outlet. The vertical multi-stage A / O sewage treatment device proposed in this document has a vertical flow layout, and each treatment unit is relatively fixed, and has limited ability to adjust hydraulic load changes. When the inlet water quality fluctuates greatly or the pollutant concentration is high, the system may be difficult to adapt. At the same time, since the residence time and reaction conditions of sewage in each reaction zone in the vertical flow multi-stage A / O process are relatively complex to control, the effluent water quality will be unstable, especially the removal effect of nitrogen and phosphorus is easily affected by shock load and environmental factors. Therefore, the sewage treatment device needs to be subsequently equipped with a deoxygenation optimization device to further enhance the sewage treatment effect. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a denitrification optimization test device in view of the deficiencies of the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a denitrification optimization test device, comprising a box body, a water inlet, and a water outlet, the box body comprising side panels and a bottom plate, the side panels are arranged around the bottom plate to form a water pool, the water inlet and the water outlet are both arranged at one end of the side panel, and the characteristic is that: a partition is provided in the middle of the water pool, the partition divides the water pool axially into an anoxic pool and an oxidation pool, the bottom plate portion is tilted downward to form a sludge area, the side panel is located in the sludge area and is provided with a connection port for conducting and connecting to the sludge area of ​​an external vertical flow multi-stage A / O treatment device, the water inlet is communicated with the water outlet device of the external vertical flow multi-stage A / O treatment device, a plurality of aeration main pipes for air supply are laid on the surface of the water pool, the aeration main pipe is fixedly connected to the upper edge of the partition, the aeration main pipe is located in the anoxic pool and the oxidation pool, and an anoxic combination device and an oxidation combination device are suspended therein respectively, and a sludge discharge device for discharging sludge is also provided in the water pool.

[0006] By adopting the above technical scheme, the denitrification optimization test device is added to the vertical multi-stage A / O sewage treatment device in the existing technology. The connection port arranged in the sludge area of ​​the side plate is connected to the sludge area of ​​the vertical multi-stage A / O sewage treatment device, and the water inlet is connected to the water outlet device of the external vertical flow multi-stage A / O treatment device. The treated sewage and sludge are passed through the axially arranged anoxic tank, the anoxic combination device arranged in the oxidation tank, and the oxidation combination device for secondary denitrification, and then discharged and separated from the sludge through the water outlet and the sludge discharge device, which greatly enhances the sewage treatment effect, avoids the problems caused by the vertical multi-stage A / O sewage treatment device in the existing technology, and makes the effluent water quality more stable.

[0007] The above-mentioned denitrification optimization test device can be further configured as follows: the anoxic combination device includes a first grid evenly distributed in the anoxic tank, the first grid is fixedly connected to the aeration main pipe, an installation cavity for installing a mixer is also provided between the first grids, and the first grid is also provided with a first braided biological contact filler.

[0008] With the above technical solution, the first braided biological contact filler provides a huge surface area, allowing more microorganisms to attach and grow on it. This not only increases the total amount of effective microorganisms in the pool, but also promotes the formation of biofilm, thereby accelerating the decomposition of organic matter and the removal of nitrogen. An installation cavity for the mixer is set between the first grids to ensure the correct placement and operation of the mixer. Such a layout optimizes the stirring and circulation of the water flow, improves the mixing degree of the liquid in the reactor, and enables pollutants to contact microorganisms more effectively.

[0009] The above-mentioned denitrification optimization test device can be further configured as follows: the oxidation combination device includes a second grid divided in the oxidation tank, the second grid is fixedly connected to the aeration main pipe, the aeration main pipe extends to the second grid and is provided with a plurality of connecting pipes, the connecting pipes are suspended with aeration pipes, and the second grid is also provided with a second braided biological contact filler.

[0010] By adopting the above technical solution, the compact layout of the second grid maximizes the use of limited space in the oxidation pond, provides sufficient installation positions for the filler and the aeration system, and also maintains the compact structure of the pond body. The aeration pipes suspended on the connecting pipes can evenly distribute the air to various parts of the oxidation pond, ensuring the effective dissolution of oxygen in the water body. This uniform oxygen distribution is essential for the growth of aerobic microorganisms and the oxidative decomposition of organic matter. The second braided biological contact filler greatly increases the attachment and growth of aerobic microorganisms.

[0011] The above-mentioned denitrification optimization test device can be further configured as follows: the sludge discharge device includes a plurality of sludge discharge pipes fixedly arranged on the side wall, the sludge discharge pipes are evenly distributed in the anoxic tank and the oxidation tank, the height of the sludge area is lower than the height of the bottom plate, the side plate is provided with a through hole for the sludge discharge pipe to pass through, and the sludge discharge pipe extends to the sludge area.

[0012] By adopting the above technical scheme, the uniform distribution of the sludge discharge pipes in the anoxic tank and the oxidation tank ensures that the sludge can be effectively collected in the entire tank body. Timely and effective sludge discharge reduces the accumulation of sludge in the tank body, avoids anaerobic conditions and odor problems that may be caused by excessive sludge thickness, and maintains the stability of the treatment environment. Proper sludge discharge helps to maintain the balance of microorganisms in the tank and ensure the healthy growth of aerobic and anoxic microbial communities, which is crucial for a stable biological treatment process. Since the height of the sludge area is lower than the height of the bottom plate, a flow trough for water supply and circulation is formed between the sludge areas, which provides a smooth channel for water flow, helps to maintain the stability and uniformity of the water flow, and reduces dead corners and short-flow phenomena.

[0013] The above-mentioned denitrification optimization test device can be further configured as follows: the partition curtain is a PVC canvas, and the bottom and side edges of the partition curtain are fixedly connected to the water pool through reinforced concrete.

[0014] By adopting the above technical solution, the design of the partition ensures the effective isolation between the oxidation tank and the anoxic tank, avoids the mutual mixing of sewage between the two treatment stages, and ensures the treatment efficiency of each stage. The partition is PVC canvas with good chemical corrosion resistance and can resist various chemical substances that may be encountered in the sewage treatment process, such as hydrogen sulfide, acid and alkali, thereby extending the service life of the partition.

[0015] The beneficial effects of the utility model are as follows: the water outlet device of the vertical flow multi-stage A / O treatment device in the prior art is connected, the treated sewage and sludge are passed through the axially arranged anoxic tank, the anoxic combination device arranged in the oxidation tank, and the oxidation combination device for secondary denitrification, and then discharged and separated through the water outlet and the sludge discharge device, which greatly enhances the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a top view of the structure of the utility model;

[0018] Figure 3 This is a structural diagram of the hypoxia combined device of the utility model;

[0019] Figure 4 This is a structural diagram of the oxidation assembly device of the utility model;

[0020] Figure 5 It is a side view of the utility model;

[0021] Label notes: Label notes: 1-box, 2-water inlet, 3-water outlet, 4-partition, 5-sludge area, 6-connecting port, 7-aeration main pipe, 8-water tank, 9-first grille, 10-installation cavity, 11-mixer, 12-first braided biological contact filler, 13-penetration hole, 14-second grille, 15-connecting pipe, 16-aeration pipe, 17-second braided biological contact filler, 18-sludge discharge pipe, 101-side panel, 102-bottom plate, 801-anoxic tank, 802-oxidation tank. DETAILED DESCRIPTION

[0022] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0023] The specific method of the utility model is to divide the water pool 8 into an anoxic pool 801 and a contact oxidation pool 802 by using a partition 4. The partition 4 in the pool is made of PVC canvas. The bottom edge of the partition 4 is connected and fixed to the strip reinforced concrete foundation. The surface of the water is protected by a HDPE film to prevent ultraviolet radiation and protect the PVC canvas. An aeration main pipe 7 is arranged on the water surface to supply air to the denitrification optimization experimental device. The aeration main pipe 7 is used for the immobilization of the anoxic combination device and the oxidation combination device. The anoxic combination device and the oxidation combination device both have a first braided biological contact filler 12 and a second braided biological contact filler 17, and microorganisms attach and grow on the braided biological contact filler.

[0024] The anoxic tank 801 is arranged after the original vertical multi-stage AO system and is a post-denitrification area. A water inlet 2 is arranged above the side plate 101. The water from the original vertical multi-stage AO system passes through the anoxic tank 801 through the upper water inlet 2. The anoxic tank 801 water inlet 2, the oxidation tank 802 is arranged after the anoxic tank 801. Since the height of the sludge area 5 is lower than the height of the bottom plate 102, the curtain 4 forms a flow channel for water supply and circulation between the sludge area 5. The water from the anoxic tank 801 enters the oxidation tank 802 through the flow channel. An aeration pipe 16 is installed in the oxidation tank 802. The aeration pipe 16 can evenly distribute air to various parts of the oxidation tank 802, ensuring the effective dissolution of oxygen in the water body. This uniform oxygen distribution is essential for the growth of aerobic microorganisms and the oxidative decomposition of organic matter. This denitrification optimization test device conducts secondary denitrification on the treated sewage and sludge through the axially arranged anoxic tank 801, the anoxic combination device and the oxidation combination device arranged in the oxidation tank 802, and then removes and separates the treated sewage and sludge from the sludge discharge device through the water outlet 3, thereby greatly enhancing the sewage treatment effect.

[0025] like Figure 1-4The utility model shown in the figure provides the following technical solutions, a denitrification optimization test device, a partition 4 is provided in the middle of the water pool 8, the partition 4 divides the water pool 8 axially into an anoxic pool 801 and an oxidation pool 802, a bottom plate 102 is partially tilted downward to form a sludge area 5, a side plate 101 is located in the sludge area 5 and is provided with a connection port 6 connected to the sludge area 5 of an external vertical flow multi-stage A / O treatment device, a water inlet 2 is communicated with a water outlet device of the external vertical flow multi-stage A / O treatment device, a plurality of aeration pipes 7 for air supply are laid on the surface of the water pool 8, the aeration pipe 7 is fixedly connected to the upper edge of the partition 4, the aeration pipe 7 is located in the anoxic pool 801 and the oxidation pool 802, and an anoxic combination device and an oxidation combination device are suspended therein, a sludge discharge device for sludge discharge is also provided in the water pool 8, by adding the denitrification optimization test device to the vertical multi-stage A / O sewage treatment device in the prior art, the side plate 101 is located in the sludge area 5 and is provided with a connection port 6 connected to the vertical multi-stage A / O treatment device, The sludge area 5 of the multi-stage A / O sewage treatment device is connected, and the water inlet 2 is connected to the water outlet device of the external vertical flow multi-stage A / O treatment device. The treated sewage and sludge are passed through the axially arranged anoxic tank 801, the anoxic combination device arranged in the oxidation tank 802, and the oxidation combination device for secondary denitrification, and then discharged and separated from the sludge discharge device through the water outlet 3, which greatly enhances the sewage treatment effect, avoids the problems caused by the vertical multi-stage A / O sewage treatment device in the prior art, and makes the effluent water quality more stable. The anoxic combination device includes a first grid 9 evenly distributed in the anoxic tank 801, the first grid 9 is fixedly connected to the aeration main pipe 7, and an installation cavity 10 for installing a mixer 11 is also provided between the first grids 9. The first grid 9 is also provided with a first braided biological contact filler 12, and the first braided biological contact filler 12 provides a huge surface area, so that more microorganisms can attach and grow thereon.This not only increases the total amount of effective microorganisms in the pool, but also promotes the formation of biofilm, thereby accelerating the decomposition of organic matter and the removal of nitrogen. An installation cavity 10 for installing the mixer 11 is set between the first grids 9 to ensure the correct placement and operation of the mixer 11. Such a layout optimizes the stirring and circulation of the water flow, improves the mixing degree of the liquid in the reactor, and makes the pollutants and microorganisms contact more effectively. The oxidation combination device includes a second grid 14 distributed in the oxidation pool 802, the second grid 14 is fixedly connected to the aeration main pipe 7, and the aeration main pipe 7 extends to the second grid 14 and is provided with a plurality of connecting pipes 15. The connecting pipes 15 are suspended An aeration pipe 16 is provided, and the second grid 14 is also provided with a second braided biological contact filler 17. The compact layout of the second grid 14 maximizes the use of limited space in the oxidation pond 802, provides sufficient installation positions for the filler and the aeration system, and also maintains the compact structure of the pond body. The aeration pipe 16 suspended on the connecting pipe 15 can evenly distribute air to various parts of the oxidation pond 802, ensuring the effective dissolution of oxygen in the water body. This uniform oxygen distribution is essential for the growth of aerobic microorganisms and the oxidative decomposition of organic matter. The second braided biological contact filler 17 greatly increases the attachment and growth of aerobic microorganisms.

[0026] like Figure 2-5 The utility model provides the following technical solutions: a denitrification optimization test device, a sludge discharge device including a plurality of sludge discharge pipes 18 fixedly arranged on the side wall, the sludge discharge pipes 18 are evenly distributed in the anoxic tank 801 and the oxidation tank 802, the height of the sludge area 5 is lower than the height of the bottom plate 102, the side plate 101 is provided with a through hole 13 for the sludge discharge pipe 18 to pass through, the sludge discharge pipe 18 extends to the sludge area 5, the uniform distribution of the sludge discharge pipe 18 in the anoxic tank 801 and the oxidation tank 802 ensures that the sludge can be effectively collected in the entire tank body, and the sludge can be discharged in a timely and effective manner. The discharge reduces the accumulation of sludge in the pool, avoids the anaerobic conditions and odor problems that may be caused by excessive sludge thickness, and maintains the stability of the treatment environment. Appropriate sludge discharge helps to maintain the balance of microorganisms in the pool and ensures the healthy growth of aerobic and anoxic microbial communities, which is crucial for a stable biological treatment process. Since the height of the sludge area 5 is lower than the height of the bottom plate 102, the curtain 4 forms a flow channel for water supply and circulation between the sludge area 5, which provides a smooth channel for water flow, helps to maintain the stability and uniformity of the water flow, and reduces dead corners and short-flow phenomena. The curtain 4 is PVC canvas, and the bottom and side of the curtain 4 are fixedly connected to the pool 8 through reinforced concrete. The design of the curtain 4 ensures the effective isolation between the oxidation tank 802 and the anoxic tank 801, avoids the mutual mixing of sewage between the two treatment stages, and ensures the treatment efficiency of each stage. The curtain 4 is PVC canvas with good chemical corrosion resistance and can resist various chemical substances that may be encountered in the sewage treatment process, such as hydrogen sulfide, acid and alkali, thereby extending the service life of the curtain 4.

[0027] The beneficial effects of the utility model are as follows: the water outlet device of the vertical flow multi-stage A / O treatment device in the prior art is connected, and the treated sewage and sludge are passed through the axially arranged anoxic tank 801, the anoxic combination device and the oxidation combination device arranged in the oxidation tank 802 for secondary denitrification, and then discharged and separated from the sludge discharge device through the water outlet 3, which greatly enhances the sewage treatment effect.

Claims

1. A denitrification optimization test device, comprising a box, a water inlet, and a water outlet, wherein the box comprises a side plate and a bottom plate, wherein the side plate is arranged around the bottom plate to form a water pool, and the water inlet and the water outlet are both arranged at one end of the side plate, characterized in that: A partition is provided in the middle of the water pool, and the partition divides the water pool axially into an anoxic pool and an oxidation pool. The bottom plate is tilted downward to form a sludge area. The side plate is located in the sludge area and is provided with a connection port that is connected to the sludge area of ​​an external vertical flow multi-stage A / O treatment device. The water inlet is connected to the water outlet device of the external vertical flow multi-stage A / O treatment device. A plurality of aeration main pipes for air supply are laid on the surface of the water pool, and the aeration main pipes are fixedly connected to the upper edge of the partition. The aeration main pipes are located in the anoxic pool and the oxidation pool, and an anoxic combination device and an oxidation combination device are suspended therein respectively. A sludge discharge device for discharging sludge is also provided in the water pool.

2. A denitrification optimization test device according to claim 1, characterized in that: The anoxic assembly device comprises first grids evenly distributed in the anoxic pool, the first grids are fixedly connected to the aeration main pipe, an installation cavity for installing a mixer is provided between the first grids, and the first grids are also provided with a first braided biological contact filler.

3. A denitrification optimization test device according to claim 2, characterized in that: The oxidation combination device includes a second grid divided into an oxidation pond, the second grid is fixedly connected to an aeration main pipe, the aeration main pipe extends into the second grid and is provided with a plurality of connecting pipes, the connecting pipes are suspended with aeration pipes, and the second grid is also provided with a second braided biological contact filler.

4. A denitrification optimization test device according to claim 3, characterized in that: The sludge discharge device includes a plurality of sludge discharge pipes fixedly arranged on the side wall, the sludge discharge pipes are evenly distributed in the anoxic tank and the oxidation tank, the height of the sludge area is lower than the height of the bottom plate, the side plate is provided with a through hole for the sludge discharge pipes to pass through, and the sludge discharge pipes extend to the sludge area.

5. A denitrification optimization test device according to any one of claims 1 to 4, characterized in that: The partition is a PVC canvas, and the bottom and side of the partition are fixedly connected to the pool through reinforced concrete.

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