Combined expressway service area sewage treatment device

Abstract

The application relates to a combined expressway service area sewage treatment device, belonging to the sewage treatment field. The device comprises a pool body, the bottom of the inner cavity of the pool body is fixedly connected with a longitudinal partition plate one, the inner cavity of the pool body is fixedly connected with two longitudinal carbon steel plates, the top of the inner cavity of the pool body is fixedly connected with an outer-attached adsorption material isolation plate, the top of the pool body is penetrated through four pairs of symmetrical stirrers, and the bottom of the inner cavity of the pool body is provided with an aeration pipe group. The sewage pump and the hook-shaped conveying pipe can be used for conveying sewage to the inner cavity of the pool body, the stirrer and the aeration device are started, the sewage is subjected to stirring and aeration treatment, the sewage passes through the carbon steel plates and the outer-attached adsorption material isolation plate to the top of the hopper for sedimentation, the reflux pump is started, part of the sedimented organic matters are conveyed to the left side of the partition plate one by the reflux pump, the user needs to add a large amount of carbon source, and the cost consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment, and in particular to a combined wastewater treatment device for highway service areas. Background Technology

[0002] Wastewater from service areas mainly consists of toilet flushing wastewater, wastewater from management personnel and guests' accommodations, and catering wastewater. Therefore, its properties are similar to typical domestic sewage, but it also has its own characteristics. Firstly, the water quality is worse than typical domestic sewage. Toilet flushing wastewater accounts for the largest proportion of all wastewater in service areas, typically exceeding 50%, and it is characterized by high concentrations of organic pollutants and high nitrogen and phosphorus content, resulting in a high overall pollution load. Secondly, the wastewater quality fluctuates greatly. This is closely related to traffic volume and the number of vehicles entering the service area. Service areas have few permanent residents; wastewater is mainly generated by drivers and passengers stopping at service areas. The coming and going of vehicles is highly random, therefore the influent water quality of the service area's wastewater treatment facilities also fluctuates significantly, potentially changing considerably every hour, day, and month.

[0003] Traditional wastewater treatment processes are mature and have rich experience in operation and management in urban wastewater treatment plants. However, wastewater treatment in highway service areas is a small-scale process and cannot simply adopt the processes and management methods of urban wastewater treatment plants. It requires high investment and operating costs as well as a team of professional management personnel, which is not feasible for many small wastewater treatment facilities such as highway service areas.

[0004] Currently, most wastewater from highway service areas is treated before discharge. Common wastewater treatment methods often involve adding organic matter as a carbon source to adsorb and treat the wastewater. However, highway service areas have large wastewater discharge volumes, and adding large amounts of organic matter would be too costly. Therefore, a combined highway service area wastewater treatment device is needed. This device can use a reflux structure to return some of the filtered organic matter to the reaction zone, avoiding the need for users to add large amounts of carbon source and reducing costs. Utility Model Content

[0005] To address the existing technical problems, this application provides a combined highway service area sewage treatment device.

[0006] This application provides a combined highway service area sewage treatment device, employing the following technical solution: A combined highway service area sewage treatment device includes a tank body. A longitudinal partition is fixedly connected to the bottom of the tank body's inner cavity. Two longitudinal carbon steel plates are fixedly connected to the inner cavity of the tank body. An external adsorbent material isolation plate is fixedly connected to the top of the tank body. Four pairs of symmetrical agitators are installed through the top of the tank body. An aeration pipe assembly is installed at the bottom of the tank body's inner cavity. Three longitudinal hook-shaped conveying pipes are installed on the left side of the tank body, penetrating from the top of the tank body to the inner cavity. A sewage pump is connected to the bottom of the conveying pipe. Two symmetrical partitions are fixedly connected to the inner cavity of the pool. A sludge hopper is fixedly connected between one of the partitions and one of the partitions. A clear water pipe is installed through the right side of one of the partitions, and a self-cultivation zone inlet pipe is installed through the right side of the other partition. A pool outlet pipe is opened on the right side of the pool. A sludge pump is installed at the back of the pool. The inlet of the sludge pump is connected to the pool through a pipe. A return pump is installed at the front of the pool. The inlet of the return pump is connected to a water pipe, and the outlet of the return pump is connected to a water pipe. Both water pipes penetrate into the inner cavity of the pool.

[0007] Preferably, the inner cavity of the pool consists of a pre-anoxic zone, a pre-aerobic zone, a post-anoxic zone, and a post-aerobic zone from left to right. Each zone is divided into four compartments by two longitudinal carbon steel plates connected at the top and bottom, with an external adsorption material isolation plate fixedly connected at the top and a longitudinal partition plate fixedly connected at the bottom.

[0008] By adopting the above technical solution, sewage is transported to the inner cavity of the tank through a sewage pump and a hook-shaped conveying pipe. The agitator and aeration device are started to agitate and aerate the sewage. The sewage passes through a carbon steel plate and an external adsorbent material isolation plate to the top of the sludge hopper for sedimentation. The return pump is started to extract some of the settled organic matter and transport it to the left side of the first partition. This avoids the need for users to add a large amount of carbon source and reduces the cost.

[0009] Preferably, an emergency drain pipe is provided on the back of the pool body, the emergency drain pipe is located below the external absorbent material isolation plate, and the emergency drain pipe is located on the left side of the isolation plate.

[0010] Preferably, the top of the pool body is provided with an inspection port, and a protective cover plate is rotatably connected to the top of the inspection port. The inspection port is rectangular.

[0011] Preferably, an aeration device is provided on the front of the pool body, and the air inlet of the aeration pipe group extends to the outside of the pool body and is connected to the air outlet of the aeration device.

[0012] By adopting the above technical solution, and through the combined use of aeration pipe groups and aeration devices, when the sewage reaches the left side of the first partition, the aeration devices are activated, so that the aeration pipe groups can aerate the sewage, thus preventing the organic matter in the sewage from being difficult to separate and improving the speed of organic matter separation in sewage.

[0013] Preferably, the first water pipe extends into the inner cavity of the pool and is located above the mud hopper, and the second water pipe extends into the inner cavity of the pool and is located below the hook-shaped conveying pipe.

[0014] Preferably, the inner cavity of the pool is filled with a biofilm carrier packing material, which is located on the left side of the partition plate.

[0015] Preferably, the inner cavity of the pool is filled with a novel composite filler such as iron particles, and the novel composite filler such as iron particles is located on the right side of the inlet pipe of the autotrophic zone.

[0016] Preferably, the hook-shaped conveying pipe is a hook-shaped pipe, the clean water pipe is L-shaped, and valves are provided on the surface of the hook-shaped conveying pipe, the pool outlet pipe, and the emergency drainage pipe.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. This utility model uses a sewage pump and hook-shaped conveying pipe to transport sewage to the inner cavity of the tank. The agitator and aeration device are started to agitate and aerate the sewage, allowing it to pass through a carbon steel plate and an external adsorbent material partition plate to the top of the sludge hopper for sedimentation. The return pump is then started to extract some of the settled organic matter and transport it to the left side of the partition plate, avoiding the need for users to add a large amount of carbon source and reducing costs.

[0019] 2. This utility model uses the aeration pipe assembly and aeration device in combination. When the sewage reaches the left side of the first partition, the aeration device is activated, so that the aeration pipe assembly aerates the sewage, which avoids the difficulty of separating organic matter in the sewage and improves the speed of organic matter separation in sewage.

[0020] 3. This utility model combines adsorption, filtration, and sedimentation into a single device to achieve efficient removal of pollutants. The AO reaction zone is the core treatment unit, containing multi-cell, multi-stage baffle reaction zone sub-units. Through comparative experiments, we found that using multi-stage baffles effectively blocks the horizontal flow velocity of suspended solids, shortening the sedimentation time. The multi-stage baffle combined wastewater treatment device allows the wastewater to flow at a moderate velocity in the multi-stage tank, facilitating full contact between pollutants and adsorption materials, increasing purification time, and improving purification efficiency. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a frontal cross-sectional view of the structure of this utility model.

[0023] Figure 3 This is a top view of the structure of this utility model.

[0024] Figure 4 This is a top view sectional diagram of the structure of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. Tank body; 2. Partition 1; 3. Carbon steel plate; 4. External adsorption material partition plate; 5. Agitator; 6. Aeration pipe assembly; 7. Hook-shaped conveying pipe; 8. Sewage pump; 9. Partition 2; 10. Sludge hopper; 11. Clear water pipe; 12. Inlet pipe of the autogenous zone; 13. Outlet pipe of the tank body; 14. Sludge pump; 15. Return pump; 16. Emergency drainage pipe; 17. Inspection port; 18. Aeration device. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0027] Example 1:

[0028] Combination Figure 2 and Figure 3This application discloses a combined highway service area sewage treatment device, including a tank body 1. An emergency drainage pipe 16 is provided on the back of the tank body 1, located below the external adsorption material isolation plate 4 and to the left of the partition plate 2. An inspection port 17 is provided on the top of the tank body 1, with a protective cover rotatably connected to the top of the inspection port 17. The inspection port 17 is rectangular. The inner cavity of the tank body 1 is filled with biofilm carrier packing material, located to the left of the partition plate 2. The inner cavity of the tank body 1 is also filled with novel composite packing material such as iron particles, located to the right of the autotrophic zone inlet pipe 12. A longitudinal partition plate 2 is fixedly connected to the bottom of the inner cavity of the tank body 1. Two longitudinal carbon steel plates 3 are fixedly connected to the inner cavity of the tank body 1. An external adsorption material isolation plate 4 is fixedly connected to the top of the inner cavity of the tank body 1. Four pairs of symmetrical agitators 5 are installed through the top of the tank body 1. An aeration pipe group 6 is installed at the bottom of the inner cavity of the tank body 1. Three longitudinal hook-shaped conveying pipes 7 are installed on the left side of the pool body 1. The hook-shaped conveying pipes 7 penetrate from the top of the pool body 1 to the inner cavity of the pool body 1. The bottom of the hook-shaped conveying pipes 7 is connected to a sewage pump 8. Two symmetrical partitions 2 9 are fixedly connected to the inner cavity of the pool body 1. A sludge hopper 10 is fixedly connected between one of the partitions 1 2 and one of the partitions 2 9. A clear water pipe 11 is installed through the right side of one of the partitions 2 9, and a self-cultivation zone inlet pipe 12 is installed through the right side of the other partition 2 9. The pool body 1 A pool outlet pipe 13 is provided on the right side. A mud pump 14 is provided on the back of the pool body 1. The inlet of the mud pump 14 is connected to the pool body 1 through a pipe. A return pump 15 is provided on the front of the pool body 1. The inlet of the return pump 15 is connected to a water pipe 1, and the outlet of the return pump 15 is connected to a water pipe 2. Both water pipe 1 and water pipe 2 pass through the inner cavity of the pool body 1. Water pipe 1 passes through the inner cavity of the pool body 1 and is located above the mud hopper 10. Water pipe 2 passes through the inner cavity of the pool body 1 and is located below the hook-shaped conveying pipe 7. The inner cavity of the pool body, from left to right, consists of a pre-anoxic zone, a pre-aerobic zone, a post-anoxic zone, and a post-aerobic zone. Each zone is divided into four compartments by two longitudinal carbon steel plates connected at the top and bottom, respectively. An external adsorption material isolation plate is fixedly connected to the top, and a longitudinal partition 1 is fixedly connected to the bottom.

[0029] Example 2:

[0030] Combination Figure 3 and Figure 4An aeration device 18 is installed on the front of the tank body 1. The air inlet of the aeration pipe group 6 extends to the outside of the tank body 1 and is connected to the air outlet of the aeration device 18. Through the cooperation of the aeration pipe group 6 and the aeration device 18, when the sewage reaches the left side of the partition 2, the aeration device 18 is activated, so that the aeration pipe group 6 aerates the sewage, which avoids the organic matter in the sewage from being difficult to separate and improves the speed of organic matter separation in sewage. The hook-shaped conveying pipe 7 is a hook-shaped pipe, and the clear water pipe 11 is L-shaped. Valves are installed on the surface of the hook-shaped conveying pipe 7, the tank body outlet pipe 13 and the emergency drainage pipe 16.

[0031] Working Principle: In use, the user pumps sewage into the inner cavity of the tank 1 via the sewage pump 8 and hook-shaped conveying pipe 7, then starts the agitator 5 and aeration device 18 to agitate and aerate the sewage. The sewage passes through the carbon steel plate 3 and the external adsorbent material isolation plate 4, causing it to flow back and forth between the four inner cavities of the tank 1: a pre-anoxic zone, a pre-aerobic zone, a post-anoxic zone, and a post-aerobic zone. This allows the sewage to react within the inner cavity of the tank 1. At this time, the sewage flows past the top of the baffle 2 and reaches the sludge hopper 10. Settling occurs at the top. The return pump 15 is then activated to extract some of the settled organic matter and transport it to the left side of the partition 2, allowing the organic matter to react with the wastewater. This avoids the need for users to add large amounts of carbon source, reducing costs. The clear water settled at the top of the sludge hopper 10 will reach the space between the two partitions 9 through the clear water pipe 11, and then be transported to the right side of the self-aeration zone inlet pipe 12 through the self-aeration zone inlet pipe 12 to react with new compound fillers such as iron particles. Finally, the tank outlet pipe 13 is opened to discharge the treated wastewater.

[0032] In summary, this combined highway service area sewage treatment device uses a sewage pump 8 and a hook-shaped conveying pipe 7 to transport sewage to the inner cavity of the tank 1. The agitator 5 and aeration device 18 are then activated to agitate and aerate the sewage. The sewage then passes through a carbon steel plate 3 and an external adsorbent material isolation plate 4 to the top of the sludge hopper 10 for sedimentation. The return pump 15 is then activated to extract some of the settled organic matter and transport it to the left side of the partition 2. This avoids the need for users to add large amounts of carbon source, thus reducing costs.

[0033] Experiment: The impact of combined wastewater treatment devices on wastewater purification in service areas

[0034] This experiment primarily investigates the impact of combined wastewater treatment devices on the wastewater purification effect in service areas. Several experimental cases were designed, employing the structure of Example 1. All cases were designed as cubic tanks with a length-to-width ratio of 3:1. Within the tank, a tiered AO reaction zone was incorporated. A 20cm diameter outlet pipe was installed 50cm from the top of the sedimentation zone to guide the supernatant from the sedimentation zone into the clear water zone for storage. A 20cm diameter outlet pipe was also installed at the bottom of the clear water zone to direct the water to the post-autotrophic denitrification zone, which was filled with a novel composite packing material containing iron particles. To compare the purification effects of different combined pollutant treatment devices, wastewater containing pollutants of a predetermined concentration was passed through each device. The pollutant content of the purified effluent samples was measured, with each experimental group repeated three times and the average value taken.

[0035] Experimental Example 1

[0036] The combined wastewater treatment device of Example 1 is specifically divided into four compartments in the tank body, which are, from front to back, a pre-anoxic zone (1), a pre-aerobic zone (2), a post-anoxic zone (3), and a post-aerobic zone (4). All four compartments are equipped with a stirring device, and the pre-aerobic zone and the post-aerobic zone are equipped with a micro-aeration system.

[0037] Experimental Example 2

[0038] The combined wastewater treatment device of Example 1 is specifically divided into two compartments in the tank body, which are anoxic zone (1) and aerobic zone (2) from front to back. Both compartments are equipped with stirring devices, and the aerobic zone is equipped with a micro-aeration system.

[0039] Experimental Example 3

[0040] The combined wastewater treatment device of Example 1 is used, which specifically includes a stepped AO reaction zone in the tank divided into 4 compartments, from front to back: pre-anoxic zone (1), pre-aerobic zone (2), post-anoxic zone (3), and post-aerobic zone (4). All 4 compartments are equipped with a stirring device, and only the pre-aerobic zone is equipped with a micro-aeration system.

[0041] Experiment Example 4

[0042] The wastewater treatment device of Example 1 is specifically divided into four compartments in the tank, which are, from front to back, a pre-anoxic zone (1), a pre-aerobic zone (2), a post-anoxic zone (3), and a post-aerobic zone (4). All four compartments are equipped with a stirring device. The pre-aerobic zone and the post-aerobic zone are equipped with a micro-aeration system, and the autotrophic denitrification zone is omitted.

[0043] Table 1. Impact of the combined wastewater treatment unit on the wastewater purification effect in the service area.

[0044]

[0045] Experimental Results: As shown in Table 1, the purification effects of Experiments 2-4 were all inferior to the combined highway service area wastewater treatment device of Experiment 1. Specifically, the combined wastewater treatment device of Experiment 1, which includes a tiered AO reaction zone within the tank divided into a pre-anoxic zone, a pre-aerobic zone, a post-anoxic zone, and a post-aerobic zone, with micro-aeration systems in the pre-aerobic and post-aerobic zones, and an autotrophic denitrification zone following the AO reaction zone, showed the best purification effect. Furthermore, compared to using a single tiered AO reaction zone within the tank, omitting the autotrophic denitrification zone, or using a micro-aeration system in the pre-aerobic zone, the purification effects of COD, SS, and TN were all inferior to the purification effect of this novel combined device.

[0046] The above are all preferred experimental examples of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be included within the scope of protection of this application.

Claims

1. A combined highway service area sewage treatment plant, characterized by: The system includes a pool body (1), with a longitudinal partition plate (2) fixedly connected to the bottom of the inner cavity of the pool body (1), two longitudinal carbon steel plates (3) fixedly connected to the inner cavity of the pool body (1), an external adsorbent material isolation plate (4) fixedly connected to the top of the inner cavity of the pool body (1), four pairs of symmetrical stirrers (5) running through the top of the pool body (1), an aeration pipe group (6) set at the bottom of the inner cavity of the pool body (1), three longitudinal hook-shaped conveying pipes (7) set on the left side of the pool body (1), the hook-shaped conveying pipes (7) running through the top of the pool body (1) to the inner cavity of the pool body (1), and a sewage pump (8) connected to the bottom of the hook-shaped conveying pipes (7). Two symmetrical partition plates are fixedly connected to the inner cavity of the pool body (1). Two (9), a mud hopper (10) is fixedly connected between the partition one (2) and one of the partition two (9), a clear water pipe (11) is provided through the right side of one of the partition two (9), and a self-nurturing zone water inlet pipe (12) is provided through the right side of the other partition two (9). A pool body outlet pipe (13) is provided on the right side of the pool body (1). A mud pump (14) is provided on the back of the pool body (1). The inlet of the mud pump (14) is connected to the pool body (1) through a pipe. A return pump (15) is provided on the front of the pool body (1). The inlet of the return pump (15) is connected to a water pipe one, and the outlet of the return pump (15) is connected to a water pipe two. Both the water pipe one and the water pipe two are connected to the inner cavity of the pool body (1).

2. The combined highway service area sewage treatment device according to claim 1, characterized in that: The inner cavity of the pool body (1) consists of a pre-anoxic zone, a pre-aerobic zone, a post-anoxic zone, and a post-aerobic zone from left to right. It is divided into four compartments by two longitudinal carbon steel plates (3) connected to the top and bottom respectively, an external adsorption material isolation plate (4) fixedly connected to the top, and a longitudinal partition plate (2) fixedly connected to the bottom.

3. The combined expressway service area sewage treatment device according to claim 2, characterized in that: The inlet of the reflux pump (15) is connected to the bottom of the pre-anoxic zone, and the outlet is connected to the lower end of the mud pump (14).

4. The combined expressway service area sewage treatment device according to claim 1, characterized in that: An emergency drain pipe (16) is provided on the back of the pool body (1). The emergency drain pipe (16) is located below the external adsorbent material isolation plate (4) and is located on the left side of the partition plate (2).

5. The combined expressway service area sewage treatment device according to claim 1, characterized in that: The top of the pool body (1) is provided with an inspection port (17), and a protective cover plate is rotatably connected to the top of the inspection port (17). The inspection port (17) is rectangular.

6. A combined highway service area sewage treatment device according to claim 1, characterized in that: An aeration device (18) is provided on the front of the pool body (1). The air inlet of the aeration pipe group (6) extends to the outside of the pool body (1) and is connected to the air outlet of the aeration device (18).

7. A combined highway service area sewage treatment device according to claim 1, characterized in that: The first water pipe extends into the inner cavity of the pool body (1) and is located above the mud hopper (10), while the second water pipe extends into the inner cavity of the pool body (1) and is located below the hook-shaped conveying pipe (7).

8. A combined highway service area sewage treatment device according to claim 1, characterized in that: The inner cavity of the pool body (1) is filled with biofilm carrier packing material, which is located on the left side of the partition plate (2).

9. A combined highway service area sewage treatment device according to claim 1, characterized in that: The inner cavity of the pool (1) is filled with iron particles, which are located on the right side of the autotrophic zone inlet pipe (12).

10. A combined highway service area sewage treatment device according to claim 1, characterized in that: The hook-shaped conveying pipe (7) is a hook-shaped pipe, the clear water pipe (11) is L-shaped, and valves are provided on the surface of the hook-shaped conveying pipe (7), the pool outlet pipe (13) and the emergency drainage pipe (16).

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