A hog farm wastewater recirculating filtration system

Abstract

This invention provides a pig farm wastewater recycling and filtration system, including a solid-liquid separation tank, a sludge filter box, a hydrolysis acidification tank, an aeration tank, and a sedimentation tank. The solid-liquid separation tank is connected to an inlet pipe at its upper end and to the side wall of the sludge filter box via a connecting pipe at its lower end. The sludge filter box, hydrolysis acidification tank, aeration tank, and sedimentation tank are sequentially connected via connecting pipes. The solid-liquid separation tank is equipped with a filter screen to separate larger solid particles. The sludge filter box is equipped with filter gauze that divides the sludge filter box into a left chamber and a right chamber. Wastewater enters the left chamber, is filtered by the filter gauze, and then enters the right chamber. This invention implements staged filtration of pig farm wastewater, improving filtration efficiency and reducing the risk of clogging. Furthermore, water is sprayed onto the filter gauze through nozzles to wash away the sludge adhering to the filter gauze, further reducing the risk of clogging.

Description

Technical Field

[0001] This utility model relates to the field of pig farm wastewater treatment technology, specifically to a pig farm wastewater circulation filtration system. Background Technology

[0002] Pig farm wastewater mainly originates from pig manure, pig urine, and flushing water from the feeding area. Rich in nitrogen, phosphorus, organic matter, and high suspended solids, this high-concentration organic wastewater wastes a significant amount of water resources and pollutes water bodies, regardless of whether it is directly discharged or used for biogas production. Current pig farm wastewater treatment methods struggle to filter out the manure and fine sludge, easily clogging filtration systems. Furthermore, biodegradation is inefficient, resulting in low wastewater treatment overall. Utility Model Content

[0003] In order to overcome the problems existing in the background technology, this utility model provides a pig farm wastewater circulation filtration system to solve the technical problems mentioned in the background technology, such as the difficulty in filtering feces and fine sludge during existing pig farm wastewater treatment, which easily causes clogging of the filtration system and low wastewater treatment efficiency.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A pig farm wastewater recycling and filtration system includes a solid-liquid separation tank 1, a sludge filter box 2, a hydrolysis acidification tank 3, an aeration tank 4, and a sedimentation tank 5. The solid-liquid separation tank 1 is connected to an inlet pipe 11 at its upper end and to the side wall of the sludge filter box 2 via a connecting pipe 6 at its lower end. The sludge filter box 2, hydrolysis acidification tank 3, aeration tank 4, and sedimentation tank 5 are sequentially connected via the connecting pipe 6. The solid-liquid separation tank 1 is equipped with a filter screen 12 to separate larger solid particles. The sludge filter box 2 is equipped with filter gauze 23 that divides the sludge filter box 2 into a left chamber 21 and a right chamber 22. Wastewater enters the left chamber 21, is filtered by the filter gauze 23, and then enters the right chamber 22. The top of the left chamber 21 is uniformly equipped with nozzles 24 arranged side-by-side facing the filter gauze 23. The nozzles 24 are connected to a water supply pipe 25 located at the top of the sludge filter box 2, and the water supply pipe 25 is connected to a hydraulic pump 26 located at the top of the sludge filter box 2.

[0006] Preferably, the lower part of the side wall of the left chamber 21 is provided with a drain port 27 to facilitate the discharge of sludge. The drain port 27 is hinged to a cover plate 28 to close the drain port 27. The cover plate 28 is locked to the drain port 27 by a latch.

[0007] Preferably, the drain outlet 27 is provided with a rubber sealing ring to prevent water leakage.

[0008] Preferably, the filter screen 12 is secured to a support ring 13 provided on the inner wall of the solid-liquid separation tank 1 for supporting the filter screen 12; the top of the solid-liquid separation tank 1 is a hinged top cover that is easy to open, and the water inlet pipe 11 is connected to the top cover.

[0009] Preferably, a slider 41 is installed on the upper end of the aeration tank 4, and an air supply pipe 42 with its lower end extending into the wastewater in the aeration tank 4 is fixedly installed on the slider 41. The upper end of the air supply pipe 42 is connected to an air pump 44 installed on the side wall of the aeration tank 4 through a connecting hose 43.

[0010] Preferably, the slider 41 is slidably connected to the guide rod 45 and the lead screw 46 connected to the side wall of the aeration tank 4, and the lead screw 46 is drivenly connected to the motor 47 installed on the side wall of the aeration tank 4.

[0011] Preferably, the lower end sidewall of the gas supply pipe 42 is uniformly connected with circumferentially distributed gas outlet pipes 48.

[0012] Preferably, the connecting pipe 6 is equipped with a control valve with a control switch.

[0013] The beneficial effects of this utility model are as follows: This utility model first filters larger particles such as feed residue and food residue through a solid-liquid separation tank, and then filters finer particles such as feces and sludge through a sludge filter box, thus implementing staged filtration of pig farm wastewater, improving filtration efficiency and reducing the risk of clogging the filtration system; furthermore, water is sprayed onto the filter gauze through nozzles to wash away the mud adhering to the filter gauze, preventing the filter gauze from being clogged, further improving the filtration efficiency of the filter gauze and reducing the risk of clogging. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional cross-sectional view of the structure of the filter screen and the support ring.

[0016] Figure 3 This is a three-dimensional cross-sectional view of the sludge filter box.

[0017] Figure 4 This is a schematic diagram of the structure of the sewage outlet.

[0018] Figure 5 This is a schematic diagram of the aeration tank. Detailed Implementation

[0019] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0020] like Figure 1-5 As shown, this utility model provides a pig farm wastewater recycling and filtration system, including a solid-liquid separation tank 1, a sludge filter box 2, a hydrolysis acidification tank 3, an aeration tank 4, and a sedimentation tank 5; the upper end of the solid-liquid separation tank 1 is connected to a water inlet pipe 11, and the lower end is connected to the side wall of the sludge filter box 2 through a connecting pipe 6; the sludge filter box 2, the hydrolysis acidification tank 3, the aeration tank 4, and the sedimentation tank 5 are connected sequentially through the connecting pipe 6; the solid-liquid separation tank 1 is equipped with a filter screen to separate larger solid particles. 12. The sludge filter box 2 is provided with filter gauze 23 that divides the sludge filter box 2 into a left chamber 21 and a right chamber 22. Wastewater enters the left chamber 21, is filtered by the filter gauze 23, and then enters the right chamber 22. The top of the left chamber 21 is uniformly provided with nozzles 24 arranged side by side facing the filter gauze 23. The nozzles 24 are connected to the water supply pipe 25 provided on the top of the sludge filter box 2. The water supply pipe 25 is connected to the hydraulic pump 26 provided on the top of the sludge filter box 2. In use, the inlet pipe 11 is connected to the wastewater outlet of the pig farm, or a water pump is used to connect the inlet pipe 11 to the wastewater pool. The wastewater is pumped into the solid-liquid separation tank 1 for preliminary filtration. The wastewater passes through the filter screen 12 in the solid-liquid separation tank 1, where larger particles such as feed residue and food scraps are first filtered out, leaving these particles on the filter screen 12. Then, the wastewater enters the sludge filter box 2, passing through the filter gauze 23, where finer particles such as feces and sludge are filtered out. These finer particles remain in the left chamber 21 of the sludge filter box 2. When there is a large amount of sludge remaining on the filter gauze 23, the hydraulic pump 26 can pressurize the flushing water and spray it from the nozzle 24 to flush the sludge off the filter gauze 23, thereby restoring the filtering capacity of the filter gauze 23. Wastewater enters the hydrolysis acidification tank 3, where facultative and anaerobic bacteria decompose large organic molecules into smaller ones, achieving initial degradation. Then, the wastewater enters the aeration tank 4, where air or oxygen is introduced. Oxygen promotes the metabolic activity of microorganisms in the wastewater, further decomposing organic matter into inorganic matter, carbon dioxide, and water, thus purifying the wastewater. After purification, the wastewater enters the sedimentation tank 5 for sedimentation. The supernatant is then recycled back into the pig farm. This system implements staged filtration of pig farm wastewater, improving filtration efficiency and reducing the risk of clogging. Furthermore, water is sprayed onto the filter cloth 23 through nozzles 24 to wash away mud adhering to it, preventing clogging and further improving filtration efficiency while minimizing the risk of blockage.

[0021] The lower part of the side wall of the left chamber 21 is provided with a drain port 27 for easy discharge of sludge. The drain port 27 is hinged to a cover plate 28 to close the drain port 27. The cover plate 28 is locked to the drain port 27 by a latch. When too much sludge, feces, etc. are retained in the sludge filter box 2, the cover plate 28 can be opened to discharge the sludge.

[0022] The drain outlet 27 is equipped with a rubber sealing ring to prevent water leakage.

[0023] The filter screen 12 is secured to a support ring 13 on the inner wall of the solid-liquid separation tank 1. The top of the solid-liquid separation tank 1 is a hinged, easily opened top cover, to which the water inlet pipe 11 is connected. The filter screen 12 is secured to the support ring 13, facilitating its removal for cleaning of filtered residue. Opening the top cover of the solid-liquid separation tank 1 allows for easy removal of the filter screen 12. The water inlet pipe 11 is connected to the wastewater outlet via a flexible hose, facilitating the opening of the top cover.

[0024] A slider 41 is installed at the upper end of the aeration tank 4. An air supply pipe 42, with its lower end extending into the wastewater in the aeration tank 4, is fixedly installed on the slider 41. The upper end of the air supply pipe 42 is connected to an air pump 44 installed on the side wall of the aeration tank 4 via a connecting hose 43. Air or oxygen is introduced into the wastewater through the air supply pipe 42 by the air pump 44. Since the slider 41 can move the air supply pipe 42 left and right in the wastewater, air can be evenly introduced into the wastewater, while also having a certain stirring effect on the wastewater, thereby increasing the decomposition of organic matter in the wastewater and improving the filtration and circulation efficiency of the wastewater.

[0025] The slider 41 is slidably connected to the guide rod 45 and the lead screw 46 connected to the side wall of the aeration tank 4, and the lead screw 46 is driven by the motor 47 installed on the side wall of the aeration tank 4. The motor 47 drives the lead screw 46 to rotate, and the lead screw 46 is threadedly connected to the slider 41, thereby driving the slider 41 to move the air supply pipe 42 left and right along the guide rod 45.

[0026] The lower side wall of the gas supply pipe 42 is uniformly connected with circumferentially distributed gas outlet pipes 48. The multiple evenly arranged gas outlet pipes 48 can uniformly input air into the wastewater in multiple directions, thereby increasing the wastewater purification efficiency.

[0027] The connecting pipe 6 is equipped with a control valve with a control switch. The control valve facilitates the control of the flow of wastewater among multiple filter components and the control of the working time of each filter component.

[0028] Work process:

[0029] In use, the inlet pipe 11 is connected to the wastewater outlet of the pig farm, or a water pump is used to connect the inlet pipe 11 to the wastewater pool. The wastewater is pumped into the solid-liquid separation tank 1 for preliminary filtration. The wastewater passes through the filter screen 12 in the solid-liquid separation tank 1, where larger particles such as feed residue and food scraps are first filtered out, leaving them on the filter screen 12. Then, the wastewater enters the sludge filter box 2, where it passes through the filter gauze 23, where finer particles such as feces and sludge are filtered out. These finer particles remain in the left chamber 21 of the sludge filter box 2. When a large amount of sludge remains on the filter gauze 23, it can be drained... The flushing water is pressurized by the hydraulic pump 26 and sprayed out from the nozzle 24 to wash the sludge on the filter gauze 23, thereby restoring the filtration capacity of the filter gauze 23. The filtered wastewater enters the hydrolysis acidification tank 3, where facultative and anaerobic bacteria decompose large organic molecules into small organic molecules, carrying out preliminary degradation of organic matter. Then, the wastewater enters the aeration tank 4, where air or oxygen is introduced to promote the metabolic activities of microorganisms in the wastewater, decomposing organic matter into inorganic matter, carbon dioxide, and water, thereby purifying the wastewater. After purification, the wastewater enters the sedimentation tank 5, where it undergoes sedimentation. The supernatant is then taken and recycled back into the pig farm.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A swine lagoon wastewater recycling filtration system characterized by: The system includes a solid-liquid separation tank (1), a sludge filter box (2), a hydrolysis acidification tank (3), an aeration tank (4), and a sedimentation tank (5). The upper end of the solid-liquid separation tank (1) is connected to an inlet pipe (11), and the lower end is connected to the side wall of the sludge filter box (2) through a connecting pipe (6). The sludge filter box (2), the hydrolysis acidification tank (3), the aeration tank (4), and the sedimentation tank (5) are connected in sequence through the connecting pipe (6). The solid-liquid separation tank (1) is equipped with a filter screen (12) to separate larger solid particles. The sludge filter box (2) is connected to the side wall of the sludge filter box (2). The sludge filter box (2) is equipped with a filter gauze (23) that divides the sludge filter box (2) into a left chamber (21) and a right chamber (22). Wastewater enters the left chamber (21), is filtered by the filter gauze (23), and then enters the right chamber (22). The top of the left chamber (21) is uniformly equipped with nozzles (24) arranged side by side facing the filter gauze (23). The nozzles (24) are connected to the water supply pipe (25) set on the top of the sludge filter box (2). The water supply pipe (25) is connected to the hydraulic pump (26) set on the top of the sludge filter box (2).

2. A hog lagoon wastewater recirculation filtration system as defined in claim 1 wherein: The lower part of the side wall of the left chamber (21) is provided with a drain port (27) to facilitate the discharge of sludge. The drain port (27) is hinged with a cover plate (28) to close the drain port (27). The cover plate (28) is locked on the drain port (27) by a latch.

3. A hog lagoon wastewater recirculation filtration system as defined in claim 2 wherein: The drain outlet (27) is equipped with a rubber sealing ring to prevent water leakage.

4. A hog lagoon wastewater recirculation filtration system as defined in claim 1 wherein: The filter screen (12) is attached to a support ring (13) provided on the inner wall of the solid-liquid separation tank (1) for supporting the filter screen (12); the top of the solid-liquid separation tank (1) is a hinged top cover that is easy to open, and the water inlet pipe (11) is connected to the top cover.

5. A swine lagoon water recirculating filtration system according to any one of claims 1-4, characterized in that: The aeration tank (4) is equipped with a slider (41) at the upper end. A gas supply pipe (42) with its lower end extending into the wastewater in the aeration tank (4) is fixedly installed on the slider (41). The upper end of the gas supply pipe (42) is connected to an air pump (44) installed on the side wall of the aeration tank (4) through a connecting hose (43).

6. A hog lagoon wastewater recirculation filtration system as defined in claim 5 wherein: The slider (41) is slidably connected to the guide rod (45) and the lead screw (46) connected to the side wall of the aeration tank (4), and the lead screw (46) is driven by the motor (47) installed on the side wall of the aeration tank (4).

7. A hog lagoon wastewater recirculation filtration system as defined in claim 6 wherein: The lower end sidewall of the gas transmission pipe (42) is uniformly connected with circumferentially distributed gas outlet pipes (48).

8. A hog lagoon wastewater recirculation filtration system as defined in claim 1 wherein: The connecting pipe (6) is equipped with a control valve with a control switch.

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