High-efficiency multi-path denitrification device based on biological filler setting optimization

Abstract

The utility model discloses a kind of efficient multi-path denitrification device based on biological filler setting optimization, it is related to water treatment technical field, including shell, the lateral wall of shell is connected and is installed with water inlet pipe, five The partition plate separates the shell cavity of shell into anaerobic pool, primary anoxic pool, secondary anoxic pool, primary aerobic pool, secondary aerobic pool and sedimentation tank;In the utility model, by being provided with iron autotrophic denitrification filler porous suspended filler, due to its own structural characteristics, its dissolved oxygen concentration gradient not only exists in the formed biofilm, but also there is dissolved oxygen concentration gradient from the surface layer to the inner layer of filler, so that the nitrous acid bacteria and nitrate bacteria of inner layer are in low dissolved oxygen environment for a long time, a large amount of accumulation of nitrogen dioxide is realized by short path nitrification reaction, by the reasonable configuration of filler, it can effectively improve denitrification effect, ensure the normal operation of processing facility and stable discharge standard.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a highly efficient multi-pathway denitrification device based on optimized biological packing material settings. Background Technology

[0002] Most urban wastewater treatment plants in my country rely on traditional biological denitrification. Insufficient influent carbon sources and low carbon-to-nitrogen ratios make it difficult for effluent to consistently meet the Class A total nitrogen effluent standard of the "Discharge Standard of Pollutants for Urban Wastewater Treatment Plants". To improve nitrogen removal, additional carbon sources are often required, which not only increases operating costs but also increases emissions of greenhouse gases such as carbon dioxide. Therefore, under the "dual carbon" strategy, the research and application of new wastewater treatment processes with strong denitrification capacity and low energy consumption for operation and maintenance are urgently needed.

[0003] Biological packing media immobilizes activated sludge in the reactor as a biofilm, achieving separation of sludge retention time and hydraulic retention time. The biofilm contains a dissolved oxygen concentration gradient, suitable for the growth of various denitrifying bacteria. The biofilm has a strong adsorption capacity, adsorbing large amounts of organic matter and other nutrients from wastewater onto its surface to maintain microbial metabolism and promote the enrichment of easily lost bacteria with longer sludge ages. Therefore, simultaneous nitrification-denitrification, short-cut nitrification-denitrification, and anaerobic ammonia oxidation can occur on the biofilm formed by the packing media. However, different biological packing media have varying wastewater treatment efficiencies. Even with the same type of biological packing media, variations in packing size, addition method, and dosage will produce different treatment effects. Currently, research on the adaptability of packing media is relatively lacking, resulting in a lack of professional matching solutions in the selection and application of biological packing media. Therefore, this paper proposes a highly efficient multi-pathway denitrification device based on optimized biological packing media setup. Utility Model Content

[0004] In view of the above-mentioned problems in the prior art, this utility model is proposed.

[0005] The purpose of this invention is to provide a highly efficient multi-pathway denitrification device based on optimized biological packing, which aims to solve the problem of low overall denitrification efficiency of current denitrification devices.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-efficiency multi-pathway denitrification device based on optimized biological packing, which includes an outer shell, an inlet pipe connected to the side wall of the outer shell, an outlet pipe connected to the other side wall of the outer shell, and five partitions fixedly installed on the inner surface of the outer shell, which divide the shell cavity into an anaerobic tank, a primary anoxic tank, a secondary anoxic tank, a primary aerobic tank, a secondary aerobic tank, and a sedimentation tank.

[0007] As a preferred embodiment of the present invention, a highly efficient multi-pathway denitrification device based on optimized biological packing configuration, wherein: connecting pipes are installed on the inner walls of the partitions; an anoxic tank return pipe is fixedly installed on the inner wall of the partition between the anaerobic tank and the primary anoxic tank; and a second nitrification liquid return pipe is fixedly installed on the inner wall of the partition between the secondary anoxic tank and the primary aerobic tank.

[0008] As a preferred embodiment of the efficient multi-pathway denitrification device based on the optimized setting of biological packing material according to this utility model, wherein: packing material fixing device brackets are fixedly installed on the inner walls of both the primary anoxic tank and the secondary anoxic tank, and adjustable buckles are slidably installed on the inner walls of the packing material fixing device brackets.

[0009] As a preferred embodiment of the present invention, a highly efficient multi-pathway denitrification device based on optimized biological packing configuration, wherein: a detachable packing frame is fixedly installed on the side wall of the adjustable buckle, and an iron autotrophic denitrification packing is provided on the inner wall of the detachable packing frame.

[0010] As a preferred embodiment of the present invention, an efficient multi-pathway denitrification device based on optimized biological packing is provided, wherein: aerators are fixedly installed on the inner walls of the bottom surface of the primary aerobic tank and the secondary aerobic tank, and porous suspended packing is provided inside the primary aerobic tank and the secondary aerobic tank.

[0011] As a preferred embodiment of the present invention, a high-efficiency multi-pathway denitrification device based on optimized biological packing is provided, wherein: a water injection pipe, a first nitrification liquid return pipe and a sludge return pipe are connected and installed on the outer surface of the shell, and one end of the water injection pipe is connected to the first-stage anoxic tank.

[0012] As a preferred embodiment of the efficient multi-pathway denitrification device based on the optimized setting of biological packing material according to this utility model, one end of the first nitrification liquid return pipe is connected to the secondary aerobic tank, and the other end of the first nitrification liquid return pipe is connected to the primary anoxic tank.

[0013] As a preferred embodiment of the efficient multi-pathway denitrification device based on the optimized setting of biological packing material according to this utility model, one end of the sludge return pipe is connected to the sedimentation tank, and the other end of the sludge return pipe is connected to the primary anoxic tank.

[0014] As a preferred embodiment of the present invention, a high-efficiency multi-pathway denitrification device based on optimized biological packing is provided, wherein: activated sludge is provided inside the anaerobic tank, the primary anoxic tank, the secondary anoxic tank, the primary aerobic tank, and the secondary aerobic tank; agitators are provided inside the anaerobic tank, the primary anoxic tank, and the secondary anoxic tank; and reflux pumps are fixedly installed inside the primary aerobic tank and the secondary aerobic tank.

[0015] As a preferred embodiment of the present invention, a highly efficient multi-pathway denitrification device based on optimized biological packing, wherein: the porous suspended packing includes, but is not limited to, polyurethane sponge, Pall rings, and suspended balls; and the iron autotrophic denitrification packing includes, but is not limited to, sponge iron, magnetite, and pyrite.

[0016] The beneficial effects of this utility model of a high-efficiency multi-pathway denitrification device based on optimized biological packing are as follows: By setting up an iron autotrophic denitrification packing porous suspended packing, due to its own structural characteristics, the dissolved oxygen concentration gradient not only exists in the formed biofilm, but also exists from the surface layer to the inner layer of the packing. This allows the nitrite-oxidizing bacteria and nitrifying bacteria in the inner layer to be in a low dissolved oxygen environment for a long time, achieving a large accumulation of nitrogen dioxide through short-range nitrification. Through the reasonable configuration of the packing, the denitrification effect can be effectively improved, ensuring the normal operation of the treatment facility and stable emission compliance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of a high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration according to this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of a high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration according to this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of a highly efficient multi-pathway denitrification device based on optimized biological packing material configuration according to this utility model.

[0021] Figure 4 This is a cross-sectional structural diagram of another angle of the efficient multi-pathway denitrification device based on the optimized setting of biological packing material according to this utility model. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments. Example 1

[0025] Reference Figure 1 This is the first embodiment of the present invention. This embodiment provides a highly efficient multi-pathway denitrification device based on optimized biological packing material settings. It includes a shell 1, with an inlet pipe 2 connected to one side wall and an outlet pipe 3 connected to the other side wall. Five partitions 4 are fixedly installed on the inner surface of the shell 1, dividing the shell cavity into an anaerobic tank 5, a primary anoxic tank 6, a secondary anoxic tank 7, a primary aerobic tank 8, a secondary aerobic tank 9, and a sedimentation tank 10. Connecting pipes 22 are connected to the inner walls of each partition 4. An anoxic tank return pipe 17 is fixedly installed on the inner wall of the partition 4 between the secondary anoxic tank 5 and the primary anoxic tank 6. A second nitrification liquid return pipe 18 is fixedly installed on the inner wall of the partition 4 between the secondary anoxic tank 7 and the primary aerobic tank 8. A packing fixing device bracket 19 is fixedly installed on the inner wall of both the primary anoxic tank 6 and the secondary anoxic tank 7. An adjustable buckle 20 is slidably installed on the inner wall of the packing fixing device bracket 19. A detachable packing frame 21 is fixedly installed on the side wall of the adjustable buckle 20. An iron autotrophic denitrification packing 11 is set on the inner wall of the detachable packing frame 21.

[0026] The specific implementation method is as follows: Urban sewage enters the anaerobic tank 5 through the inlet pipe 2 and the primary anoxic tank 6 through the injection pipe 14. The anaerobic tank 5 has a hydraulic retention period of time. The sewage mixture after treatment in the anaerobic tank 5 enters the primary anoxic tank 6. Then, the sewage mixture has a hydraulic retention period of time in the primary anoxic tank 6 and the secondary anoxic tank 7. Then, iron autotrophic denitrification packing 11 is added into the detachable packing frame 21. The detachable packing frame 21 is then fixed in the packing fixing device bracket 19 by the adjustable buckle 20. The sewage mixture undergoes a denitrification reaction in the primary anoxic tank 6 and then undergoes a denitrification reaction in the secondary anoxic tank 7. At the same time, the iron autotrophic denitrification packing 11 promotes the denitrification process and also promotes flocculation and sedimentation.

[0027] Aerators 13 are fixedly installed on the inner walls of the bottom surfaces of the primary aerobic tank 8 and the secondary aerobic tank 9. Porous suspended packing material 12 is installed inside the primary aerobic tank 8 and the secondary aerobic tank 9. A water injection pipe 14, a first nitrification liquid return pipe 15, and a sludge return pipe 16 are connected to the outer surface of the outer shell 1. One end of the water injection pipe 14 is connected to the primary anoxic tank 6, one end of the first nitrification liquid return pipe 15 is connected to the secondary aerobic tank 9, and the other end of the first nitrification liquid return pipe 15 is connected to the primary anoxic tank 6. One end of the sludge return pipe 16 is connected to the sedimentation tank 1. The sludge return pipe 16 is connected to the first-stage anoxic tank 6 at the other end. Activated sludge is installed inside the anaerobic tank 5, the first-stage anoxic tank 6, the second-stage anoxic tank 7, the first-stage aerobic tank 8, and the second-stage aerobic tank 9. Agitators are installed inside the anaerobic tank 5, the first-stage anoxic tank 6, and the second-stage anoxic tank 7. Return pumps are fixedly installed inside the first-stage aerobic tank 8 and the second-stage aerobic tank 9. The porous suspended packing 12 includes, but is not limited to, polyurethane sponge, Pall rings, and suspended balls. The iron autotrophic denitrification packing 11 includes, but is not limited to, sponge iron, magnetite, and pyrite.

[0028] The specific implementation method is as follows: the wastewater treated by the secondary anoxic tank 7 enters the primary aerobic tank 8, and then stays in the primary aerobic tank 8 and the secondary aerobic tank 9 for a period of time. The aerators 13 in the primary aerobic tank 8 and the secondary aerobic tank 9 provide an aerobic environment for nitrifying bacteria. At the same time, the porous suspended packing 12 enriches microorganisms and provides multiple dissolved oxygen gradients, enriching a rich variety of bacterial species. While ensuring the nitrification effect, it promotes the occurrence of short-cut nitrification reaction in the tank. The first nitrification liquid return pipe 15 and the second nitrification liquid return pipe 18 supply substrate for the anaerobic ammonia oxidation reaction in the primary anoxic tank 6 and the secondary anoxic tank 7. In this way, the device achieves simultaneous nitrification and denitrification, short-cut nitrification and denitrification, and anaerobic ammonia oxidation reaction to synergistically remove nitrogen. The wastewater treated by the secondary aerobic tank 9 enters the sedimentation tank 10, and the settled sludge returns to the primary anoxic tank 6 through the sludge return pipe 16.

[0029] Working principle: Urban sewage enters the anaerobic tank 5 through the inlet pipe 2 and the primary anoxic tank 6 through the injection pipe 14. The anaerobic tank 5 has a hydraulic retention period of time. The sewage mixture after treatment in the anaerobic tank 5 enters the primary anoxic tank 6. Then, the sewage mixture has a hydraulic retention period of time in the primary anoxic tank 6 and the secondary anoxic tank 7. Then, iron autotrophic denitrification packing 11 is added into the detachable packing frame 21. The detachable packing frame 21 is then fixed in the packing fixing device bracket 19 by the adjustable buckle 20. The sewage mixture undergoes a denitrification reaction in the primary anoxic tank 6 and then enters the secondary anoxic tank 7 for a denitrification reaction. At the same time, the iron autotrophic denitrification packing 11 promotes the denitrification process and also promotes flocculation and sedimentation.

[0030] Wastewater treated in the secondary anoxic tank 7 enters the primary aerobic tank 8, and then remains in the primary aerobic tank 8 and the secondary aerobic tank 9 for a period of time. The aerators 13 in the primary aerobic tank 8 and the secondary aerobic tank 9 provide an aerobic environment for nitrifying bacteria. At the same time, the porous suspended packing 12 enriches microorganisms and provides multiple dissolved oxygen gradients, enriching a rich variety of bacterial species. This ensures the nitrification effect while promoting short-cut nitrification in the tanks. The first nitrified liquid return pipe 15 and the second nitrified liquid return pipe 18 supply substrate for the anaerobic ammonia oxidation reaction in the primary anoxic tank 6 and the secondary anoxic tank 7. This enables the device to achieve simultaneous nitrification and denitrification, short-cut nitrification and denitrification, and anaerobic ammonia oxidation reaction for synergistic denitrification. Wastewater treated in the secondary aerobic tank 9 enters the sedimentation tank 10, and the settled sludge returns to the primary anoxic tank 6 through the sludge return pipe 16.

[0031] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0032] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0033] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A highly efficient multi-pathway denitrification device based on optimized biological packing material configuration, characterized in that: The outer shell (1) has an inlet pipe (2) connected to the side wall of the outer shell (1) and an outlet pipe (3) connected to the other side wall of the outer shell (1). Five partitions (4) are fixedly installed on the inner surface of the outer shell (1). The five partitions (4) divide the shell cavity of the outer shell (1) into an anaerobic tank (5), a primary anoxic tank (6), a secondary anoxic tank (7), a primary aerobic tank (8), a secondary aerobic tank (9), and a sedimentation tank (10).

2. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 1, characterized in that: Connecting pipes (22) are installed on the inner wall of each partition (4). An anoxic tank return pipe (17) is fixedly installed on the inner wall of the partition (4) between the anaerobic tank (5) and the first-level anoxic tank (6). A second nitrification liquid return pipe (18) is fixedly installed on the inner wall of the partition (4) between the second-level anoxic tank (7) and the first-level aerobic tank (8).

3. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 2, characterized in that: The inner walls of the primary anoxic pool (6) and the secondary anoxic pool (7) are both fixedly installed with packing fixing device brackets (19), and adjustable buckles (20) are slidably installed on the inner walls of the packing fixing device brackets (19).

4. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 3, characterized in that: A detachable packing frame (21) is fixedly installed on the side wall of the adjustable buckle (20), and an iron autotrophic denitrification packing (11) is provided on the inner wall of the detachable packing frame (21).

5. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 4, characterized in that: Aerators (13) are fixedly installed on the bottom inner walls of the primary aerobic tank (8) and the secondary aerobic tank (9), and porous suspended packing (12) is provided inside the primary aerobic tank (8) and the secondary aerobic tank (9).

6. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 5, characterized in that: The outer surface of the outer shell (1) is connected to a water injection pipe (14), a first nitrification liquid return pipe (15) and a sludge return pipe (16), and one end of the water injection pipe (14) is connected to the first-stage anoxic tank (6).

7. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 6, characterized in that: One end of the first nitrification liquid return pipe (15) is connected to the secondary aerobic tank (9), and the other end of the first nitrification liquid return pipe (15) is connected to the primary anoxic tank (6).

8. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 7, characterized in that: One end of the sludge return pipe (16) is connected to the sedimentation tank (10), and the other end of the sludge return pipe (16) is connected to the primary anoxic tank (6).

9. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 8, characterized in that: The anaerobic tank (5), the primary anoxic tank (6), the secondary anoxic tank (7), the primary aerobic tank (8), and the secondary aerobic tank (9) are all equipped with activated sludge. The anaerobic tank (5), the primary anoxic tank (6), and the secondary anoxic tank (7) are equipped with agitators. The primary aerobic tank (8) and the secondary aerobic tank (9) are all equipped with fixed reflux pumps.

10. The high-efficiency multi-pathway denitrification device based on optimized biological packing material configuration as described in claim 9, characterized in that: The porous suspended packing (12) includes, but is not limited to, polyurethane sponge, Pall rings, and suspended balls, and the iron autotrophic denitrification packing (11) includes, but is not limited to, sponge iron, magnetite, and pyrite.

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