Potato starch wastewater treatment device

Abstract

The utility model provides a potato starch wastewater treatment device which comprises a pretreatment deproteinization treatment system, a regulating tank is arranged on one side of the pretreatment deproteinization treatment system, a water distribution tank is arranged on one side of the regulating tank, and sewage pipelines are fixedly connected among the pretreatment deproteinization treatment system, the regulating tank and the water distribution tank. An anaerobic sedimentation tank is arranged on one side of the water distribution tank, an A / O reaction tank, a secondary sedimentation tank and an external drainage tank are sequentially arranged on one side of the anaerobic sedimentation tank, and the A / O reaction tank, the secondary sedimentation tank and the external drainage tank are connected through sewage pipelines. The pretreatment deproteinization process is set, protein is solidified and extracted, the discharge amount of organic matter can be reduced by about 60%, the wastewater treatment load is greatly reduced, meanwhile, certain economic benefits are achieved, and the regulating tank is arranged to ensure that the quality and quantity of incoming water are uniform and stable; by arranging the water distribution tank, water quality parameters can be allocated, and a good foundation is laid for subsequent anaerobic biochemistry.

Description

Technical Field

[0001] The utility model relates to the relevant field of starch high-concentration wastewater treatment engineering, and specifically relates to a potato starch wastewater treatment device. Background Art

[0002] Potato starch is widely used in textile, oil extraction, feed and food industries. The development of international and domestic food markets has led to a surge in demand for high-refined potato starch. In addition, potato starch has natural properties that cannot be replaced by other starches, making it the preferred product for starch deep processing industries at home and abroad, with broad sales and promising market prospects. The demand is increasing, but a large amount of high-concentration organic wastewater is generated during the production of potato starch, which pollutes the environment. It is imperative to find an efficient and practical potato starch wastewater treatment process.

[0003] Different types of starch wastewater have their own characteristics. For potato starch wastewater, its water quality characteristics are as follows: (1) The quality and quantity of wastewater fluctuate greatly, which has a strong impact on the subsequent treatment system and can easily cause unstable system operation and substandard effluent;

[0004] (2) The wastewater has a high organic content, with a CODcr content of 25,000 to 30,000 mg / L, which is considered high-concentration organic wastewater;

[0005] (3) The total nitrogen content in the wastewater is high, with TN as high as 2000 mg / l or more, which is high nitrogen wastewater;

[0006] Potato starch wastewater has a high viscosity and produces a large amount of foam, which is creamy and very fine. It is difficult to achieve the purpose of defoaming by using a defoaming agent. The large amount of foam causes the wastewater treatment system to fail to operate normally. At the same time, this type of wastewater has a high organic matter and nitrogen content, and the subsequent treatment load is large. It is difficult to ensure that the effluent meets the direct discharge standard stably and the operating cost is high. Therefore, we have made improvements and proposed a potato starch wastewater treatment device. Utility Model Content

[0007] In view of the deficiencies in the prior art, the utility model provides a potato starch wastewater treatment device, which solves the problems mentioned in the background technology.

[0008] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0009] Potato starch wastewater treatment plant is used to solve the above problems.

[0010] The specific application is as follows:

[0011] It comprises a pretreatment deproteinization system, wherein a regulating tank is arranged on one side of the pretreatment deproteinization system, and a water distribution tank is arranged on one side of the regulating tank, and sewage pipes are fixedly connected between the pretreatment deproteinization system, the regulating tank and the water distribution tank, an anaerobic sedimentation tank is arranged on one side of the water distribution tank, and an A / O reaction tank, a secondary sedimentation tank and an external drainage tank are arranged on one side of the anaerobic sedimentation tank in sequence, and the A / O reaction tank, the secondary sedimentation tank and the external drainage tank are all connected through sewage pipes;

[0012] An anaerobic membrane bioreactor is connected between the water distribution tank and the anaerobic sedimentation tank via a sewage pipe, and an ammonia oxidation reactor is fixedly connected between the anaerobic sedimentation tank and the A / O reaction tank via a sewage pipe.

[0013] As a preferred technical solution of the present application, nutrients are provided on one side of the water distribution tank, and a dosing pipe is fixedly installed on the surface of one side of the water distribution tank, and the nutrients are added into the water distribution tank through the dosing pipe.

[0014] As a preferred technical solution of the present application, a first sludge pipe is fixedly connected between the anaerobic membrane bioreactor and the anaerobic sedimentation tank, and a first pump body is fixedly installed between the first sludge pipes.

[0015] As a preferred technical solution of the present application, a fan is provided on one side of the ammonia oxidation reactor, and gas pipelines are fixedly connected to the surfaces on both sides of the fan, and the other ends of the two gas pipelines are respectively connected to the ammonia oxidation reactor and the A / O reaction tank.

[0016] As a preferred technical solution of the present application, a sludge tank is provided on one side of the secondary sedimentation tank, and a second sludge pipe is fixedly installed between the sludge tank and the secondary sedimentation tank, and a second pump body is provided in the middle of the second sludge pipe, and a third sludge pipe is connected to one side of the ammonia oxidation reactor, and the other end of the third sludge pipe is connected to the second sludge pipe.

[0017] As a preferred technical solution of the present application, a screw stack sludge dewatering machine is provided on one side of the sludge tank, and the screw stack sludge dewatering machine is connected to the sludge tank through a sludge pipe, the screw stack sludge dewatering machine is connected to the A / O reaction tank through a sewage pipe, and a third pump body is fixedly installed in the middle of the sewage pipe between the screw stack sludge dewatering machine and the A / O reaction tank.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In the scheme of this application:

[0020] 1. By setting up a pretreatment deproteinization process, the protein can be coagulated and extracted, which can reduce the emission of organic matter by about 60%, greatly reducing the wastewater treatment load, and at the same time has certain economic benefits.

[0021] 2. By setting up a regulating tank, the quality and quantity of incoming water can be ensured to be uniform and stable; by setting up a water distribution tank, water quality parameters can be adjusted to lay a good foundation for subsequent anaerobic biochemical treatment.

[0022] 3. By setting up an anaerobic membrane bioreactor + anaerobic sedimentation tank, anaerobic microorganisms can be used to remove most of the organic matter and produce clean energy - biogas, while converting most of the organic nitrogen into inorganic nitrogen.

[0023] 4. By setting up an ammonia oxidation reaction tank + A / O tank + secondary sedimentation tank, biological methods are used to achieve complete denitrification, further purify the wastewater and achieve the purpose of carbon removal and denitrification.

[0024] 5. When adding nutrients, this device can be equipped with an automatic dosing system. The dosing system is equipped with an automatic feeding system, automatic drug dissolution, and automatic water replenishment, which can reduce operating errors and reduce personnel costs.

[0025] 6. In this device, online monitoring instruments for pH, temperature, flow, liquid level and other data can be set at each control node; the water quality and operation data of the inlet and outlet water can be mastered at all times to ensure the stable operation of the system and the compliance of the outlet water quality. This project system is equipped with a PLC control system to reduce the number of patrol personnel and facilitate operation management. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the overall process structure of the potato starch wastewater treatment device provided in this application;

[0027] Figure 2 Schematic diagram of the nutrient and dosing pipe structure of the potato starch wastewater treatment device provided in this application;

[0028] Figure 3 A schematic diagram of the connection structure between the first sludge pipeline and the first pump body of the potato starch wastewater treatment device provided in this application;

[0029] Figure 4 A schematic diagram of the connection structure between the fan and the gas pipeline of the potato starch wastewater treatment device provided in this application;

[0030] Figure 5 This is a schematic diagram of the structure of the sludge tank and screw sludge dewatering machine of the potato starch wastewater treatment device provided in this application.

[0031] Indicated in the figure:

[0032] 1. Pretreatment deproteinization system; 2. Regulating tank; 3. Water distribution tank; 31. Nutrients;

[0033] 32. Dosing pipe; 4. Anaerobic membrane bioreactor; 41. First sludge pipeline; 42. First pump body; 5. Anaerobic sedimentation tank; 6. Ammonia oxidation reactor; 61. Fan; 62. Gas pipeline; 7. A / O reaction tank; 8. Second sedimentation tank; 81. Second sludge pipeline; 82. Second pump body; 83. Third sludge pipeline; 9. External drainage tank; 10. Sludge tank; 11. Screw stack sludge dewatering machine; 111. Third pump body; 12. Sewage pipeline. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described examples are part of the embodiments of the utility model, not all of the embodiments.

[0035] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In order to solve the technical problems in the background technology, the following potato starch wastewater treatment device is provided:

[0040] Combination Figure 1-Figure 5As shown, a potato starch wastewater treatment device provided by the utility model includes a pretreatment deproteinization treatment system 1, which increases the temperature of wastewater under normal pressure to promote protein flocculation in the wastewater, and then removes the protein in the wastewater through solid-liquid separation, thereby realizing denitrification of the wastewater, a regulating tank 2 is arranged on one side of the pretreatment deproteinization treatment system 1, and a water distribution tank 3 is arranged on one side of the regulating tank 2, and a sewage pipe 12 is fixedly connected between the pretreatment deproteinization treatment system 1, the regulating tank 2 and the water distribution tank 3, an anaerobic sedimentation tank 5 is arranged on one side of the water distribution tank 3, and an A / O reaction tank 7, a secondary sedimentation tank 8 and an external drainage tank 9 are arranged in sequence on one side of the anaerobic sedimentation tank 5, and the A / O reaction tank 7, the secondary sedimentation tank 8 and the external drainage tank 9 are connected through sewage pipes. 12 are connected, and through the A / O reaction tank 7+secondary sedimentation tank 8, a biological method is used to achieve complete denitrification, further purify the wastewater and achieve the purpose of carbon removal and denitrification. An anaerobic membrane bioreactor 4 is connected between the water distribution tank 3 and the anaerobic sedimentation tank 5 through a sewage pipe 12, and an ammonia oxidation reactor 6 is fixedly connected between the anaerobic sedimentation tank 5 and the A / O reaction tank 7 through the sewage pipe 12. The combination of the anaerobic membrane bioreactor 4+ammonia oxidation reactor 6 has high treatment efficiency, greatly shortens the biochemical retention time of the wastewater, reduces the volume of infrastructure, and reduces the capital construction cost. The anaerobic membrane bioreactor 4+anaerobic sedimentation tank 5 uses anaerobic microorganisms to remove most of the organic matter and produce clean energy--biogas, and at the same time converts most of the organic nitrogen into inorganic nitrogen.

[0041] As a preferred embodiment, on the basis of the above-mentioned method, further, nutrients 31 are provided on one side of the water distribution tank 3, and a dosing pipe 32 is fixedly installed on the surface of one side of the water distribution tank 3. The nutrients 31 are added into the water distribution tank 3 through the dosing pipe 32 to adjust the alkalinity and nutrients 31 of the wastewater entering the anaerobic membrane bioreactor 4, thereby ensuring the stability of the wastewater and laying a foundation for the subsequent stable operation of the anaerobic membrane bioreactor 4.

[0042] As a preferred embodiment, on the basis of the above-mentioned method, further, a first sludge pipe 41 is fixedly connected between the anaerobic membrane bioreactor 4 and the anaerobic sedimentation tank 5, and a first pump body 42 is fixedly installed between the first sludge pipe 41, and the sludge precipitated in the anaerobic sedimentation tank 5 can be discharged into the anaerobic membrane bioreactor 4 through the first pump body 42, and the first desludging and reflux is performed to convert the organic matter in the wastewater into products such as biogas and other organic acids.

[0043] As a preferred embodiment, on the basis of the above-mentioned method, further, a fan 61 is provided on one side of the ammonia oxidation reactor 6, and gas pipelines 62 are fixedly connected to the surfaces on both sides of the fan 61, and the other ends of the two gas pipelines 62 are respectively connected to the ammonia oxidation reactor 6 and the A / O reaction tank 7. When the fan 61 works, air is discharged into the ammonia oxidation reactor 6 and the A / O reaction tank 7, which can provide oxygen to the ammonia oxidation reactor 6 and the A / O reaction tank 7, so that the bacteria inside can undergo oxidation reaction, and denitrification treatment is performed through the ammonia oxidation reactor 6.

[0044] As a preferred embodiment, on the basis of the above-mentioned method, further, a sludge tank 10 is provided on one side of the secondary sedimentation tank 8, and a second sludge pipe 81 is fixedly installed between the sludge tank 10 and the secondary sedimentation tank 8, and a second pump body 82 is provided in the middle of the second sludge pipe 81, a third sludge pipe 83 is connected to one side of the ammonia oxidation reactor 6, and the other end of the third sludge pipe 83 is connected to the second sludge pipe 81, the sludge precipitated in the secondary sedimentation tank 8 can be discharged through the second pump body 82, and after denitrification treatment in the ammonia oxidation reactor 6, the sludge can be discharged into the second sludge pipe 81 through the third sludge pipe 83, and discharged into the sludge tank 10 through the second pump body 82.

[0045] As a preferred embodiment, on the basis of the above-mentioned method, further, a screw stack sludge dewatering machine 11 is provided on one side of the sludge tank 10, and the screw stack sludge dewatering machine 11 is connected to the sludge tank 10 through a sludge pipe, the screw stack sludge dewatering machine 11 is connected to the A / O reaction tank 7 through a sewage pipe 12, and a third pump body 111 is fixedly installed in the middle of the sewage pipe 12 between the screw stack sludge dewatering machine 11 and the A / O reaction tank 7, the sludge inside the sludge tank 10 can be dehydrated by the screw stack sludge dewatering machine 11, and the wastewater in the sludge can be re-entered into the A / O reaction tank 7 through the third pump body 111 for a circulation treatment.

[0046] Specifically, the working principle of this solution is:

[0047] When in use, the workshop wastewater first enters the pretreatment deproteinization treatment system 1, which increases the wastewater temperature under normal pressure to promote protein flocculation in the wastewater, and then removes the protein in the wastewater through solid-liquid separation, thereby achieving denitrification of the wastewater.

[0048] After deproteinization, the wastewater flows by gravity into the regulating tank 2 for water quality and quantity adjustment. The regulating tank 2 is not equipped with a stirring device, and the wastewater is easy to foam, so a diagonal deflection method is adopted; the effluent from the regulating tank 2 flows by gravity into the distribution tank 3 to adjust the alkalinity and nutrients 31 of the wastewater entering the subsequent anaerobic membrane bioreactor 4, ensuring the stability of the wastewater and laying the foundation for the stable operation of the subsequent anaerobic membrane bioreactor 4. The wastewater enters from the bottom of the reactor through the water distribution system. Under the action of hydraulic stirring and gas production lifting, the wastewater is fully in contact with the anaerobic bacteria in the tank. Under the synergistic action of anaerobic microorganisms (mainly methanogens), most of the organic matter in the wastewater is degraded and a large amount of biomass energy - biogas is produced. At the same time, the organic nitrogen in the wastewater is converted into inorganic nitrogen. The effluent from the anaerobic membrane bioreactor 4 flows by gravity into the anaerobic sedimentation tank 5. Through mud and water separation, part of the sludge is returned to the anaerobic membrane bioreactor 4 to ensure the sludge concentration in the reactor.

[0049] The supernatant enters the aerobic treatment system; although most of the protein is recovered in the wastewater pretreatment, some protein will still remain in the water. After the wastewater is anaerobic, the protein is decomposed and converted into inorganic nitrogen, so the ammonia nitrogen index often rises in the effluent after anaerobic treatment. In view of the requirements of the wastewater for the ammonia nitrogen effluent index, the aerobic treatment process uses a high-efficiency denitrification reactor with decarbonization and nitrogen removal effects + A / O treatment process. This process makes full use of the combined effects of ammonia oxidation denitrification and nitrification / denitrification bacteria to degrade the organic pollution in the wastewater while converting the ammonia nitrogen in the wastewater into nitrate nitrogen and then finally into nitrogen gas, completely solving the problem of ammonia nitrogen in the wastewater meeting the discharge standards; the A / O effluent enters the secondary sedimentation tank 8 for mud and water separation, and part of the sludge is returned to ensure the microbial biomass in the tank, and the remaining sludge is discharged to the sludge tank 10. The supernatant is discharged to the discharge pool and meets the discharge standards.

[0050] The sludge produced by the process is discharged to the sludge pool 10 for temporary storage, and then dehydrated by the screw press sludge dewatering machine 11. The dehydrated dry sludge is regularly transported out for treatment. The filtrate produced by the screw press sludge dewatering machine 11 is collected and transferred to the A / O tank section A through the third pump body 111 for further treatment.

[0051] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0052] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A potato starch wastewater treatment device, comprising a pretreatment deproteinization treatment system (1), characterized in that: A regulating tank (2) is provided on one side of the pretreatment deproteinization system (1), and a water distribution tank (3) is provided on one side of the regulating tank (2), and a sewage pipe (12) is fixedly connected between the pretreatment deproteinization system (1), the regulating tank (2) and the water distribution tank (3), an anaerobic sedimentation tank (5) is provided on one side of the water distribution tank (3), and an A / O reaction tank (7), a secondary sedimentation tank (8) and an external drainage tank (9) are sequentially provided on one side of the anaerobic sedimentation tank (5), and the A / O reaction tank (7), the secondary sedimentation tank (8) and the external drainage tank (9) are connected through a sewage pipe (12); An anaerobic membrane bioreactor (4) is connected between the water distribution tank (3) and the anaerobic sedimentation tank (5) via a sewage pipe (12), and an ammonia oxidation reactor (6) is fixedly connected between the anaerobic sedimentation tank (5) and the A / O reaction tank (7) via a sewage pipe (12).

2. A potato starch wastewater treatment device according to claim 1, characterized in that: Nutrients (31) are provided on one side of the water distribution tank (3), and a dosing pipe (32) is fixedly installed on the surface of one side of the water distribution tank (3), and the nutrients (31) are added into the water distribution tank (3) through the dosing pipe (32).

3. A potato starch wastewater treatment device according to claim 1, characterized in that: A first sludge pipeline (41) is fixedly connected between the anaerobic membrane bioreactor (4) and the anaerobic sedimentation tank (5), and a first pump body (42) is fixedly installed between the first sludge pipeline (41).

4. A potato starch wastewater treatment device according to claim 1, characterized in that: A fan (61) is provided on one side of the ammonia oxidation reactor (6), and gas pipelines (62) are fixedly connected to the surfaces of both sides of the fan (61), and the other ends of the two gas pipelines (62) are respectively connected to the ammonia oxidation reactor (6) and the A / O reaction tank (7).

5. A potato starch wastewater treatment device according to claim 1, characterized in that: A sludge tank (10) is provided on one side of the secondary sedimentation tank (8), and a second sludge pipe (81) is fixedly installed between the sludge tank (10) and the secondary sedimentation tank (8), and a second pump body (82) is provided in the middle of the second sludge pipe (81); a third sludge pipe (83) is connected to one side of the ammonia oxidation reactor (6), and the other end of the third sludge pipe (83) is connected to the second sludge pipe (81).

6. A potato starch wastewater treatment device according to claim 5, characterized in that: A screw stack sludge dewatering machine (11) is provided on one side of the sludge pool (10), and the screw stack sludge dewatering machine (11) is connected to the sludge pool (10) via a sludge pipeline, and the screw stack sludge dewatering machine (11) is connected to the A / O reaction pool (7) via a sewage pipeline (12), and a third pump body (111) is fixedly installed in the middle of the sewage pipeline (12) between the screw stack sludge dewatering machine (11) and the A / O reaction pool (7).

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