Wastewater denitrification system for coupling photocatalysis short-cut nitrification with anaerobic ammonia oxidation

Abstract

The utility model discloses a photocatalytic short-cut nitrification coupled anaerobic ammonia oxidation wastewater denitrification system which comprises a vertical shell, a filter chamber, a photocatalytic chamber, a precipitation chamber, an anaerobic ammonia oxidation chamber and a short-cut nitrification chamber are sequentially arranged in the vertical shell from top to bottom, and inlets and outlets are formed in the left side and the right side of each chamber. The adjacent chambers are communicated through a pipeline outside the vertical shell; a filler layer is mounted in the photocatalytic chamber, a water distribution device A is arranged below the filler layer, and the water distribution device A is connected with an outlet of the filtering chamber through a pipeline; a plurality of light sources are mounted above the filler layer, a glass cover covers the light sources, and a plurality of glass sheets are further mounted above the filler layer. The vertical flow type structure is adopted, firstly, substances difficult to treat are decomposed into substances easy to treat through photocatalysis, then nitrogen and phosphorus are removed through anaerobic ammonia oxidation and short-cut nitrification in a combined mode, high-nitrogen wastewater difficult to treat is treated together, and the overall treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to a wastewater denitrification system for photocatalytic short - range nitrification coupled with anaerobic ammonium oxidation, belonging to the technical field of wastewater treatment. Background Technique

[0002] For the treatment methods of high - nitrogen wastewater, there are physical methods, chemical methods, and biological methods. Among them, in physical methods, membrane treatment methods such as electrodialysis and reverse osmosis not only have high costs but also easily form salt pollution on the membrane cloth, and the treatment effect is not ideal; chemical methods such as breakpoint chlorination, ion exchange method, and chemical precipitation method not only have high costs but also easily form chlorides and a large amount of precipitates, and the subsequent treatment is difficult.

[0003] At present, in biological methods, some people use anaerobic ammonium oxidation coupled with sulfur autotrophic denitrification to treat high - nitrogen wastewater, which has a good treatment effect on high - nitrogen wastewater, is relatively environmentally friendly, has low costs, and does not require external drugs. However, this method has an unsatisfactory treatment effect on refractory wastewater containing benzene rings. Pharmaceutical wastewater contains a large amount of refractory high - nitrogen wastewater, and this method cannot completely treat it.

[0004] In summary, it is obvious that the existing technology has inconveniences and defects in actual use, so it is necessary to be improved. Content of the Utility Model

[0005] Aiming at the deficiencies in the background technique, the utility model provides a wastewater denitrification system for photocatalytic short - range nitrification coupled with anaerobic ammonium oxidation, which adopts a vertical - flow structure. First, the refractory substances are decomposed into relatively easy - to - treat substances through photocatalysis, and then nitrogen and phosphorus are removed through the combined denitrification of anaerobic ammonium oxidation and short - range nitrification reactions to jointly treat refractory high - nitrogen wastewater and improve the overall treatment effect.

[0006] To solve the above - mentioned technical problems, the utility model adopts the following technical solutions:

[0007] A wastewater denitrification system for photocatalytic short - range nitrification coupled with anaerobic ammonium oxidation, including a vertical shell. Inside the vertical shell, a filtering chamber, a photocatalytic chamber, a precipitation chamber, an anaerobic ammonium oxidation chamber, and a short - range nitrification chamber are sequentially arranged from top to bottom. Inlets and outlets are provided on the left and right sides of each chamber, and adjacent chambers are connected through pipelines outside the vertical shell;

[0008] A packing layer is installed in the photocatalytic chamber. Below the packing layer, a water distribution device A is provided, and the water distribution device A is connected to the outlet of the filtering chamber through a pipeline; Above the packing layer, a plurality of light sources are installed, the light sources are covered with glass covers, and a plurality of glass sheets are also installed above the packing layer.

[0009] Furthermore, an inclined grille is installed inside the filtering chamber, activated carbon is filled between the grilles, and a wastewater inlet is provided on one side of the top of the filtering chamber.

[0010] Furthermore, the packing layer is composed of titanium-loaded granular packing.

[0011] Furthermore, the multiple glass sheets are cross-mounted on the mounting rod. The glass sheets are in the shape of flat rectangular blocks, and loads are provided on the glass sheets.

[0012] Furthermore, a manhole is provided on the side of the photocatalytic chamber.

[0013] Furthermore, a sewage collection hopper is provided at the bottom of the precipitation chamber. A sludge discharge pipe is connected to the bottom of the sewage collection hopper, and the sludge discharge pipe penetrates through the outer wall of the vertical shell.

[0014] Furthermore, an aeration assembly is installed at the bottom of the anaerobic ammonium oxidation chamber.

[0015] Furthermore, a MABR membrane-aerated bioreactor is installed in the shortcut nitrification chamber. A water distribution device B is installed at the bottom of the MABR membrane-aerated bioreactor, and the water distribution device B is connected to the outlet on the side of the anaerobic ammonium oxidation chamber through a pipeline.

[0016] Furthermore, a clear water outlet is provided on one side of the top of the shortcut nitrification chamber, and the clear water outlet is also connected to the inlet on the side of the anaerobic ammonium oxidation chamber through a reflux pipe.

[0017] After the present utility model adopts the above technical solutions, compared with the prior art, it has the following advantages:

[0018] By means of photocatalysis, the refractory pollutants in the wastewater are converted into small-molecule pollutants, and then through the combined action of the glass sheets and the titanium-loaded granular packing, the COD content of the wastewater is reduced; through the combined reaction of shortcut nitrification and anaerobic ammonium oxidation, nitrogen removal is more thorough. Through the combined action of the two reactions, the treatment capacity is improved, the treatment cycle is shortened, no external carbon source is required, and the overall treatment effect is improved; shortcut nitrification and anaerobic ammonium oxidation can react cyclically to jointly treat the difficult-to-treat high-nitrogen wastewater;

[0019] The overall vertical flow structure is adopted, which has the advantage of saving floor space.

[0020] The present utility model will be described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is a schematic internal structural diagram of the present utility model;

[0023] Figure 3 is a schematic diagram of the upper structure of the present utility model;

[0024] Figure 4 It is a schematic diagram of the lower structure of the present utility model.

[0025] In the figure, 1 - vertical shell; 2 - filtration chamber, 21 - grille; 3 - photocatalytic chamber, 31 - packing layer, 32 - water distribution device A, 33 - light source, 34 - glass sheet, 35 - mounting rod, 36 - manhole; 4 - sedimentation chamber, 41 - sewage collection hopper, 42 - sludge discharge pipe; 5 - anammox chamber, 51 - aeration assembly; 6 - shortcut nitrification chamber, 61 - MABR membrane bio-reactor, 62 - water distribution device B; 7 - wastewater inlet; 8 - clear water outlet; 9 - reflux pipe. Specific embodiments

[0026] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described with reference to the accompanying drawings.

[0027] As Figures 1-4 Collectively shown, the present utility model provides a wastewater denitrification system coupling photocatalysis and shortcut nitrification with anammox, which includes a vertical shell 1. Inside the vertical shell 1, a filtration chamber 2, a photocatalytic chamber 3, a sedimentation chamber 4, an anammox chamber 5, and a shortcut nitrification chamber 6 are sequentially arranged from top to bottom. Inlets and outlets are provided on the left and right sides of each chamber, and adjacent chambers are connected through pipelines outside the vertical shell 1.

[0028] An inclined grille 21 is installed inside the filtration chamber 2, and activated carbon is filled between the grilles 21. A wastewater inlet 7 is provided on one side of the top of the filtration chamber 2.

[0029] A packing layer 31 is installed inside the photocatalytic chamber 3. The packing layer 31 is composed of titanium-loaded granular packing. Below the packing layer 31, a water distribution device A 32 is provided, and the water distribution device A 32 is connected to the outlet of the filtration chamber 2 through a pipeline.

[0030] A plurality of light sources 33 are installed above the packing layer 31. The light sources 33 are covered with glass covers, which not only protect the light sources 33 from being damaged but also facilitate cleaning. The light sources 33 are installed crosswise to ensure that the entire photocatalytic chamber 3 can be illuminated.

[0031] A plurality of glass sheets 34 are also installed above the packing layer 31. The plurality of glass sheets 34 are installed crosswise on the mounting rod 35. The shape of the glass sheet 34 is a flat rectangle, which can reflect light, improve the utilization rate of light, and a load is provided on the glass sheet 34. The copper-manganese compound is loaded onto the glass sheet 34 by ultrasonic waves.

[0032] Through the oxidation of light and the dual catalytic effects of the titanium-loaded packing and the glass sheet, the photocatalytic effect is improved, and the difficult-to-treat substances are decomposed into relatively easy-to-treat substances.

[0033] A manhole 36 is provided on the side of the photocatalytic chamber 3 to facilitate the maintenance or replacement of the internal components of the chamber.

[0034] A sewage collection hopper 41 is provided at the bottom of the precipitation chamber 4. A sludge discharge pipe 42 is connected to the bottom of the sewage collection hopper 41. The sludge discharge pipe 42 penetrates through the outer wall of the vertical shell 1, and the sludge discharge pipe 42 can regularly discharge the precipitation for sludge treatment.

[0035] An aeration assembly 51 is installed at the bottom of the anammox chamber 5.

[0036] A MABR membrane aerated bioreactor 61 is installed in the shortcut nitrification chamber 6. A water distribution device B62 is installed at the bottom of the MABR membrane aerated bioreactor 61. The water distribution device B62 is connected to the outlet on the side of the anammox chamber 5 through a pipeline.

[0037] One side of the top of the shortcut nitrification chamber 6 is provided with a clear water outlet 8. The clear water outlet 8 is also connected to the inlet on the side of the anammox chamber 5 through a reflux pipe 9, and the effluent from the shortcut nitrification can enter the anammox for continuous reaction.

[0038] The specific working principle of the present utility model:

[0039] The wastewater enters the filtration chamber 2 from the wastewater inlet 7, passes through the grille 21 and activated carbon filtration to filter out large particle pollutants and reduce the chromaticity of the wastewater; then it enters the photocatalytic chamber 3, and through photocatalysis, the refractory pollutants are converted into small molecule pollutants, and then through the combined action of the glass sheet 34 and the titanium-loaded granular filler, the COD content of the wastewater is reduced; after the photocatalytic reaction, it enters the precipitation chamber 4, the pH is adjusted to neutral, and then PAC and PAM flocculants are added for flocculation. The bottom sediment is regularly discharged through the sludge discharge pipe 42, and the supernatant then enters the anammox chamber 5 and the shortcut nitrification chamber 6 in sequence; the combined shortcut nitrification-anammox reaction will make the denitrification more complete. Through the combined action of the two reactions, the treatment capacity is increased, the treatment cycle is shortened, no external carbon source is required, and the effect of 1+1>2 is achieved, improving the overall treatment effect; the shortcut nitrification and anammox can react cyclically to jointly treat the difficult-to-treat high-nitrogen wastewater; finally, the clear water is discharged from the clear water outlet 8.

[0040] The above is an example of the best implementation mode of the present utility model. The parts not described in detail are all common general knowledge of those skilled in the art. The protection scope of the present utility model is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present utility model is also within the protection scope of the present utility model.

Claims

1. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation, characterized in that: It comprises a vertical shell (1), wherein a filtration chamber (2), a photocatalytic chamber (3), a precipitation chamber (4), an anaerobic ammonia oxidation chamber (5) and a short-range nitrification chamber (6) are arranged in sequence from top to bottom inside the vertical shell (1), and an inlet and outlet are arranged on the left and right sides of each chamber, and adjacent chambers are connected by pipelines outside the vertical shell (1); A packing layer (31) is installed in the photocatalytic chamber (3); a water distribution device A (32) is provided below the packing layer (31); the water distribution device A (32) is connected to the outlet of the filter chamber (2) via a pipeline; a plurality of light sources (33) are installed above the packing layer (31); the light sources (33) are covered with a glass cover; and a plurality of glass sheets (34) are also installed above the packing layer (31).

2. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation as claimed in claim 1, characterized in that: An inclined grille (21) is installed inside the filter chamber (2), and activated carbon is filled between the grilles (21). A wastewater inlet (7) is provided on one side of the top of the filter chamber (2).

3. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation as claimed in claim 1, characterized in that: The filler layer (31) is composed of titanium-loaded particle fillers.

4. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation as claimed in claim 1, characterized in that: The plurality of glass sheets (34) are cross-mounted on the mounting rod (35); the glass sheets (34) are in the form of flat rectangular blocks, and a load is provided on the glass sheets (34).

5. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation as claimed in claim 1, characterized in that: A manhole (36) is provided on the side of the photocatalytic chamber (3).

6. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation as claimed in claim 1, characterized in that: A dirt collecting hopper (41) is provided at the bottom of the sedimentation chamber (4), and a mud discharge pipe (42) is connected to the bottom of the dirt collecting hopper (41), and the mud discharge pipe (42) is arranged to penetrate the outer wall of the vertical shell (1).

7. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation as claimed in claim 1, characterized in that: An aeration assembly (51) is installed at the bottom of the anaerobic ammonium oxidation chamber (5).

8. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation as claimed in claim 1, characterized in that: A MABR membrane aeration bioreactor (61) is installed in the short-range nitrification chamber (6). A water distribution device B (62) is installed at the bottom of the MABR membrane aeration bioreactor (61). The water distribution device B (62) is connected to the outlet on the side of the anaerobic ammonium oxidation chamber (5) through a pipeline.

9. A wastewater denitrification system of photocatalytic short-range nitrification coupled with anaerobic ammonium oxidation as claimed in claim 8, characterized in that: A clean water outlet (8) is provided on one side of the top of the short-range nitrification chamber (6), and the clean water outlet (8) is also connected to an inlet on the side of the anaerobic ammonium oxidation chamber (5) via a reflux pipe (9).

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