Biological fermentation wastewater denitrification equipment by anaerobic ammonia oxidation

Abstract

The utility model discloses a kind of biological fermentation wastewater anaerobic ammonia oxidation denitrification equipment, it is related to wastewater treatment technical field, including first-stage anaerobic ammonia oxidation pool, built-in granular sludge filler, the granular sludge filler includes nitrification filler and anaerobic ammonia oxidation filler;First-stage water distribution pipe;Aeration device;Second-stage anaerobic ammonia oxidation pool, built-in biological membrane component, the biological membrane component has adherent growth biological membrane;Second-stage water distribution pipe;Agitator;Biological fermentation wastewater first enters first-stage anaerobic ammonia oxidation pool, by granular sludge filler simultaneously complete nitrosation and anaerobic ammonia oxidation process, most ammonia nitrogen in wastewater is removed, effluent only contains a small amount of ammonia nitrogen and nitrite nitrogen, then effluent enters second-stage anaerobic ammonia oxidation pool again, by biological membrane component carries out anaerobic ammonia oxidation reaction to further reduce ammonia nitrogen and nitrite nitrogen therein, realize the further promotion of discharge standard.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an anaerobic ammonia oxidation denitrification device for biological fermentation wastewater. Background Technology

[0002] Biological fermentation wastewater includes yeast fermentation liquid, bacterial residue wastewater, and filtration wastewater. The main pollutants are bacterial residue, solvent, fermentation residue, and purification wastewater. It is characterized by high organic matter and suspended solids content, high ammonia nitrogen and total nitrogen concentration, and deep color. Currently, most bioreactoring enterprises use anaerobic ammonium oxidation (ANAO) for treatment. The practical application methods are mainly divided into two categories: one is to add a pre-nitrification unit upstream of the ANAO process to pre-convert some of the ammonia nitrogen in the wastewater into nitrite nitrogen before it enters the ANAO unit for denitrification. However, high-ammonia-nitrogen bio-fermentation wastewater will produce high concentrations of nitrite nitrogen in the pre-nitrification unit, which is difficult to control and can easily inhibit the activity of anaerobic ammonium oxidizing bacteria, affecting the treatment effect. The other category integrates the pre-nitrification and ANAO processes into the same reaction unit. By controlling the operating parameters of the reaction unit, nitrifying bacteria and anaerobic ammonium oxidizing bacteria can complete the denitrification process of the wastewater in the same reaction unit. However, because a stable nitrification process is required, the effluent often contains a certain amount of ammonia nitrogen, making it impossible to further improve the effluent quality requirements.

[0003] For the reasons mentioned above, the current use of traditional nitrification-denitrification processes for denitrification of biological fermentation wastewater often results in problems such as large land area requirements, high aeration energy consumption, large amounts of organic carbon source addition, and high sludge production. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an anaerobic ammonia oxidation denitrification device for biological fermentation wastewater.

[0005] The anaerobic ammonia oxidation denitrification device for biological fermentation wastewater according to an embodiment of this utility model includes: a first-stage anaerobic ammonia oxidation tank, which contains granular sludge packing material, the granular sludge packing material including nitrifying packing material and anaerobic ammonia oxidation packing material, nitrifying bacteria attached to the nitrifying packing material, and anaerobic ammonia oxidation bacteria attached to the anaerobic ammonia oxidation packing material, and an overflow outlet provided on the upper side of the first-stage anaerobic ammonia oxidation tank; and a first-stage water distribution pipe located inside the first-stage anaerobic ammonia oxidation tank, the first-stage water distribution pipe including a first-stage main water inlet pipe and a first-stage branch water distribution pipe, the first-stage main water inlet pipe being connected to the first-stage branch water distribution pipe, and water distribution holes provided on the first-stage branch water distribution pipe; An aeration device is located in the first-stage anaerobic ammonia oxidation tank. The aeration device includes a main air inlet pipe and a branch air pipe. The main air inlet pipe is connected to the branch air pipe, and an aerator is installed on the branch air pipe. A second-stage anaerobic ammonia oxidation tank is built into which a biofilm module is installed, and a biofilm is attached and grown on the biofilm module. A second-stage water distribution pipe is located in the second-stage anaerobic ammonia oxidation tank. The second-stage water distribution pipe includes a second-stage main water inlet pipe and a second-stage branch water distribution pipe. The second-stage main water inlet pipe is connected to the overflow outlet and the second-stage branch water distribution pipe, and a water distribution hole is provided on the second-stage branch water distribution pipe. A stirrer is located in the second-stage anaerobic ammonia oxidation tank.

[0006] According to some embodiments of the present invention, the aerator is located below the first-stage tributary water distribution pipe.

[0007] According to some embodiments of this utility model, the first-level branch water distribution pipe, the branch air pipe, and the second-level branch water distribution pipe are horizontal ring-shaped structures.

[0008] According to some embodiments of the present invention, the overflow outlet is provided with a water outlet screen plate, and the water outlet screen plate has screen holes.

[0009] According to some embodiments of the present invention, the biofilm assembly uses K3 type packing material.

[0010] According to some embodiments of this utility model, the biofilm assembly adopts MBBR or MABR.

[0011] According to some embodiments of the present invention, the aerator is a diaphragm aerator.

[0012] According to some embodiments of the present invention, the stirrer is located at the junction between the inner side wall and the inner bottom wall of the second-stage anaerobic ammonia oxidation tank.

[0013] According to some embodiments of this utility model, the agitator is a submersible agitator.

[0014] According to some embodiments of the present invention, a plurality of layered nets are provided in the second-stage anaerobic ammonia oxidation tank, the layered nets being distributed from top to bottom to divide the second-stage anaerobic ammonia oxidation tank into several layers, and the biofilm assembly is placed on the layered nets.

[0015] The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to the embodiments of this utility model has at least the following technical effects: biological fermentation wastewater first enters the first-stage anaerobic ammonia oxidation tank, where nitrification and anaerobic ammonia oxidation are completed simultaneously through granular sludge packing. Most of the ammonia nitrogen in the wastewater is removed, and the effluent contains only a small amount of ammonia nitrogen and nitrite nitrogen. Then, the effluent enters the second-stage anaerobic ammonia oxidation tank, where anaerobic ammonia oxidation is carried out through biofilm components to further reduce the ammonia nitrogen and nitrite nitrogen, thereby achieving a further improvement in emission standards.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description Additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram illustrating the working principle of this utility model.

[0017] Figure label: The first-stage anaerobic ammonia oxidation tank 100, overflow outlet 110, effluent screen plate 111, granular sludge packing material 120; first-stage water distribution pipe 200, first-stage main inlet pipe 210, first-stage branch water distribution pipe 220; aeration device 300, main air inlet pipe 310, branch air pipe 320, aerator 330; the second-stage anaerobic ammonia oxidation tank 400, inner side wall 401, inner bottom wall 402, biofilm module 410, layer mesh 420; second-stage water distribution pipe 500, second-stage main inlet pipe 510, second-stage branch water distribution pipe 520; agitator 600. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," "exceeding," etc., are understood to exclude the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] The following is for reference. Figure 1 and Figure 2 This invention describes an anaerobic ammonia oxidation denitrification device for biological fermentation wastewater according to an embodiment of the present invention.

[0023] like Figure 1 and Figure 2 As shown, the anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to an embodiment of the present invention includes a first-stage anaerobic ammonia oxidation tank 100, a first-stage water distribution pipe 200, an aeration device 300, a second-stage anaerobic ammonia oxidation tank 400, a second-stage water distribution pipe 500, and a stirrer 600.

[0024] The first-stage anaerobic ammonia oxidation tank 100 contains granular sludge packing material 120, which includes nitrifying packing material and anaerobic ammonia oxidation packing material. Nitrifying bacteria are attached to the nitrifying packing material, and anaerobic ammonia oxidation bacteria are attached to the anaerobic ammonia oxidation packing material. An overflow outlet 110 is provided on the upper side of the first-stage anaerobic ammonia oxidation tank 100. A first-stage water distribution pipe 200 is located inside the first-stage anaerobic ammonia oxidation tank 100. The first-stage water distribution pipe 200 includes a first-stage main inlet pipe 210 and a first-stage branch water distribution pipe 220, which are connected. The first-stage branch water distribution pipe 220 is provided with water distribution holes. An aeration device 300 is located inside the first-stage anaerobic ammonia oxidation tank 100 for aeration. The device 300 includes a main air inlet pipe 310 and a branch air pipe 320, which are connected. An aerator 330 is installed on the branch air pipe 320. The second-stage anaerobic ammonia oxidation tank 400 contains a biofilm module 410, on which a biofilm is attached and grown. The second-stage water distribution pipe 500 is located inside the second-stage anaerobic ammonia oxidation tank 400. The second-stage water distribution pipe 500 includes a second-stage main water inlet pipe 510 and a second-stage branch water distribution pipe 520. The second-stage main water inlet pipe 510 is connected to the overflow outlet 110 and the second-stage branch water distribution pipe 520. The second-stage branch water distribution pipe 520 is provided with water distribution holes. The stirrer 600 is located inside the second-stage anaerobic ammonia oxidation tank 400.

[0025] For example, such as Figure 1 and Figure 2 As shown, the first-stage anammox tank 100 contains granular sludge packing material 120. The granular sludge packing material 120 includes nitrification packing material and anammox packing material. Nitrification bacteria are attached to the nitrification packing material, and anammox bacteria are attached to the anammox packing material. The granular sludge packing material 120 of the first-stage anammox tank 100 is a granular sludge anammox unit. An overflow outlet 110 is provided on the upper side of the first-stage anammox tank 100 for discharging wastewater from the first-stage anammox tank 100. A first-stage water distribution pipe 200 is located inside the first-stage anammox tank 100. The first-stage water distribution pipe 200 includes a first-stage main inlet pipe 210 and a first-stage branch water distribution pipe 220. The first-stage main inlet pipe 210 and the first-stage branch water distribution pipe 220 are connected, and the first-stage branch water distribution pipe 220 is provided with water distribution holes. The primary inlet pipe 210 delivers wastewater into the primary branch distribution pipe 220, where it is evenly distributed and discharged through the distribution holes. The aeration device 300 is located within the primary anaerobic ammonia oxidation tank 100. The aeration device 300 includes a main air inlet pipe 310 and a branch air pipe 320, which are connected. An aerator 330 is installed on the branch air pipe 320. Gas injected into the main air inlet pipe 310 is evenly distributed through the branch air pipe 320 and discharged from the aerator 330.

[0026] The second-stage anaerobic ammonia oxidation tank 400 contains a biofilm module 410, on which a biofilm is attached and grown. The biofilm module 410 of the second-stage anaerobic ammonia oxidation tank 400 is a biofilm-based anaerobic ammonia oxidation unit. A second-stage water distribution pipe 500 is located within the second-stage anaerobic ammonia oxidation tank 400. The second-stage water distribution pipe 500 includes a second-stage main inlet pipe 510 and a second-stage branch water distribution pipe 520. The second-stage main inlet pipe 510 is connected to the overflow outlet 110 and the second-stage branch water distribution pipe 520. The second-stage branch water distribution pipe 520 is provided with water distribution holes. Wastewater injected into the second-stage main inlet pipe 510 from the overflow outlet 110 is evenly distributed through the second-stage branch water distribution pipe 520 and discharged from the water distribution holes. A stirrer 600 is located within the second-stage anaerobic ammonia oxidation tank 400.

[0027] The biological fermentation wastewater first enters the granular sludge anaerobic ammonia oxidation unit of the first-stage anaerobic ammonia oxidation tank 100, where nitrification and anaerobic ammonia oxidation are completed within the same unit. Most of the ammonia nitrogen in the wastewater is removed, leaving only small amounts of ammonia nitrogen and nitrite nitrogen in the effluent. This operation is less complex and less likely to generate high levels of nitrite nitrogen, which could adversely affect the anaerobic ammonia oxidizing bacteria. Aerator 330 provides sufficient dissolved oxygen while maintaining a low aeration intensity, which helps maintain the granularity of the granular sludge packing material 120.

[0028] The effluent then enters the second-stage anaerobic ammonia oxidation tank 400, a biofilm-based anaerobic ammonia oxidation unit. Through anaerobic ammonia oxidation alone, the ammonia nitrogen and nitrite nitrogen levels are further reduced, achieving a higher emission standard. This operation does not require maintaining a certain ammonia nitrogen concentration for stable nitrification, further improving emission standards. The agitator 600 is responsible for mixing the wastewater to promote contact between the wastewater and microorganisms and prevent short-circuiting.

[0029] Reference Figure 3 In actual operation, the bio-fermentation wastewater enters the first-stage anaerobic ammonia oxidation tank 100 through the first-stage distribution pipe 200, and is then evenly distributed into the first-stage distribution pipe 200 via the first-stage branch distribution pipe 220. Under the aeration conditions of the aeration device 300, most of the ammonia nitrogen in the bio-fermentation wastewater in the first-stage distribution pipe 200 is removed. The treated wastewater flows out from the overflow outlet 110, and then enters the tank through the second-stage distribution pipe 500, where the agitator 600 mixes the wastewater evenly. The wastewater is discharged after further reduction of total nitrogen.

[0030] In some embodiments of this utility model, reference is made to Figure 1 The aerator 330 is located below the first-stage branch water distribution pipe 220. It utilizes the high airflow speed of the aeration to improve aeration efficiency.

[0031] In some embodiments of this utility model, reference is made to Figure 2The first-level branch water distribution pipe 220, the branch air pipe 320 and the second-level branch water distribution pipe 520 are horizontal ring-shaped structures to ensure more uniform water distribution and aeration in the pool.

[0032] In some embodiments of this utility model, reference is made to Figure 1 An outlet screen 111 is provided on the overflow outlet 110. The outlet screen 111 has screen holes, through which wastewater can flow into the overflow outlet 110. The outlet screen 111 is used to separate solids, especially the particles of the granular sludge packing 120.

[0033] In some embodiments of this invention, the biofilm component 410 uses K3 type packing material. K3 type packing material has a large specific surface area, providing support for the growth of a large number of microorganisms. Moreover, K3 type packing material has high heat dissipation performance, low resistance, good water and gas distribution performance, easy film formation, and also has the function of cutting air bubbles, thereby improving the efficiency of anaerobic ammonia oxidation reaction.

[0034] In some embodiments of this invention, the biofilm assembly 410 uses MBBR or MABR, which is more reliable and durable.

[0035] In some embodiments of this utility model, the aerator 330 is a diaphragm aerator, which produces bubbles that diffuse evenly and improves aeration efficiency.

[0036] In some embodiments of this utility model, reference is made to Figure 2 The agitator 600 is located at the junction between the inner side wall 401 and the inner bottom wall 402 of the second-stage anaerobic ammonia oxidation tank 400, resulting in a more uniform mixing effect.

[0037] In some embodiments of this utility model, the stirrer 600 is a submersible stirrer, which not only has a high stirring effect, but also prevents the biofilm component 410 or other debris from clogging it.

[0038] In some embodiments of this utility model, reference is made to Figure 1 The second-stage anaerobic ammonia oxidation tank 400 is equipped with several layers of mesh 420, which divide the tank into several layers from top to bottom. Biofilm modules 410 are placed on these meshes 420, ensuring their even distribution within the tank. When no water is introduced, the biofilm modules 410 remain stationary on the meshes 420. After water is introduced, the biofilm modules 410 float in the water but are confined within a predetermined area by the meshes 420, ensuring a sufficiently high wastewater treatment efficiency.

[0039] Other components and operations of the anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0040] The following is for reference. Figure 1 and Figure 2 The anaerobic ammonia oxidation denitrification device for biological fermentation wastewater according to an embodiment of the present invention is described in detail below. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0041] like Figure 1 and Figure 2 As shown, the anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater in this embodiment of the present invention includes a first-stage anaerobic ammonia oxidation tank 100, a first-stage water distribution pipe 200, an aeration device 300, a second-stage anaerobic ammonia oxidation tank 400, a second-stage water distribution pipe 500, and a stirrer 600.

[0042] The first-stage anaerobic ammonia oxidation tank 100 is a square tank, equipped with an overflow outlet 110 and an effluent screen plate 111. Granular sludge packing material 120 is installed inside the first-stage anaerobic ammonia oxidation tank 100. The first-stage water distribution pipe 200 includes a first-stage main inlet pipe 210 and a first-stage branch water distribution pipe 220. The first-stage main inlet pipe 210 has a vertical pipe structure, and the first-stage branch water distribution pipe 220 has a horizontal annular pipe structure. The aeration device 300 includes a main air inlet pipe 310, a branch air pipe 320, and an aerator 330. The main air inlet pipe 310 has a vertical pipe structure, and the branch air pipe 320 has a horizontal annular pipe structure.

[0043] The second-stage anaerobic ammonia oxidation tank 400 is a square tank, and it contains a biofilm module 410, a layer mesh 420, and a stirrer 600. The second-stage water distribution pipe 500 includes a second-stage main inlet pipe 510 and a second-stage branch water distribution pipe 520. The second-stage main inlet pipe 510 is a vertical pipe structure, and the second-stage branch water distribution pipe 520 is a horizontal ring pipe structure.

[0044] According to the anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to the embodiments of this utility model, the following effects can be achieved by setting it up as follows: the biological fermentation wastewater first enters the first-stage anaerobic ammonia oxidation tank 100, where nitrification and anaerobic ammonia oxidation processes are completed simultaneously through the granular sludge packing material 120. Most of the ammonia nitrogen in the wastewater is removed, and the effluent contains only a small amount of ammonia nitrogen and nitrite nitrogen. Then, the effluent enters the second-stage anaerobic ammonia oxidation tank 400, where anaerobic ammonia oxidation is carried out through the biofilm component 410 to further reduce the ammonia nitrogen and nitrite nitrogen, thereby further improving the emission standards. The above treatment method can improve wastewater treatment efficiency, reduce the land area, reduce aeration energy consumption, reduce the input of organic carbon sources, and reduce sludge production.

[0045] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An anaerobic ammonia oxidation denitrification device for biological fermentation wastewater, characterized in that, include: The first-stage anaerobic ammonia oxidation tank (100) is equipped with granular sludge packing material (120). The granular sludge packing material (120) includes nitrifying packing material and anaerobic ammonia oxidation packing material. Nitrifying bacteria are attached to the nitrifying packing material, and anaerobic ammonia oxidation bacteria are attached to the anaerobic ammonia oxidation packing material. An overflow outlet (110) is provided on the upper side of the first-stage anaerobic ammonia oxidation tank (100). The first-stage water distribution pipe (200) is located inside the first-stage anaerobic ammonia oxidation tank (100). The first-stage water distribution pipe (200) includes a first-stage main water inlet pipe (210) and a first-stage branch water distribution pipe (220). The first-stage main water inlet pipe (210) is connected to the first-stage branch water distribution pipe (220). The first-stage branch water distribution pipe (220) is provided with water distribution holes. An aeration device (300) is located in the first-stage anaerobic ammonia oxidation tank (100). The aeration device (300) includes a main air inlet pipe (310) and a branch air pipe (320). The main air inlet pipe (310) is connected to the branch air pipe (320). An aerator (330) is installed on the branch air pipe (320). The second-stage anaerobic ammonia oxidation tank (400) is equipped with a biofilm module (410), on which a biofilm is attached and grown; The second-stage water distribution pipe (500) is located inside the second-stage anaerobic ammonia oxidation tank (400). The second-stage water distribution pipe (500) includes a second-stage main water inlet pipe (510) and a second-stage branch water distribution pipe (520). The second-stage main water inlet pipe (510) is connected to the overflow outlet (110) and the second-stage branch water distribution pipe (520). The second-stage branch water distribution pipe (520) is provided with water distribution holes. A stirrer (600) is located inside the second-stage anaerobic ammonia oxidation tank (400).

2. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1, characterized in that, The aerator (330) is located below the first-level branch water distribution pipe (220).

3. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1 or 2, characterized in that, The first-level branch water distribution pipe (220), the branch air pipe (320) and the second-level branch water distribution pipe (520) are horizontal ring-shaped structures.

4. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1, characterized in that, The overflow outlet (110) is provided with a water outlet screen plate (111), and the water outlet screen plate (111) has screen holes.

5. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1, characterized in that, The biofilm module (410) uses K3 type packing material.

6. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1 or 5, characterized in that, The biofilm assembly (410) uses MBBR or MABR.

7. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1, characterized in that, The aerator (330) is a diaphragm aerator.

8. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1, characterized in that, The stirrer (600) is located at the junction between the inner sidewall (401) and the inner bottom wall (402) of the second-stage anaerobic ammonia oxidation tank (400).

9. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1 or 8, characterized in that, The agitator (600) is a submersible agitator.

10. The anaerobic ammonia oxidation denitrification equipment for biological fermentation wastewater according to claim 1, characterized in that, The second-stage anaerobic ammonia oxidation tank (400) is provided with several layers of mesh (420), which are distributed from top to bottom to divide the second-stage anaerobic ammonia oxidation tank (400) into several layers, and the biofilm component (410) is placed on the mesh (420).

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