A farm sewage recycling device

Abstract

The utility model discloses a farm sewage recycling device, including controller, nitrate detector, circulating pump and upper and lower layer water tank group. Upper and lower layer water tank group interval setting, each contains a plurality of series water tank, and the upper layer water tank is connected through the upper water pipe (be located in the upper portion in side wall), and the lower layer is connected through the lower water pipe (be located in the lower portion in side wall). The first water tank of upper layer is connected sewage source through water inlet pump, and the last water tank of lower layer is equipped with drain pipe and electric valve, and the last water tank of upper layer is connected the first water tank of lower layer through the drain pipe. The top wall and side wall of water tank are equipped with glass window, and the top is equipped with curved air pipe. Circulating pump draws water from the last water tank of lower layer to the first water tank of upper layer, and the last water tank of lower layer is equipped with upper and lower water level sensor. Nitrate detector monitors the water quality of the last water tank of lower layer, and controller links all parts. The device absorbs nitrate in the breeding sewage through the chlorella in the device, promotes the growth of chlorella, thereby obtains chlorella biological bait, reaches the purpose that the farm sewage is recycled.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture wastewater treatment technology, specifically to a wastewater recycling device for aquaculture farms. Background Technology

[0002] In aquaculture, the water in the aquaculture ponds undergoes nitrification in an oxygenation tank to remove ammonia nitrogen and nitrite. The resulting nitrates also require regular water changes to reduce their concentration. If nitrate-containing wastewater from the aquaculture ponds is directly discharged into the external environment, it will increase nutrients in that water. If harmful algae such as cyanobacteria are present in the external water, it will promote their proliferation and growth.

[0003] Chlorella is an algae that can efficiently absorb nitrates. Chlorella grown in relatively clean aquaculture farms containing nitrates can be collected and used as feed for other organisms.

[0004] Therefore, a wastewater recycling device for aquaculture farms is designed. Chlorella is placed in the device, and the chlorella absorbs nitrates in the aquaculture wastewater, promoting the growth of chlorella and thus obtaining chlorella biological feed, achieving the purpose of recycling aquaculture farm wastewater. Utility Model Content

[0005] The purpose of this invention is to provide a wastewater recycling device for livestock farms to solve the problems described in the background art.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A wastewater recycling device for aquaculture farm includes a controller, a nitrate detector, a circulation pump, a lower water tank assembly, and an upper water tank assembly positioned above the lower water tank assembly. The lower water tank assembly comprises multiple spaced-apart tanks, and the upper water tank assembly also comprises multiple spaced-apart tanks. The tanks in the upper water tank assembly are connected in series via an upper water pipe, and the tanks in the lower water tank assembly are connected in series via a lower water pipe. The upper water pipe is located in the upper-middle part of the side wall of the tanks in the upper water tank assembly, and the lower water pipe is located in the lower-middle part of the side wall of the tanks in the lower water tank assembly. The tank at the beginning of the series in the upper water tank assembly is also connected to an inlet pipe higher than the upper water pipe, and an inlet pump is installed on the inlet pipe. The side wall of the tank at the end of the series in the lower water tank assembly is also connected to a drain pipe flush with the lower water pipe, and an electric valve is installed on the drain pipe. The side wall of the tank at the end of the series in the upper water tank assembly is also connected to the tank at the beginning of the series in the lower water tank assembly via a drain pipe. The upper end of the drain pipe on the side wall of the water tank is flush with the upper water pipe, and the lower end of the drain pipe is higher than the lower water pipe. The top and side walls of the water tank are also equipped with glass windows. The top of the water tank is also connected to a vent pipe. The nitrate detector is used to detect the water quality in the water tank at the end of the series in the lower water tank group. The inlet of the circulation pump is connected to the side wall of the water tank at the end of the series in the lower water tank group through a pumping pipe, and the pumping pipe is lower than the lower water pipe. The outlet of the circulation pump is connected to the wall of the water tank at the beginning of the series in the upper water tank group through an outlet pipe, and the outlet of the outlet pipe is not lower than the upper water pipe. The side wall of the water tank at the end of the series in the lower water tank group is also equipped with an upper water level sensor and a lower water level sensor. The lower water level sensor is located below the upper water level sensor and is not lower than the drain pipe. The inlet pump, circulation pump, electric valve, nitrate detector, upper water level sensor and lower water level sensor are all electrically connected to the controller.

[0008] When using the above scheme, wastewater containing nitrates from the aeration and nitrification treatment at the aquaculture farm is discharged into a transfer tank. An inlet pump draws the wastewater from the transfer tank into the upper tank assembly. Chlorella is placed in both the upper and lower tank assemblies. After entering the upper tank assembly, the wastewater overflows through the top water pipe as the water level rises, until it reaches the overflow height of the last tank in the series connection. Then, it flows through the drain pipe into the lower tank assembly and overflows through the bottom water pipe until it reaches the upper water level sensor. Once the upper water level sensor detects the water level signal, the inlet pump stops operating. During this period, a nitrate detector continuously monitors the nitrate content in the tanks online. When the nitrate content does not meet the discharge standard, the electric valve does not open. When the nitrate content meets the discharge standard, the electric valve opens, discharging and collecting the Chlorella solution from the tanks. When the lower water level sensor detects insufficient water, the electric valve closes, and the inlet pump starts.

[0009] During initial operation, once both the upper and lower water tanks are full (i.e., the water level in the tanks reaches the upper water level sensor), the circulation pump is continuously started. The circulation pump draws the Chlorella solution from the last tank in the lower water tank group back to the first tank in the upper water tank group, ensuring that the Chlorella solution continuously circulates in multiple tanks. This prevents the Chlorella solution from accumulating in the last tank of the lower water tank group and being emptied, thus guaranteeing the recycling of Chlorella.

[0010] By setting up upper and lower water tank groups, separating them with an air gap, and spacing between tanks within the same level, and by adding glass windows to the top and side walls of the tanks, this device effectively improves the growth of Chlorella and the absorption efficiency of nitrates. Compared to traditional pools where sunlight cannot penetrate the surface to reach the algae even with sufficient light, this design allows the algae in the tanks to receive ample sunlight, thus significantly enhancing their growth.

[0011] By installing a vent pipe, the gas inside and outside the water tank can be exchanged, while preventing a large number of other plant and algal cells carried by the outside air from entering the water tank, thus ensuring the normal operation of Chlorella.

[0012] A further technical solution is that a top window is provided on the top wall of the water tank, and a white glass is provided in the top window; a side window is provided on the side wall of the water tank, and a white glass is provided in the side window.

[0013] When using the above method, clear glass helps to observe the condition of Chlorella in the water tank and provides sufficient light.

[0014] A further technical solution is that the water pipes connected to the water tanks of the lower water tank group are on the same horizontal plane and staggered from each other.

[0015] When using the above scheme, staggered lower water pipes facilitate the complete exchange of water in the water tank.

[0016] A further technical solution is that the water pipes connected to the upper water tank group are on the same horizontal plane and staggered from each other.

[0017] When using the above scheme, staggered lower water pipes facilitate the complete exchange of water in the water tank.

[0018] A further technical solution is to install the upper water level sensor on the upper middle part of the side wall of the lower water tank group, which is the last water tank in the series connection.

[0019] A further technical solution is that each water tank in the lower water tank group is also provided with a separate support. The number of water tanks in the upper water tank group is the same as the number of water tanks in the lower water tank group. The positions of the water tanks in the upper water tank group are aligned one-to-one with the positions of the water tanks in the lower water tank group. The water tanks in the upper water tank group are located on the support.

[0020] A further technical solution is that the bottom of the vent pipe is connected to the top wall of the water tank, and the upper end of the vent pipe is a curved pipe that bends downward so that the upper end of the vent pipe faces downward.

[0021] When using the above method, pointing the vent pipe downwards can further effectively prevent external plants and algae from entering.

[0022] A further technical solution is that the nitrate detector also includes a probe, which is located in the last tank in the series of the lower water tank group and is lower than the lower water pipe.

[0023] The beneficial effects of this utility model are as follows:

[0024] 1. Highly efficient water purification and resource recycling: By absorbing nitrates through Chlorella, combined with an automated nitrate detection and circulation pump system, wastewater is highly purified. After meeting standards, it is either discharged or the algae resources are collected, forming a closed loop of "wastewater-algae absorption-resource recovery". At the same time, the circulation pump pumps the algae solution from the lower tank back to the upper tank, avoiding the decrease in treatment efficiency caused by algae deposition and extending the algae's activity cycle.

[0025] 2. Optimized Chlorella Growth Environment: The upper and lower tanks are separated by a gap, and the white glass windows on the top and side walls significantly improve light transmission, solving the problem of insufficient light in traditional tanks and promoting Chlorella photosynthesis. Staggered water pipes (upper / lower) promote water flow, avoid algae accumulation in dead zones, and ensure uniform light exposure. The aeration pipes are curved downwards, ensuring gas exchange while preventing the intrusion of external pollutants, maintaining the stability of the algae growth environment.

[0026] 3. Intelligent and Automated Control: The controller links the nitrate detector, water level sensor, electric valves, and pump set to achieve: automatic start / stop of the inlet pump (replenishing water when the level is insufficient); automatic discharge after reaching the standard (opening the electric valve when the nitrate level is qualified); and forced circulation mode (starting the circulation pump during initial operation or when algae accumulate). Precise Water Level Management: Upper / lower water level sensors work in conjunction with the drain pipe to ensure the water level remains stable within the optimal treatment range, avoiding the risk of overflow or drying out.

[0027] 4. Structural and Space Optimization: The upper and lower water tank assemblies are stacked in alignment, saving floor space and facilitating large-scale expansion. Independent supports for the upper water tank reduce civil engineering costs and adapt to different site conditions.

[0028] 5. Hydraulic flow optimization: The series water tanks form an "S-shaped" flow channel through staggered water pipes, which enhances water mixing and improves the uniformity of treatment.

[0029] 6. By recycling and utilizing algae resources (such as biofuels and feed ingredients), wastewater discharge can be reduced, thus alleviating environmental pressure.

[0030] 7. Reduced maintenance costs: The white glass window makes it easier to observe the algae, reducing the frequency of opening the lid for inspection. Attached Figure Description

[0031] Figure 1 This is a top view of the present invention;

[0032] Figure 2 This is the left view of the present invention;

[0033] Figure 3 This is a front view of the present invention (some parts are hidden);

[0034] Figure 4 for Figure 1 Front view along line AA.

[0035] In the diagram, 1. Support frame, 2. Water tank, 3. Vent pipe, 4. Top window, 5. Clear glass, 6. Controller, 7. Inlet pipe, 8. Inlet pump, 9. Top water pipe, 10. Drain pipe, 11. Electric valve, 12. Nitrate detector, 13. Circulation pump, 14. Pumping pipe, 15. Outlet pipe, 16. Drain pipe, 17. Bottom water pipe, 18. Side window, 19. Probe, 20. Top water level sensor, 21. Bottom water level sensor. Detailed Implementation

[0036] To better understand the technical content of this utility model, specific embodiments are provided below, and the utility model will be further described in conjunction with the accompanying drawings.

[0037] See Figures 1 to 4 A wastewater recycling device for livestock farms includes a controller, a nitrate detector, a circulation pump, a lower water tank group, and an upper water tank group disposed above the lower water tank group. The lower water tank group includes three or more water tanks spaced apart, and the upper water tank group includes multiple water tanks spaced apart. The number of water tanks in the upper water tank group is the same as the number of water tanks in the lower water tank group.

[0038] Specifically, each tank in the lower water tank group is also equipped with a separate support. The number of tanks in the upper water tank group is the same as that in the lower water tank group. The positions of the tanks in the upper water tank group are aligned one-to-one with the positions of the tanks in the lower water tank group. The tanks in the upper water tank group are mounted on the support.

[0039] The water tanks of the upper water tank group are connected in series by an upper water pipe, which is located in the upper middle part of the side wall of the water tank of the upper water tank group.

[0040] Preferably, the water pipes connected to the upper water tanks of the upper water tank group are on the same horizontal plane and staggered from each other.

[0041] The water tanks in the lower water tank group are connected in series by a lower water pipe, which is located in the lower middle part of the side wall of the water tank in the lower water tank group.

[0042] Preferably, the water pipes connected to the water tanks of the lower water tank group are on the same horizontal plane and staggered from each other.

[0043] The water tank at the top of the upper water tank group is also connected to an inlet pipe that is higher than the upper water pipe, and an inlet pump is also installed on the inlet pipe.

[0044] The side wall of the water tank at the end of the series connection in the lower water tank group is also connected to a drain pipe that is flush with the lower water pipe, and an electric valve is also installed on the drain pipe.

[0045] The side wall of the water tank at the end of the series connection in the upper water tank group is also connected to the side wall of the water tank at the beginning of the series connection in the lower water tank group through a drain pipe. The upper end of the drain pipe is flush with the upper water pipe, and the lower end of the drain pipe is higher than the lower water pipe.

[0046] The top and side walls of the water tank are equipped with glass windows, and the top of the water tank is also connected to a vent pipe.

[0047] Specifically, a top window is provided on the top wall of the water tank, and a white glass cover is provided in the top window. A side window is provided on the side wall of the water tank, and a white glass cover is provided in the side window.

[0048] Preferably, the bottom of the vent pipe is connected to the top wall of the water tank, and the upper end of the vent pipe is a curved pipe that bends downward so that the upper end of the vent pipe faces downward.

[0049] The nitrate detector is used to test the water quality in the tank at the end of the series connection in the lower water tank group.

[0050] Specifically, the nitrate detector also includes a probe, which is located in the last tank in the series of the lower water tank group and is lower than the lower water pipe.

[0051] The inlet of the circulating pump is connected to the side wall of the last tank in the series of the lower water tank group through a pumping pipe, and the pumping pipe is lower than the lower water inlet pipe. The outlet of the circulating pump is connected to the wall of the first tank in the series of the upper water tank group through an outlet pipe, and the outlet of the outlet pipe is not lower than the upper water inlet pipe.

[0052] The lower water tank group is equipped with an upper water level sensor and a lower water level sensor on the side wall of the tank at the end of the series connection. The lower water level sensor is located below the upper water level sensor and is not lower than the drain pipe.

[0053] Preferably, the upper water level sensor is located in the upper middle part of the side wall of the lower water tank group, which is the last water tank in the series connection.

[0054] Preferably, the controller uses an STM32 microcontroller or a SMART200 PLC controller.

[0055] The inlet pump, circulation pump, electric valve, nitrate detector, upper water level sensor, and lower water level sensor are all electrically connected to the controller.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wastewater recycling device for livestock farms, characterized in that: The system includes a controller, a nitrate detector, a circulating pump, a lower water tank assembly, and an upper water tank assembly positioned above it. The lower and upper water tank assemblies each consist of multiple spaced-apart tanks. The tanks in the upper tank assembly are connected in series via an upper water pipe, while the tanks in the lower tank assembly are connected in series via a lower water pipe. The upper water pipe is located in the upper-middle part of the side wall of the upper tank assembly's tanks, and the lower water pipe is located in the lower-middle part of the side wall of the lower tank assembly's tanks. The tank at the beginning of the series connection in the upper tank assembly is also connected to an inlet pipe higher than the upper water pipe, and an inlet pump is installed on the inlet pipe. The tank at the end of the series connection in the lower tank assembly is connected to a drain pipe flush with the lower water pipe, and an electric valve is installed on the drain pipe. The side wall of the tank at the end of the series connection in the upper tank assembly is also connected to the side wall of the tank at the beginning of the series connection in the lower tank assembly via a drain pipe. The upper end of the pipe is flush with the upper water pipe, and the lower end of the drain pipe is higher than the lower water pipe. The top and side walls of the water tank are also equipped with glass windows. The top of the water tank is also connected to a vent pipe. The nitrate detector is used to detect the water quality in the water tank at the end of the series in the lower water tank group. The inlet of the circulation pump is connected to the side wall of the water tank at the end of the series in the lower water tank group through a pumping pipe, and the pumping pipe is lower than the lower water pipe. The outlet of the circulation pump is connected to the wall of the water tank at the beginning of the series in the upper water tank group through an outlet pipe, and the outlet of the outlet pipe is not lower than the upper water pipe. The side wall of the water tank at the end of the series in the lower water tank group is also equipped with an upper water level sensor and a lower water level sensor. The lower water level sensor is located below the upper water level sensor and is not lower than the drain pipe. The inlet pump, circulation pump, electric valve, nitrate detector, upper water level sensor and lower water level sensor are all electrically connected to the controller.

2. The wastewater recycling device for livestock farms according to claim 1, characterized in that: The water tank has a top window on its top wall, which is covered with white glass, and a side window on its side wall, which is also covered with white glass.

3. The wastewater recycling device for livestock farms according to claim 2, characterized in that: The water pipes connected to the lower water tank group are on the same horizontal plane and staggered from each other.

4. The wastewater recycling device for livestock farms according to claim 3, characterized in that: The water pipes connected to the upper water tank group are on the same horizontal plane and staggered from each other.

5. The wastewater recycling device for livestock farms according to claim 1, characterized in that: The upper water level sensor is located in the upper middle part of the side wall of the lower water tank group, which is the last water tank in the series connection.

6. The wastewater recycling device for livestock farms according to claim 1, characterized in that: Each tank in the lower water tank group is also equipped with a separate support. The number of tanks in the upper water tank group is the same as that in the lower water tank group. The positions of the tanks in the upper water tank group are aligned one-to-one with the positions of the tanks in the lower water tank group. The tanks in the upper water tank group are mounted on the support.

7. The wastewater recycling device for livestock farms according to claim 1, characterized in that: The bottom of the vent pipe is connected to the top wall of the water tank. The upper end of the vent pipe is a curved pipe, which bends downward so that the upper end of the vent pipe faces downward.

8. The wastewater recycling device for livestock farms according to claim 1, characterized in that: The nitrate detector also includes a probe, which is located in the last tank in the series of the lower water tank group and is below the lower water pipe.

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