Domestic non-powered sewage treatment system

Abstract

The application relates to a domestic non-powered sewage treatment system, which comprises an anoxic tank, a reflux tank, a biological filter tank and a siphon assembly. The anoxic tank is provided with a through hole communicating with the biological filter tank near the bottom. The reflux tank is provided with an overflow port communicating with the biological filter tank on the tank wall, and the height of the overflow port is higher than that of the drain port. The siphon assembly comprises a U-shaped siphon pipe and a conical plug arranged at the first end of the U-shaped siphon pipe. The U-shaped siphon pipe is arranged between the reflux tank and the anoxic tank. When a large amount of sewage is generated, the sewage can flow into the reflux tank through the biological filter tank and the overflow port. When the liquid level in the anoxic tank is lower than a set value, the conical plug drops with the liquid level, at this time, the two ends of the U-shaped siphon pipe are connected, and the sewage in the reflux tank can flow into the anoxic tank under the action of the U-shaped siphon pipe. When a large amount of sewage is generated, the excess sewage can be temporarily stored in the reflux tank, so that the anoxic tank and the biological filter tank can continuously and timely treat the sewage.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more particularly to a household non-powered wastewater treatment system. Background Technology

[0002] Existing wastewater treatment technologies are mainly aimed at urban wastewater treatment. These technologies and processes are relatively mature, employing wastewater pipe networks for collection and centralized treatment. However, due to the dispersed residences of rural households, significant differences in population or the number of households in villages, the daily wastewater volume generated by each household is relatively small, while water consumption varies greatly and intermittent periods are long. When water consumption is high, wastewater treatment devices often experience problems with untimely processing. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] This invention provides a household non-powered sewage treatment system, which aims to solve the problem that sewage treatment devices in the prior art are prone to untimely treatment when water consumption varies greatly.

[0005] (II) Technical Solution

[0006] To address the aforementioned problems, the present invention provides a household non-powered sewage treatment system, characterized in that the household non-powered sewage treatment system comprises: an anoxic tank, a return tank, a biological filter, and a siphon assembly;

[0007] Both the anoxic tank and the biofilter are equipped with filter media, and the anoxic tank has a through hole near the bottom that communicates with the biofilter.

[0008] The biological filter tank is provided with a drain outlet, and the wall of the return tank is provided with an overflow outlet that communicates with the biological filter tank. The height of the overflow outlet is higher than the height of the drain outlet.

[0009] The siphon assembly includes a U-shaped siphon tube and a conical plug. The first end of the U-shaped siphon tube is located in the anoxic pool through the inlet of the anoxic pool, and the second end of the U-shaped siphon tube is located in the reflux pool. The conical plug is located at the first end of the U-shaped siphon tube. When the liquid level in the anoxic pool is higher than a set value, the conical plug can block the first end of the U-shaped siphon tube; when the liquid level in the anoxic pool is lower than the set value, the conical plug can move away from the first end of the U-shaped siphon tube.

[0010] Preferably, the anoxic pool is provided with a first partition and a second partition parallel to its length, and the first partition and the second partition can divide the anoxic pool into a first cavity, a second cavity and a third cavity, with the second cavity located between the first cavity and the third cavity;

[0011] The bottom of the first cavity is connected to the bottom of the second cavity, the top of the second cavity is connected to the top of the third cavity, the through hole is provided on the third cavity and the through hole is located near the bottom of the third cavity, and the inlet of the anoxic pool is located at the top of the first cavity.

[0012] Preferably, the household non-powered sewage treatment system further includes: a backwashing assembly;

[0013] The backwash assembly includes a first backwash pipe, a second backwash pipe, a third backwash pipe, and a fourth backwash pipe connected in sequence, and each of the first backwash pipe, the second backwash pipe, the third backwash pipe, and the fourth backwash pipe is provided with multiple backwash ports.

[0014] The first backwash pipe is located at the bottom of the first cavity, the second backwash pipe is located at the top of the second cavity, the third backwash pipe is located at the bottom of the third cavity, and the fourth backwash pipe is located at the top of the biofilter.

[0015] Preferably, the third cavity is provided with a movable sealing door at the through hole, and the sealing door can block the through hole.

[0016] Preferably, a first backwash outlet, a second backwash outlet, and a third backwash outlet are respectively provided on the sidewalls of the first cavity, the second cavity, and the third cavity; a fourth backwash outlet is provided on the sidewall of the biofilter near the bottom.

[0017] The first backwash outlet is located at the top of the anoxic tank, the second backwash outlet is located at the bottom of the anoxic tank, and the third backwash outlet is located at the top of the anoxic tank.

[0018] Preferably, the household non-powered sewage treatment system further includes a septic tank;

[0019] The septic tank is connected to the inlet of the anoxic tank, and the liquid in the septic tank can overflow into the anoxic tank.

[0020] Preferably, the siphon assembly further includes a guide cylinder. The guide cylinder is located inside the anoxic pool and is in communication with the anoxic pool. The first end of the U-shaped siphon tube and the conical plug are both located inside the guide cylinder. The conical plug can move along the guide cylinder and block or move away from the first end of the U-shaped siphon tube.

[0021] Preferably, the U-shaped siphon pipe is further provided with an inspection port, the inspection port is provided with an inspection pipe, and the inspection pipe is provided with a valve.

[0022] Preferably, the biological filter includes a rectangular pool and a strip-shaped overflow trough disposed near the top of the rectangular pool;

[0023] The rectangular pool is connected to the anoxic pool through the through hole, and the fourth backwash pipe and the fourth backwash outlet are both located inside the rectangular pool;

[0024] The first end of the strip-shaped overflow channel is connected to the rectangular pool, and a drain outlet is provided at the second end of the strip-shaped overflow channel, with the overflow outlet located near the second end of the strip-shaped overflow channel.

[0025] (III) Beneficial Effects

[0026] This invention utilizes a U-shaped siphon pipe installed between the return tank and the anoxic tank. After a large amount of wastewater is generated, the wastewater can flow into the return tank through the biological filter and overflow outlet. When the liquid level in the anoxic tank is lower than a set value, the conical plug descends with the liquid level. At this time, the two ends of the U-shaped siphon pipe are connected, and the wastewater in the return tank can be guided into the anoxic tank by the action of the U-shaped siphon pipe. When a large amount of wastewater is generated, the excess wastewater can be temporarily stored in the return tank, thereby achieving a similar effect of peak shaving and valley filling, ensuring that the anoxic tank and biological filter can continuously treat wastewater. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the household non-powered sewage treatment system of the present invention;

[0028] Figure 2 This is an assembly diagram of the anoxic tank, reflux tank, biological filter, siphon assembly, and backwashing assembly in this invention.

[0029] Figure 3 This is a schematic diagram of the assembly of the anoxic tank, reflux tank, biofilter, siphon assembly and backwashing assembly in this invention from another perspective.

[0030] [Explanation of Labels in the Attached Image]

[0031] 1: Anoxic tank; 11: Through hole; 12: First baffle; 13: Second baffle; 14: First cavity; 15: Second cavity; 16: Third cavity; 17: First backwash outlet; 18: Second backwash outlet; 19: Third backwash outlet;

[0032] 2: Return pool; 21: Overflow outlet;

[0033] 3: Biological filter tank; 31: Drain outlet; 32: Fourth backwash outlet; 33: Rectangular tank; 34: Strip overflow trough;

[0034] 4: Siphon assembly; 41: U-shaped siphon tube; 42: Conical plug; 43: Guide tube; 44: Inspection tube; 45: Valve;

[0035] 5: Backwash assembly; 51: First backwash pipe; 52: Second backwash pipe; 53: Third backwash pipe; 54: Fourth backwash pipe;

[0036] 6: Septic tank. Detailed Implementation

[0037] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] This invention provides a household non-powered sewage treatment system, comprising: an anoxic tank 1, a return tank 2, a biological filter 3, and a siphon assembly 4. Both the anoxic tank 1 and the biological filter 3 are equipped with filter media. Near the bottom of the anoxic tank 1, a through-hole 11 communicating with the biological filter 3 is provided. The biological filter 3 is equipped with a drain outlet 31, and filter media is provided at the bottom of the biological filter 3. The wall of the return tank 2 is equipped with an overflow outlet 21 communicating with the biological filter 3, and the height of the overflow outlet 21 is higher than the height of the drain outlet 31. The siphon assembly 4 includes a U-shaped siphon tube 41 and a conical plug 42. The first end of the U-shaped siphon tube 41 is located inside the anoxic tank 1 through the inlet of the anoxic tank 1 (the inlet of the anoxic tank is located at the top of the anoxic tank for connection to an external pipe). The second end of the U-shaped siphon tube 41 is located inside the reflux tank 2. The conical plug 42 is located at the first end of the U-shaped siphon tube 41. When the liquid level in the anoxic tank 1 is higher than a set value, the conical plug 42 can block the first end of the U-shaped siphon tube 41; when the liquid level in the anoxic tank 1 is lower than the set value, the conical plug 42 can move away from the first end of the U-shaped siphon tube 41.

[0042] In this invention, domestic sewage flows into the anoxic tank 1 through the inlet of the anoxic tank via a pipe. After being filtered by the filter media, the sewage is filtered again by the filter media in the biological filter tank 3 through the through hole 11, thereby achieving sewage treatment. When a large amount of wastewater is generated from domestic life, the wastewater can flow into the return tank 2 through the biological filter 3 and the overflow port 21. When the liquid level in the anoxic tank 1 is lower than the set value, the conical plug 42 descends with the liquid level under the action of gravity. At this time, the two ends of the U-shaped siphon 41 are connected, and the wastewater in the return tank 2 can be guided into the anoxic tank 1 by the action of the U-shaped siphon 41. When the liquid level in the anoxic tank 1 is higher than the set value, the conical plug 42 rises with the liquid level under the action of buoyancy to block the first end of the U-shaped siphon 41, ensuring that the wastewater in the anoxic tank 1 will not enter the return tank 2. When a large amount of wastewater is generated, the excess wastewater can be temporarily stored in the return tank, similar to the peak shaving and valley filling effect, ensuring that the anoxic tank 1 and the biological filter 3 can continuously and timely treat the wastewater.

[0043] Furthermore, in this invention, the filter media is a commonly used material in water treatment systems, used to provide a surface for biofilm adhesion, promoting the degradation and removal of harmful substances in the water. Specifically, the filter media is bio-ceramic granules, a type of filter media made of sintered ceramics with a smooth surface and uniform density. Its characteristics include high porosity, which facilitates water flow and microbial adhesion, while also providing a high oxygen transfer rate. Bio-ceramic granules have good anti-fouling properties and are easy to clean and maintain. When wastewater passes through the filter media, because the anoxic tank 1 is an anoxic environment (the top of the anoxic tank 1 should actually be covered with a cover plate, making the interior of the anoxic tank 1 a closed cavity, but this invention, for the purpose of clearly illustrating the internal structure of the anoxic tank 1, uses...), Figure 2 andFigure 3 As shown, the cover plate on top of the anoxic tank 1 is hidden, which facilitates the denitrification reaction between wastewater and the filter media. The biological filter 3 provides an aerobic environment, which facilitates nitrification with the surface of the filter media, thereby achieving the effect of purifying wastewater. In the above wastewater treatment process, the movement of wastewater from the anoxic tank 1 to the biological filter 3 and from the biological filter 3 to the return tank 2 is achieved by the wastewater's own gravitational potential energy, while the movement of wastewater from the return tank 2 to the anoxic tank 1 through the siphon component 4 utilizes the principle of communicating vessels. The above wastewater movement process does not require additional energy, achieving powerless treatment.

[0044] Furthermore, the anoxic pool 1 is provided with a first partition 12 and a second partition 13 parallel to its length. The first partition 12 and the second partition 13 divide the anoxic pool 1 into a first chamber 14, a second chamber 15, and a third chamber 16. The second chamber 15 is located between the first chamber 14 and the third chamber 16. The bottom of the first chamber 14 is connected to the bottom of the second chamber 15, and the top of the second chamber 15 is connected to the top of the third chamber 16. A through hole 11 is provided on the third chamber 16, and the through hole 11 is located near the bottom of the third chamber 16. The inlet of the anoxic pool 1 is located at the top of the first chamber 14.

[0045] When wastewater enters the first chamber 14 from the top, it flows from top to bottom, then through the first partition 12 from the bottom of the first chamber 14 into the second chamber 15, then from bottom to top into the second chamber 15, and finally through the second partition 13 from the top of the second chamber 15 into the third chamber 16. In the third chamber 16, the wastewater flows from top to bottom to the through-hole 11, then through the through-hole 11 into the biological filter tank 3, and moves from bottom to top within the biological filter tank 3 to the drain outlet 31, thus achieving the treatment of the entire wastewater. The first partition 12 and the second partition 13 are installed in the anoxic tank 1, increasing the path the wastewater travels within the anoxic tank 1, thereby increasing the reaction time between the wastewater and the filter media in the anoxic tank 1 and improving the wastewater removal effect.

[0046] Furthermore, the household non-powered sewage treatment system also includes a backwashing assembly 5. The backwashing assembly 5 includes a first backwashing pipe 51, a second backwashing pipe 52, a third backwashing pipe 53, and a fourth backwashing pipe 54 connected in sequence. Each of the first, second, third, and fourth backwashing pipes has multiple backwashing ports. In a preferred embodiment, one end of the fourth backwashing pipe 54 is located outside the biological filter tank 3 and is connected to a water pump via a water pipe. The water pump supplies water for rinsing to the first, second, third, and fourth backwashing pipes 54 via the water pipe. The first backwashing pipe 51 is located at the bottom of the first chamber 14. Water in the first backwashing pipe 51 flows from bottom to top through the filter media, which is opposite to the flow direction of sewage within the first chamber 14, thus achieving the purpose of backwashing and rinsing the filter media. The second backwash pipe 52 is located at the top of the second chamber 15, the third backwash pipe 53 is located at the bottom of the third chamber 16, and the fourth backwash pipe 54 is located at the top of the biological filter tank 3. Similarly, the backwash water in the second chamber 15, the third chamber 16, and the biological filter tank 3 flows in the opposite direction to the corresponding wastewater, thereby achieving backwashing of the filter media. By setting the first backwash pipe 51, the second backwash pipe 52, the third backwash pipe 53, and the fourth backwash pipe 54 to achieve backwashing of the filter media, the service life of the filter media is improved, and the replacement frequency of the filter media is reduced.

[0047] Furthermore, a movable sealing gate is provided at the through hole 11 on the third chamber 16, which can block the through hole 11. The sealing gate can be manual or electric, for example, moved by a screw and nut to control the opening and closing of the through hole 11. During backwashing, the sealing gate is controlled to seal the through hole 11. During wastewater treatment, the through hole 11 is opened, allowing wastewater to flow from the third chamber 16 into the biological filter tank 3.

[0048] In a preferred embodiment, a first backwash outlet 17, a second backwash outlet 18, and a third backwash outlet 19 are respectively provided on the sidewalls of the first chamber 14, the second chamber 15, and the third chamber 16; a fourth backwash outlet 32 ​​is provided on the sidewall of the biological filter 3 near the bottom. The first backwash outlet 17 is located at the top of the anoxic tank 1, the second backwash outlet 18 is located at the bottom of the anoxic tank 1, and the third backwash outlet 19 is located at the top of the anoxic tank 1. During backwashing, the backwash water can flow out through the first backwash outlet 17, the second backwash outlet 18, the third backwash outlet 19, and the fourth backwash outlet 32.

[0049] On the other hand, the household non-powered sewage treatment system also includes a septic tank 6. The septic tank 6 is connected to the inlet of the anoxic tank, and the liquid in the septic tank can overflow into the return tank 2.

[0050] Septic tank 6 is a three-compartment septic tank. The first two compartments are used for secondary decomposition of sewage, and the last compartment 6 is used to store the decomposed sewage. The feces are fermented and decomposed in the tank to generate organic matter and humic acid and other nutrients. Pathogens and parasites are basically killed and used as fertilizer for vegetable gardens, etc. Excess decomposed fecal liquid overflows into the third chamber 16 through the last compartment 6.

[0051] In a preferred embodiment, the siphon assembly 4 further includes a guide cylinder 43. The guide cylinder 43 is located inside the anoxic tank 1 and is connected to the anoxic tank. The liquid in the anoxic tank 1 can enter the guide cylinder 43, and the liquid level in the guide cylinder is the same as and changes simultaneously with the liquid level in the anoxic tank. Specifically, the end face of the first end of the U-shaped siphon tube is positioned close to the top of the anoxic tank, and the first end of the U-shaped siphon tube 41 and the conical plug 42 are both located inside the guide cylinder 43. The conical plug 42 can move along the guide cylinder 43 to block or move away from the first end of the U-shaped siphon tube 41. The U-shaped siphon tube 41 is also provided with an inspection port, and an inspection pipe 44 is provided on the inspection port. A valve 45 is provided on the inspection pipe 44.

[0052] Finally, the biological filter 3 includes a rectangular pool 33 and a strip-shaped overflow trough 34 located near the top of the rectangular pool 33. The rectangular pool 33 is connected to the anoxic pool 1 through a through hole 11, and the fourth backwash pipe 54 and the fourth backwash outlet 32 ​​are both located inside the rectangular pool 33. The first end of the strip-shaped overflow trough 34 is connected to the rectangular pool 33, and a drain outlet 31 is provided at the second end of the strip-shaped overflow trough 34. The overflow outlet 21 is located near the second end of the strip-shaped overflow trough 34. By placing the overflow outlet 21 near the second end of the strip-shaped overflow trough 34, the flow path of the sewage is increased, the reaction time between the sewage and the filter media is increased, and the sewage treatment effect is improved. Both the rectangular pool 33 and the strip overflow trough 34 are equipped with filter media. The fourth backwash pipe 54 is located at the top of the rectangular pool 33. The strip overflow trough 34 does not need to be equipped with a backwash pipe because after the sewage passes through the first chamber 14, the second chamber 15, the third chamber 16 and the filter media in the rectangular pool 33, it will not be blocked when it passes through the filter media in the strip overflow trough 34. In addition, the filter media in the strip overflow trough 34 is to allow the sewage flowing into the return pool 2 to undergo some pretreatment.

[0053] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A household non-powered sewage treatment system, characterized in that, The household non-powered sewage treatment system includes: an anoxic tank (1), a return tank (2), a biological filter (3), and a siphon assembly (4). Both the anoxic pool (1) and the biofilter (3) are equipped with filter media. The anoxic pool (1) has a through hole (11) near the bottom that communicates with the biofilter (3). The biological filter tank (3) is provided with a drain outlet (31), and the wall of the return pool (2) is provided with an overflow outlet (21) that communicates with the biological filter tank (3). The height of the overflow outlet (21) is higher than the height of the drain outlet (31). The siphon assembly (4) includes a U-shaped siphon tube (41) and a conical plug (42). The first end of the U-shaped siphon tube (41) is located in the anoxic pool (1) through the inlet of the anoxic pool (1). The second end of the U-shaped siphon tube (41) is located in the reflux pool (2). The conical plug (42) is located at the first end of the U-shaped siphon tube (41). When the liquid level in the anoxic pool (1) is higher than a set value, the conical plug (42) can block the first end of the U-shaped siphon tube (41). When the liquid level in the anoxic pool (1) is lower than the set value, the conical plug (42) can move away from the first end of the U-shaped siphon tube (41). The household non-powered sewage treatment system also includes a septic tank (6). The septic tank is connected to the inlet of the anoxic tank (1), and the liquid in the septic tank can overflow into the anoxic tank (1). The siphon assembly (4) also includes a guide cylinder (43); the guide cylinder (43) is located inside the anoxic pool (1) and is connected to the anoxic pool (1); the first end of the U-shaped siphon tube (41) and the conical plug (42) are both located inside the guide cylinder (43); the conical plug (42) can move along the guide cylinder (43) and block or move away from the first end of the U-shaped siphon tube (41); The U-shaped siphon (41) is also provided with an inspection port, and an inspection pipe (44) is provided on the inspection port, and a valve (45) is provided on the inspection pipe (44).

2. The household non-powered sewage treatment system as described in claim 1, characterized in that, The anoxic pool (1) is provided with a first partition (12) and a second partition (13) arranged parallel to its own length direction. The first partition (12) and the second partition (13) can divide the anoxic pool (1) into a first cavity (14), a second cavity (15) and a third cavity (16). The second cavity (15) is located between the first cavity (14) and the third cavity (16). The bottom of the first cavity (14) is connected to the bottom of the second cavity (15), the top of the second cavity (15) is connected to the top of the third cavity (16), the through hole (11) is provided on the third cavity (16), and the through hole (11) is provided near the bottom of the third cavity (16), and the inlet of the anoxic pool (1) is provided at the top of the first cavity (14).

3. The household non-powered sewage treatment system as described in claim 2, characterized in that, The household non-powered sewage treatment system also includes: a backwashing component (5); The backwash assembly (5) includes a first backwash pipe (51), a second backwash pipe (52), a third backwash pipe (53) and a fourth backwash pipe (54) connected in sequence. Each of the first backwash pipe (51), the second backwash pipe (52), the third backwash pipe (53) and the fourth backwash pipe (54) is provided with a plurality of backwash ports. The first backwash pipe (51) is located at the bottom of the first cavity (14), the second backwash pipe (52) is located at the top of the second cavity (15), the third backwash pipe (53) is located at the bottom of the third cavity (16), and the fourth backwash pipe (54) is located at the top of the biofilter (3).

4. The household non-powered sewage treatment system as described in claim 3, characterized in that, The third cavity (16) is provided with a movable sealing door at the through hole (11), and the sealing door can block the through hole (11).

5. The household non-powered sewage treatment system as described in claim 3, characterized in that, The sidewalls of the first cavity (14), the second cavity (15), and the third cavity (16) are respectively provided with a first backwash outlet (17), a second backwash outlet (18), and a third backwash outlet (19); the sidewall of the biofilter (3) is provided with a fourth backwash outlet (32) near the bottom. The first backwash outlet (17) is located at the top of the anoxic tank (1), the second backwash outlet (18) is located at the bottom of the anoxic tank (1), and the third backwash outlet (19) is located at the top of the anoxic tank (1).

6. The household non-powered sewage treatment system as described in any one of claims 3-5, characterized in that, The biofilter (3) includes a rectangular pool (33) and a strip overflow trough (34) disposed near the top of the rectangular pool (33); The rectangular pool (33) is connected to the anoxic pool (1) through the through hole (11), and the fourth backwash pipe (54) and the fourth backwash outlet (32) are both located inside the rectangular pool (33); The first end of the strip overflow trough (34) is connected to the rectangular pool (33), and a drain outlet (31) is provided at the second end of the strip overflow trough (34), and the overflow outlet (21) is located near the second end of the strip overflow trough (34).

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