Biological decomposition device

Abstract

The embodiment of the utility model provides a biological decomposition device which comprises a decomposition box, and a matrix filter layer and a sewage discharge layer are sequentially arranged in the decomposition box from top to bottom in the vertical direction, so that sewage is filtered and separated; the matrix filter layer bears a medium and intercepts large particles, a habitat environment is provided for organisms in the matrix storage cavity for biological decomposition, decomposed sewage and small particles enter the sewage discharge layer, the small particles and sewage are discharged from the sewage discharge opening, and the rest of sewage enters the water discharge cavity through the sewage discharge layer and is discharged; according to the device, sewage is biologically decomposed through the matrix filter layer, and small particulate matters in the sewage are filtered through the sewage discharge layer, so that the culture sewage is treated, the sewage discharged from the water discharge cavity can be decomposed by microorganisms and absorbed and utilized by plants, and the water quality is purified for culture cyclic utilization.

Description

Technical Field

[0001] The present application relates to the technical field of aquaponics, and in particular, to a biodegradation device. Background Art

[0002] With the popularization of agricultural Internet of Things technology and the combination of pure organic farming and planting at this stage, more and more capital is pouring into the field of indoor planting and breeding with relatively high food safety, such as fish-vegetable symbiosis. Fish-vegetable symbiosis is a new type of compound farming system. It combines aquaculture and vegetable production, two originally completely different farming technologies, through ingenious ecological design to achieve scientific synergy and symbiosis, thereby achieving the ecological symbiosis effect of raising fish without changing water and worrying about water quality, and growing vegetables without fertilizing and growing normally. Achieving a harmonious ecological balance between animals, plants, and microorganisms is a sustainable, circular, zero-emission, low-carbon production model in the future, and it is also the most effective way to effectively solve the agricultural ecological crisis.

[0003] In the fish-vegetable symbiotic system, aquaculture wastewater is often discharged directly into the substrate cultivation or hydroponic plant planting system. Since particulate matter such as fish feces cannot be decomposed by microorganisms in time, they are easy to rot and breed bacteria and produce harmful gases, etc., which leads to diseases in the plant planting system and then affects the aquaculture system, forming a vicious cycle. In order to avoid this situation, it is necessary to conduct preliminary treatment of aquaculture wastewater so that the wastewater discharged into the plant planting system can be decomposed by microorganisms in time, absorbed and utilized by plants, and then purify the water quality for aquaculture recycling. Utility Model Content

[0004] In an embodiment of the present application, a biological decomposition device is provided to perform preliminary treatment on aquaculture wastewater so that the wastewater discharged into the plant planting system can be decomposed by microorganisms for absorption and utilization by plants.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A biological decomposition device comprises a decomposition box, wherein the inner cavity of the decomposition box has a matrix filter layer and a sewage discharge layer arranged in sequence from top to bottom vertically;

[0007] The matrix filter layer is used to carry the matrix and can filter large particles. The matrix filter layer and the inner wall of the decomposition box form a matrix storage cavity. The matrix storage cavity is used to hold decomposing organisms and is connected to a sewage source to perform biological decomposition on the sewage.

[0008] The drainage layer is used to filter small particles. A drainage cavity is formed between the drainage layer and the matrix filter layer. The drainage cavity is provided with a drainage port for discharging sewage containing small particles.

[0009] A drainage cavity is formed between the bottom wall of the decomposition box and the sewage layer, and the drainage cavity is used to collect and discharge the clean water filtered by the sewage layer.

[0010] Optionally, the sewage discharge layer extends in the longitudinal direction of the decomposition box and is arranged obliquely;

[0011] The sewage outlet is located on the inner wall of the decomposition box corresponding to the longitudinal bottom end of the sewage discharge layer, and penetrates the decomposition box along the wall thickness direction.

[0012] Optionally, the sewage layer is provided with a plurality of sewage filter screens spaced apart in the longitudinal direction.

[0013] Optionally, it also includes:

[0014] The flushing assembly includes a flushing pipe and a plurality of water sprayers. The flushing pipe is located on the outer wall of the decomposition box and extends longitudinally. Any of the water sprayers is located in the sewage cavity and extends transversely for flushing the sewage filter.

[0015] Optionally, the water sprayer and the sewage filter are arranged in a one-to-one correspondence;

[0016] The water sprinkler is fixed to the bottom wall of the matrix filter layer.

[0017] Optionally, a water inlet assembly is further included, which is located above the decomposition box and communicated with the matrix storage chamber; the water inlet assembly includes:

[0018] A water inlet pipe and a plurality of water dividers, wherein the water inlet pipe is located on the outer wall of the decomposition box and extends longitudinally; the water dividers are located on the inner top wall of the decomposition box and extend laterally, and any of the water dividers is connected to the water inlet pipe for discharging sewage into the matrix storage cavity.

[0019] Optionally, it also includes:

[0020] The siphon assembly is located on the bottom wall of the decomposition box and is used for discharging the clean water in the drainage cavity.

[0021] Optionally, the siphon assembly comprises:

[0022] A first sleeve is fixed in the drainage cavity, the top end of the first sleeve is a closed structure, and the bottom end is provided with a siphon liquid inlet, and the siphon liquid inlet is communicated with the drainage cavity;

[0023] A drain pipe is sleeved in the first sleeve, and a top water inlet of the drain pipe is spaced from the top wall of the first sleeve; a bottom water outlet of the drain pipe passes through and is located below the bottom wall of the decomposition box.

[0024] Optionally, the siphon assembly further comprises:

[0025] The second sleeve is sleeved on the outside of the first sleeve, and the inner diameter of the second sleeve is larger than the outer diameter of the first sleeve; the second sleeve is provided with filter mesh holes with a preset distance from bottom to top.

[0026] Optionally, a plurality of support frames are provided on the bottom wall of the first sleeve, and the support frames are arranged at intervals along the circumference of the bottom wall of the first sleeve, and the siphon liquid inlet is formed between adjacent support frames and the bottom wall of the first sleeve.

[0027] The biological decomposition device provided in the embodiment of the present application includes a decomposition box, the inner cavity of the decomposition box has a matrix filter layer and a sewage layer arranged in sequence from top to bottom along the vertical direction; the matrix filter layer is used to carry the matrix and can filter large particles, the matrix filter layer and the inner wall of the decomposition box form a matrix storage cavity, the matrix storage cavity is used to connect to a sewage source and biologically decompose the sewage; the sewage layer is used to filter small particles, a sewage cavity is formed between the sewage layer and the matrix filter layer, and the sewage cavity is provided with a sewage outlet for discharging sewage containing small particles to the outside; a drainage cavity is formed between the bottom wall of the decomposition box and the sewage layer, and the drainage cavity is used to collect and discharge clean water filtered by the sewage layer.

[0028] Compared with the prior art, the biodegradation device provided in the embodiment of the present application has the following technical effects:

[0029] In the present application, by arranging a matrix filter layer and a sewage discharge layer in sequence vertically from top to bottom in the decomposition box, the filtration and separation of sewage is achieved; the matrix filter layer carries the medium and intercepts large particles, and provides a habitat for organisms for biological decomposition in the matrix storage cavity. The decomposed sewage and small particles enter the sewage discharge layer, and the small particles and sewage are discharged from the sewage outlet. The remaining relatively clear sewage enters the drainage cavity through the sewage discharge layer and is discharged, so as to avoid small particles flowing into the plant planting system to block the matrix, greatly reduce the frequency of cleaning the matrix, and facilitate the reproduction and metabolism of microorganisms; the above-mentioned device biologically decomposes the sewage through the matrix filter layer, and filters the sewage for small particles through the sewage discharge layer, so as to achieve the treatment of aquaculture sewage, so that the sewage discharged from the drainage cavity can be decomposed by microorganisms for absorption and utilization by plants, thereby purifying the water quality for aquaculture recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 A schematic cross-sectional view of a biodegradation device provided in an embodiment of the present application;

[0032] Figure 2 for Figure 1 Schematic diagram of the external structure;

[0033] Figure 3 A schematic diagram of the structure of a siphon assembly provided in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of the exploded structure of the siphon assembly provided in an embodiment of the present application.

[0035] The following are marked in the accompanying drawings:

[0036] Biodegradation device 200;

[0037] Decomposition box 210, matrix filter layer 220, drainage layer 230, matrix storage chamber 240, drainage chamber 250, drainage chamber 260, siphon assembly 290;

[0038] Sewage outlet 231, sewage filter 232;

[0039] Water inlet pipe 271, water distributor 272;

[0040] Flushing pipe 281, sprinkler 282;

[0041] A first sleeve 291, a drain pipe 292, a second sleeve 293, a support frame 294, and a siphon liquid inlet 2911;

[0042] The water inlet 2921 is at the top and the water outlet 2922 is at the bottom. DETAILED DESCRIPTION

[0043] The embodiment of the utility model discloses a biological decomposition device, which can preliminarily treat aquaculture sewage and make the sewage discharged into the plant planting system be decomposed by microorganisms for absorption and utilization by plants.

[0044] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0045] See also Figure 1-4 , Figure 1 A schematic cross-sectional view of a biodegradation device provided in an embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the external structure; Figure 3 A schematic diagram of the structure of a siphon assembly provided in an embodiment of the present application; Figure 4 A schematic diagram of the exploded structure of the siphon assembly provided in an embodiment of the present application.

[0046] In a specific embodiment, the biological decomposition device 200 provided by the present application is applied to an aquaculture system or a fish-vegetable symbiotic system. The present application is illustrated by taking its application in a fish-vegetable symbiotic system as an example; it includes a decomposition box 210, the interior of which is a hollow cavity, the inner cavity of the decomposition box 210 has a matrix filter layer 220 and a sewage discharge layer 230, the matrix filter layer 220 and the sewage discharge layer 230 are arranged in sequence from top to bottom vertically, the matrix filter layer 220 is used to hold decomposing organisms, and is connected to a sewage source to biologically decompose sewage and filter large particles, the matrix filter layer 220 and the inner wall of the decomposition box 210 above form a matrix storage cavity 240, the matrix storage cavity 240 is used to carry a matrix and intercept particles such as fish feces, provide a habitat for earthworms in the matrix storage cavity 240 and can perform biological decomposition of particles such as fish feces, and the decomposed sewage and small particles leak into the lower sewage discharge layer 230. The substrate filter layer 220 is preferably a plate-like structure, and filter holes are arranged on the plate-like structure to intercept large particles. In other embodiments, the decomposing organisms can be microorganisms or other organisms capable of decomposing the substrate, and the specific biological species of the decomposing organisms can be set according to needs.

[0047] The inner wall of the sewage layer 230, the matrix filter layer 220 and the decomposition box 210 forms a sewage cavity 250, and the sewage cavity 250 is provided with a sewage outlet 231 that can discharge sewage with small particles outwardly. This part of sewage and small particles can be discharged from the decomposition device through the sewage cavity 250, and other decomposition or fermentation devices are used for treatment. The sewage outlet 231 is preferably located at the bottom of the sewage cavity 250, and is arranged through the inner wall of the decomposition box 210 to achieve communication with the external pipeline. The sewage layer 230 is also provided with a filter hole, and the mesh number of the filter hole of the sewage layer 230 is less than the mesh number of the filter hole of the matrix filter layer 220. The sewage layer 230 can also be set to a plate-like structure, and a filter hole is arranged on the plate-like structure to facilitate the interception of small particles. It is preferred that the circumferential edges of the matrix filter layer 220 and the sewage layer 230 are fixed to the inner wall of the decomposition box 210 to achieve the separation of the upper and lower layers.

[0048] The sewage after filtering small particles through the sewage discharge layer 230 enters the drainage cavity 260 and is discharged from the decomposition box 210 through the drainage cavity 260. Similarly, a drainage port can be set in the drainage cavity 260 to realize sewage discharge.

[0049] Compared with the prior art, the biodegradation device 200 provided in the embodiment of the present application has the following technical effects:

[0050] In the present application, the filtration and separation of sewage is achieved by vertically arranging a matrix filter layer 220 and a sewage discharge layer 230 in sequence from top to bottom in the decomposition box 210; the matrix filter layer 220 carries the medium and intercepts large particles, and provides a habitat for organisms through the matrix storage chamber 240 for biological decomposition, and the decomposed sewage and small particles enter the sewage discharge layer 230, and the small particles and sewage are discharged from the sewage outlet 231, and the remaining sewage enters the drainage chamber 260 through the sewage discharge layer 230 and is discharged; the above-mentioned device biologically decomposes the sewage through the matrix filter layer 220, and filters the sewage for small particles through the sewage discharge layer 230, so as to achieve the treatment of aquaculture sewage, so that the sewage discharged from the drainage chamber 260 can be decomposed by microorganisms for absorption and utilization by plants, thereby purifying the water quality for aquaculture recycling.

[0051] In this embodiment, the drainage layer 230 extends longitudinally along the decomposition box 210 and is inclined, and the drainage layer 230 is inclined at a preset angle with the horizontal plane, such as 15°-45°; the drainage port 231 is located on the inner wall of the decomposition box 210 corresponding to the longitudinal bottom end of the drainage layer 230, and penetrates the decomposition box 210 along the wall thickness direction, so that the sewage is discharged from the device through the inclined drainage layer 230, avoiding small particles from flowing into the plant planting device and clogging it, and reducing the frequency of cleaning the substrate. Preferably, the drainage layer 230 is provided with a plurality of drainage filters 232 at intervals along the longitudinal direction.

[0052] In order to better discharge sewage and small particles, the above-mentioned device also includes a flushing component, which includes a flushing pipe 281 and a plurality of water sprinklers 282, and the flushing pipe 281 is connected to each water sprinkler 282; the flushing pipe 281 is located on the outer wall of the decomposition box 210 and extends longitudinally, and any water sprinkler 282 is located in the sewage chamber 250 and extends laterally, which is used to flush the sewage filter 232.

[0053] The flushing pipe 281 is fixed to the outer wall of the decomposition box 210 and extends longitudinally; each water sprinkler 282 is located in the sewage chamber 250 and extends laterally. The water sprinkler 282 is preferably arranged above the sewage chamber 250, specifically fixed to the lower surface of the matrix filter layer 220, to flush the sewage layer 230 below, and discharge the sewage and small particles from the sewage chamber 250 through the turbulent state formed by the water flow.

[0054] Furthermore, the water sprayer 282 is arranged in a one-to-one correspondence with the sewage filter 232 to prevent particulate matter or impurities from clogging the sewage filter 232, so that sewage can enter the drainage cavity 260 through the sewage filter 232; the water sprayer 282 is fixed to the bottom wall of the matrix filter layer 220, and the spraying direction is toward the sewage outlet 231 side, so as to further facilitate the sewage to flow out of the sewage outlet 231 from the sewage layer 230 from top to bottom.

[0055] In this embodiment, the device further comprises a water inlet assembly, which is located above the decomposition box 210 and communicates with the matrix storage chamber 240; the water inlet assembly comprises:

[0056] A water inlet pipe 271 and several water dividers 272, the water inlet pipe 271 is located on the outer wall of the decomposition box 210 and extends longitudinally; the water dividers 272 are located on the inner top wall of the decomposition box 210 and extend laterally, and any water divider 272 is connected to the water inlet pipe 271 for discharging sewage into the matrix storage chamber 240.

[0057] The water inlet pipe 271 is fixed to the outer wall of the decomposition box 210 and extends in the longitudinal direction; each water distributor 272 is connected to the water inlet pipe 271, and the water distributor 272 is located in the matrix storage chamber 240, preferably fixed to the inner top wall of the decomposition box 210 and extends in the transverse direction; sewage enters the matrix storage chamber 240 through the water inlet pipe 271 and the water distributor 272. Preferably, a water inlet control valve is provided on the water inlet pipe 271 to control the on-off of the pipeline.

[0058] like Figure 3 , 4 As shown, in another embodiment, in order to discharge the clean water in the drainage cavity 260, the above-mentioned decomposition device includes a siphon assembly 290, which is located on the bottom wall of the decomposition box 210. The siphon assembly 290 includes a first sleeve 291, which is fixed in the drainage cavity 260. The top of the first sleeve 291 is a closed structure, and the bottom has an opening and a siphon liquid inlet 2911. The drainage pipe 292 is set with the first sleeve 291 through the bottom opening, and the siphon liquid inlet 2911 is connected to the drainage cavity 260;

[0059] The drain pipe 292 is sleeved in the first sleeve 291 , and a gap is provided between the top water inlet 2921 of the drain pipe 292 and the top wall of the first sleeve 291 ; the bottom water outlet 2922 of the drain pipe 292 passes through and is located below the bottom wall of the decomposition box 210 .

[0060] The outer diameter of the drain pipe 292 is smaller than the inner diameter of the first sleeve 291, so that a gap is formed between the outer wall of the drain pipe 292 and the inner wall of the first sleeve 291 for storing water. A gap is provided between the top water inlet 2921 of the drain pipe 292 and the top wall of the inner cavity of the first sleeve 291, and the bottom water outlet 2922 of the drain pipe 292 penetrates the bottom wall of the decomposition box 210 to discharge clean water out of the biological decomposition box 210. The drain pipe 292 is set to be L-shaped to facilitate vacuum maintenance. At the same time, the siphon assembly 290 can ensure the water level of the drainage chamber 260 and the entire biological decomposition device 200, so that the substrate storage chamber 240 above is in a semi-dry and semi-wet environment, which is convenient for the survival of earthworms.

[0061] The siphon assembly 290 also includes a second sleeve 293, which is sleeved on the outside of the first sleeve 291, and the inner diameter of the second sleeve 293 is larger than the outer diameter of the first sleeve 291; the second sleeve 293 is provided with filter mesh holes of a preset distance from bottom to top to filter the sewage entering the first sleeve 291.

[0062] Specifically, a plurality of support frames 294 are provided on the bottom wall of the first sleeve 291 . The support frames 294 are arranged at intervals along the circumference of the bottom wall of the first sleeve 291 , and a siphon liquid inlet 2911 is formed between adjacent support frames 294 and the bottom wall of the first sleeve 291 .

[0063] The sewage in the drainage chamber 260 enters the gap between the outer wall of the drainage pipe 292 and the inner wall of the first sleeve 291 through the siphon inlet 2911. When the water level reaches the top water inlet 2921 of the drainage pipe 292, negative pressure is formed to attract the sewage to continuously and rapidly flow out of the drainage chamber 260 through the top water inlet 2921 of the drainage pipe 292 until the liquid level in the drainage chamber 260 drops to the upper surface of the siphon inlet 2911, the negative pressure effect disappears, and the siphon effect stops, thereby achieving rapid discharge of liquid from the drainage chamber 260 without any additional power, which is economical and environmentally friendly.

[0064] The specific working process is: the aquaculture sewage containing particles such as fish feces flows into the substrate above the substrate filter layer 220 through the water inlet pipe 271 through the water divider 272, the particles such as fish feces are intercepted and filtered by the substrate, and the earthworms biologically decompose the particles such as fish feces in the substrate layer. The decomposed nutrients and small particles and the clearer liquid of the aquaculture sewage leak into the sewage layer 230 through the gaps in the substrate and the substrate filter layer 220. The clean water is flushed by the flushing pipe 281 through the sprinkler 282 at a certain pressure flow rate, and the clean water leaks down from the filter screen and flows into the drainage cavity 260, and the sewage with small particles is discharged from the sewage outlet 231. Clearer liquid accumulates in the drainage chamber 260, and the water flow between the pores of the second sleeve 293 and the first sleeve 291 can rise from the drainage chamber 260 along the gap between the second sleeve 293 and the first sleeve 291. When the water level in the drainage chamber 260 reaches the water inlet 2921 at the top of the drain pipe 292, negative pressure is eventually formed to attract sewage to continuously and rapidly flow out of the drainage chamber 260 from the water inlet 2921 at the top of the drain pipe 292 until the liquid level in the drainage chamber 260 reaches the upper end position of the three support frames 294, the negative pressure effect disappears, and the siphon effect stops, thereby achieving rapid discharge of liquid from the drainage chamber 260 for subsequent plant absorption and utilization.

[0065] The above-mentioned device intercepts and separates sewage containing particles such as fish feces through the matrix filter layer 220, and controls the water level through the siphon component 290 to maintain a gradually dry and wet environment, thereby promoting earthworms to decompose particles such as fish feces; particles such as fish feces are decomposed by earthworms, and some nutrients are integrated into the water, as well as elemental substances such as ammonia nitrogen in the aquaculture sewage, which flow into the drainage cavity 260 through the sewage filter 232. Particulate matter such as earthworm feces is discharged from the fish-vegetable symbiosis system through the sewage layer 230 with a slope, so as to avoid fine particles from flowing into the plant planting system to block the matrix, greatly reduce the frequency of cleaning the matrix, and facilitate the reproduction and metabolism of microorganisms; when the water level in the drainage cavity 260 reaches the expected height, the siphon component 290 discharges the clean water containing nutrients into the plant planting system by siphoning, thereby providing water and nutrients for the plants.

[0066] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0067] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A biodegradation device, characterized in that: It comprises a decomposition box, wherein the inner cavity of the decomposition box has a matrix filter layer and a sewage discharge layer arranged in sequence from top to bottom vertically; The matrix filter layer is used to carry the matrix and can filter large particles. The matrix filter layer and the inner wall of the decomposition box form a matrix storage cavity. The matrix storage cavity is used to hold decomposing organisms and is connected to a sewage source to perform biological decomposition on the sewage. The drainage layer is used to filter small particles. A drainage cavity is formed between the drainage layer and the matrix filter layer. The drainage cavity is provided with a drainage port for discharging sewage containing small particles. A drainage cavity is formed between the bottom wall of the decomposition box and the sewage layer, and the drainage cavity is used to collect and discharge the clean water filtered by the sewage layer.

2. The biodegradation device according to claim 1, characterized in that: The sewage discharge layer extends in the longitudinal direction of the decomposition box and is arranged obliquely; The sewage outlet is located on the inner wall of the decomposition box corresponding to the longitudinal bottom end of the sewage discharge layer, and penetrates the decomposition box along the wall thickness direction.

3. The biodegradation device according to claim 2, characterized in that: The sewage discharge layer is provided with a plurality of sewage discharge filter screens at intervals along the longitudinal direction.

4. The biodegradation device according to claim 3, characterized in that: Also includes: The flushing assembly includes a flushing pipe and a plurality of water sprayers. The flushing pipe is located on the outer wall of the decomposition box and extends longitudinally. Any of the water sprayers is located in the sewage cavity and extends transversely for flushing the sewage filter.

5. The biodegradation device according to claim 4, characterized in that: The water sprayer and the sewage filter are arranged in one-to-one correspondence; The water sprinkler is fixed to the bottom wall of the matrix filter layer.

6. The biodegradation device according to claim 1, characterized in that: It also includes a water inlet assembly, which is located above the decomposition box and communicates with the matrix storage chamber; the water inlet assembly includes: A water inlet pipe and a plurality of water dividers, wherein the water inlet pipe is located on the outer wall of the decomposition box and extends longitudinally; the water dividers are located on the inner top wall of the decomposition box and extend laterally, and any of the water dividers is connected to the water inlet pipe for discharging sewage into the matrix storage cavity.

7. The biodegradation device according to claim 1, characterized in that: Also includes: The siphon assembly is located on the bottom wall of the decomposition box and is used for discharging the clean water in the drainage cavity.

8. The biodegradation device according to claim 7, characterized in that: The siphon assembly comprises: A first sleeve is fixed in the drainage cavity, the top end of the first sleeve is a closed structure, and the bottom end is provided with a siphon liquid inlet, and the siphon liquid inlet is communicated with the drainage cavity; A drain pipe is sleeved in the first sleeve, and a top water inlet of the drain pipe is spaced from the top wall of the first sleeve; a bottom water outlet of the drain pipe passes through and is located below the bottom wall of the decomposition box.

9. The biodegradation device according to claim 8, characterized in that: The siphon assembly further comprises: The second sleeve is sleeved on the outside of the first sleeve, and the inner diameter of the second sleeve is larger than the outer diameter of the first sleeve; the second sleeve is provided with filter mesh holes with a preset distance from bottom to top.

10. The biodegradation device according to claim 8, characterized in that: The bottom wall of the first sleeve is provided with a plurality of support frames, each of which is arranged at intervals along the circumference of the bottom wall of the first sleeve, and the siphon liquid inlet is formed between adjacent support frames and the bottom wall of the first sleeve.

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