A domestic sewage treatment equipment in a highway service area with adjustable operation mode

Abstract

The utility model discloses a highway service area domestic sewage treatment equipment with adjustable operation mode, including an anaerobic tank, a first multifunctional tank, a second multifunctional tank, a third multifunctional tank and an MBR tank connected in sequence, and a second aeration pipe, a third aeration pipe and a fourth aeration pipe are arranged in sequence at the bottom of the tanks, the air inlet ends of the aeration pipes are connected to a first fan through an air inlet pipe, and a second valve, a third valve and a fourth valve are arranged in sequence on the air inlet pipes of the first multifunctional tank, the second multifunctional tank and the third multifunctional tank. The treatment equipment of the utility model has the advantages of low energy consumption, low operation and maintenance cost, long service life, and adjustable operation mode. When used to treat domestic sewage in highway service areas, it can not only automatically and timely adjust the operation mode according to the changes in water quality and water volume, but also ensure that the effluent water quality is stable and up to standard, and at the same time, it can significantly reduce the operation cost, with high use value and good application prospects.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment, and relates to domestic sewage treatment equipment in a highway service area with adjustable operation mode. Background Art

[0002] Aiming at the problems that the domestic sewage in highway service areas is widely and dispersedly discharged, cannot be treated in a large-scale centralized manner, and the existing conventional equipment is difficult to achieve the effluent water quality indicators to meet the discharge standards, an intelligent integrated treatment equipment for domestic sewage in highway service areas is proposed, which includes an anaerobic tank, an anoxic tank and an aerobic tank. The front upper part of the anaerobic tank is provided with a water inlet, and the tail end of the anaerobic tank is separated by a partition with an anoxic tank, an aerobic tank and an MBR tank in sequence. 2 The MBR reaction process was added at the end of the / O process, which greatly improved the sewage treatment effect. After treatment, the effluent quality of the highway service area meets the Class A standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002). In addition, the domestic sewage in the highway service area also has the characteristics of large fluctuations in water quality and water volume with the seasons. For example, the total nitrogen, ammonia nitrogen and total phosphorus values ​​in the domestic sewage in the highway service area are generally about 2 times that of ordinary domestic sewage, and the total nitrogen, ammonia nitrogen and total phosphorus values ​​in the sewage in the busy highway service area are even 2-4 times that of ordinary domestic sewage. At the same time, COD cr , animal and vegetable oils and petroleum are also higher than ordinary domestic sewage; for example, the water treatment volume of highway service areas is generally 50-200m 3 / d, mainly domestic sewage generated by the activities of drivers and passengers entering the service area. Due to the large randomness of vehicles entering the service area, the amount of sewage in the same service area at different times also has great fluctuations, especially during holidays. The number of vehicles entering the service area is generally 2 times or more of the daily average, resulting in a corresponding increase in the amount of sewage generated in the service area. Generally speaking, the amount of sewage in the same service area in summer is higher than that in winter. However, the domestic sewage in highway service areas still has the characteristics of large seasonal fluctuations in water quality and water volume. The above-mentioned intelligent integrated treatment equipment cannot adjust the operation mode according to the fluctuations in water quality and water volume in highway service areas. On the one hand, it is easy to cause the effluent water quality to be unable to meet the standard stably; on the other hand, when the water quality is low and the water volume is small, the effluent can only be discharged through the MBR membrane. A considerable part of the energy consumption is generated by the MBR membrane suction and aeration, resulting in high energy consumption. At the same time, it is also easy to cause MBR membrane pollution, increase the operation and maintenance cost of the MBR membrane system and reduce the service life of the MBR membrane. Therefore, obtaining a highway service area domestic sewage treatment equipment with low energy consumption, low operation and maintenance costs, long service life and adjustable operation mode is of great significance for ensuring that the effluent water quality is stable and meets the standards. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a highway service area domestic sewage treatment equipment with low energy consumption, low operation and maintenance cost, long service life and adjustable operation mode.

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

[0005] A domestic sewage treatment equipment for a highway service area with adjustable operation mode, comprising an anaerobic tank, a first multifunctional tank, a second multifunctional tank, a third multifunctional tank and an MBR tank connected in sequence;

[0006] The bottoms of the anaerobic pool, the first multifunctional pool, the second multifunctional pool, and the third multifunctional pool are provided with a first aeration pipe, a second aeration pipe, a third aeration pipe, and a fourth aeration pipe in sequence; the air inlet ends of the first aeration pipe, the second aeration pipe, the third aeration pipe, and the fourth aeration pipe are all connected to a first fan through an air inlet pipe;

[0007] A first valve is provided on the air intake pipe between the first aeration pipe and the first fan; a second valve is provided on the air intake pipe between the second aeration pipe and the first fan; a third valve is provided on the air intake pipe between the third aeration pipe and the first fan; a fourth valve is provided on the air intake pipe between the fourth aeration pipe and the first fan;

[0008] The bottom of the first multi-functional pool is connected to the bottom of the second multi-functional pool through a first bypass pipe; a second bypass pipe is also provided between the second multi-functional pool and the third multi-functional pool; the second bypass pipe is arranged below the water outlet of the second multi-functional pool and is not lower than the minimum liquid level of the second multi-functional pool during normal operation; a sixth valve is provided on the second bypass pipe.

[0009] As a further improvement of the above technical solution: a fifth valve is provided on the first bypass pipe.

[0010] As a further improvement of the above technical solution: a stirring device is also provided in the first multifunctional pool; the stirring device is located at the bottom of the first multifunctional pool.

[0011] As a further improvement of the above technical solution: the third multifunctional pool is also provided with an override pipe; the override pipe is arranged below the water outlet of the third multifunctional pool.

[0012] As a further improvement of the above technical solution: a seventh valve is provided on the override pipe.

[0013] As a further improvement of the above technical solution: a first submersible sewage pump is also provided in the third multifunctional pool; the first submersible sewage pump is located at the bottom of the third multifunctional pool; the first submersible sewage pump is connected to the anaerobic pool through a first return pipe.

[0014] As a further improvement of the above technical solution: a DO meter is also provided on the second multifunctional pool.

[0015] As a further improvement of the above technical solution: an MBR membrane is provided in the MBR pool; the MBR membrane is located in the middle of the MBR pool; the bottom of the MBR membrane is connected to a second fan through a pipeline;

[0016] As a further improvement of the above technical solution: a second submersible sewage pump is further provided in the MBR pool; the second submersible sewage pump is located at the bottom of the MBR pool; the second submersible sewage pump is connected to the anaerobic tank through a second return pipe.

[0017] As a further improvement of the above technical solution: the water outlet of the MBR pool is also connected to a filter.

[0018] As a further improvement of the above technical solution: a pH meter is also provided on the anaerobic tank.

[0019] As a further improvement of the above technical solution: the anaerobic tank, the first multifunctional tank, the second multifunctional tank, the third multifunctional tank and the MBR tank are installed in the same box.

[0020] As a further improvement of the above technical solution: when in use, the first multifunctional pool is an anoxic pool or an anaerobic pool, the second multifunctional pool is an aerobic pool or an SBR pool, and the third multifunctional pool is an aerobic pool or a sedimentation tank.

[0021] As a further improvement of the above technical solution: it also includes a grille pool, a grease trap and a regulating pool which are connected in sequence; the grille pool, the grease trap and the regulating pool are located outside the box; a grille is also provided in the grille pool; the grease trap is a three-stage grease trap; the water outlet of the regulating pool is connected to the water inlet of the anaerobic pool; and a liquid level meter is also provided on the regulating pool.

[0022] Compared with the prior art, the advantages of the utility model are:

[0023] In view of the shortcomings of existing equipment such as difficulty in adapting to the quality of domestic sewage on highways, large fluctuations in water volume, and the resulting high energy consumption and difficulty in stabilizing the quality of effluent to meet standards, the utility model creatively proposes a domestic sewage treatment equipment for a highway service area with an adjustable operation mode, including an anaerobic tank, a first multifunctional tank, a second multifunctional tank, a third multifunctional tank and an MBR tank connected in sequence, wherein a second aeration pipe, a third aeration pipe and a fourth aeration pipe are arranged at the bottom of the first multifunctional tank, the second multifunctional tank and the third multifunctional tank, and the air inlet ends of the second aeration pipe, the third aeration pipe and the fourth aeration pipe are connected to a first fan through an air inlet pipe, and a first fan is arranged at the bottom of the first multifunctional tank. The second valve, the third valve and the fourth valve are arranged on the air inlet pipes of the first, second and third multi-functional pools in sequence. By aerating the first multi-functional pool by using the first fan and the second aeration pipe, and adjusting the aeration amount of the second aeration pipe by controlling the second valve, the function of the first multi-functional pool as an anoxic pool and an anaerobic pool can be switched. By aerating the second multi-functional pool by using the first fan and the third aeration pipe, and adjusting the aeration amount of the third aeration pipe by controlling the third valve, the function of the second multi-functional pool as an aerobic pool and an SBR pool can be switched. By aerating the third multi-functional pool by using the first fan and the fourth aeration pipe, and adjusting the aeration amount of the third aeration pipe by controlling the third valve, the function of the second multi-functional pool as an aerobic pool and an SBR pool can be switched. The four valves adjust the aeration volume of the fourth aeration pipe, and the third multifunctional pool can be switched between the aerobic pool and the sedimentation pool. Therefore, under the joint regulation of the second valve, the third valve and the fourth valve, the aeration volumes of the second aeration pipe, the third aeration pipe and the fourth aeration pipe can be adjusted in time, and then the sewage treatment methods of the first multifunctional pool, the second multifunctional pool and the third multifunctional pool can be adjusted in time, and finally the equipment of the utility model can run a variety of combined processes and various combined processes can be switched in time. Furthermore, under the joint action of the anaerobic pool, the first multifunctional pool, the second multifunctional pool, the third multifunctional pool and the MBR pool, it can not only ensure that the biochemical pool always maintains a relatively high level of High sludge concentration can extend the sludge age, occupy a small area, and can better achieve denitrification. At the same time, it can ensure that the effluent water quality meets the Level A standard of the "Pollutant Discharge Standard for Urban Wastewater Treatment Plants" (GB18918-2002). In particular, when the water quality is low or the water volume is small, by timely adjusting the combined process, the sewage can meet the standard after being treated by the anaerobic tank, the first multi-functional tank, the second multi-functional tank, and the third multi-functional tank. At this time, the sewage does not pass through the MBR tank and can be discharged directly, or the working time of the MBR tank can be significantly reduced. While achieving energy saving, it can also extend the service life of the MBR membrane, which is beneficial to reduce operating costs.The treatment equipment of the utility model has the advantages of low energy consumption, low operation and maintenance cost, long service life and adjustable operation mode. When used for treating domestic sewage in highway service areas, it can not only automatically and timely adjust the operation mode according to the changes in water quality and water volume in the highway service areas, but also ensure that the effluent water quality is stable and meets the standards. At the same time, it can also significantly reduce operating costs, has high use value and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0025] Figure 1 This is a schematic diagram of a domestic sewage treatment device in a highway service area with an adjustable operating mode according to the utility model.

[0026] Figure 2 This is a flow chart corresponding to the first operation mode of the equipment of the utility model.

[0027] Figure 3 This is a flow chart corresponding to the second operation mode of the equipment of the utility model.

[0028] Figure 4 This is a flow chart corresponding to the third operation mode of the equipment of the utility model.

[0029] Figure 5 It is a flow chart corresponding to the four operating modes of the equipment of the utility model.

[0030] Legend:

[0031] 1. Grid pool; 11. Grid; 2. Grease trap; 3. Regulating pool; 31. Liquid level gauge; 4. Anaerobic pool; 41. First aeration pipe; 42. First valve; 43. pH meter; 5. First multifunctional pool; 51. Second aeration pipe; 52. Second valve; 53. Stirring device; 54. First bypass pipe; 55. Fifth valve; 6. Second multifunctional pool; 61. Third aeration pipe; 62. Third valve; 63. DO meter; 64. Sixth valve; 7. Third multifunctional pool; 71. Fourth aeration pipe; 72. Fourth valve; 73. Seventh valve; 74. First submersible sewage pump; 75. First return pipe; 8. MBR pool; 81. MBR membrane; 82. Second submersible sewage pump; 83. Second return pipe; 84. Filter; 91. First fan; 92. Second fan. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0033] In the following examples of the present invention, unless otherwise specified, the materials and instruments used are commercially available, the equipment used is conventional equipment, and the data obtained are the average values ​​of more than three repeated experiments.

[0034] Example

[0035] like Figure 1 As shown, the domestic sewage treatment equipment in the highway service area with adjustable operation mode of this embodiment includes an anaerobic tank 4, a first multifunctional tank 5, a second multifunctional tank 6, a third multifunctional tank 7 and an MBR tank 8 which are connected in sequence; a first aeration pipe 41, a second aeration pipe 51, a third aeration pipe 61 and a fourth aeration pipe 71 are arranged in sequence at the bottom of the anaerobic tank 4, the first multifunctional tank 5, the second multifunctional tank 6 and the third multifunctional tank 7; the air inlet ends of the first aeration pipe 41, the second aeration pipe 51, the third aeration pipe 61 and the fourth aeration pipe 71 are connected to the first fan 91 through the air inlet pipe; a first valve 42 is arranged on the air inlet pipe between the first aeration pipe 41 and the first fan 91; a second valve 52 is arranged on the air inlet pipe between the second aeration pipe 51 and the first fan 91; a third valve 62 is arranged on the air inlet pipe between the third aeration pipe 61 and the first fan 91; a fourth valve 72 is arranged on the air inlet pipe between the fourth aeration pipe 71 and the first fan 91.

[0036] In this embodiment, a second aeration pipe 51, a third aeration pipe 61, and a fourth aeration pipe 71 are arranged at the bottom of the first multifunctional pool 5, the second multifunctional pool 6, and the third multifunctional pool 7, and the air inlet ends of the second aeration pipe 51, the third aeration pipe 61, and the fourth aeration pipe 71 are connected to the first fan 91 through an air inlet pipe, and a second valve 52, a third valve 62, and a fourth valve 72 are arranged on the air inlet pipes of the first multifunctional pool 5, the second multifunctional pool 6, and the third multifunctional pool 7 in sequence, and the first multifunctional pool 5 is aerated by using the first fan 91 and the second aeration pipe 51, and the second aeration pipe 52 is controlled to adjust the air flow of the second aeration pipe 51. The aeration volume of the air pipe 51 can realize the switching of the first multifunctional pool 5 as an anoxic pool and an anoxic pool. By using the first fan 91 and the third aeration pipe 61 to aerate the second multifunctional pool 6, and by controlling the third valve 62 to adjust the aeration volume of the third aeration pipe 61, the switching of the second multifunctional pool 6 as an aerobic pool and an SBR pool can be realized. By using the first fan 91 and the fourth aeration pipe 71 to aerate the third multifunctional pool 7, and by controlling the fourth valve 72 to adjust the aeration volume of the fourth aeration pipe 71, the switching of the third multifunctional pool 7 as an aerobic pool and a sedimentation pool can be realized. 2. Under the joint regulation of the third valve 62 and the fourth valve 72, the aeration amount of the second aeration pipe 51, the third aeration pipe 61 and the fourth aeration pipe 71 can be adjusted in time, and then the treatment method of the first multifunctional pool 5, the second multifunctional pool 6 and the third multifunctional pool 7 for sewage can be adjusted in time, and finally the equipment of the utility model can run a variety of combined processes and various combined processes can be switched in time. Furthermore, under the joint action of the anaerobic pool 4, the first multifunctional pool 5, the second multifunctional pool 6, the third multifunctional pool 7 and the MBR pool 8, it can not only ensure that the biochemical pool always maintains a high sludge concentration, but also prolong the sludge age, accounting for The small land area can better achieve denitrification, and at the same time ensure that the effluent water quality meets the Class A standard of the "Pollutant Discharge Standard for Urban Wastewater Treatment Plants" (GB18918-2002). In particular, when the water quality is low or the water volume is small, by timely adjusting the combined process, the sewage can be treated by the anaerobic tank 4, the first multifunctional tank 5, the second multifunctional tank 6, and the third multifunctional tank 7 to meet the standard. At this time, the sewage does not pass through the MBR tank 8 and can be directly discharged, or the working time of the MBR tank 8 can be significantly reduced. While achieving energy saving, it can also extend the service life of the MBR membrane, which is conducive to reducing operating costs. The treatment equipment of the utility model has the advantages of low energy consumption, low operation and maintenance costs, long service life, and adjustable operation mode. When used to treat domestic sewage in highway service areas, it can not only automatically and timely adjust the operation mode according to the changes in water quality and water volume in the highway service area, but also ensure that the effluent water quality is stable and meets the standard. At the same time, it can also significantly reduce operating costs, with high use value and good application prospects.

[0037] In this embodiment, the bottom of the first multifunctional pool 5 is connected to the bottom of the second multifunctional pool 6 through a first bypass pipe 54; a fifth valve 55 is provided on the first bypass pipe 54. In the utility model, through the joint action of the first bypass pipe 54 and the fifth valve 55, an appropriate amount of activated sludge from the second multifunctional pool 6 can be supplemented into the first multifunctional pool 5, which helps to ensure that the first multifunctional pool 5 always maintains a high sludge concentration, can prolong the sludge age, and can also ensure that a variety of microorganisms (such as aerobic bacteria, facultative bacteria, anaerobic bacteria) exist in the first multifunctional pool 5, which is ultimately conducive to improving the denitrification effect of the first multifunctional pool 5 when it is used as an anoxic pool or an anoxic pool.

[0038] In this embodiment, a stirring device 53 is further provided in the first multifunctional pool 5, specifically a submersible mixer, and the stirring device 53 is located at the bottom of the first multifunctional pool 5. In the present invention, the stirring device 53 is provided to help improve the mixing effect of the activated sludge and the sewage, thereby facilitating the denitrification effect of the first multifunctional pool 5 when used as an anoxic pool or an anoxic pool.

[0039] In this embodiment, a second bypass pipe (not shown in the figure) is further provided between the second multifunctional pool 6 and the third multifunctional pool 7; the second bypass pipe is provided below the outlet of the second multifunctional pool 6 and is not lower than the lowest liquid level of the second multifunctional pool 6 during normal operation; and a sixth valve 64 is provided on the second bypass pipe. In the utility model, the second bypass pipe is provided below the outlet of the second multifunctional pool 6, which is conducive to realizing the switching of the second multifunctional pool 6 in multi-functions, and is conducive to realizing the switching of the third multifunctional pool 7 in the function of a sedimentation tank. At this time, the intermittent water inlet mode can meet the requirements of sewage water quality and water volume being lower than the design value on the one hand, and on the other hand, the supernatant treated by the second multifunctional pool 6 is discharged into the third multifunctional pool 7 for sedimentation treatment. After mud and water separation, the various indicators of the effluent can meet the discharge requirements and can be directly discharged. When the various indicators of the effluent do not meet the discharge requirements, the effluent is continuously input into the MBR pool for membrane biological treatment, which can achieve the standard treatment of sewage in a relatively short time, which is not only conducive to significantly reducing the working time of the MBR pool, but also conducive to reducing energy consumption and extending the service life of the MBR membrane.

[0040] In the present embodiment, under the joint action of the first bypass pipe and the second bypass pipe, on the one hand, it is more conducive to realizing the multifunctional adjustment of the first multifunctional pool, the second multifunctional pool and the third multifunctional pool, so that the equipment can quickly run different combination processes, so that the equipment can promptly respond to the process adjustments required for different water quality and water quantity changes; on the other hand, it is also more conducive to enhancing the functional effects of the first multifunctional pool, the second multifunctional pool and the third multifunctional pool, so that the overall treatment effect of the equipment on sewage with different water quality and water quantity is significantly improved, so that the equipment can quickly achieve standard treatment of sewage with different water quality and water quantity, and finally ensure that the equipment of the utility model can quickly adapt to changes in water quality and water quantity, and can promote the standard treatment of sewage with different water quality and water quantity under lower cost conditions.

[0041] In this embodiment, the third multifunctional pool 7 is also provided with an overriding pipe; the overriding pipe is arranged below the water outlet of the third multifunctional pool 7; and a seventh valve 73 is arranged on the overriding pipe. In the present utility model, an overriding pipe is arranged below the water outlet of the third multifunctional pool 7, so that the water in the third multifunctional pool 7 that meets the requirements can be discharged to the outside.

[0042] In this embodiment, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve and the seventh valve are all electric valves.

[0043] In this embodiment, a first submersible sewage pump 74 is further provided in the third multifunctional pool 7; the first submersible sewage pump 74 is located at the bottom of the third multifunctional pool 7; the first submersible sewage pump 74 is connected to the anaerobic pool 4 through a first return pipe 75. In the utility model, the first submersible sewage pump 74 is provided at the bottom of the third multifunctional pool 7, and the digestion liquid of the third multifunctional pool 7 can be used as a carbon source substrate and returned to the anaerobic pool 4 through the first return pipe 75, which is conducive to maintaining a suitable C / N ratio in the anaerobic pool at all times, thereby ensuring that the anaerobic pool can effectively degrade organic pollutants in sewage.

[0044] In this embodiment, a DO meter 63 is also provided on the second multifunctional pool 6. The DO meter 63 detects and displays the dissolved oxygen concentration of the second multifunctional pool 6 during operation in real time, which is beneficial to adjust the aeration volume through the frequency conversion of the first fan 91 to ensure the stable operation of the biochemical system.

[0045] In this embodiment, an MBR membrane 81 is provided in the MBR pool 8. The MBR membrane 81 is located in the middle of the MBR pool 8. The bottom of the MBR membrane 81 is connected to a second fan 92 through a pipeline.

[0046] In this embodiment, the first fan 91 and the second fan 92 are both variable frequency fans.

[0047] In this embodiment, a second submersible sewage pump 82 is further provided in the MBR pool 8; the second submersible sewage pump 82 is located at the bottom of the MBR pool 8; the second submersible sewage pump 82 is connected to the anaerobic pool 4 through a second return pipe 83. In the utility model, the second submersible sewage pump 82 is provided at the bottom of the MBR pool 8, and the activated sludge in the MBR pool can be used as a carbon source substrate and returned to the anaerobic pool 4 through the second return pipe 83, which is conducive to maintaining a suitable C / N ratio in the anaerobic pool, thereby ensuring that the anaerobic pool can effectively degrade organic pollutants in sewage.

[0048] In this embodiment, the water outlet of the MBR pool 8 is further connected to a filter 84. Specifically, the filter 84 is a filter with a self-cleaning function.

[0049] In this embodiment, a pH meter 43 is further provided on the anaerobic tank 4. The pH meter 43 detects and displays the pH of the anaerobic tank in real time during operation, so that drugs can be added in time and the alkalinity required by the biochemical system can be adjusted.

[0050] In this embodiment, the anaerobic tank 4, the first multifunctional tank 5, the second multifunctional tank 6, the third multifunctional tank 7 and the MBR tank 8 are installed in the same box, which is convenient for installation, saves land and has lower use cost.

[0051] In this embodiment, when in use, the first multifunctional pool 5 is an anoxic pool or an anaerobic pool, the second multifunctional pool 6 is an aerobic pool or an SBR pool, and the third multifunctional pool 7 is an aerobic pool or a sedimentation pool.

[0052] In this embodiment, the grille pool 1, the grease trap 2 and the regulating pool 3 which are connected in sequence are also included, and the grille pool 1, the grease trap 2 and the regulating pool 3 are located outside the box.

[0053] In this embodiment, a grid 11 is further provided in the grid pool 1 .

[0054] In this embodiment, the grease trap 2 is a three-stage grease trap.

[0055] In this embodiment, the water outlet of the regulating tank 3 is connected to the water inlet of the anaerobic tank 4 , and a liquid level meter 31 is also provided on the regulating tank 3 .

[0056] In this embodiment, when the above-mentioned equipment is used to treat domestic sewage in a highway service area, the following modes are selected to treat the sewage according to the changes in water quality and water volume, as follows:

[0057] First, when the service area is in a busy period, the water quality is generally close to the design value, and the water volume is ≥ 80% of the design water volume. Mode 1 operation is adopted, such as Figure 2As shown, the operation mode of AO+MBR process is adopted. At this time, the sixth valve is closed, and the first valve, the second valve, the third valve, the fourth valve, the fifth valve, and the seventh valve are opened. The main function of the first multifunctional pool is an oxygen pool, and the second multifunctional pool and the third multifunctional pool are both aerobic pools. Specifically:

[0058] First, the domestic sewage from the highway service area is input into the screen pool, and after the screen treatment, the coarse suspended solids are removed; the sewage treated by the screen is input into the grease trap to remove the floating oil; after the floating oil is removed in the grease trap, the sewage is input into the regulating tank to adjust the sewage water quality to meet the inlet water quality requirements of the anaerobic tank; after the water quality and water quantity are balanced in the regulating tank, it enters the anaerobic tank, the first multi-functional tank, the second multi-functional tank, the third multi-functional tank and the MBR tank in turn for treatment.

[0059] During the operation of the anaerobic tank, when the pH value is lower than 6, soda ash can be added to the anaerobic tank to adjust the alkalinity consumed by the nitrification reaction.

[0060] During the operation of the anaerobic tank, the first multifunctional tank, the second multifunctional tank and the third multifunctional tank, the first fan is turned on, and under the action of the electric valve that can automatically adjust the flow rate, the aeration volume is switched and adjusted arbitrarily according to the operation needs, so that the dissolved oxygen in the anaerobic tank is controlled to be ≤0.2mg / L, the dissolved oxygen in the first multifunctional tank is controlled to be 0.5-1.0mg / L, and the dissolved oxygen in the second and third multifunctional tanks is controlled to be 1.5-2.0mg / L.

[0061] During the operation of the MBR pool, the second fan is turned on, and under the action of the electric valve that can automatically adjust the flow, the aeration volume can be switched and adjusted at will according to the operation needs to completely degrade the ammonia nitrogen and COD in the MBR pool. cr And other substances, so that the effluent water quality can meet the discharge standards, specifically to ensure that the effluent meets the "Urban Wastewater Treatment Plant Pollutant Discharge Standard" (GB18918-2002) Level A standard.

[0062] Second, when the service area is in busy hours, the water quality is generally close to the design value, and the water volume is 1 / 2-4 / 5 of the design water volume. Mode 2 is used. Figure 3 As shown, using A 2 The operation mode of the O+MBR process, at this time, close the second valve, the fifth valve, the sixth valve, the seventh valve, open the first valve, the third valve, the fourth valve, the first multi-functional pool is anoxic pool, the second multi-functional pool and the third multi-functional pool are aerobic pools, specifically:

[0063] First, the domestic sewage from the highway service area is input into the screen pool, and after the screen treatment, the coarse suspended solids are removed; the sewage treated by the screen is input into the grease trap to remove the floating oil; after the floating oil is removed in the grease trap, the sewage is input into the regulating tank to adjust the sewage water quality to meet the inlet water quality requirements of the anaerobic tank; after the water quality and water quantity are balanced in the regulating tank, it enters the anaerobic tank, the first multi-functional tank, the second multi-functional tank, the third multi-functional tank and the MBR tank in turn for treatment.

[0064] During the operation of the anaerobic tank, when the pH value is lower than 6, soda ash can be added to the anaerobic tank to adjust the alkalinity consumed by the nitrification reaction.

[0065] During the operation of the anaerobic tank, the first multifunctional tank, the second multifunctional tank and the third multifunctional tank, the first fan is turned on, and under the action of the electric valve that can automatically adjust the flow rate, the aeration volume is switched and adjusted arbitrarily according to the operation needs, so that the dissolved oxygen in the anaerobic tank is controlled to be ≤0.2mg / L, the dissolved oxygen in the first multifunctional tank is controlled to be ≤0.5mg / L, and the dissolved oxygen in the second and third multifunctional tanks is controlled to be 1.5-2.0mg / L.

[0066] During the operation of the MBR pool, the second fan is turned on, and under the action of the electric valve that can automatically adjust the flow, the aeration volume can be switched and adjusted at will according to the operation needs to completely degrade the ammonia nitrogen and COD in the MBR pool. cr And other substances, so that the effluent water quality can meet the discharge standards, specifically to ensure that the effluent meets the "Urban Wastewater Treatment Plant Pollutant Discharge Standard" (GB18918-2002) Level A standard.

[0067] Third, when the service area is in non-busy hours, the water quality and water volume are usually lower than the design value, and the water volume is 1 / 2-4 / 5 of the design water volume. Mode 3 operation is adopted, such as Figure 4 As shown, at this time, the second valve, the fourth valve, and the fifth valve are closed, and the first valve and the third valve are opened. The first multifunctional pool is an anoxic pool, the second multifunctional pool is an SBR pool, and the third multifunctional pool is a sedimentation pool. Specifically:

[0068] First, the domestic sewage from the highway service area is input into the screen pool, and after the screen treatment, the coarse suspended solids are removed; the sewage treated by the screen is input into the grease trap to remove the floating oil; after the floating oil is removed in the grease trap, the sewage is input into the regulating tank to adjust the sewage water quality to meet the inlet water quality requirements of the anaerobic tank; after the water quality and water quantity are balanced in the regulating tank, it enters the anaerobic tank, the first multi-functional tank, the second multi-functional tank, the third multi-functional tank and the MBR tank in turn for treatment.

[0069] During the operation of the anaerobic tank, when the pH value is lower than 6, soda ash can be added to the anaerobic tank to adjust the alkalinity consumed by the nitrification reaction.

[0070] During the operation of the anaerobic tank, the first multifunctional tank, the second multifunctional tank and the third multifunctional tank, the first fan is turned on, and under the action of the electric valve that can automatically adjust the flow rate, the aeration volume is switched and adjusted arbitrarily according to the operation needs, so that the dissolved oxygen in the anaerobic tank is controlled to be ≤0.2mg / L, the dissolved oxygen in the first multifunctional tank is controlled to be ≤0.5mg / L, and the dissolved oxygen in the second multifunctional tank is controlled to be 1.5-2.0mg / L. In addition, an intermittent treatment method is adopted in the second multifunctional tank (SBR tank), wherein aeration is performed for 3h, sedimentation is performed for 50min, and then the sixth valve is opened for drainage, and the supernatant in the second multifunctional tank is discharged into the third multifunctional tank (sedimentation tank). The drainage time is 30min. After the drainage is completed, the next cycle is entered.

[0071] During the operation of the MBR pool, after the sewage in the third multifunctional pool (sedimentation pool) is input into the MBR pool, the second fan is turned on, and under the action of the electric valve that can automatically adjust the flow, the aeration volume is switched and adjusted at will according to the operation needs to completely degrade the ammonia nitrogen and COD in the MBR pool. cr And other substances, so that the effluent water quality can meet the discharge standards, specifically to ensure that the effluent meets the "Urban Wastewater Treatment Plant Pollutant Discharge Standard" (GB18918-2002) Level A standard.

[0072] Fourth, when the effluent water quality index meets the discharge requirements after treatment in the anaerobic tank, the first multifunctional tank, the second multifunctional tank and the third multifunctional tank in mode 3, mode 4 can be operated, such as Figure 5 As shown, specifically: open the seventh valve and discharge the water that meets the standards directly.

[0073] From the above results, it can be seen that the treatment equipment of the utility model has the advantages of low energy consumption, low operation and maintenance cost, long service life, adjustable operation mode, etc. When used to treat domestic sewage in highway service areas, it can not only automatically and timely adjust the operation mode according to the changes in water quality and water volume in the highway service areas, but also ensure that the effluent water quality is stable and meets the standards. At the same time, it can also significantly reduce operating costs, with high use value and good application prospects.

[0074] The above embodiments are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A highway service area domestic sewage treatment equipment with adjustable operation mode, characterized in that: It comprises an anaerobic pool (4), a first multifunctional pool (5), a second multifunctional pool (6), a third multifunctional pool (7) and an MBR pool (8) which are connected in sequence; A first aeration pipe (41), a second aeration pipe (51), a third aeration pipe (61), and a fourth aeration pipe (71) are provided at the bottom of the anaerobic pool (4), the first multifunctional pool (5), the second multifunctional pool (6), and the third multifunctional pool (7) in sequence; air inlet ends of the first aeration pipe (41), the second aeration pipe (51), the third aeration pipe (61), and the fourth aeration pipe (71) are all connected to a first fan (91) via an air inlet pipe; A first valve (42) is provided on the air intake pipe between the first aeration pipe (41) and the first fan (91); a second valve (52) is provided on the air intake pipe between the second aeration pipe (51) and the first fan (91); a third valve (62) is provided on the air intake pipe between the third aeration pipe (61) and the first fan (91); and a fourth valve (72) is provided on the air intake pipe between the fourth aeration pipe (71) and the first fan (91); The bottoms of the first multifunctional pool (5) and the second multifunctional pool (6) are connected via a first bypass pipe (54); a second bypass pipe is also provided between the second multifunctional pool (6) and the third multifunctional pool (7); the second bypass pipe is arranged below the water outlet of the second multifunctional pool (6) and is not lower than the lowest liquid level of the second multifunctional pool (6) during normal operation; and a sixth valve (64) is provided on the second bypass pipe.

2. The highway service area domestic sewage treatment equipment with adjustable operation mode according to claim 1 is characterized in that: A fifth valve (55) is provided on the first bypass pipe (54).

3. The highway service area domestic sewage treatment equipment with adjustable operation mode according to claim 2 is characterized in that: A stirring device (53) is also provided in the first multifunctional pool (5); the stirring device (53) is located at the bottom of the first multifunctional pool (5).

4. The highway service area domestic sewage treatment equipment with adjustable operation mode according to claim 3 is characterized in that: The third multifunctional pool (7) is also provided with an overriding pipe; the overriding pipe is arranged below the water outlet of the third multifunctional pool (7); and the overriding pipe is provided with a seventh valve (73).

5. The highway service area domestic sewage treatment equipment with adjustable operation mode according to claim 4 is characterized in that: A first submersible sewage pump (74) is also provided in the third multifunctional pool (7); the first submersible sewage pump (74) is located at the bottom of the third multifunctional pool (7); the first submersible sewage pump (74) is connected to the anaerobic pool (4) via a first return pipe (75); The second multifunctional pool (6) is also provided with a DO meter (63).

6. The highway service area domestic sewage treatment equipment with adjustable operation mode according to claim 4 is characterized in that: An MBR membrane (81) is provided in the MBR pool (8); the MBR membrane (81) is located in the middle of the MBR pool (8); the bottom of the MBR membrane (81) is connected to a second fan (92) via a pipeline; A second submersible sewage pump (82) is also provided in the MBR pool (8); the second submersible sewage pump (82) is located at the bottom of the MBR pool (8); the second submersible sewage pump (82) is connected to the anaerobic pool (4) via a second return pipe (83); The water outlet of the MBR pool (8) is also connected to a filter (84).

7. The highway service area domestic sewage treatment equipment with adjustable operation mode according to claim 1 is characterized in that: The anaerobic tank (4) is also provided with a pH meter (43).

8. The highway service area domestic sewage treatment equipment with adjustable operation mode according to any one of claims 1 to 7, characterized in that: The anaerobic tank (4), the first multifunctional tank (5), the second multifunctional tank (6), the third multifunctional tank (7) and the MBR tank (8) are installed in the same housing; when in use, the first multifunctional tank (5) is an anoxic tank or an anaerobic tank, the second multifunctional tank (6) is an aerobic tank or an SBR tank, and the third multifunctional tank (7) is an aerobic tank or a sedimentation tank.

9. The highway service area domestic sewage treatment equipment with adjustable operation mode according to claim 8 is characterized in that: It also comprises a grille pool (1), a grease trap (2) and a regulating pool (3) which are connected in sequence; the grille pool (1), the grease trap (2) and the regulating pool (3) are located outside the housing; a grille (11) is also provided in the grille pool (1); the grease trap (2) is a three-stage grease trap; the water outlet of the regulating pool (3) is connected to the water inlet of the anaerobic pool (4); and a liquid level meter (31) is also provided on the regulating pool (3).

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