Biochemical treatment device for organic cleaning wastewater

Abstract

The utility model discloses an organic cleaning wastewater biochemical treatment device, which is characterized by comprising a wastewater regulating tank, a hydrolysis acidification tank, a primary aerobic tank, an anoxic tank, a secondary aerobic tank, an MBR (membrane bioreactor) membrane tank and a clean water tank which are sequentially connected, aerobic tank fillers are arranged in the primary aerobic tank and the secondary aerobic tank, an MBR membrane component is arranged in the MBR membrane tank, and an anaerobic tank filler is arranged in the anaerobic tank. The utility model has the advantages that the hydrolysis acidification tank and the aerobic tank are arranged, organic pollutants in water are adsorbed by microorganisms in the aerobic tank to achieve the purpose of purifying water, and finally, the high filtration precision of a membrane is utilized to ensure that the effluent is clear and transparent, and high-quality produced water is obtained; as a whole, the device disclosed by the utility model has the capability of improving the removal capacity of total nitrogen and total phosphorus, and the effluent quality is superior to the first-grade A standard of Integrated Wastewater Discharge Standard (GB8978-1996).

Description

Technical Field

[0001] The utility model relates to the field of wastewater treatment, in particular to a biochemical treatment device for organic cleaning wastewater. Background Art

[0002] Traditional biological denitrification processes have high requirements for organic matter and are difficult to meet the denitrification requirements of low carbon-nitrogen ratio wastewater. The main route for biological denitrification of wastewater is the traditional nitrification and denitrification reaction, but its engineering application still has high energy consumption and is difficult to achieve low carbonization. In fact, its nitrogen and phosphorus removal capacity is not high. Utility Model Content

[0003] The purpose of the utility model is to solve the above technical problems and to provide an organic cleaning wastewater biochemical treatment device with high nitrogen and phosphorus removal efficiency, high removal capacity and good effluent quality.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A biochemical treatment device for organic cleaning wastewater comprises a wastewater regulating tank, a hydrolysis acidification tank, a primary aerobic tank, an anoxic tank, a secondary aerobic tank, an MBR membrane tank and a clear water tank which are connected in sequence. The primary aerobic tank and the secondary aerobic tank are provided with aerobic tank fillers, and the MBR membrane tank is provided with an MBR membrane assembly.

[0006] MBR is a membrane bioreactor.

[0007] In order to regulate the water level in time to avoid accidents such as overflow, a further preferred technical solution is that water level gauges are provided in the wastewater regulating tank and the clean water tank.

[0008] In order to be able to better pump water into the pool, a further preferred technical solution is that a wastewater lifting pump is provided between the wastewater regulating tank and the hydrolysis acidification tank, and a membrane suction pump is provided between the MBR membrane tank and the clear water tank.

[0009] In order to enable a better reaction, a further preferred technical solution is that a submersible mixer is provided in the hydrolysis acidification tank and the anoxic tank.

[0010] In order to provide oxygen to the aerobic tank and the MBR membrane tank, a further preferred technical solution is that the primary aerobic tank, the secondary aerobic tank and the MBR membrane tank are provided with aeration pipes, and the aeration pipes are connected to the output end of the fan through an air pipe.

[0011] In order to improve the denitrification capacity of microorganisms, a further preferred technical solution is that a digestate circulation pump is provided between the hydrolysis acidification tank and the anoxic tank.

[0012] In order to discharge the sludge, a further preferred technical solution is that the bottom of the primary aerobic tank and the MBR membrane tank are both provided with sewage outlets, the sewage outlets are both connected to sewage pipes, and the two sewage pipes are both connected to the sludge circulation pump, and the output end of the sludge circulation pump leads to the sludge tank.

[0013] In order to improve the sewage treatment effect, a further preferred technical solution is that the aerobic pool filler is composed of a series of filler components arranged, and the filler components are composed of an annular inner plate, an annular outer plate, connecting ribs and connecting fins. The annular inner plate and the annular outer plate are fixed into a porous disc-shaped body by connecting ribs and connecting fins, and the outer surface of the annular outer plate is provided with fins.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model achieves the purpose of purifying water quality by setting a hydrolysis acidification tank and an aerobic tank, and utilizing the microorganisms in the aerobic tank to adsorb organic pollutants in the water. The filler in the aerobic tank has a large specific surface area, which increases the amount of biofilm per unit volume, thereby increasing the amount of pollutants removed when the tank capacity is constant, and reducing the sludge load when the influent pollutant concentration is constant, thereby improving the sewage treatment effect. Finally, the high filtration accuracy of the membrane is utilized to ensure clear and transparent effluent, and obtain high-quality water production. Overall, the utility model has the ability to improve the removal of total nitrogen and total phosphorus, and the effluent quality is better than the Class A standard of the "Comprehensive Sewage Discharge Standard (GB8978-1996)". BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the aerobic pool filler of the utility model;

[0017] In the figure: 1. Wastewater regulating tank; 2. Hydrolysis acidification tank; 3. Primary aerobic tank; 4. Anoxic tank; 5. Secondary aerobic tank; 6. MBR membrane tank; 7. Clear water tank; 8. Aerobic tank filler; 9. MBR membrane assembly; 10. Water level gauge; 11. Wastewater lifting pump; 12. Membrane suction pump; 13. Submersible mixer; 14. Aeration pipe; 15. Fan; 16. Digestate circulation pump; 17. Sewage pipe; 18. Sludge circulation pump; 19. Annular outer plate; 20. Annular inner plate; 21. Connecting rib plate; 22. Connecting fin; 23. Fin. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Embodiment 1

[0020] like Figure 1-2 As shown, an organic cleaning wastewater biochemical treatment device includes a wastewater regulating tank 1, a hydrolysis acidification tank 2, a primary aerobic tank 3, an anoxic tank 4, a secondary aerobic tank 5, an MBR membrane tank 6 and a clear water tank 7 connected in sequence. The function of the hydrolysis acidification tank 2 is to convert the macromolecular organic difficult-to-degrade pollutants in the water into small molecular substances through the adsorption and decomposition of the hydrolysis acidification bacteria in the anaerobic hydrolysis acidification tank, reduce the COD concentration, and increase the B / C of the wastewater, that is, improve the biodegradability of the wastewater. Reduce the load of subsequent treatment to facilitate subsequent aerobic biochemical treatment. The functions of the primary aerobic tank 3 and the secondary aerobic tank 5 are to degrade or adsorb the carbon, ammonia nitrogen, and phosphorus organic pollutants in the water by the microorganisms, nitrifying bacteria, and phosphorus bacteria in the activated sludge that are massively multiplied in the aeration state, so as to achieve the purpose of purifying the water quality. Nitrifying bacteria convert ammonia nitrogen into nitrite and nitrate. The function of the anoxic tank 4 is to reduce the nitrate generated aerobically into nitrogen gas through denitrifying bacteria in anoxic state, thereby achieving the function of removing total nitrogen. The function of the MBR membrane tank is to use the membrane to filter the muddy sewage in the biochemical reaction tank to achieve mud and water separation. On the one hand, the membrane intercepts the microorganisms in the reaction tank, greatly increasing the concentration of activated sludge in the tank to a very high level, so that the biochemical reaction of degrading sewage proceeds more quickly and thoroughly. On the other hand, due to the high filtration accuracy of the membrane, the effluent is guaranteed to be clear and transparent, and high-quality water is obtained.

[0021] The first-stage aerobic pool 3 and the second-stage aerobic pool 5 are provided with aerobic pool fillers 8. Specifically, the aerobic pool fillers 8 are arranged in a series of filler components, and the filler components are composed of an annular inner plate 20, an annular outer plate 19, a connecting rib plate 21 and a connecting fin 22. The annular inner plate 20 and the annular outer plate 19 are fixed into a porous disc-shaped body by connecting the rib plate 21 and the connecting fin 22. The outer surface of the annular outer plate 19 is provided with fins 23. The solar radiation fins 23 provided on the outer surface of the annular outer plate 19 are used to expand the surface area, thereby increasing the surface hanging mold, thereby increasing the pollutant removal amount when the pool capacity is constant and reducing the sludge load when the influent pollutant concentration is constant, improving the sewage treatment effect; increasing the surface roughness, easy to hang the film and can be self-defilmed under hydraulic impact, removing the outer layer of aging biofilm, and preventing the biofilm from growing too thick. Specifically, the filler component has a simple structure and is radially symmetrical; there are 8 connecting rib plates 21; the annular outer plate has 16 fins. The suspended filler of this structure has high structural strength, stability and impact resistance. It is not easy to be deformed or damaged due to collision when used in sewage treatment, which increases the service life of the filler. In general, it has a large specific surface area and increases the amount of biofilm per unit volume, thereby increasing the amount of pollutants removed when the pool capacity is constant and reducing the sludge load when the influent pollutant concentration is constant, thereby improving the sewage treatment effect; a biological filler form that matches the different hydraulic environments generated by aeration and stirring is adopted; the internal gap of the filler is reasonable to avoid blockage; the structure is simple, the processing is convenient, and the price is low. An MBR membrane assembly is provided in the MBR membrane pool to filter muddy water. The MBR membrane assembly is a common technology and will not be elaborated here.

[0022] In order to be able to adjust the water level in time to avoid accidents such as overflow, a further preferred technical solution is that a water level meter 10 is provided in the wastewater regulating tank 1 and the clean water tank 7. The water level meter 10 can set upper and lower water level values ​​during the wastewater treatment process. When the water level exceeds the limit, the water level meter 10 will sound an alarm, and then conduct on-site regulation based on the alarm information data. In order to be able to better pump water into the pool, a further preferred technical solution is that a wastewater lifting pump 11 is provided between the wastewater regulating tank 1 and the hydrolysis acidification tank 2, and a membrane suction pump 12 is provided between the MBR membrane tank 6 and the clean water tank 7. In order to enable a better reaction, a further preferred technical solution is that a submersible mixer 13 is absolutely provided in the hydrolysis acidification tank 2 and the anoxic tank 4.

[0023] In order to provide oxygen to the aerobic pool and the MBR membrane pool, a further preferred technical solution is that an aeration pipe 14 is provided in the primary aerobic pool 3, the secondary aerobic pool 5 and the MBR membrane pool 6, and the aeration pipe 14 is connected to the output end of the fan 15 through an air pipe. In order to improve the denitrification capacity of microorganisms, a further preferred technical solution is that a digestion liquid circulation pump 16 is provided between the hydrolysis acidification pool 2 and the anoxic pool 4, and the digestion liquid circulation pump 16 can pump the wastewater at the bottom of the anoxic pool to the hydrolysis acidification pool for reprocessing, thereby improving the denitrification capacity of microorganisms and the removal rate of total nitrogen. Since the reflux liquid of the anoxic pool contains a large amount of sludge, it can definitely increase the concentration of microorganisms in the hydrolysis pool, so it plays a role in concentrating anoxic microorganisms. In order to discharge sludge, a further preferred technical solution is that a sewage outlet is provided at the bottom of the primary aerobic pool 3 and the MBR membrane pool 6, and the sewage outlet is connected to a sewage pipe 17, and the two sewage pipes 17 are connected to a sludge circulation pump 18, and the output end of the sludge circulation pump 18 leads to the sludge pool.

[0024] The working process of the utility model is as follows: after the organic cleaning wastewater flows into the wastewater regulating tank 1, the wastewater regulating tank 1 mainly functions to regulate the water volume and the sewage concentration, and then is lifted to the hydrolysis acidification tank 2 by the wastewater lifting pump 11, and under the stirring of the submerged mixer 13, the large-molecule organic difficult-to-degrade pollutants in the water are converted into small-molecule substances through the adsorption and decomposition of the hydrolysis acidification bacteria in the anaerobic hydrolysis acidification tank, thereby reducing the COD concentration and improving the biodegradability of the wastewater, and then enters the primary aerobic tank 3, and the activated sludge that has grown in large quantities in the aeration state is Microorganisms, nitrifying bacteria and phosphorus bacteria degrade or adsorb organic pollutants containing carbon, ammonia nitrogen and phosphorus in the water to purify the water quality. The water then enters the anoxic tank 4. In the anoxic state, the denitrifying bacteria reduce the nitrate generated aerobically into nitrogen gas, thereby removing the total nitrogen. The water then enters the secondary aerobic tank 5 to repeat the function of the primary aerobic tank 3 and then enters the MBR membrane tank 6. The membrane in the MBR membrane tank 6 is used to filter the muddy sewage in the biochemical reaction tank to separate mud and water. Finally, the water is pumped into the clean water tank by the membrane suction pump 12 for discharge.

[0025] The utility model achieves the purpose of purifying water quality by arranging a hydrolysis acidification tank and an aerobic tank, and utilizing the microorganisms in the aerobic tank to adsorb organic pollutants in the water. The filler in the aerobic tank has a large specific surface area, and the amount of biofilm per unit volume is increased, thereby increasing the amount of pollutants removed when the tank capacity is constant, and reducing the sludge load when the inlet pollutant concentration is constant, thereby improving the sewage treatment effect. Finally, the high filtering accuracy of the membrane is utilized to ensure clear and transparent effluent, and obtain high-quality water production. Overall, the utility model has the ability to improve the removal of total nitrogen and total phosphorus, and the effluent water quality is better than the Class A standard of the Comprehensive Sewage Discharge Standard (GB8978-1996).

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A biochemical treatment device for organic cleaning wastewater, characterized in that: It comprises a wastewater regulating tank, a hydrolysis acidification tank, a primary aerobic tank, an anoxic tank, a secondary aerobic tank, an MBR membrane tank and a clear water tank which are connected in sequence. The primary aerobic tank and the secondary aerobic tank are provided with aerobic tank fillers, and the MBR membrane tank is provided with an MBR membrane assembly.

2. The biochemical treatment device for organic cleaning wastewater according to claim 1, characterized in that: Water level gauges are provided in the wastewater regulating tank and the clean water tank.

3. The biochemical treatment device for organic cleaning wastewater according to claim 1, characterized in that: A wastewater lifting pump is provided between the wastewater regulating tank and the hydrolysis acidification tank, and a membrane suction pump is provided between the MBR membrane tank and the clear water tank.

4. The biochemical treatment device for organic cleaning wastewater according to claim 1, characterized in that: Submersible mixers are provided in the hydrolysis acidification tank and the anoxic tank.

5. The biochemical treatment device for organic cleaning wastewater according to claim 1, characterized in that: Aeration pipelines are arranged in the primary aerobic tank, the secondary aerobic tank and the MBR membrane tank, and the aeration pipelines are connected to the output end of the fan through an air delivery pipe.

6. The biochemical treatment device for organic cleaning wastewater according to claim 1, characterized in that: A digestate circulation pump is provided between the hydrolysis acidification tank and the anoxic tank.

7. The device for biochemical treatment of organic cleaning wastewater according to claim 1, characterized in that: The bottom of the primary aerobic tank and the MBR membrane tank are both provided with sewage outlets, and the sewage outlets are both connected with sewage pipes. The two sewage pipes are both connected with sludge circulation pumps, and the output end of the sludge circulation pump leads to the sludge tank.

8. The biochemical treatment device for organic cleaning wastewater according to claim 1, characterized in that: The aerobic pool filler is composed of a series of filler components, which are composed of an annular inner plate, an annular outer plate, connecting ribs and connecting fins. The annular inner plate and the annular outer plate are fixed into a porous disc-shaped body through connecting ribs and connecting fins, and the outer surface of the annular outer plate is provided with fins.

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