Tidal flow sewage treatment system

Abstract

The utility model relates to a tidal flow sewage treatment system which is provided with an advection wetland, a water inlet pipe is arranged at an inlet end, and sewage is periodically input into the advection wetland through the water inlet pipe; the water storage tank is connected with the outlet end of the advection wetland through a first water conveying pipe, and a drainage pipe is arranged in the water storage tank; the outlet end of the vertical flow wetland is communicated with the inlet end of the horizontal flow wetland through a water outlet pipe, a second water conveying pipe is arranged at the inlet end of the vertical flow wetland, a submersible pump is installed at the end of the second water conveying pipe, and the submersible pump is arranged in the water storage tank; the submersible pump can be used for conveying sewage in the water storage tank into the vertical flow wetland through the second water conveying pipe. Thus, in one cycle, sewage flows into the water storage tank after being treated by the advection wetland, environmental circulation in the advection wetland is realized, a tidal wetland is constructed, the sewage treatment efficiency is improved, the sewage in the water storage tank is pumped and drained into the vertical flow wetland, and the treated sewage flows into the advection wetland through the water outlet pipe to be treated until the sewage meets the discharge requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tidal flow sewage treatment system. BACKGROUND

[0002] Constructed wetland is a kind of sewage ecological treatment system, which is composed of shallow water system planting aquatic plants, mainly relying on natural biological, physical and chemical processes to realize sewage purification, including engineering structure for controlling flow direction, liquid residence time and water level. The existing constructed wetland includes horizontal flow constructed wetland, subsurface flow constructed wetland, vertical subsurface flow constructed wetland, horizontal subsurface flow constructed wetland, ditch type constructed wetland, etc., among which horizontal flow constructed wetland, subsurface flow constructed wetland and vertical subsurface flow constructed wetland are mainly used. The conventional constructed wetland realizes water purification by filling purification matrix at the bottom and configuring plants at the upper part.

[0003] At present, most of the wetlands, whether using horizontal flow constructed wetland, subsurface flow constructed wetland or vertical subsurface flow constructed wetland, have the problem that the wetland matrix is soaked in water for a long time and is in an anaerobic environment. On the one hand, suspended particulate matter produced by microorganisms in the process of treating sewage can easily cause the wetland matrix to be blocked, and on the other hand, aerobic microorganisms are concentrated on the surface layer of the wetland, and there is a lack of aerobic microorganisms in the deep layer of the wetland, which leads to poor treatment efficiency of the wetland for sewage. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a tidal flow sewage treatment system to solve the above technical field.

[0005] The technical scheme adopted by the utility model is as follows: a tidal flow sewage treatment system has:

[0006] The horizontal flow wetland is arranged with a water inlet pipe at the inlet end, and the horizontal flow wetland is periodically inputted with sewage through the water inlet pipe;

[0007] The water storage tank is connected with the outlet end of the horizontal flow wetland through the first water inlet pipe, and the water storage tank is provided with a drain pipe for discharging sewage in the water storage tank;

[0008] The vertical flow wetland is communicated with the horizontal flow wetland through the water outlet pipe at the outlet end of the vertical flow wetland, and the second water conveying pipe is arranged at the inlet end of the vertical flow wetland, and the end of the second water conveying pipe is provided with a submersible pump arranged in the water storage tank. The submersible pump can transport the sewage in the water storage tank that does not meet the discharge requirements to the vertical flow wetland through the second water conveying pipe when the horizontal flow wetland is in the "oxygen-rich" state. In this way, after the sewage flows into the horizontal flow wetland through the water inlet pipe, the horizontal flow wetland processes the sewage, and after the sewage is processed in the horizontal flow wetland, the sewage flows into the water storage tank through the first water conveying pipe. After the sewage is input into the horizontal flow wetland through the water inlet pipe in a cycle and the sewage is processed in the horizontal flow wetland, the "filling-emptying-filling" circulation process of the sewage in the horizontal flow wetland is realized to construct a tidal wetland, so that the horizontal flow wetland is in an "anaerobic-oxygen-rich-anaerobic" alternating environment, the sewage treatment efficiency is improved, and the treated sewage in the water storage tank can be discharged through the drain pipe if it meets the discharge requirements. If the sewage does not meet the discharge requirements, the submersible pump will pump the sewage in the water storage tank to the vertical flow wetland, so that when the sewage in the horizontal flow wetland is in the "emptying" state, the sewage flows into the vertical flow wetland and is processed, and after the sewage is processed by the vertical flow wetland, the sewage flows into the horizontal flow wetland through the water outlet pipe and is processed again until it meets the discharge requirements.

[0009] The vertical flow wetland has a water storage pool, the substrate is filled in the water storage pool, and plants are planted on the substrate. The inlet end of the vertical flow wetland is higher than the outlet end of the vertical flow wetland. In this way, after the sewage flows into the water storage pool through the second water conveying pipe, the plants planted on the substrate can process the sewage.

[0010] The horizontal flow wetland is filled with a substrate, and plants are planted on the substrate. The inlet end of the horizontal flow wetland is higher than the outlet end of the horizontal flow wetland. In this way, after the sewage flows into the horizontal flow wetland, the plants planted on the substrate can process the sewage, and under the action of the slope-shaped horizontal flow wetland, the sewage in the horizontal flow wetland flows from the inlet end to the outlet end.

[0011] Coconut fiber mats are laid on the substrate. The coconut fiber mats can provide a living place for plant root bacteria and microorganisms and can block the odor in the sewage treatment process.

[0012] The material of the substrate is ceramic particles fired by expanded shale.

[0013] The number of the vertical flow wetlands is at least one, and the vertical flow wetlands are arranged in parallel.

[0014] The first distribution pipe and the second distribution pipe are arranged at the inlet end of the horizontal flow wetland, the first distribution pipe is connected with the water inlet pipe, and the second distribution pipe is connected with the water outlet pipe of each vertical flow wetland.

[0015] The water outlet pipe is a siphon type water outlet pipe, so that the sewage in the vertical flow wetland can flow to the horizontal flow wetland.

[0016] The utility model discloses a kind of tidal wetlands, comprising horizontal flow wetland, water storage tank, vertical flow wetland, water inlet pipe, first water pipe, drain pipe, water outlet pipe, second water pipe and submersible pump, water storage tank is connected with the water outlet pipe of horizontal flow wetland, and the water inlet pipe of vertical flow wetland is connected with the water outlet pipe of horizontal flow wetland. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The plane schematic view of the utility model.

[0018] Figure 2 The structure schematic view of the utility model.

[0019] In the drawing: 1, horizontal flow wetland; 2, water storage tank; 3, vertical flow wetland; 4, water inlet pipe; 5, first water pipe; 6, drain pipe; 7, water outlet pipe; 8, second water pipe; 9, submersible pump; 10, water storage pool; 11, substrate; 12, plant; 13, coconut fiber pad; 14, first distribution pipe; 15, second distribution pipe. DETAILED DESCRIPTION

[0020] The utility model will be further explained in detail in combination with the drawings and through the embodiments. The following embodiments are the explanation of the utility model and the utility model is not limited to the following embodiments.

[0021] The embodiment is a tidal flow sewage treatment system, which has a horizontal flow wetland 1, the horizontal flow wetland 1 is filled with a substrate 11, plants 12 capable of treating sewage are planted on the substrate 11, the inlet end of the horizontal flow wetland 1 is higher than the outlet end of the horizontal flow wetland 1, so that after the sewage is input into the horizontal flow wetland 1 through the inlet end of the horizontal flow wetland 1, the sewage in the horizontal flow wetland 1 flows to the outlet end.

[0022] In the embodiment, a water inlet pipe 4 is connected to the inlet end of the horizontal flow wetland 1, and the sewage can be periodically input into the horizontal flow wetland 1 through the water inlet pipe 4. When the sewage is input into the horizontal flow wetland 1, the sewage in the horizontal flow wetland 1 is in a "filling" state, the horizontal flow wetland 1 is in an "anaerobic" environment, and the plants 12 planted in the horizontal flow wetland 1 can treat the sewage; when the sewage is not input into the horizontal flow wetland 1 and the sewage in the horizontal flow wetland 1 is discharged, the sewage in the horizontal flow wetland 1 is in a "emptying" state, the horizontal flow wetland 1 is in an "oxygen-rich" environment, which is conducive to the growth of the plants 12 in the horizontal flow wetland 1, and by periodically inputting the sewage into the horizontal flow wetland 1, a "filling-emptying-filling" cycle process of the sewage in the horizontal flow wetland 1 is realized to construct a tidal wetland, so that the horizontal flow wetland 1 is in an "anaerobic-oxygen-rich-anaerobic" alternating environment, and the sewage treatment efficiency is improved.

[0023] In the embodiment, a first distribution pipe 14 is arranged at the inlet end of the horizontal flow wetland 1, and the water inlet pipe 4 is connected to the first distribution pipe 14. In this way, the sewage can flow uniformly into the horizontal flow wetland 1 after flowing into the first distribution pipe 14 through the water inlet pipe 4.

[0024] In the embodiment, the first water inlet pipe 5 is connected to the water storage tank 2 at the outlet end of the horizontal flow wetland 1, a drain pipe 6 capable of discharging the sewage in the water storage tank 2 is arranged in the water storage tank 2, so that the sewage treated by the horizontal flow wetland 1 flows into the water storage tank 2. The sewage in the water storage tank 2 is detected, and when the sewage in the water storage tank 2 meets the discharge requirements, the sewage in the water storage tank 2 can be discharged through the drain pipe 6.

[0025] In this embodiment, the vertical flow wetland 3 is provided, and the outlet end of the vertical flow wetland 3 is communicated with the inlet end of the horizontal flow wetland 1 through the outlet pipe 7. The second water pipe 8 is arranged at the inlet end of the vertical flow wetland 3, and the end of the second water pipe 8 is provided with a submersible pump 9. The submersible pump 9 is arranged in the water storage tank 2. When the horizontal flow wetland 1 is in the "oxygen-rich" state, the submersible pump 9 can transport the sewage in the water storage tank 2 that does not meet the discharge requirements to the vertical flow wetland 3 through the second water pipe 8. The vertical flow wetland 3 has a water storage pool 10, and the water storage pool 10 is filled with a substrate 11. The plants 12 are planted on the substrate 11. The inlet end of the vertical flow wetland 3 is higher than the outlet end of the vertical flow wetland 3. The inlet end of the vertical flow wetland 3 is arranged at the top of the water storage pool 10, and the outlet end of the vertical flow wetland 3 is arranged at the bottom of the water storage pool 10. After the sewage passes through the inlet end of the vertical flow wetland 3, the sewage penetrates through the substrate 11 from top to bottom and flows out from the outlet end of the vertical flow wetland 3. In this way, when the sewage in the water storage tank 2 does not meet the discharge requirements, the sewage in the water storage tank 2 can be input into the vertical flow wetland 3 through the second water pipe 8 by the submersible pump 9. The sewage is treated by the plants 12 in the vertical flow wetland 3. The sewage treated by the vertical flow wetland 3 flows into the horizontal flow wetland 1 through the second water pipe 8 for treatment. When the sewage in the horizontal flow wetland 1 is in the "empty state", the sewage is discharged into the vertical flow wetland 3 for treatment. The sewage treated by the vertical flow wetland 3 is periodically discharged into the horizontal flow wetland 1 through the outlet pipe 7 and the inlet pipe 4. When the sewage in the horizontal flow wetland 1 is in the filling state, the sewage in the vertical flow wetland 3 is in the empty state. When the sewage in the horizontal flow wetland 1 is in the empty state, the sewage in the vertical flow wetland 3 is in the filling state. The vertical flow wetland 3 realizes the synchronous "oxygen-rich-oxygen-lacking-oxygen-rich" cycle in the "oxygen-lacking-oxygen-rich-oxygen-lacking" cycle process of the horizontal flow wetland 1, thereby improving the sewage treatment efficiency.

[0026] In this embodiment, the thickness of the substrate 13 of the water storage pool 10 in the vertical flow wetland 3 is less than or equal to 1.5 m. When the thickness is greater than 1.5 m, the economy is poor. The difference 26 between the depth from the top of the water storage pool 10 to the bottom of the substrate and the thickness of the substrate 13 is usually less than or equal to 0.6 m, which can allow the sewage to form a free water surface on the surface of the substrate 13 in the water storage pool 10.

[0027] In this embodiment, the coconut shell fiber mat 13 is laid on the substrate 11 of the horizontal flow wetland 1 and the vertical flow wetland 3. The coconut shell fiber mat 13 can provide a living place for bacteria and microorganisms in the roots of the plants 12, and can also block the odor in the sewage treatment process.

[0028] In this embodiment, the material of the substrate 11 is ceramic particles fired by expanded shale, and the diameter of the ceramic particles is about 4 mm. The expanded shale has the advantage of low bulk density, which is beneficial to the penetration of the plant roots 12.

[0029] In the embodiment, the number of the vertical flow wetlands 3 is at least one, and the vertical flow wetlands 3 are arranged in parallel. In this way, the number of the vertical flow wetlands 3 can be increased or decreased according to the actual situation, so that the vertical flow wetlands 3 can be used in cooperation with the horizontal flow wetland 1.

[0030] In the embodiment, the second distribution pipe 15 is arranged at the inlet end of the horizontal flow wetland 1, and the second distribution pipe 15 is connected with the water outlet pipe 7 of each vertical flow wetland 3. In this way, the sewage in the vertical flow wetland 3 flows into the second distribution pipe 15 through the water outlet pipe 7, and the sewage can be uniformly discharged into the horizontal flow wetland 1 through the second distribution pipe 15.

[0031] In the embodiment, the water outlet pipe 7 is a siphon type water outlet pipe 7, so as to accelerate the emptying speed of the water in the vertical flow wetland 3. The discharge period of the sewage in the vertical flow wetland 3 is consistent with the input period of the sewage in the water inlet pipe 4, and the time interval between the filling and the emptying of the sewage in the vertical flow wetland 3 is at least 12 h. The sewage flowing into the horizontal flow wetland 1 through the second distribution pipe 15 after being treated by the horizontal flow wetland 1 and the vertical flow wetland 3 is mixed with the sewage flowing into the horizontal flow wetland 1 through the water inlet pipe 4 and the first distribution pipe 14, so as to effectively reduce the concentration of the original sewage flowing into the horizontal flow wetland 1 through the water inlet pipe 4, and facilitate the treatment of the sewage by the horizontal flow wetland 1.

[0032] The above merely describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, and all of the above should be covered within the protection scope of the present application.

Claims

1. A tidal flow sewage treatment system, characterized in that: have: The advection wetland (1) has an inlet pipe (4) at its inlet end, through which sewage is periodically fed into the advection wetland (1). The water storage tank (2) is connected to the outlet end of the advection wetland (1) through the first water supply pipe (5). The water storage tank (2) is equipped with a drain pipe (6) that can discharge the sewage in the water storage tank (2). The vertical flow wetland (3) is connected to the inlet of the horizontal flow wetland (1) through the outlet pipe (7). A second water supply pipe (8) is installed at the inlet of the vertical flow wetland (3). A submersible pump (9) is installed at the end of the second water supply pipe (8). The submersible pump (9) is arranged in the water storage tank (2). When the horizontal flow wetland (1) is in an "oxygen-rich" state, the submersible pump (9) can transport the sewage in the water storage tank (2) that does not meet the discharge requirements to the vertical flow wetland (3) through the second water supply pipe (8).

2. The tidal flow sewage treatment system according to claim 1, characterized in that: The vertical flow wetland (3) has a water storage tank (10), which is filled with a substrate (11) and planted with plants (12) on the substrate (11). The inlet end of the vertical flow wetland (3) is higher than the outlet end of the vertical flow wetland (3).

3. The tidal flow sewage treatment system according to claim 1, characterized in that: The advection wetland (1) is filled with a substrate (11), and plants (12) are planted on the substrate (11). The inlet end of the advection wetland (1) is higher than the outlet end of the advection wetland (1).

4. The tidal flow sewage treatment system according to claim 2 or 3, characterized in that: A coconut fiber mat (13) is laid on the substrate (11).

5. The tidal flow sewage treatment system according to claim 2 or 3, characterized in that: The matrix (11) is made of ceramic particles fired from expanded shale.

6. The tidal flow sewage treatment system according to claim 1, characterized in that: The number of vertical flow wetlands (3) is at least one, and the vertical flow wetlands (3) are arranged in parallel.

7. The tidal flow sewage treatment system according to claim 6, characterized in that: A first distribution pipe (14) and a second distribution pipe (15) are installed at the inlet end of the advection wetland (1). The first distribution pipe (14) is connected to the inlet pipe (4), and the second distribution pipe (15) is connected to the outlet pipe (7) of each vertical flow wetland (3).

8. The tidal flow sewage treatment system according to claim 1, characterized in that: The water outlet pipe (7) is a siphon-type water outlet pipe (7).

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