Equipment for treating high nitrate and copper ammonia wastewater

Abstract

The utility model discloses equipment for treating high nitrate and copper ammonia wastewater, which belongs to the technical field of sewage treatment equipment and comprises an ammonia nitrogen wastewater regulating tank, a homogeneous regulating tank, a physicochemical pretreatment tank and a short-cut denitrification coupling anaerobic ammonia oxidation reactor which are sequentially connected, and a nitric acid wastewater regulating tank is arranged on one side of the homogeneous regulating tank; the nitric acid wastewater adjusting tank is communicated with the upper part of the homogeneous adjusting tank through a second pipe, a stirrer is arranged in the short-cut denitrification coupling anaerobic ammonia oxidation reactor, and K3 filler is arranged in the short-cut denitrification coupling anaerobic ammonia oxidation reactor. The high-concentration NO3 <->-N wastewater is economically and effectively treated, the nitrate nitrogen removal rate is high, and the carbon source demand and the sludge yield are low; aeration is not needed when the high-concentration NH4 < + >-N wastewater is removed through the reaction, the treatment cost is greatly reduced, efficient activity of the two bacteria is kept in the same environment, and the denitrification effect is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewage treatment equipment, and more specifically, relates to a device for treating wastewater with high nitrate and copper ammonia content. Background Technology

[0002] Ammonia is an important nitrogen source, but excessive nitrogen use can easily lead to eutrophication of water bodies. Copper-ammonia wastewater and high-nitrate wastewater are common and difficult-to-treat high-nitrogen wastewaters in industry. Currently, the main methods for treating copper-ammonia wastewater include stripping, breakpoint chlorination, and electrochemical methods. High-nitrogen wastewater cannot meet effluent standards after centralized treatment and requires subsequent biological treatment to achieve discharge compliance. The traditional nitrification-denitrification process used in wastewater treatment plants to treat nitrogen-containing wastewater consumes a large amount of aeration, while denitrification requires a large number of electron donors to convert nitrate nitrogen into nitrogen gas. This results in high operating costs and generates large amounts of residual sludge and greenhouse gases, causing significant environmental damage.

[0003] Anammox is considered the most cost-effective and ecologically acceptable method for biological nitrogen removal from wastewater. In anammox, anammox bacteria use NO2 as a nitrogen source. - -N is the electron acceptor, directly accepting NH4+. + -N is reduced to N2 without the need for oxygen or organic matter. Therefore, it can significantly reduce oxygen demand and sludge production, while eliminating the need for an external carbon source. This technology is characterized by low consumption, high efficiency, and environmental friendliness, making it the most economical and efficient nitrogen removal process to date. However, anaerobic ammonia oxidation cannot remove NO3 from wastewater. - -N, and because the reaction produces 11% NO3. - -N will produce nitrogen residue, which will severely degrade the denitrification performance of the system. Utility Model Content

[0004] The main objective of this invention is to provide a device for treating wastewater with high nitrate and copper ammonia content, in order to solve the problems mentioned above in the background.

[0005] According to a first aspect of the present invention, a device for treating high nitrate and copper ammonia wastewater is provided, comprising an ammonia nitrogen wastewater equalization tank, a homogenization equalization tank, a physicochemical pretreatment tank, and a short-cut denitrification coupled anaerobic ammonia oxidation reactor connected in sequence. A nitric acid wastewater equalization tank is provided on one side of the homogenization equalization tank, and the nitric acid wastewater equalization tank is connected to the upper part of the homogenization equalization tank through a second pipe. A stirrer is provided inside the short-cut denitrification coupled anaerobic ammonia oxidation reactor, and K3 packing material is provided inside the short-cut denitrification coupled anaerobic ammonia oxidation reactor.

[0006] In a specific embodiment of this utility model, a storage tank for storing alkali, a high-level tank for polyaluminum chloride, and a high-level tank for polyacrylamide are sequentially arranged above the physicochemical pretreatment tank. The storage tank is connected to the upper part of the physicochemical pretreatment tank through a fourth pipe, the high-level tank for polyaluminum chloride is connected to the upper part of the physicochemical pretreatment tank through a fifth pipe, and the high-level tank for polyacrylamide is connected to the upper part of the physicochemical pretreatment tank through a sixth pipe.

[0007] In a specific embodiment of this utility model, the physicochemical pretreatment tank is equipped with an online pH meter.

[0008] In a specific embodiment of this utility model, a filter press and a product water tank are provided between the physicochemical pretreatment tank and the short-cut denitrification coupled anaerobic ammonium oxidation reactor. The physicochemical pretreatment tank is connected to the filter press through a seventh pipe, the filter press is connected to the product water tank through an eighth pipe, and the product water tank is connected to the short-cut denitrification coupled anaerobic ammonium oxidation reactor through a ninth pipe. A fourth lift pump is installed on the ninth pipe.

[0009] In a specific embodiment of this utility model, the bottom of the filter press is provided with a first sludge discharge outlet.

[0010] In a specific embodiment of this utility model, a nutrient solution tank is provided above the short-cut denitrification coupled anaerobic ammonium oxidation reactor, and the nutrient solution tank is connected to the upper part of the short-cut denitrification coupled anaerobic ammonium oxidation reactor through a tenth pipe.

[0011] In a specific embodiment of this utility model, the short-cut denitrification coupled anaerobic ammonium oxidation reactor is connected to a sludge sedimentation tank through an eleventh pipe. The sludge sedimentation tank is located on one side of the short-cut denitrification coupled anaerobic ammonium oxidation reactor and has a product water outlet.

[0012] In a specific embodiment of this utility model, the bottom of the sludge sedimentation tank is provided with a second sludge outlet, which is connected to a short-cut denitrification coupled anaerobic ammonia oxidation reactor through a twelfth pipe.

[0013] In a specific embodiment of this utility model, the ammonia nitrogen wastewater equalization tank is connected to the upper part of the homogenization equalization tank through a first pipe, and the homogenization equalization tank is connected to the upper part of the physicochemical pretreatment tank through a third pipe. A first lift pump and a first electromagnetic flow meter are installed on the first pipe, a second lift pump and a second electromagnetic flow meter are installed on the second pipe, and a third lift pump is installed on the third pipe.

[0014] In a specific embodiment of this utility model, the homogenization and conditioning tank is equipped with an online conductivity meter, and the upper part of the homogenization and conditioning tank is connected to a recycled water pipeline.

[0015] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:

[0016] This invention utilizes ammonia nitrogen wastewater and nitric acid wastewater equalization tanks to transport water to a homogenization tank for mixing, sedimentation, and oxidation. The water is then transported from the equalization tank to a physicochemical pretreatment tank for further treatment, improving efficiency. Finally, the water is transported to a short-cut denitrification coupled anaerobic ammonia oxidation reactor, where K3 packing material is added. Long-term stirring with a mixer allows microorganisms to exist in the form of a biofilm, preventing them from being eliminated under antimicrobial stress due to excessive competition from short-cut denitrifying bacteria. This ensures that both types of bacteria maintain high activity under the same environment and achieves high nitrogen removal efficiency. This equipment can simultaneously treat wastewater containing ammonia nitrogen and nitrate nitrogen, achieving high concentrations of NO3. - -N wastewater treatment is economical and effective, with high nitrate nitrogen removal rate, low carbon source demand, and low sludge production; high concentrations of NH4 are removed by reaction. + -N wastewater does not require aeration, which greatly reduces treatment costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a schematic diagram of the structure of a device for treating high nitrate and copper ammonia wastewater in one embodiment of this utility model. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of the 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.

[0020] 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.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements, an indirect connection, or an interaction between two elements.

[0024] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0025] Reference Figure 1 As shown, a device for treating high nitrate and copper ammonia wastewater is provided, comprising an ammonia nitrogen wastewater equalization tank 1, a homogenization equalization tank 7, a physicochemical pretreatment tank 10, and a short-cut denitrification coupled anaerobic ammonia oxidation reactor 18 connected in sequence. A nitric acid wastewater equalization tank 4 is provided on one side of the homogenization equalization tank 7, and the nitric acid wastewater equalization tank 4 is connected to the upper part of the homogenization equalization tank 7 through a second pipe 32. A stirrer 20 is provided in the short-cut denitrification coupled anaerobic ammonia oxidation reactor 18, and K3 packing material is provided in the short-cut denitrification coupled anaerobic ammonia oxidation reactor 18.

[0026] In this embodiment, the ammonia nitrogen wastewater equalization tank 1 contains a high concentration of NH4. + -N, Nitric acid wastewater equalization tank 4 contains a high concentration of NO3. - -N, NO3 - -N can be incompletely denitrified to produce NO2 under the action of denitrifying bacteria. - -N, this process is called partial denitrification (PD), which can convert NO3- into nitrogen. - -N's final reduction product is NO2. --N. This demonstrates that the reactants and products of short-cut denitrification and anaerobic ammonium oxidation complement each other; the short-cut denitrification process not only consumes the NO3 accumulated during anaerobic ammonium oxidation. - -N can also provide NO2, an electron acceptor essential for the metabolism of anaerobic ammonia-oxidizing bacteria. - The development of a coupled short-cut denitrification and anaerobic ammonium oxidation (PD / A) process has provided a new direction for biological nitrogen removal. By combining short-cut denitrification and anaerobic ammonium oxidation, high concentrations of NH4 in synthetic wastewater can be achieved. + -N and NO3 - Simultaneous removal of -N: Both the ammonia nitrogen wastewater equalization tank 1 and the nitric acid wastewater equalization tank 4 can regulate the water volume to avoid excessive or insufficient equipment load due to fluctuations in influent flow, ensuring stable operation of the treatment system. K3 packing material is added to the short-cut denitrification coupled anaerobic ammonia oxidation reactor 18. After stirring by the mixer 20, the microorganisms exist in the form of a biofilm, avoiding excessive competition from short-cut denitrifying bacteria and elimination under antibacterial stress. Moreover, the biofilm process can retain more microorganisms and reduce the flushing of anaerobic ammonia oxidizing bacteria by wastewater, and provide space for the growth and reproduction of anaerobic ammonia oxidizing bacteria.

[0027] Furthermore, the short-cut denitrification coupled anaerobic ammonia oxidation reactor 18 is equipped with multiple outlets and inlets. The outlets are connected to an outlet pump, and the inlets are connected to an inlet pump. The inlet pumps are connected to corresponding storage tanks, which store carbon sources or high-nitrate and high-ammonia nitrogen wastewater.

[0028] In one embodiment of this utility model, a storage tank 11 for storing alkali, a high-level tank 12 for polyaluminum chloride, and a high-level tank 13 for polyacrylamide are sequentially arranged above the physicochemical pretreatment tank 10. The storage tank 11 is connected to the upper part of the physicochemical pretreatment tank via a fourth pipe 34. The high-level tank 12 for polyaluminum chloride is connected to the upper part of the physicochemical pretreatment tank 10 via a fifth pipe 35. The high-level tank 13 for polyacrylamide is connected to the upper part of the physicochemical pretreatment tank 10 via a sixth pipe 36. The storage tank 11, containing alkali, is used to add alkali to the physicochemical pretreatment tank 10 to adjust the pH value. The high-level tank for polyaluminum chloride is also... The tank is called a PAC high-level tank. PAC is an inorganic polymer coagulant with multiple functions such as water purification, sterilization, deodorization, degreasing, and turbidity removal. The polyacrylamide high-level tank is also called a PAM high-level tank to provide a stable PAM solution to the system. PAM is an important water treatment agent, mainly used for flocculation, clarification, and water purification. Each tank transports the contents to the physicochemical pretreatment tank 10 through corresponding pipes. Suspended solids, grease, and recalcitrant organic matter in the wastewater are removed by physical and chemical methods to ensure that these pollutants do not have a negative impact on the subsequent biological treatment process.

[0029] Preferably, the physicochemical pretreatment tank 10 is equipped with an online pH meter 14, which can monitor the pH changes in the physicochemical pretreatment tank 10 in real time.

[0030] In one embodiment of this utility model, a filter press 15 and a product water tank 16 are provided between the physicochemical pretreatment tank 10 and the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18. The filter press 15 mainly achieves solid-liquid separation through pressure. The product water tank 16 can improve treatment efficiency, reduce treatment costs, and regulate water quality. The physicochemical pretreatment tank 10 is connected to the filter press 15 through the seventh pipe 37. The filter press 15 is connected to the product water tank 16 through the eighth pipe 38. The product water tank 16 is connected to the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18 through the ninth pipe 39. A fourth lift pump 17 is installed on the ninth pipe 39. The fourth lift pump 17 helps to draw water from the product water tank 16 into the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18.

[0031] Furthermore, the filter press 15 is provided with a first sludge discharge outlet at the bottom. The filter press 15 can achieve solid-liquid separation, separating the sludge in the wastewater from the water. The sludge settles downward under pressure and is discharged through the first sludge discharge outlet. The discharged sludge is then treated by physical and chemical methods.

[0032] In one embodiment of this utility model, a nutrient solution tank 19 is provided above the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18. The nutrient solution tank 19 is connected to the upper part of the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18 through the tenth pipe 40. The nutrient solution tank 19 is mainly used to provide the nutrients required by microorganisms, promote the growth and metabolism of microorganisms, and thus improve the effect of wastewater treatment.

[0033] In one embodiment of this utility model, the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18 is connected to the sludge sedimentation tank 21 through the eleventh pipe 41. The sludge sedimentation tank 21 is located on one side of the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18. The sludge sedimentation tank 21 is provided with a product water outlet 22. Furthermore, the bottom of the sludge sedimentation tank 21 is provided with a second sludge discharge outlet, which is connected to the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18 through the twelfth pipe 42. During the effluent stage, it is unavoidable that sludge will be discharged from the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18. In order to ensure the stability of the sludge concentration in the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18, a sludge sedimentation tank 21 and a sludge return device are set after the effluent of the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18, which ensures the high abundance of bacteria in the short-cut denitrification coupled anaerobic ammonium oxidation reactor 18.

[0034] In one embodiment of this utility model, the ammonia nitrogen wastewater equalization tank 1 is connected to the upper part of the homogenization equalization tank 7 through the first pipe 31, and the homogenization equalization tank 7 is connected to the upper part of the physicochemical pretreatment tank 10 through the third pipe 33. The first pipe 31 is equipped with a first lift pump 2 and a first electromagnetic flowmeter 3, the second pipe 32 is equipped with a second lift pump 5 and a second electromagnetic flowmeter 6, and the third pipe 33 is equipped with a third lift pump 9. The first lift pump 2, the second lift pump 5, and the third lift pump 9 are all used to raise the water level, so as to facilitate the pumping of wastewater into the homogenization equalization tank 7 and then into the physicochemical pretreatment tank 10. The first electromagnetic flowmeter 3 and the second electromagnetic flowmeter 6 are used for wastewater flow detection and flow control.

[0035] In one embodiment of this utility model, the homogenization and equalization tank 7 is equipped with an online conductivity meter 8, which is used to monitor the conductivity of wastewater and help to understand the removal of pollutants during the wastewater treatment process. The upper part of the homogenization and equalization tank 7 is connected to the recycled water pipeline.

[0036] 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. A device for treating high nitrate and copper ammonia wastewater, comprising an ammonia nitrogen wastewater equalization tank (1), a homogenization equalization tank (7), a physicochemical pretreatment tank (10), and a short-cut denitrification coupled anaerobic ammonia oxidation reactor (18) connected in sequence, characterized in that, A nitric acid wastewater conditioning tank (4) is provided on one side of the homogenization conditioning tank (7). The nitric acid wastewater conditioning tank (4) is connected to the upper part of the homogenization conditioning tank (7) through a second pipe (32). A stirrer (20) is provided in the short-cut denitrification coupled anaerobic ammonia oxidation reactor (18). K3 packing is provided in the short-cut denitrification coupled anaerobic ammonia oxidation reactor (18).

2. The equipment for treating high-nitrate and copper-ammonia wastewater according to claim 1, characterized in that, Above the physicochemical pretreatment tank (10) are arranged a storage tank (11) for storing alkali, a high-level tank (12) for polyaluminum chloride, and a high-level tank (13) for polyacrylamide. The storage tank (11) is connected to the upper part of the physicochemical pretreatment tank (10) through a fourth pipe (34). The high-level tank (12) for polyaluminum chloride is connected to the upper part of the physicochemical pretreatment tank (10) through a fifth pipe (35). The high-level tank (13) for polyacrylamide is connected to the upper part of the physicochemical pretreatment tank (10) through a sixth pipe (36).

3. The equipment for treating high-nitrate and copper-ammonia wastewater according to claim 2, characterized in that, The physicochemical pretreatment tank (10) is equipped with an online pH meter (14).

4. The equipment for treating high-nitrate and copper-ammonia wastewater according to claim 1, characterized in that, A filter press (15) and a product water tank (16) are provided between the physicochemical pretreatment tank (10) and the short-cut denitrification coupled anaerobic ammonia oxidation reactor (18). The physicochemical pretreatment tank (10) is connected to the filter press (15) through the seventh pipe (37). The filter press (15) is connected to the product water tank (16) through the eighth pipe (38). The product water tank (16) is connected to the short-cut denitrification coupled anaerobic ammonia oxidation reactor (18) through the ninth pipe (39). A fourth lift pump (17) is installed on the ninth pipe (39).

5. The equipment for treating high-nitrate and copper-ammonia wastewater according to claim 4, characterized in that, The filter press (15) is provided with a first sludge discharge port at the bottom.

6. The equipment for treating high-nitrate and copper-ammonia wastewater according to claim 1, characterized in that, A nutrient solution tank (19) is provided above the short-cut denitrification coupled anaerobic ammonium oxidation reactor (18), and the nutrient solution tank (19) is connected to the upper part of the short-cut denitrification coupled anaerobic ammonium oxidation reactor (18) through a tenth pipe (40).

7. The equipment for treating high-nitrate and copper-ammonia wastewater according to claim 6, characterized in that, The short-cut denitrification coupled anaerobic ammonia oxidation reactor (18) is connected to the sludge sedimentation tank (21) through the eleventh pipe (41). The sludge sedimentation tank (21) is located on one side of the short-cut denitrification coupled anaerobic ammonia oxidation reactor (18), and the sludge sedimentation tank (21) is provided with a product water outlet (22).

8. The equipment for treating high nitrate and copper ammonia wastewater according to claim 7, characterized in that, The bottom of the sludge sedimentation tank (21) is provided with a second sludge outlet, which is connected to the short-cut denitrification coupled anaerobic ammonia oxidation reactor (18) through the twelfth pipe (42).

9. The equipment for treating high nitrate and copper ammonia wastewater according to claim 1, characterized in that, The ammonia nitrogen wastewater equalization tank (1) is connected to the upper part of the homogenization equalization tank (7) through the first pipe (31), and the homogenization equalization tank (7) is connected to the upper part of the physicochemical pretreatment tank (10) through the third pipe (33). The first pipe (31) is equipped with a first lift pump (2) and a first electromagnetic flowmeter (3), the second pipe (32) is equipped with a second lift pump (5) and a second electromagnetic flowmeter (6), and the third pipe (33) is equipped with a third lift pump (9).

10. The equipment for treating high nitrate and copper ammonia wastewater according to claim 1, characterized in that, The homogenization and conditioning tank (7) is equipped with an online conductivity meter (8), and the upper part of the homogenization and conditioning tank (7) is connected to the recycled water pipeline.

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