Small-scale integrated sewage treatment equipment for free-range households

Abstract

The utility model belongs to sewage treatment technical field relates to a small -sized sewage integrated treatment equipment of scattered household, and aims at solving the problem that the existing scattered household sewage treatment equipment occupies the ground, single function, complex operation and the problem of insufficient adaptability. The equipment is provided with integrated sealing box, and the box is separated into pretreatment, biochemical treatment, advanced treatment and water outlet unit in turn along the water flow direction, and each unit is communicated through the flow guide pipe with control valve; The pretreatment unit is provided with detachable grid assembly and inclined plate sand trap, the biochemical treatment unit contains biological contact oxidation pond and aeration assembly, the advanced treatment unit is provided with quartz sand filter layer, activated carbon adsorption layer and ultrafiltration membrane assembly, the water outlet unit is equipped with water quality detection probe and online monitor, and can also be provided with automatic control module. The equipment has high integration, small occupation, simple operation and maintenance, stable treatment effect, and is suitable for scattered household small water quantity, water quality fluctuation big sewage purification, can realize sewage discharge standard.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a miniaturized integrated wastewater treatment device designed for the wastewater discharge characteristics of small-scale farmers (such as small-scale livestock and poultry farmers, rural households, etc.). Background Technology

[0002] Currently, wastewater discharge from rural areas and small-scale, scattered livestock farms in my country is becoming increasingly prominent. The wastewater from these farms is characterized by small discharge volumes, large fluctuations in water quality, and complex composition (containing large amounts of organic matter, suspended solids, nitrogen, phosphorus, and other pollutants). Furthermore, these farms often have limited space, relatively weak economic conditions, and a lack of professional wastewater treatment technicians.

[0003] Among existing wastewater treatment equipment, large-scale centralized treatment equipment requires high investment and a large area, making it clearly unsuitable for scattered small-scale farmers. Small-scale treatment equipment, on the other hand, often suffers from limited functionality, poor treatment efficiency, complex operation, and inconvenient maintenance. For example, some simple treatment devices can only achieve preliminary sedimentation, failing to effectively remove organic matter and harmful substances from wastewater. Direct discharge of treated wastewater can easily cause soil and water pollution. Other equipment, while possessing multi-stage treatment capabilities, has its modules scattered, making installation cumbersome and requiring professional operation and control, thus failing to meet the actual needs of small-scale farmers.

[0004] Therefore, developing a compact, highly integrated, effective, easy-to-operate, and low-cost small-scale integrated wastewater treatment equipment for small-scale livestock farmers is key to solving the current problem of wastewater treatment for these farmers. Summary of the Invention

[0005] The purpose of this utility model

[0006] To address the shortcomings of existing technologies, this utility model provides a small-scale integrated wastewater treatment device for small-scale farmers, which integrates wastewater pretreatment, biochemical treatment, advanced treatment, and effluent monitoring, achieving the goals of small size, stable treatment effect, simple operation and maintenance, and suitability for small-scale farmers' usage scenarios.

[0007] Technical solution

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a small-scale integrated sewage treatment equipment for free-range farmers, comprising an integrated sealed box, wherein the box is sequentially divided into a pretreatment unit, a biochemical treatment unit, a deep treatment unit and an effluent unit along the water flow direction, and the units are connected to each other through a guide pipe with a control valve; the pretreatment unit is provided with a sewage inlet pipe at the top, the effluent unit is provided with a purified water outlet pipe at the bottom, and a support base is installed at the bottom of the box.

[0009] The pretreatment unit is equipped with a detachable bar screen assembly and an inclined plate grit chamber. The bar screen assembly is located directly below the sewage inlet pipe and is used to intercept large impurities in the sewage. The bottom of the inclined plate grit chamber is equipped with a sludge discharge port, and a manual sludge discharge valve is installed at the sludge discharge port to facilitate the periodic discharge of settled sludge.

[0010] The biochemical treatment unit is equipped with a biological contact oxidation tank and an aeration assembly. The biological contact oxidation tank is filled with suspended biological packing material for attaching microorganisms to degrade organic matter in wastewater. The aeration assembly includes an aeration pump, a main aeration pipe, and distributed aeration heads. The aeration pump is fixed on the outside of the tank, the main aeration pipe extends to the bottom of the biological contact oxidation tank, and the distributed aeration heads are evenly connected to the main aeration pipe to provide sufficient oxygen for the microorganisms.

[0011] The deep treatment unit contains, from top to bottom, a quartz sand filter layer, an activated carbon adsorption layer, and an ultrafiltration membrane module. The quartz sand filter layer removes fine suspended solids from the wastewater, the activated carbon adsorption layer adsorbs odors, pigments, and some dissolved pollutants from the wastewater, and the ultrafiltration membrane module is fixed to the inner wall of the deep treatment unit by a support to trap colloids, bacteria, and other impurities in the water. A backwash pipe is located below the ultrafiltration membrane module, and the backwash pipe has several nozzles facing the membrane fibers. The backwash pipe is connected to an external flushing water pump to facilitate cleaning of the ultrafiltration membrane module and extend its service life.

[0012] The water outlet unit is equipped with a water quality detection probe and an overflow pipe. The water quality detection probe is electrically connected to the display panel on the outside of the housing to monitor the water quality in real time and provide feedback to the display panel. The top of the overflow pipe is higher than the purified water outlet pipe port. When the water level in the water outlet unit is too high, the water can be drained through the overflow pipe to avoid excessive pressure inside the equipment.

[0013] Furthermore, the detachable grid assembly includes a frame and a grid mesh. The frame is detachably connected to the slot on the inner wall of the pretreatment unit, which facilitates the cleaning and replacement of the grid mesh. The mesh opening diameter is 2-5mm, and the grid mesh is set at an angle of 30-45° to the horizontal plane, which improves the impurity interception efficiency and facilitates the sliding of impurities.

[0014] Furthermore, the inclined plate sedimentation tank is provided with several parallel inclined plates, which are inclined at a 60° angle to the horizontal plane. The bottom of the inclined plate sedimentation tank is a slope that slopes towards the sludge discharge port with a slope of 5-10°, which accelerates the sedimentation of sludge and guides the sludge to the sludge discharge port.

[0015] Furthermore, the suspended biological packing material has a spherical porous structure with a diameter of 10-20 mm. The packing material is filled with polyurethane sponge carrier to increase the attachment area of ​​microorganisms. The packing material in the biological contact oxidation tank accounts for 40-60% of the tank volume to ensure the number of microorganisms and improve the degradation effect.

[0016] Furthermore, the distributed aeration heads of the aeration assembly are microporous aeration discs with a pore size of 0.1-0.3 mm, which generate fine bubbles to improve oxygen utilization. The spacing between adjacent aeration discs is 20-30 cm, and a gas flow meter is provided between the aeration pump and the main aeration pipe to facilitate control of the aeration volume.

[0017] Furthermore, the quartz sand filter layer of the deep treatment unit has a thickness of 15-25cm and a quartz sand particle size of 0.5-1.2mm; the activated carbon adsorption layer has a thickness of 10-20cm and the activated carbon is granular with a particle size of 1-3mm, ensuring filtration and adsorption effects.

[0018] Furthermore, the ultrafiltration membrane module is a hollow fiber membrane with a pore size of 0.01-0.1μm, which has good retention effect and large water flow rate.

[0019] Furthermore, the integrated sealed enclosure is made of fiberglass or stainless steel, which is corrosion-resistant, lightweight, and high-strength; the enclosure is 1.2-1.8m long, 0.8-1.2m wide, and 1.0-1.5m high, making it compact and suitable for small-scale farming sites; the enclosure is equipped with an inspection door on the outside, which corresponds to each processing unit, facilitating equipment maintenance and component replacement.

[0020] Furthermore, the equipment also includes an automatic control module, which includes a controller and a liquid level sensor. The liquid level sensor is installed in the pretreatment unit and the biochemical treatment unit to monitor the water level in the unit. The controller is electrically connected to the liquid level sensor, the aeration pump, and the control valve. The controller is equipped with a start / stop button and a fault indicator light. When the water level is abnormal or the equipment malfunctions, the controller can automatically adjust the valve opening or stop the aeration pump and provide a warning through the fault indicator light, thereby achieving automated control and reducing the difficulty of operation.

[0021] Furthermore, the purified water outlet pipe of the water outlet unit is equipped with an online water quality monitor, which is electrically connected to the display panel to monitor the COD, ammonia nitrogen and other indicators of the water in real time and display them on the display panel; a sampling valve is provided at the end of the purified water outlet pipe to facilitate manual sampling and testing.

[0022] Beneficial effects

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. High degree of integration: The pretreatment, biochemical treatment, advanced treatment and effluent monitoring functions are integrated into a sealed box. The structure is compact and occupies a small area, requiring only 1-2㎡ of installation space, which is suitable for the small site needs of small-scale farmers.

[0025] 2. Stable treatment effect: Through a multi-stage treatment process of "grit interception - inclined plate grit removal - biodegradation - filtration adsorption - ultrafiltration interception", it can effectively remove pollutants such as suspended solids, organic matter, nitrogen and phosphorus and microorganisms from sewage. The COD removal rate of effluent reaches more than 85% and the suspended solids removal rate reaches more than 90%, which meets the rural sewage discharge standards.

[0026] 3. Easy to operate and maintain: It adopts detachable bar screen components, manual sludge discharge valves and corresponding inspection doors for each unit, which facilitates impurity cleaning, sludge discharge and component maintenance; equipped with an automatic control module and display panel, it provides real-time feedback on water quality and equipment operating status, and can be operated without professional technicians.

[0027] 4. Low cost: The equipment is made of fiberglass or stainless steel, which reduces manufacturing costs; automated control reduces energy consumption and operating costs, making it affordable for small-scale farmers.

[0028] 5. High practicality: Designed for small-volume and highly fluctuating wastewater from small-scale farmers, the treatment capacity is adapted to wastewater discharge of 5-20㎡ / d, and the tank is corrosion-resistant, impact-resistant, and adaptable to complex rural environments. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is an enlarged view of the preprocessing unit structure of this utility model;

[0031] Figure 3 This is an enlarged view of the biochemical treatment unit structure of this utility model;

[0032] Figure 4 This is an enlarged view of the structure of the depth processing unit of this utility model;

[0033] In the diagram: 1-Integrated sealed enclosure, 2-Pretreatment unit, 3-Biological treatment unit, 4-Advanced treatment unit, 5-Effluent unit, 6-Control valve, 7-Drainage pipe, 8-Sewage inlet pipe, 9-Purified water outlet pipe, 10-Support feet, 11-Removable bar screen assembly, 12-Inclined plate grit chamber, 13-Sludge discharge port, 14-Manual sludge discharge valve, 15-Biological contact oxidation tank, 16-Aeration assembly, 17-Suspended biological... 18-Aeration pump, 19-Main aeration pipe, 20-Distributed aeration head, 21-Quartz sand filter layer, 22-Activated carbon adsorption layer, 23-Ultrafiltration membrane module, 24-Support, 25-Water quality detection probe, 26-Overflow pipe, 27-Bar screen, 28-Slot, 31-Inclined plate, 32-Backwash pipe, 33-Nozzle, 34-Flushing water pump, 35-Gas flow meter, 36-Online water quality monitor, 37-Sampling valve. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-4 As shown, a small-scale integrated wastewater treatment device for free-range livestock farms includes an integrated sealed housing 1. The housing 1 is made of fiberglass and has a length of 1.5m, a width of 1.0m, and a height of 1.2m. Four support feet 10 are welded to the bottom of the housing 1, and the bottom of each support foot 10 is equipped with anti-slip pads. Inside the housing 1, partitions along the water flow direction sequentially form a pretreatment unit 2, a biological treatment unit 3, a deep treatment unit 4, and an effluent unit 5. The bottom of the partitions between each unit has guide holes, and guide pipes 7 with control valves 6 are installed at the guide holes to achieve controllable flow of wastewater between the units.

[0036] The pretreatment unit 2 is equipped with a sewage inlet pipe 8 welded to the top, which is connected to the sewage discharge outlet of the free-range farmers via a flexible hose. The pretreatment unit 2 is equipped with a detachable bar screen assembly 11 and an inclined plate grit chamber 12. The detachable bar screen assembly 11 is located directly below the sewage inlet pipe 8, and its frame is detachably connected to the slot 28 on the inner wall of the pretreatment unit 2 via bolts. The mesh size of the bar screen 27 is 3mm, and it is set at a 40° angle to the horizontal plane. The inclined plate grit chamber 12 is equipped with several parallel inclined plates 31, which are at a 60° angle to the horizontal plane. The bottom of the inclined plate grit chamber 12 is a sloped surface that slopes towards the sludge discharge outlet 13 with a slope of 8°. A manual sludge discharge valve 14 is installed at the sludge discharge outlet 13.

[0037] The biochemical treatment unit 3 is equipped with a biological contact oxidation tank 15 and an aeration assembly 16. The biological contact oxidation tank 15 is filled with suspended biological packing material 17, which is a spherical porous structure with a diameter of 15 mm. The internal filling material is polyurethane sponge carrier, and the filling volume accounts for 50% of the volume of the biological contact oxidation tank 15. The aeration assembly 16 includes an aeration pump 18, a main aeration pipe 19, and distributed aeration heads 20. The aeration pump 18 is fixed to the outside of the box 1 by bolts. The main aeration pipe 19 extends to the bottom of the biological contact oxidation tank 15. The distributed aeration heads 20 are microporous aeration discs with a pore size of 0.2 mm. The distance between adjacent aeration discs is 25 cm, and they are evenly connected to the main aeration pipe 19. A gas flow meter 35 is installed between the aeration pump 18 and the main aeration pipe 19.

[0038] The deep treatment unit 4 is provided with a quartz sand filter layer 21, an activated carbon adsorption layer 22 and an ultrafiltration membrane module 23 from top to bottom. The quartz sand filter layer 21 is 20cm thick and the quartz sand particle size is 0.8mm. The activated carbon adsorption layer 22 is 15cm thick and the activated carbon is granular with a particle size of 2mm. The ultrafiltration membrane module 23 is a hollow fiber membrane with a pore size of 0.05μm. It is fixed to the inner wall of the deep treatment unit 4 by a bracket 24. A backwash pipe 32 is provided below the ultrafiltration membrane module 23. The backwash pipe 32 is provided with several nozzles 33 facing the membrane fibers. The backwash pipe 32 is connected to an external flushing water pump 34.

[0039] The bottom of the water outlet unit 5 is welded with a purified water outlet pipe 9, and the purified water outlet pipe 9 is equipped with an online water quality monitor 42 and a sampling valve 43; the water outlet unit 5 is equipped with a water quality detection probe 25 and an overflow pipe 26, and the top of the overflow pipe 26 is 10cm higher than the port of the purified water outlet pipe 9.

[0040] The working process of this embodiment is as follows: Wastewater from free-range farmers enters the pretreatment unit 2 through the wastewater inlet pipe 8. First, it passes through the detachable screen assembly 11 to intercept large impurities (such as weeds, clumps of feces, etc.), and then flows into the inclined plate grit chamber 12. The silt in the wastewater settles rapidly under the action of the inclined plate 31. The settled silt is collected through the bottom slope of the chamber to the sludge discharge port 13, and is discharged periodically by opening the manual sludge discharge valve 14. The pretreated wastewater enters the biological contact oxidation tank 15 of the biochemical treatment unit 3 through the guide pipe 7. The aeration pump 18 is started, and oxygen is supplied to the biological contact oxidation tank 15 through the distributed aeration heads 20. The microorganisms attached to the suspended biological packing 17 are oxygenated in the aeration tank 15. The system degrades organic matter in wastewater under oxygen conditions. After biochemical treatment, the wastewater enters the advanced treatment unit 4, where it passes through a quartz sand filter layer 21 to remove fine suspended solids, an activated carbon adsorption layer 22 to adsorb odors and dissolved pollutants, and an ultrafiltration membrane module 23 to retain colloids and bacteria. The advanced treated wastewater then enters the effluent unit 5, where a water quality detection probe 25 and an online water quality monitor 36 monitor the effluent quality in real time. The monitoring data is fed back to the display panel 27, and the purified water that meets the standards is discharged through the purified water outlet pipe 9. If manual testing is required, samples can be taken through the sampling valve 37. When the water level in the effluent unit 5 is too high, the wastewater is discharged through the overflow pipe 26 to prevent excessive pressure inside the equipment.

[0041] During equipment operation, if the equipment malfunctions (such as the aeration pump 18 stopping or the liquid level being abnormal), the grid assembly 11 is disassembled for cleaning, and the ultrafiltration membrane assembly 23 is backwashed through the backwash pipe 32 and the flushing water pump 34 to ensure stable equipment operation.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any modifications, equivalent substitutions and improvements 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 small-scale integrated wastewater treatment device for free-range farmers, characterized in that, The device includes an integrated sealed housing, which is divided into a pretreatment unit, a biochemical treatment unit, a deep treatment unit, and an effluent unit along the water flow direction. The units are connected by a guide pipe with a control valve. The pretreatment unit is equipped with a sewage inlet pipe at the top, and the effluent unit is equipped with a purified water outlet pipe at the bottom. Support feet are installed at the bottom of the housing. The pretreatment unit is equipped with a detachable bar screen assembly and an inclined plate grit chamber. The bar screen assembly is located directly below the sewage inlet pipe, and the bottom of the inclined plate grit chamber is equipped with a sludge discharge port, at which a manual sludge discharge valve is installed. The biochemical treatment unit is equipped with a biological contact oxidation tank and an aeration assembly. The biological contact oxidation tank is filled with suspended biological packing material. The aeration assembly includes an aeration pump, a main aeration pipe and distributed aeration heads. The aeration pump is fixed on the outside of the tank. The main aeration pipe extends to the bottom of the biological contact oxidation tank and the distributed aeration heads are evenly connected to the main aeration pipe. The deep processing unit is provided with a quartz sand filter layer, an activated carbon adsorption layer and an ultrafiltration membrane assembly from top to bottom. The ultrafiltration membrane assembly is fixed to the inner wall of the deep processing unit by a bracket. The water outlet unit is equipped with a water quality detection probe and an overflow pipe. The water quality detection probe is electrically connected to the display panel on the outside of the box, and the top of the overflow pipe is higher than the purified water outlet pipe port.

2. The small-scale integrated wastewater treatment equipment for free-range farmers according to claim 1, characterized in that, The detachable grid assembly includes a frame and a grid mesh. The frame is detachably connected to the slot on the inner wall of the pretreatment unit. The mesh opening diameter is 2-5mm, and the grid mesh is set at an angle of 30-45° to the horizontal plane.

3. The small-scale integrated wastewater treatment equipment for free-range farmers according to claim 2, characterized in that, The inclined plate sedimentation tank is equipped with several parallel inclined plates, which are inclined at a 60° angle to the horizontal plane. The bottom of the sedimentation tank is a slope that slopes towards the sludge discharge port, with a slope of 5-10°.

4. The small-scale integrated wastewater treatment equipment for free-range farmers according to claim 3, characterized in that, The suspended biological packing material has a spherical porous structure with a diameter of 10-20 mm. The packing material is filled with polyurethane sponge carrier, and the filling volume of the packing material in the biological contact oxidation tank accounts for 40-60% of the tank volume.

5. The small-scale integrated wastewater treatment equipment for free-range farmers according to claim 4, characterized in that, The distributed aeration heads of the aeration assembly are microporous aeration discs with a pore size of 0.1-0.3 mm and a spacing of 20-30 cm between adjacent aeration discs. A gas flow meter is installed between the aeration pump and the main aeration pipe.

6. The small-scale integrated wastewater treatment equipment for free-range farmers according to claim 5, characterized in that, The quartz sand filter layer of the deep treatment unit has a thickness of 15-25cm and a quartz sand particle size of 0.5-1.2mm; the activated carbon adsorption layer has a thickness of 10-20cm and the activated carbon is granular with a particle size of 1-3mm.

7. The small-scale integrated wastewater treatment equipment for free-range farmers according to claim 6, characterized in that, The ultrafiltration membrane module is a hollow fiber membrane with a pore size of 0.01-0.1μm. A backwashing pipe is provided below the ultrafiltration membrane module, and the backwashing pipe is equipped with several nozzles facing the membrane fibers. The backwashing pipe is connected to an external flushing water pump.

8. The small-scale integrated sewage treatment equipment for free-range farmers according to claim 7, characterized in that, The integrated sealed enclosure is made of fiberglass or stainless steel. The enclosure is 1.2-1.8m long, 0.8-1.2m wide, and 1.0-1.5m high. An inspection door is provided on the outside of the enclosure, and the inspection door is set for each processing unit.

9. The small-scale integrated sewage treatment equipment for free-range farmers according to claim 8, characterized in that, It also includes an automatic control module, which includes a controller and a liquid level sensor. The liquid level sensor is installed in the pretreatment unit and the biochemical treatment unit. The controller is electrically connected to the liquid level sensor, the aeration pump and the control valve respectively. The controller is equipped with a start / stop button and a fault indicator light.

10. The small-scale integrated wastewater treatment equipment for free-range farmers according to claim 9, characterized in that, The purified water outlet pipe of the water outlet unit is equipped with an online water quality monitor, which is electrically connected to the display panel. A sampling valve is provided at the end of the purified water outlet pipe.

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