A fish-vegetable symbiotic system and sewage treatment method thereof

Abstract

In an embodiment of the present application, a fish-vegetable symbiosis system and a sewage treatment method thereof are provided, wherein the aquaculture sewage is precipitated through a vertical flow separator to obtain a primary water body and a secondary water body containing large particles; the fish feces separation equipment horizontally precipitates the primary water body to obtain a tertiary water body and a quaternary water body, and the tertiary water body is discharged into an ecological planting bed; the fermentation equipment ferments the secondary water body and the quaternary water body, and discharges the fermented water body into the ecological planting bed; the sewage from aquatic organisms is treated through a vertical flow separator, a fish feces separation equipment, and a fermentation equipment, and then enters the ecological planting bed to provide water and nutrients for the plants. The fermented water body is rich in nutrients that are easily absorbed and utilized by plants, and the water body purified by the ecological planting bed enters the aquaculture equipment again to provide water for aquatic organisms, thereby realizing the recycling of water bodies; the fermentation equipment can filter and ferment large particles such as fish feces, so that they are decomposed into nutrients that can be absorbed by plants.

Description

Technical Field

[0001] The present application relates to the technical field of fish-vegetable symbiosis, and in particular, to a fish-vegetable symbiosis system and a sewage treatment method thereof. 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] The fish-vegetable symbiosis system is a popular system combining farming and breeding. The wastewater produced by aquaculture contains nutrients. After being treated by equipment and microbial water, its nutrients are absorbed and utilized by plants, thereby purifying the water quality and then flowing into the breeding pond for recycling, which is ecological and environmentally friendly. However, there are also some problems with the existing fish-vegetable symbiosis system. The fish feces and residual bait in the aquaculture wastewater are not treated thoroughly, which can easily clog and pollute the planting beds on the one hand, and the plants cannot obtain sufficient nutrients on the other hand. Summary of the invention

[0004] The embodiments of the present application provide a fish-vegetable symbiosis system and a wastewater treatment method thereof to solve the problems of incomplete treatment of fish feces and residual bait in existing fish-vegetable symbiosis systems, and easy clogging and pollution of planting beds.

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

[0006] The sewage treatment method of the fish-vegetable symbiosis system provided in an embodiment of the present application comprises: vertically settling particles of aquaculture sewage through a vertical flow separator to obtain a primary water body located above the vertical flow separator and a secondary water body located below the vertical flow separator and containing large particles; horizontally settling the primary water body through a fish feces separation device to obtain a filtered tertiary water body and a quaternary water body containing particles, and the tertiary water body is discharged into an ecological planting bed; fermenting the secondary water body and the quaternary water body through a fermentation device, and discharging the fermented water body into the ecological planting bed.

[0007] The present application also provides a fish-vegetable symbiosis system using the sewage treatment method described in any one of the above embodiments, comprising:

[0008] Farming equipment for farming aquatic organisms;

[0009] A vertical flow separator, connected to the aquaculture equipment, for vertically settling aquaculture wastewater;

[0010] A fish manure separation device is connected to the vertical flow separator, comprising a fish manure cutting assembly and a fish manure separation box with an inner cavity, wherein the inner cavity of the fish manure separation box is longitudinally arranged with a plurality of partitions, and the end walls at both ends of the fish manure separation box are respectively provided with a water inlet and a drain outlet, the water inlet of the fish manure separation box is connected to the vertical flow separator, and sedimentation chambers are respectively formed between adjacent partitions and between the partitions and the end walls of the fish manure separation box for sedimentation and separation of fish manure; a sewage outlet is provided on the bottom wall of the fish manure separation box corresponding to any of the sedimentation chambers for discharging settled fish manure; the fish manure cutting assembly is arranged opposite to the water inlet for cutting fish manure;

[0011] A fermentation device, comprising a fermentation box, a liquid inlet device and a liquid discharge device; the inner cavity of the fermentation box is provided with a filtering device for filtering the water entering the fermentation box; the liquid inlet device is respectively connected to the sewage outlets of the vertical flow separator and the fish feces separation box, and the liquid inlet device is arranged opposite to the filtering device; the liquid discharge device is connected to the bottom of the fermentation box, and is used to discharge the water filtered by the filtering device;

[0012] The ecological planting bed is respectively connected to the drainage outlet of the fish excrement separation equipment and the drainage device of the fermentation equipment.

[0013] Compared with the prior art, the fish-vegetable symbiosis system and the sewage treatment method thereof provided in the embodiments of the present application have the following technical effects:

[0014] The aquaculture sewage is precipitated through the vertical flow separator to obtain a primary water body located above the vertical flow separator and a secondary water body located below the vertical flow separator containing large particles; the fish manure separation equipment horizontally precipitates the primary water body to obtain a tertiary water body and a quaternary water body, and the tertiary water body is discharged into the ecological planting bed; the fermentation equipment filters and ferments the secondary water body and the quaternary water body, and discharges the filtered and fermented water body into the ecological planting bed; the sewage from aquatic organisms is treated by the vertical flow separator, the fish manure separation equipment, and the fermentation equipment and then enters the ecological planting bed to provide water and nutrients for the plants. The fermented water body is rich in nutrients that are easily absorbed and utilized by plants. At the same time, the water body purified by the ecological planting bed enters the aquaculture equipment again to provide water for aquatic organisms, thereby realizing the recycling of water bodies; secondly, the fermentation equipment can filter and ferment large particles such as fish manure, decompose them into nutrients that can be absorbed by plants, reduce the generation of harmful substances in the decomposition and absorption process, and at the same time improve the utilization rate of large particles such as fish manure as fertilizers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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:

[0016] Figure 1 A flowchart of a sewage treatment method provided in an embodiment of the present application;

[0017] Figure 2 A structural block diagram of the fish-vegetable symbiosis system provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the installation structure of the fish-vegetable symbiosis system provided in an embodiment of the present application;

[0019] Figure 4 A schematic diagram of the structure of the breeding equipment provided in the embodiment of the present application;

[0020] Figure 5 A schematic diagram of the structure of the fermentation equipment provided in the embodiment of the present application;

[0021] Figure 6 A schematic cross-sectional view of a fermentation device provided in an embodiment of the present application;

[0022] Figure 7 A schematic diagram of the structure of an ecological planting bed provided in an embodiment of the present application;

[0023] Figure 8 A schematic diagram of the structure of an ecological planting bed provided in another embodiment of the present application;

[0024] Fig. 9 for Figure 7 A schematic cross-sectional structure diagram of ;

[0025] Fig.10 for Figure 8 A schematic cross-sectional structure diagram of ;

[0026] Fig.11 A schematic diagram of the structure of the water outlet assembly provided in an embodiment of the present application;

[0027] Fig.12 for Fig.11 Schematic diagram of the explosion structure;

[0028] Fig.13 A schematic structural diagram of a fish excrement separation device provided in the first embodiment of the present application;

[0029] Fig.14 for Figure 1 A schematic cross-sectional structure diagram of ;

[0030] Fig.15This is a schematic diagram of the structure of the fish feces cutting assembly provided in an embodiment of the present application.

[0031] The following are marked in the accompanying drawings:

[0032] Fermentation equipment 300, ecological planting bed 400, fish manure separation equipment 500, breeding equipment 600, vertical flow separator 800;

[0033] Fermentation box 310, filtering device 320, liquid inlet device 330, liquid discharge device 340, sewage discharge device 350, internal circulation device 360, external circulation device 370, heating device 380, liquid inlet pipeline 331, liquid inlet control valve 332, first liquid level detection component 333, liquid discharge pumping component 341, liquid discharge control valve 342, second liquid level detection component 343, liquid discharge pipeline 345, sewage discharge pipeline 351, sewage discharge pumping component 352, internal circulation pipeline 361, external circulation pipeline 371, external circulation sprinkler 372;

[0034] Planting bed 410, water inlet assembly 420, water outlet assembly 430, blind pipe 440, matrix layer 450, grid plate 460, water pretreatment area 470, biochemical ball 480, first sleeve 431, drain pipe 432, second sleeve 433, support frame 434, siphon inlet 4311, top water inlet 4321, bottom water outlet 4322;

[0035] Fish excrement separation box 510, partition 520, fish excrement cutting assembly 530, sewage pipe 540, water inlet pipe 550, drainage pipe 560, sewage outlet 511, box cover 512, mounting shaft 531, rotary cutting blade 532, turbine blade 533, sewage branch pipe 541, sewage main pipe 542, sewage control valve 543, water inlet control valve 551;

[0036] Breeding pond 610 , breeding drainage pipeline 620 , collecting pipe 630 , fish toilet 640 , breeding liquid return pipeline 650 . DETAILED DESCRIPTION

[0037] The embodiment of the invention discloses a fish-vegetable symbiosis system and a sewage treatment method thereof, so as to solve the problems of incomplete treatment of fish feces and residual bait in the existing fish-vegetable symbiosis system, easy clogging and pollution of planting beds.

[0038] 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.

[0039] See also Figure 1 , Figure 1 A flowchart of a sewage treatment method provided in an embodiment of the present application.

[0040] In a specific embodiment, the sewage treatment method of the fish-vegetable symbiosis system provided in the present application comprises:

[0041] S11: The aquaculture wastewater passes through a vertical flow separator for vertical sedimentation of particles, thereby obtaining a primary water body located above the vertical flow separator and a secondary water body located below the vertical flow separator containing large particles;

[0042] S12: The primary water body is horizontally settled through the fish manure separation equipment to obtain the filtered tertiary water body and the quaternary water body containing particulate matter, and the tertiary water body is discharged into the ecological planting bed;

[0043] S13: Ferment the secondary water body and the quaternary water body through fermentation equipment, and discharge the fermented water into the ecological planting bed.

[0044] Among them, the vertical flow separator 800 (vertical flow sedimentation tank) is a mature existing technology, and the specific structure will not be repeated here; it can be understood that the diameter of the particles in the filtered primary water body is smaller than the diameter of the particles contained in the secondary water body, and the primary water body enters the fish manure separation equipment 500 for horizontal sedimentation to obtain the filtered tertiary water body, and the tertiary water body is discharged into the ecological planting bed 400.

[0045] The secondary water body containing large particles obtained by the vertical flow separator 800 enters the fermentation equipment 300 for fermentation, and the quaternary water body containing particles obtained after filtering by the fish manure separation equipment 500 also enters the fermentation equipment 300 for fermentation; after the aquaculture sewage passes through the vertical flow separator 800, the fish manure separation equipment 500 and the fermentation equipment 300, vertical sedimentation, horizontal sedimentation and fermentation are carried out, the large particles such as fish manure and leftover bait in the aquaculture sewage can be processed and decomposed into nutrients that can be absorbed by plants, reducing the harmful substances directly discharged into the ecological planting bed 400 and generated during the decomposition and absorption process, and at the same time increasing the utilization rate of large particles such as fish manure as fertilizers.

[0046] like Figure 2-3As shown, in a specific embodiment, the fish-vegetable symbiosis system provided by the present application includes a breeding equipment 600, a vertical flow separator 800, a fish manure separation equipment 500, a fermentation equipment 300 and an ecological planting bed 400; wherein the breeding equipment 600 is used to breed aquatic organisms, such as fish, shrimp, etc., and the breeding equipment 600 provides sewage containing nutrients such as fish manure and leftover bait for the subsequent ecological planting bed 400, and provides water and nutrients for plants. It can be understood that the water body treated by fermentation is rich in nutrients that are easily absorbed and utilized by plants. There is no need to add additional fertilizers and pesticides to the cultivated plants in the ecological planting bed 400, thereby reducing the planting cost, and can achieve fish-vegetable symbiosis and realize pollution-free and green planting; at the same time, the water body located in the ecological planting bed 400 that is absorbed and purified by the plants is recycled to the breeding equipment 600, providing purified water for the fish and shrimp organisms in the breeding equipment 600, further reducing the breeding cost of aquatic organisms and achieving a win-win situation.

[0047] The vertical flow separator 800 is connected to the aquaculture drainage pipeline 620 of the aquaculture equipment 600. The vertical flow separator 800 vertically settles the sewage. Specifically, the sewage enters the bottom of the vertical flow separator 800, and the sewage rises vertically. Large particles such as fish feces are deposited at the bottom, and the clearer sewage flows into the fish feces separation equipment 500 through the top wall of the vertical flow separator 800. The secondary water body containing particles enters the fermentation equipment 300 for fermentation.

[0048] In another embodiment, the step S12 uses a fish feces separation device to horizontally settle the primary water body, specifically including:

[0049] The particles in the primary water body are broken up, and the broken water body is horizontally settled step by step.

[0050] When the primary water body enters the fish manure separation device 500, in order to make the particles more easily decomposed by plants, a fish manure cutting assembly 530 or its crushing equipment can be set to crush the particles in the primary water body, and the crushed water body is horizontally settled step by step, so that clearer sewage with small particles can be discharged into the ecological planting bed 400.

[0051] The water inlet of the fish manure separation device 500 is connected to the vertical flow separator 800. The fish manure separation device 500 has an inner cavity; and is preferably configured as an openable and closable box body, specifically, the fish manure separation box 510 includes a box body and a box cover 512, and the box cover 512 and the box body are detachably fixedly connected to facilitate observation of the internal situation of the fish manure separation box 510, and when blockage or other situations occur inside the box body, timely processing can be carried out.

[0052] like Figure 13-15As shown, it can be understood that a plurality of partitions 520 are arranged longitudinally in the inner cavity of the fish manure separation box 510, and a sedimentation chamber is formed between adjacent partitions 520, and between the partitions 520 and the end wall of the fish manure separation box 510. The water inlet and the drain are respectively located at the longitudinal ends of the fish manure separation chamber. The aquaculture sewage enters the box through the water inlet, and after the action of multiple partitions 520, the particles in the aquaculture sewage are gradually settled, and the relatively clear sewage is discharged to the lower-level treatment equipment through the drain. The above device is provided with a horizontal multi-stage sedimentation structure, which effectively settles and separates large particles such as fish manure.

[0053] Among them, the fish manure cutting component 530 is arranged opposite to the water inlet to cut and break the fish manure entering the fish manure separation box 510, so that the large particles are converted into small particles to prevent them from clogging the sewage outlet 511, and can be smoothly discharged to the next treatment unit; at the same time, the sewage containing small particles is discharged through the drainage outlet to the ecological planting bed for biological decomposition, and the small particles contained therein can provide sufficient nutrients for the plants, which can be used by the plants and the organisms in the ecological planting bed, thereby improving the utilization rate of waste.

[0054] In other embodiments, the breaking of particles in the primary water body by the fish feces separation device 500 can be achieved by a ratchet or other structures, as long as the same technical effect can be achieved.

[0055] Each partition 520 is arranged in the inner cavity of the fish manure separation box 510 along the longitudinal direction, where the longitudinal direction is the length direction of the rectangular structure. The water inlet and the drain are respectively located on the end walls at both ends of the longitudinal direction of the fish manure separation box 510. Preferably, the water inlet and the drain are at the same height, and the height of any partition 520 is lower than the height of the water inlet and the drain, so that the water flow flows upward, reducing the disturbance of the particles at the bottom of the sedimentation chamber, and facilitating the sedimentation of particles such as fish manure; preferably, the heights of the partitions 520 are set to be the same to facilitate production and processing.

[0056] In this embodiment, sedimentation chambers are formed between adjacent partitions 520 and between the partitions 520 and the longitudinal end walls of the fish excrement separation box 510 to perform graded sedimentation separation on the fish excrement.

[0057] Specifically, a sewage outlet 511 is provided on the bottom wall of the fish manure separation box 510 corresponding to any sedimentation chamber, which is used to discharge the settled fish manure and realize the separation of large particles and water. Furthermore, the sewage outlet 511 is longitudinally located at one end of the sedimentation chamber close to the drain outlet, so that the sewage outlet 511 is arranged in the direction of water flow, so as to facilitate the collection and discharge of fish manure particles in each sedimentation chamber, and at the same time reduce the disturbance of the water flow rate to the particles as much as possible.

[0058] Specifically, in step S13, fermenting the secondary water body and the quaternary water body by fermentation equipment specifically includes:

[0059] Filtering the secondary water body and the quaternary water body to obtain a water body containing filter residue;

[0060] The water body containing the filter residue is fermented under preset fermentation conditions.

[0061] It can be understood that the water body of the filter residue is the residue and water body in the fermentation equipment, mainly located in the filter cavity of the filter device.

[0062] The preset fermentation conditions include preset fermentation temperature and fermentation humidity, as well as preset duration or preset number of internal circulation operations, so as to ensure sufficient fermentation of the tertiary water body and optimize the fermentation effect.

[0063] like Figure 5-6 As shown, the fermentation equipment 300 includes a fermentation box 310, a liquid inlet device 330 and a liquid discharge device 340; the inner cavity of the fermentation box 310 is provided with a filter device 320 for filtering the water entering the fermentation box 310; the liquid inlet device 330 is respectively connected to the bottom outlet of the vertical flow separator 800 and the sewage discharge pipeline 540 of the fish feces separation box 510, and is arranged opposite to the filter device 320; the liquid discharge device 340 is connected to the bottom of the fermentation box 310, and is used to discharge the water filtered by the filter device 320; wherein, The fermentation box 310 is preferably a rectangular parallelepiped structure, which has a hollow inner cavity, and the inner cavity is provided with a filter device 320, and the filter device 320 is preferably a conical funnel-shaped filter screen, and in other embodiments, it can also be set as a truncated cone-shaped filter screen, and the specific structure of the filter screen can be set as needed; the circumferential edge of the filter screen is fixed to the top edge of the fermentation box 310, and the filter device 320 divides the fermentation box 310 into two parts from top to bottom, a filter cavity formed by the filter screen and a liquid storage cavity formed by the outer wall of the filter screen and the inner wall of the fermentation box 310. Among them, the liquid inlet device 330 includes a liquid inlet pipeline 331, which is located at the top of the fermentation box 310 and is arranged opposite to the filter device 320, so that the water entering the fermentation box 310 from the vertical flow separator 800 and the fish feces separation box 510 is first filtered by the filter device 320, and the filtered water flows downward into the bottom of the fermentation box 310, that is, the liquid storage cavity. The drainage pipe 345 of the drainage device 340 is connected to the bottom of the fermentation box 310, and is used to discharge the clearer water in the liquid storage chamber. Since it contains less particulate matter such as fish feces, it does not require additional fermentation and can be directly supplied to the ecological planting bed.

[0064] Large particles such as fish feces are retained in the filter chamber of the filter device 320 for fermentation. When the ambient temperature is suitable, such as 25°C-40°C, fermentation can be carried out directly under natural conditions. When the ambient temperature does not meet the temperature required for fermentation, the fermentation box 310 can be heated by setting a heating device 380 to meet the fermentation temperature.

[0065] The fermentation equipment 300 can filter and ferment large particles such as fish manure, decompose them into nutrients that can be absorbed by plants, reduce the generation of harmful substances during the decomposition and absorption process, and improve the utilization rate of large particles such as fish manure as fertilizers.

[0066] The method further comprises:

[0067] S14: Nitrification of water in ecological planting beds.

[0068] The ecological planting bed 400 provided in the present application includes a planting bed body 410 and a plurality of blind tubes 440; the planting bed body 410 is a rectangular cube structure with an upper opening, which can adopt a geotechnical structure or a support plus a waterproof cloth structure. The inner cavity of the planting bed body 410 is filled with a matrix layer 450, and the matrix layer 450 includes pebbles or volcanic rocks, etc. The remaining space of the planting bed body 410 is filled with the matrix to a preset height. In other embodiments, the specific form of the matrix layer 450 can be set as needed, which will not be repeated here. A plurality of blind tubes 440 are provided at the bottom of the planting bed body 410, and all the blind tubes 440 are arranged along the horizontal direction of the planting bed body 410 and extend in the longitudinal direction. The blind tube 440 has a through hole that runs through along the length direction to facilitate drainage of the water body. The water inlet assembly 420 and the water outlet assembly 430 are respectively arranged at the longitudinal ends of the planting bed 410, wherein the water inlet assembly 420 is located above the planting bed 410, and the water outlet assembly 430 is located at the bottom wall of the planting bed 410. The water inlet assembly 420 is respectively connected to the drainage device 340 of the fermentation equipment 300 and the drainage pipeline 560 of the fish feces separation equipment 500. Preferably, the blind pipe 440 extends longitudinally to facilitate the circulation of water at the bottom of the planting bed 410. The blind pipe 440 is arranged at intervals in the transverse direction on the bottom wall of the planting bed 410, such as being fixed by threaded fasteners. In other embodiments, it can also be fixed by welding or other methods, and can be arranged as needed.

[0069] The above-mentioned ecological planting bed 400 has a water inlet component 420 and a water outlet component 430 at the longitudinal ends of the planting bed body 410, respectively. The bottom wall of the planting bed body 410 is provided with a plurality of blind pipes 440. The blind pipes 440 are arranged along the longitudinal direction and can drain the water of the water inlet component 420 to the water outlet component 430, so as to facilitate the discharge of water flow at the bottom of the planting bed body 410, improve the water flow and drainage capacity at the bottom of the planting bed, facilitate microorganisms to obtain sufficient oxygen, promote reproduction metabolism and purify water quality.

[0070] At the same time, a grating plate 460 is provided at one end of the planting bed 410 close to the water inlet assembly 420, and the two ends of the grating plate 460 in the length direction are respectively connected to the lateral side walls of the planting bed 410, and the grating plate 460, the lateral side walls of the planting bed 410 and the longitudinal end walls form a water pretreatment area 470, and the water body is pretreated at the front end. Preferably, the water pretreatment area 470 is filled with biochemical balls 480 to add pre-cultured microorganisms, so as to promote the rapid formation of a microbial ecosystem in the ecological planting bed 400 and save time for cultivating microorganisms. In this embodiment, the incoming water body can be pretreated, for example, biochemical balls 480 containing microorganisms such as nitrifying bacteria are placed, which can accelerate the speed of cultivating microbial ecosystems such as nitrifying bacteria in the ecological planting bed 400, thereby quickly purifying the water quality. Specifically, the water inlet assembly 420 is arranged above the planting bed 410 and is arranged opposite to the water pretreatment area 470.

[0071] like Figure 4 As shown, the aquaculture equipment 600 includes an aquaculture liquid return pipeline 650, a aquaculture pond 610 and a fish feces collection device. The aquaculture pond 610 is preferably a rectangular or cylindrical structure, preferably a cylindrical structure. The fish feces collection device is located at the center of the aquaculture pond 610 and is arranged in the vertical direction. The aquaculture liquid discharge pipeline 620 is located at the bottom of the aquaculture pond 610. The fish feces and bait particles collected by the fish feces collection device are discharged from the aquaculture pond 610 and enter the vertical flow separator 800 for solid-liquid separation, and the sewage is vertically settled. Preferably, the fish manure collection device includes a collection pipe 630 and a fish toilet 640. The collection pipe 630 is arranged in a vertical direction, and the circumferential outer wall of the collection pipe 630 is evenly provided with water-permeable holes. The sewage rotates along the circumference of the fish pond according to the direction of the aquaculture return liquid pipeline 650, and forms a vortex at the center. The fish manure and residual bait gather at the rotation center, enter the collection pipe 630 through the water-permeable holes, flow through the fish toilet 640, and flow into the fish manure separation box 510 along the aquaculture drainage pipeline 620.

[0072] In another embodiment, the aquaculture liquid return pipeline 650 extends vertically to the inside of the aquaculture pond 610, and the aquaculture liquid return pipeline 650 is sequentially provided with a plurality of drainage holes from top to bottom to further drive the water in the aquaculture pond to rotate along the direction of the openings, so that particles such as fish feces and bait are concentrated in the center of the aquaculture pond 610, so as to be easily discharged from the aquaculture pond 610 through the collection pipe and the fish toilet 640. Preferably, the aquaculture liquid return pipeline 650 can also be arranged obliquely, with a certain inclination angle with the vertical direction, so as to further improve the driving of the water body to rotate.

[0073] It can be understood that the ecological planting bed 400 provides a planting space for plants, and the drainage outlet of the fish manure separation box 510 and the drainage pipeline 345 of the fermentation equipment 300 are respectively connected to the ecological planting bed 400. The sewage after solid-liquid separation in the fish manure separation box 510 and the water after filtration and fermentation in the fermentation equipment 300 all enter the ecological planting bed 400 to provide nutrients for the plants.

[0074] The method further comprises:

[0075] S15: The aquaculture wastewater is pumped into the vertical flow separator 800 through the pumping device, and the primary water body flows to the fish manure separation equipment and the ecological planting bed under the action of gravity, and the secondary water body containing large particles flows to the fermentation equipment under the action of gravity.

[0076] In one embodiment, the aquaculture equipment 600 is provided with a pumping device, the fish manure separation equipment 500 and the ecological planting bed 400 are both unpowered equipment, the aquaculture equipment 600 and the fermentation equipment 300 are located below the ground, and the vertical flow separator 800, the fish manure separation equipment 500 and the ecological planting bed 400 are located above the ground; the outlet of the vertical flow separator 800 is higher than the fish manure separation equipment 500, the drainage pipe 560 of the fish manure separation equipment 500 is higher than the ecological planting bed 400, and the water outlet component of the ecological planting bed 400 is higher than the aquaculture equipment 600; the sewage of the aquaculture equipment 600 is pumped into the bottom of the vertical flow separator 800 through the pumping device, vertically settled through the vertical flow separator 800, and flows into the water inlet pipe 550 of the fish manure separation box 510 from the top of the vertical flow separator 800, and settles through several partitions 520 of the fish manure separation box 510, and the clearer water body The water flows into the ecological planting bed 400 through the drainage pipe 560 under the action of gravity; the sewage containing large particles such as fish feces enters the fermentation equipment 300 through the sewage pipe 540 under the action of gravity. Similarly, the secondary water body containing large particles at the bottom of the vertical flow separator 800 enters the fermentation equipment 300, and the water body after fermentation and filtration treatment is lifted to the ecological planting bed 400 by the drainage pumping component 341 of the fermentation equipment 300 for plant absorption and utilization. The water body after fermentation treatment is rich in nutrients that are easily absorbed and utilized by plants, which promotes the plants to obtain sufficient nutrition; finally, the water body in the ecological planting bed 400 relies on gravitational potential energy to flow back to the breeding equipment 600 for recycling, thereby circulating the water in the fish-vegetable symbiotic system; it can be understood that when the water level of the breeding equipment 600 is lowered, the breeding equipment 600 can be replenished with water through an external water source.

[0077] The breeding equipment 600, the fish excrement separation equipment 500, the fermentation equipment 300, and the ecological planting bed 400 are further described below:

[0078] Embodiment 1

[0079] like Figure 13-15 As shown, Fig.13 A schematic structural diagram of a fish excrement separation device provided in the first embodiment of the present application; Fig.14 for Figure 1 A schematic cross-sectional structure diagram of; Fig.15 This is a schematic diagram of the structure of the fish feces cutting assembly provided in an embodiment of the present application.

[0080] In a specific embodiment, the fish feces cutting assembly 530 is longitudinally located in the first sedimentation chamber near the water inlet; the fish feces cutting assembly 530 is detachably fixedly connected to the fish feces separation box 510, thereby facilitating disassembly and assembly; the height of the fish feces cutting assembly 530 can be set according to the height of the water inlet, and preferably the two are at the same height plane to increase the contact area between the fish feces cutting assembly 530 and the straight water flow, thereby improving the cutting effect.

[0081] Specifically, the fish excrement cutting assembly 530 includes a mounting shaft 531 and a cutting piece; the mounting shaft 531 is fixed to the bottom wall of the fish excrement separation box 510, and preferably adopts a detachable fixed connection to facilitate disassembly and assembly; the cutting piece is fixed to the mounting shaft 531 and can rotate around the mounting shaft 531, and the axis of the cutting piece is preferably colinear with the axis of the mounting shaft 531. The cutting piece rotates around the mounting shaft 531 under the action of the water flow at the water inlet to cut the fish excrement; the cutting piece is fixed to the mounting shaft 531 through a bearing, and there is no need to set up additional power equipment to provide power for the rotation of the cutting piece, which simplifies the device structure and converts the kinetic energy and potential energy of the water into the kinetic energy of the cutting piece.

[0082] The cutting member includes a turbine blade 533 and a rotary cutting blade 532. The turbine blade 533 is detachably fixedly connected to the mounting shaft 531 and rotates around its own axis under the drive of the water flow to achieve the cutting of large particles such as fish feces. The turbine blade 533 is a mature existing technology, and its specific structure is not repeated. The rotary cutting blade 532 can be arranged in a radial or spiral shape to increase the contact area.

[0083] Furthermore, in order to improve the cutting effect, a rotary cutting blade 532 is provided on the upper and lower sides of the turbine blade 533, respectively, so that the water flow from top to bottom is cut in sequence through the three vertical cutting structures, and the crushing effect is improved through the combined cutting method of the three cutting structures.

[0084] The fish excrement separation device 500 provided in the embodiment of the present application has the following technical effects:

[0085] First, a fish excrement cutting assembly 530 is arranged at a position relative to the water inlet of the fish excrement separation box 510 to cut the fish excrement entering the fish excrement separation box 510, so as to preliminarily cut and process the large particles of fish excrement to prevent them from adhering to the bottom of the box due to gravity to form dust and dirt, making it impossible to discharge sewage, and preventing the sewage discharge pipeline 540 from being blocked;

[0086] Second, the large particles such as fish feces are cut into small particles by the fish feces cutting assembly 530, and are directly discharged into the ecological planting bed 400 through the drainage port. The small particles are biodegraded by the ecological planting bed 400 to ensure the nutrient requirements of the plants in the ecological planting bed 400;

[0087] Third, a plurality of partitions 520 are arranged longitudinally in the inner cavity of the fish manure separation box 510, and a sedimentation chamber is formed between adjacent partitions 520 and between the partitions 520 and the end walls of the fish manure separation box 510. The water inlet and the drain are respectively located at the longitudinal ends of the fish manure separation chamber. The aquaculture sewage enters the box through the water inlet, and after being acted upon by a plurality of partitions 520, the particles in the sewage are gradually settled, and the clearer sewage is discharged to the lower-level treatment equipment through the drain. The above device is provided with a horizontal multi-stage sedimentation device to effectively settle and separate large particles such as fish manure.

[0088] Specifically, the bottom wall of the fish manure separation box 510 corresponding to any sedimentation chamber is provided with a sewage outlet 511 for discharging the settled fish manure to achieve separation of large particles and water. Furthermore, the sewage outlet 511 is longitudinally located at one end of the sedimentation chamber close to the drain outlet, so that the sewage outlet 511 is arranged in accordance with the direction of water flow, so as to facilitate the collection and discharge of fish manure particles in each sedimentation chamber, while minimizing the disturbance of the water flow rate on the particles.

[0089] At the same time, the sewage outlet 511 is connected to a sewage pipeline 540, and the sewage pipeline 540 includes a plurality of sewage branch pipes 541 and a sewage main pipe 542. The sewage branch pipes 541 are located below the fish manure separation box 510 and extend in the transverse direction. The sewage branch pipes 541 are arranged in a one-to-one correspondence with the sewage outlet 511. One end of any sewage branch pipe 541 is connected to the sewage outlet 511, and the other end is connected to the sewage main pipe 542. The sewage main pipe 542 extends in the longitudinal direction of the fish manure separation box 510; a sewage control valve is provided on the sewage main pipe 542 to control the on-off of the sewage main pipe 542, so as to perform intermittent sewage discharge on the fish manure separation box 510 and discharge particulate matter to the fermentation equipment 300.

[0090] In this embodiment, the opposite side walls of the fish excrement separation box 510 are respectively provided with plug-in grooves, and the two lateral ends of any partition 520 are respectively plugged and fixed with the corresponding plug-in grooves. The plug-in grooves extend from top to bottom on the side walls until they contact the bottom wall of the fish excrement separation box 510; the plug-in grooves are arranged on the opposite side walls at the two lateral ends of the fish excrement separation box 510, and the two lateral ends of the partition 520 are respectively plugged and fixed with the corresponding plug-in grooves, so as to facilitate the disassembly and cleaning of the plug-in plates.

[0091] In another embodiment, the water inlet is connected to a water inlet pipeline 550, and the drain outlet is connected to a drain pipeline 560; one end of the water inlet pipeline 550 is connected to a water source, and the other end is connected to the water inlet, and a water inlet control valve 551 is provided on the water inlet pipeline 550. The drain pipeline 560 is connected to the drain outlet, and the drain pipeline 560 has a drain control valve. Preferably, the water inlet control valve 551, the drain control valve and the sewage control valve can be set as solenoid valves for automatic control.

[0092] The drainage pipeline 560 may include a plurality of drainage branches, which are arranged according to the structure of the ecological planting bed to facilitate uniform irrigation of the ecological planting bed.

[0093] On the basis of the above embodiments, the cross-section of the fish feces separation box 510 is a trapezoid, and the fish feces separation box 510 is inverted, so that the upper bottom of the trapezoid is at the bottom and the lower bottom is at the top, thereby forming a funnel-like structure, which is convenient for the deposition of particles such as fish feces at the bottom, and further improves the separation effect.

[0094] The specific working process is as follows: the aquaculture sewage containing fish excrement and residual bait enters the fish excrement separation box 510 through the water inlet pipe 550, is cut by the fish excrement cutting assembly 530, and the large particles such as fish excrement are crushed into small particles. During the longitudinal flow process, the particles in the aquaculture sewage are gradually settled through the action of multiple partitions 520, and finally the relatively clear liquid of the aquaculture sewage is discharged from the drainage pipe 560 and enters the lower unit. When the water inlet control valve 551 is closed, the sewage control valve is opened to discharge the particles through the sewage pipe 540 to the fermentation equipment 300 for treatment.

[0095] Embodiment 2

[0096] like Figure 5-6 As shown, Figure 5 A schematic diagram of the structure of the fermentation equipment provided in the embodiment of the present application; Figure 6 This is a schematic diagram of the cross-sectional structure of the fermentation equipment provided in an embodiment of the present application.

[0097] In this embodiment, a heating device 380 is provided in the inner cavity of the fermentation box 310 for adjusting the temperature of the inner cavity of the fermentation box 310. The heating device 380 can be provided close to the bottom of the filtering device 320 to better adjust the temperature of the filter residue. The heating device 380 is connected to the control device for automatic control. The heating device 380 can be set as a heating element such as a resistance wire, and a specific structural setting can be performed as needed, which will not be repeated here.

[0098] In order to further improve the fermentation effect of the filter residue on the filter device 320, it also includes:

[0099] The internal circulation device 360 ​​has one end connected to the liquid storage chamber of the fermentation box 310, and the other end connected to the filter chamber of the filter device 320, and is used to lift the filtered liquid in the fermentation box 310 to the filter chamber of the filter device 320 for internal circulation; thereby preventing the filter residue in the filter chamber from being insufficiently moist or adhering to the filter device 320 due to long-term dehydration, and can also make the fermentation bacteria added manually or by machine evenly distributed on the fecal residue to play a role in stirring the water body. The water body at the bottom of the fermentation box 310 is lifted and transported to the filter chamber of the filter device 320 through the internal circulation device 360 ​​to ensure that the humidity of the filter chamber meets the fermentation conditions, and at the same time prevent the filter residue from adhering to the filter net, so that the filter residue and the water body are fully in contact and the fermentation bacteria agent and the filter residue are evenly mixed, thereby further improving the fermentation effect.

[0100] A sewage discharge device 350 is connected to the bottom of the filter device 320. After the fermentation is completed, the water and filter residue in the filter device 320 after fermentation are discharged through the sewage discharge device 350 and enter the next-level processing unit for processing.

[0101] The control device is respectively connected to the liquid inlet device 330, the liquid discharge device 340, the internal circulation device 360 ​​and the sewage discharge device 350 to automatically control the fermentation equipment 300 and improve the automation level of the equipment.

[0102] Specifically, the control method of the fermentation equipment includes:

[0103] Determining whether the liquid level in the filter chamber of the filter device reaches a first preset liquid level;

[0104] If so, disconnect the liquid inlet pipeline, start the internal circulation device, and lift the water in the fermentation box to the filter chamber of the filter device for internal circulation operation.

[0105] The first preset liquid level can be monitored by setting a liquid level sensor or a liquid level meter, and the circulation of water in the fermentation box can be achieved by starting the internal circulation device, so as to better replenish the moisture of the filter residue in the filter chamber, meet the humidity requirement for fermentation, and improve the fermentation effect; at the same time, it can prevent the filter residue from staying in the filter device for too long and causing adhesion. Fermentation bacteria can also be added in the fermentation box or the filter chamber, and the fermentation bacteria can be evenly dispersed through internal circulation to promote fermentation.

[0106] In one embodiment, the liquid inlet device 330 further includes:

[0107] The liquid inlet control valve 332 is located on the liquid inlet pipeline 331 and is used to control the on-off of the liquid inlet pipeline 331;

[0108] The first liquid level detection component 333 is located in the filter cavity of the filter device 320 and is used to detect the liquid level of the filter cavity of the filter device 320 .

[0109] The liquid inlet pipeline 331 is located outside the fermentation box 310, the liquid inlet control valve 332 is preferably a solenoid valve, the first liquid level detection component 333 is a liquid level sensor, and the liquid level sensor is preferably fixed at the first preset liquid level of the filter device 320, and the two are detachably fixedly connected for easy disassembly and assembly; in other embodiments, when the fermentation equipment 300 is divided into two sets, when the liquid level of the filter cavity of the filter device 320 of one set is higher than the first preset liquid level, the liquid inlet control valve 332 is used to reverse the direction, and the water flows into the filter cavity of the other set of the filter device 320. Specifically, the liquid inlet pipeline 331 includes a liquid inlet main pipe and a liquid inlet branch pipe, which are arranged in a T shape, and the two liquid inlet branches are respectively connected to the fermentation box 310. The liquid inlet control valve 332 is arranged at the intersection of the T-shaped structure to realize the water reversal.

[0110] In another embodiment, a heating device 380 is provided in the inner cavity of the fermentation box 310 for adjusting the temperature of the inner cavity of the fermentation box 310. The heating device 380 can be provided close to the bottom of the filtering device 320 to better adjust the temperature of the filter residue. The heating device 380 can be provided as a heating element such as a resistance wire, and a specific structural setting can be performed as needed, which will not be repeated here.

[0111] The method also includes:

[0112] When the liquid level in the filter chamber of the filter device reaches a first preset liquid level, the heating device is controlled to turn on and the temperature of the fermentation box is adjusted to a preset fermentation temperature.

[0113] It can be understood that large particles such as fish feces are retained in the filter chamber of the filter device 320 for fermentation. When the ambient temperature is suitable, such as 30-40°C, fermentation can be directly carried out under natural conditions; when the ambient temperature does not meet the required fermentation temperature, the fermentation box 310 can be heated by setting a heating device 380 to meet the fermentation temperature. The preset fermentation temperature is set to 30°C-40°C.

[0114] At the same time, the drainage pipe 345 of the drainage device 340 is connected to the bottom of the fermentation box 310, which is used to discharge the clearer water in the liquid storage chamber. Since it contains less particulate matter such as fish feces, it does not require additional fermentation and can be directly supplied to the ecological planting bed.

[0115] Before determining whether the liquid level in the filter chamber of the filter device has reached a first preset liquid level, the method further comprises:

[0116] It is determined whether the liquid level in the inner cavity of the fermentation box reaches a second preset liquid level. If so, the drainage pipeline is controlled to open.

[0117] In another embodiment, the method further comprises:

[0118] Determine whether the inner liquid level of the fermentation box reaches a third preset liquid level. If so, control the drain pipeline to close; wherein the third preset liquid level is lower than the second preset liquid level.

[0119] Specifically, the drainage device 340 also includes a drainage pumping component 341 and a drainage control valve 342; wherein the drainage pumping component 341 is located in the fermentation box 310, and the drainage pumping component 341 is connected to the drainage pipeline 345, and is used to pump the water filtered by the filtering device 320;

[0120] The discharge control valve 342 is located on the discharge pipeline 345 to control the discharge pipeline 345 to be on and off.

[0121] The drainage pumping assembly 341 is located on the bottom wall of the fermentation box 310, and part of the drainage pipeline 345 is arranged inside the fermentation box 310, and part of it is arranged outside the fermentation box 310. The drainage pumping assembly 341 pumps out the water in the fermentation box 310 after being filtered by the filtering device 320, and transports it to the next-level processing unit.

[0122] Specifically, the drainage device 340 also includes a second liquid level detection component 343, which is located at a second preset liquid level at the bottom of the fermentation box 310, and is used to detect the liquid level of the water in the fermentation box 310 after being filtered by the filter device 320. When the liquid level of the fermentation box 310 is higher than the second preset liquid level, the drainage control valve 342 is controlled to operate and the drainage pipeline 345 is opened.

[0123] When the liquid level of the water in the fermentation box 310 after being filtered by the filter device 320 is higher than the second preset liquid level, the drainage pipeline 345 is opened for drainage, and the drainage control valve 342 is closed after the preset drainage time, so that a certain amount of water is left in the fermentation box 310 to realize the above-mentioned internal circulation operation process. Alternatively, a third liquid level detection component is set at the third preset liquid level to detect whether the liquid level in the inner cavity of the fermentation box 310 reaches the third preset liquid level. If so, the drainage control valve 342 is controlled to operate and the drainage pipeline 345 is closed; it can be understood that the third preset liquid level is lower than the second preset liquid level setting, that is, the third liquid level detection component is lower than the second liquid level detection component 343 setting.

[0124] In a specific embodiment, the internal circulation device 360 ​​includes an internal circulation pipeline 361 and an internal circulation pumping component, one end of the internal circulation pumping component is connected to the fermentation box 310, and the other end is connected to the filter cavity of the filter device 320, so as to realize the process of transporting the filtered liquid in the fermentation box 310 to the filter cavity of the filter device 320 for internal circulation operation; and in order to simplify the device structure, the drainage pumping component 341 can be reused as an internal circulation pumping component, specifically, one end of the internal circulation pipeline 361 is connected to the drainage pipeline 345 through the drainage control valve 342; the drainage control valve 342 is controlled to reverse and open the internal circulation pipeline 361, and the liquid at the bottom of the fermentation box 310 enters the filter device 320 for internal circulation through the drainage pumping component 341, part of the drainage pipeline 345 and the internal circulation pipeline 361, thereby simplifying the device structure, setting a pump body to realize drainage and internal circulation operations, and reducing operating costs. It can be understood that the internal circulation pipeline 361 is arranged outside the fermentation box 310 to simplify the internal structure of the fermentation box 310, while preventing liquid splashing or microorganisms from attaching to the pipeline and corroding the pipeline, thereby increasing the service life of the device.

[0125] In another embodiment, a sewage discharge device 350 is connected to the bottom of the filter device 320. After the fermentation is completed, the water and filter residue in the filter device 320 after fermentation are discharged through the sewage discharge device 350 and enter the next-level processing unit for processing.

[0126] Specifically, when fermentation is completed, the residue liquid in the filter device 320 is rinsed with clean water, and the clearer liquid rich in fermentation nutrients flows into the inner cavity (liquid storage cavity) of the fermentation box. When the liquid level in the liquid storage cavity reaches the second preset liquid level, it is discharged into the lower unit by the discharge device 340 to provide sufficient nutrients for the plants; the residue liquid after flushing is discharged into the lower unit by the sewage discharge device 350.

[0127] Wherein, after the internal circulation device is started to lift the water in the fermentation box into the filter cavity of the filter device for internal circulation operation, the method further comprises:

[0128] Determine whether the internal circulation operation is completed. If so, control the sewage discharge device to open and discharge the water and filter residue of the filter device after fermentation;

[0129] Determine whether the internal circulation operation is completed, and if so, control the heating device to be turned off.

[0130] Specifically, the internal circulation operation includes lifting the water in the fermentation tank to the filter chamber of the filter device for a preset number of times; at this time, the judgment on whether the internal circulation operation is completed is to judge whether the water in the fermentation tank has been lifted to the filter chamber of the filter device for a preset number of times. If so, the internal circulation operation is considered to be completed.

[0131] Alternatively, the internal circulation operation specifically includes repeatedly lifting the water in the fermentation box to the filter chamber of the filter device at preset time intervals within the preset internal circulation time. At this time, the judgment on whether the internal circulation operation is completed is to judge whether the preset internal circulation time has been executed. If so, the internal circulation operation is considered to be completed.

[0132] When the internal circulation operation is completed, the sewage discharge device is controlled to open and the heating device is closed.

[0133] Optionally, the sewage discharge device 350 includes a sewage discharge pipeline 351 and a sewage discharge pumping assembly 352, one end of the sewage discharge pipeline 351 is connected to the bottom of the filter device 320; the sewage discharge pumping assembly 352 is located on the sewage discharge pipeline 351, and pumps the fermented filter residue and water to the next-level processing unit. The sewage discharge pipeline 351 is an L-shaped structure on one side of the sewage discharge pumping assembly 352, the vertical part of the L-shaped structure is connected to the bottom interface of the filter device 320, and the horizontal part of the L-shaped structure is connected to the sewage discharge pumping assembly 352; at the same time, a support column is set at the bottom of the vertical part of the L-shaped structure to support the sewage discharge pipeline 351 in the fermentation box 310.

[0134] Furthermore, after the internal circulation operation is completed, it is necessary to obtain the nutrients produced by the fermentation and discharge the fermented filter residue and water. In order to facilitate the better separation of the filter residue from the filter net, the above-mentioned equipment also includes an external circulation device 370, which includes an external circulation pipeline 371 and a plurality of external circulation sprinklers 372; the external circulation pipeline 371 is located in the inner cavity of the fermentation box 310 and is arranged along the circumferential outer wall of the filter device 320; the plurality of external circulation sprinklers 372 are located on the external circulation pipeline 371 and are arranged toward the outer wall of the filter device 320; the external circulation sprinkler 372 is a rotating nozzle that can swing up and down, and it sprays clean water toward the outer wall of the filter net and around it. The clean water rinses the fermentation filter residue to carry the nutrients into the liquid storage cavity, and promotes the fermented particles to flow to the bottom of the filter net for easy discharge, and avoids clogging of the filter net. When the water level in the liquid storage cavity is higher than or equal to the second preset liquid level, the drainage pipeline 345 is opened for drainage.

[0135] In one embodiment, the method further comprises:

[0136] It is determined whether the sewage discharge device is turned on. If so, the external circulation device is controlled to start and clean water is sprayed on the peripheral outer wall of the filter device to assist the filter device 320 in sewage discharge.

[0137] In another embodiment, the method further comprises:

[0138] Determine whether the internal circulation operation is completed. If so, start the external circulation device and operate it for a preset time. Spray clean water on the circumferential outer wall of the filter device 320 to flush the nutrients in the fermentation residue. After the preset flushing time, control the sewage discharge device 350 to open and discharge the water and residue of the filter device after fermentation.

[0139] Specifically, the external circulation pipeline 371 is preferably a rectangular structure, and support rods are respectively arranged at the four vertices of the rectangle. The bottom ends of the support rods are fixed to the bottom wall of the fermentation box 310 to fix the external circulation pipeline 371; the heating device 380 can be arranged between the two support rods, and the external circulation pipeline 371 and the heating device 380 are respectively fixed by the support rods to simplify the device structure.

[0140] The fermentation equipment 300 of the present application includes a liquid inlet device 330, a liquid discharge device 340, a sewage discharge device 350, an internal circulation device 360, an external circulation device 370 and a control device. The control device is respectively connected to the internal circulation device 360, the external circulation device 370, the liquid inlet device 330, the liquid discharge device 340 and the sewage discharge device 350. The liquid inlet device 330 is located above the fermentation equipment 300 and controls the amount of sewage entering the fermentation equipment 300. The clear liquid is discharged from the liquid discharge device 340 for use by the plants in the planting unit, and the particulate matter is discharged from the sewage discharge device 350 for further treatment; the control device is used to execute the above-mentioned operation method.

[0141] The liquid inlet device 330 includes a liquid inlet pipeline 331, a liquid inlet control valve 332 and a first liquid level detection component 333. One end of the liquid inlet pipeline 331 is connected to the output end of the aquaculture sewage, and the other end is connected to two fermentation boxes 310 arranged in parallel. The liquid inlet control valve 332 is used to realize the liquid inlet of the two fermentation boxes 310. When the liquid level of the aquaculture sewage reaches the first preset liquid level of the filter net, the control device controls the liquid inlet control valve 332 to close the liquid inlet pipeline 331 on the current side, stop the flow of aquaculture sewage, and open the liquid inlet pipeline 331 on the other side, and the aquaculture sewage flows into the other fermentation box 310.

[0142] The fermentation box 310 includes a box body and a box cover, and a vent is arranged on the box cover. A filter screen is arranged inside the fermentation box 310, and the filter screen is in the shape of a conical funnel. A sewage pipe outlet is arranged at the bottom of the filter screen, and the outlet end of the sewage pipe outlet is connected to the sewage pipeline 351 of the sewage discharge device 350, and a support column is arranged at the bottom of the sewage pipeline 351. The external circulation sprinkler 372 is arranged in a ring around the filter screen, and support rods are respectively arranged at the four vertices of the external circulation pipeline 371. One end of the external circulation pipeline 371 is connected to the external circulation sprinkler 372. A nozzle is provided on the external circulation sprinkler 372, and the nozzle can swing up and down to spray water on the conical filter screen. The heating device 380 is arranged between the two support rods, and the fermentation temperature is controlled by heating the relatively clean sewage at the bottom of the fermentation box 310 and through internal circulation; the aquaculture sewage flows into the filter screen in the fermentation box 310 through the liquid inlet pipeline 331, and the relatively clean sewage passes through the filter screen and falls into the bottom of the fermentation box 310. The viscous liquid containing particles such as fish feces is collected in the filter screen until the liquid level reaches the liquid level sensing end of the first liquid level detection component 333, and the signal is transmitted to the control device to control the aquaculture sewage to switch and discharge into another fermentation equipment 300.

[0143] The drainage device 340 includes a drainage pipeline 345, a drainage pumping component 341, a drainage control valve 342 and a second liquid level detection component 343. The water pump is arranged at the bottom of the fermentation tank 310. The drainage pipeline 345 is connected to the lower processing unit. The liquid level sensing end of the second liquid level detection component 343 is arranged at the second preset liquid level at the bottom of the fermentation tank 310. When the relatively clean sewage leaked from the filter screen is accumulated at the bottom of the fermentation tank 310 and reaches the second preset liquid level of the fermentation tank 310, the liquid level sensing end of the second liquid level detection component 343 senses the liquid level and transmits a signal to the control device to control the drainage control valve 342 to open, and the clean liquid flows from the drainage pipeline 345 into the plant planting unit for plant growth; when the liquid level of the relatively clean sewage is lower than the third preset liquid level of the fermentation tank 310, the drainage control valve 342 is closed to stop drainage.

[0144] The sewage discharge system includes a sewage pumping component 352 and a sewage pipeline 351. The sewage pipeline 351 is connected to the bottom of the filter device 320. When the fermentation is completed, the sewage pumping component 352 is started, and the particle suspension in the filter screen flows into the sewage pipeline 351 from the sewage pipe port and is discharged through the sewage pumping component 352 and the sewage pipeline 351.

[0145] The specific working process is as follows: the aquaculture wastewater containing large particles such as fish feces and bait residues enters the liquid inlet pipeline 331 and flows into the filter device 320. The particles such as feces and bait residues are intercepted by the filter net, and the relatively clean wastewater leaks into the bottom of the fermentation box 310. When the relatively clean wastewater reaches the second preset liquid level of the fermentation box 310, the second liquid level detection component 343 sends a signal to the control device, and the control device controls the discharge control valve 342 to operate, open the discharge pipeline 345, and discharge the relatively clean wastewater into the ecological planting bed 400; when the liquid level in the fermentation box 310 is lower than the third preset liquid level When the liquid level of the filter screen is higher than the first preset level, the liquid inlet control valve 332 is closed, the liquid inlet pipeline 331 is closed to stop the aquaculture sewage from flowing in, and the aquaculture sewage enters the fermentation equipment 300 on the other side through the liquid inlet control valve 332; when the liquid level of the filter screen is higher than the first preset level, the heating device 380 and the internal circulation device 360 ​​are controlled to be turned on, and the appropriate fermentation temperature and ventilation conditions are adjusted, such as adding fermentation bacteria agents to quickly ferment materials such as fish feces and residual bait. The water in the fermentation box 310 enters the filter device 320 through the liquid discharge pumping component 341, part of the liquid discharge pipeline 345 and the internal circulation pipeline 361 for internal circulation, and is sprayed on the fish feces and residual bait on the filter screen through the rotating nozzle. The relatively clear sewage starts the circulation mode between the fermentation box 310 and the filter screen, the vent keeps air flowing into the fermentation box 310, and the rotating nozzle sprays relatively clear liquid to increase the fermentation oxygen conditions. When fermentation is completed, the external circulation device 370 is started, and the external circulation sprinkler 372 sprays clean water toward the filter net from the outside of the filter net, and the relatively clean sewage rich in nutrients flows from the filter device 320 into the liquid storage chamber at the bottom of the fermentation box 310. After the external circulation device 370 is flushed for a preset time, the sewage pumping component 352 is started to promote the fermented particles to flow to the bottom of the filter net for easy discharge, and the particle suspension in the filter net flows into the sewage pipeline 351 from the sewage pipe outlet, and is discharged through the sewage pumping component 352 and the sewage pipeline 351.

[0146] Embodiment 3

[0147] like Figure 7-12 As shown, Figure 7 A schematic diagram of the structure of an ecological planting bed provided in an embodiment of the present application; Figure 8 A schematic diagram of the structure of an ecological planting bed provided in another embodiment of the present application; Fig. 9 for Figure 7 A schematic cross-sectional structure diagram of; Fig.10 for Figure 8 A schematic cross-sectional structure diagram of; Fig.11 A schematic diagram of the structure of the water outlet assembly provided in an embodiment of the present application; Fig.12 for Fig.11 Schematic diagram of the explosion structure.

[0148] In a specific embodiment, the ecological planting bed 400 provided in the present application includes a planting bed body 410 and a plurality of blind tubes 440; the planting bed body 410 is a rectangular cube structure with an upper opening, which can adopt a geotechnical structure or a support plus a waterproof cloth structure. The inner cavity of the planting bed body 410 is filled with a matrix layer 450, and the matrix layer 450 includes pebbles or volcanic rocks, etc. The remaining space of the planting bed body 410 is filled with the matrix to a preset height. In other embodiments, the specific form of the matrix layer 450 can be set as needed, which will not be repeated here. A plurality of blind tubes 440 are provided at the bottom of the planting bed body 410, and all the blind tubes 440 are arranged along the horizontal direction of the planting bed body 410 and extend in the longitudinal direction. The blind tube 440 has a through hole that runs through along the length direction to facilitate drainage of the water body. The water inlet assembly 420 and the water outlet assembly 430 are respectively arranged opposite to each other at the longitudinal ends of the planting bed 410, wherein the water inlet assembly 420 is located above the planting bed 410, and the water outlet assembly 430 is located at the bottom wall of the planting bed 410. Preferably, the blind pipe 440 extends longitudinally to facilitate the circulation of water at the bottom of the planting bed 410, and the blind pipe 440 is arranged at intervals in the transverse direction on the bottom wall of the planting bed 410, such as being fixed by threaded fasteners, and in other embodiments, it can also be fixed by welding or other methods, and can be arranged as needed.

[0149] It can be understood that a water inlet component 420 and a water outlet component 430 are respectively provided at the longitudinal ends of the planting bed 410, and a plurality of blind pipes 440 are provided on the bottom wall of the planting bed 410. The blind pipes 440 are arranged along the longitudinal direction and can drain the water of the water inlet component 420 to the water outlet component 430, so as to facilitate the discharge of water from the bottom of the planting bed 410, improve the water flow and drainage capacity at the bottom of the planting bed, facilitate microorganisms to obtain sufficient oxygen, promote reproduction metabolism and purify water quality.

[0150] In this embodiment, in order to further facilitate the flow of water, the bottom wall of the planting bed 410 is inclined in the longitudinal direction, the water inlet assembly 420 is located at the high position of the bottom wall of the planting bed 410, and the water outlet assembly 430 is located at the low position of the bottom wall of the planting bed 410. That is, the bottom of the planting bed 410 is provided with an inclination angle with the horizontal plane, which facilitates the flow of water from high to low in the longitudinal direction, improves the flow rate of water, realizes rapid drainage of the planting bed 410, and is conducive to the microorganisms to obtain sufficient oxygen, promote reproduction metabolism and purify water quality.

[0151] In a preferred embodiment, the blind pipe 440 is a plastic blind ditch, which is a composite geodetic drainage body (GDS), also known as a three-dimensional drainage board, which is a three-dimensional porous material formed by heating and melting a thermoplastic synthetic resin, extruding fiber filaments through a nozzle, and welding the joints. The cross section of the blind pipe 440 can be a circular or rectangular structure. It can be understood that the blind pipe 440 can be smooth and pressure-resistant, and the plastic blind ditch has extremely high surface water permeability and internal water permeability, as well as excellent pressure resistance and deformation adaptability.

[0152] At the same time, a grating plate 460 is provided at one end of the planting bed 410 close to the water inlet assembly 420, and the two ends of the grating plate 460 in the length direction are respectively connected to the lateral side walls of the planting bed 410, and the grating plate 460, the lateral side walls of the planting bed 410 and the longitudinal end walls form a water pretreatment area 470, and the water body is pretreated at the front end. Preferably, the water pretreatment area 470 is filled with biochemical balls 480 to add pre-cultured microorganisms, so as to promote the rapid formation of a microbial ecosystem in the ecological planting bed 400 and save time for cultivating microorganisms. In this embodiment, the incoming water body can be pretreated, for example, biochemical balls 480 containing microorganisms such as nitrifying bacteria are placed, which can accelerate the speed of cultivating microbial ecosystems such as nitrifying bacteria in the ecological planting bed 400, thereby quickly purifying the water quality. Specifically, the water inlet assembly 420 is arranged above the planting bed 410 and is arranged opposite to the water pretreatment area 470.

[0153] like Figure 11-12 As shown, Fig.11 A schematic diagram of the structure of the water outlet assembly provided in an embodiment of the present application; Fig.12 for Fig.11 Schematic diagram of the explosion structure.

[0154] On the basis of the above embodiments, the water outlet component 430 is a siphon structure, and the water outlet component 430 includes:

[0155] The first sleeve 431 is fixed on the bottom wall of the planting bed 410. The top of the first sleeve 431 is a closed structure. The bottom of the first sleeve 431 has a siphon inlet 4311, which is connected to the inner cavity of the planting bed 410.

[0156] The drainage pipe 432 is sleeved in the first sleeve 431 , and a gap is provided between the top water inlet 4321 of the drainage pipe 432 and the top wall of the first sleeve 431 ; the bottom water outlet 4322 of the drainage pipe 432 is arranged through the bottom wall of the planting bed 410 .

[0157] The outer diameter of the drain pipe 432 is smaller than the inner diameter of the first sleeve 431, so that a gap is formed between the outer wall of the drain pipe 432 and the inner wall of the first sleeve 431 for storing water. A gap is provided between the top water inlet 4321 of the drain pipe 432 and the top wall of the inner cavity of the first sleeve 431, and the bottom water outlet 4322 of the drain pipe 432 penetrates the bottom wall of the planting bed 410 to discharge clean water from the planting bed 410. The drain pipe 432 is configured to be L-shaped to facilitate vacuum maintenance.

[0158] The water outlet assembly 430 further includes a second sleeve 433, which is sleeved on the outside of the first sleeve 431, and the inner diameter of the second sleeve 433 is larger than the outer diameter of the first sleeve 431; the second sleeve 433 is provided with filter mesh holes at a preset distance from bottom to top to filter the water entering the first sleeve 431. Preferably, the circumferential side wall of the second sleeve 433 is fully covered with filter mesh holes.

[0159] Specifically, a plurality of support frames 434 are disposed on the bottom wall of the first sleeve 431 . The support frames 434 are spaced apart along the circumference of the bottom wall of the first sleeve 431 , and a siphon liquid inlet 4311 is formed between adjacent support frames 434 and the bottom wall of the first sleeve 431 .

[0160] When the water level reaches the top water inlet 4321 of the drain pipe 432, negative pressure is formed to attract water to continuously and rapidly flow out of the inner cavity of the planting bed 410 from the top water inlet 4321 of the drain pipe 432 until the liquid level of the planting bed 410 drops to the upper surface of the liquid inlet 4311. The negative pressure effect disappears and the siphon effect stops, thereby achieving rapid discharge of liquid from the planting bed 410 without any additional power, which is economical and environmentally friendly.

[0161] It can be understood that the fish-vegetable symbiotic system may include a number of ecological planting beds 400, each of which is connected to the fermentation equipment 300 and the fish feces separation equipment 500, and a solenoid valve is provided at the water inlet component 420 of each ecological planting bed 400 to control the water inlet amount of the ecological planting bed 400; when the ecological planting bed 400 reaches the preset water inlet amount, the solenoid valve is controlled to close and stop supplying water to the current ecological planting bed; and the solenoid valve of the next ecological planting bed 400 is controlled to open, and the pipeline is controlled to supply water to the next ecological planting bed. Optionally, the fish-vegetable symbiotic system includes two ecological planting beds 400, and the two ecological planting beds 400 are respectively connected to the biodegradation equipment 200. When the water inflow of the first ecological planting bed reaches a preset water inflow, the solenoid valve of the water inflow component 420 of the first ecological planting bed is controlled to be closed, and the solenoid valve of the water inflow component 420 of the second ecological planting bed is controlled to be opened to let water flow into the second ecological planting bed. When the water inflow of the second ecological planting bed reaches a preset water inflow, the solenoid valve of the water inflow component 420 of the second ecological planting bed is controlled to be closed, and water is again let into the first ecological planting bed, and the above operation process is repeated; when the first ecological planting bed stops taking in water and the second ecological planting bed takes in water, the drainage component 420 of the first ecological planting bed drains water, so that microorganisms such as nitrifying bacteria obtain sufficient oxygen, which is beneficial to the reproduction and metabolism of microorganisms to purify water quality; and the operation rhythm can be accelerated.

[0162] The specific working process is as follows: the aquaculture sewage is pre-treated and flows into one longitudinal end of the planting bed 410 from the water inlet assembly 420, and the water flows to the other longitudinal end of the planting bed 410 through the matrix gap and the blind pipe 440, and the water level gradually rises; the water enters the gap cavity between the second sleeve 433 and the first sleeve 431 through the pores of the second sleeve 433, and flows into the gap cavity between the first sleeve 431 and the drain pipe 432 from the liquid inlet 4311 at the three support frames 434 of the first sleeve 431 at the bottom, and as the water level gradually rises to the drain pipe 4 32, and gradually discharge the air between the top water inlet 4321 and the top wall of the inner cavity of the first sleeve 431, forming a siphon to cause the water to flow out continuously and quickly, and then be discharged from the planting bed 410 through the drain pipe 432; when the water level drops to the upper end of the three support frames 434 of the first sleeve 431, the siphon stops, the drainage stops, and the matrix in the ecological planting bed 400 is fully exposed to the air, so that nitrifying bacteria and other microorganisms can obtain sufficient oxygen, thereby intermittently collecting water and draining water, which is conducive to the reproduction and metabolism of microorganisms to purify water quality. Preferably, a grid plate 460 is set on the planting bed 410 near the side of the water inlet component 420 to form a water pretreatment area 470, which can pre-treat the incoming water. For example, a biochemical ball 480 containing nitrifying bacteria and other microorganisms is placed in the planting bed 400 to accelerate the speed of cultivating nitrifying bacteria and other microbial ecosystems, thereby quickly purifying the water quality.

[0163] The above-mentioned ecological planting bed 400 realizes rapid drainage of the matrix layer 450 by setting a porous blind pipe 440 that is pressure-resistant and conducive to water flow, which is beneficial for microorganisms to obtain sufficient oxygen, promote reproduction and metabolism, and purify water quality; a front-end pretreatment system is set up for the ecological planting bed 400 to add pre-cultivated microorganisms, so as to prompt the ecological planting bed 400 to quickly form a microbial ecosystem and save time; a siphon device is set up to achieve non-powered rapid drainage.

[0164] 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.

[0165] 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 sewage treatment method based on aquaponics system, characterized in that: The method comprises: The aquaculture sewage is passed through a vertical flow separator for vertical sedimentation of particles, thereby obtaining a primary water body located above the vertical flow separator and a secondary water body located below the vertical flow separator and containing large particles; The primary water body is horizontally settled by a fish feces separation device to obtain a filtered tertiary water body and a quaternary water body containing particulate matter, and the tertiary water body is discharged into an ecological planting bed; Fermenting the secondary water body and the quaternary water body by fermentation equipment, and discharging the fermented water into the ecological planting bed; The horizontal sedimentation of the primary water body by the fish feces separation equipment specifically includes: Breaking up the particles in the primary water body, and subjecting the broken water body to gradual horizontal sedimentation; The fermentation of the secondary water body and the quaternary water body by fermentation equipment specifically includes: Filtering the secondary water body and the quaternary water body to obtain a water body containing filter residue; Fermenting the water containing the filter residue under preset fermentation conditions; The fish manure separation device is connected to the vertical flow separator, and the fish manure separation device includes a fish manure cutting assembly and a fish manure separation box with an inner cavity, the inner cavity of the fish manure separation box is longitudinally arranged with a plurality of partitions, the end walls at both ends of the fish manure separation box are respectively provided with a water inlet and a drain, the water inlet of the fish manure separation box is connected to the vertical flow separator, and sedimentation chambers are respectively formed between adjacent partitions and between the partitions and the end walls of the fish manure separation box for sedimentation and separation of fish manure; a sewage outlet is provided on the bottom wall of the fish manure separation box corresponding to any of the sedimentation chambers for discharging the settled fish manure; the fish manure cutting assembly is arranged opposite to the water inlet for cutting the fish manure; The fish excrement cutting assembly is longitudinally located in a first sedimentation chamber close to the water inlet of the fish excrement separation box, and the height of the fish excrement cutting assembly is the same as the height of the water inlet; The fish excrement cutting assembly comprises: The mounting shaft is fixedly mounted on the bottom wall of the fish excrement separation box, and the two are detachably fixedly connected; The cutting member is fixedly mounted on the mounting shaft and is used to rotate around the mounting shaft under the action of the water flow at the water inlet so as to cut the fish feces; the axis of the cutting member is colinear with the axis of the mounting shaft, and the cutting member is fixed to the mounting shaft through a bearing; the cutting member includes a turbine blade and a rotary cutting blade, the turbine blade is detachably fixedly connected to the mounting shaft, and rotates around its own axis under the drive of the water flow, and a rotary cutting blade is respectively arranged on the upper and lower sides of the turbine blade.

2. The sewage treatment method based on the fish-vegetable symbiosis system according to claim 1 is characterized in that: The method further comprises: The aquaculture wastewater is pumped into the vertical flow separator through a pumping device, the primary water body flows to the fish manure separation equipment and the ecological planting bed under the action of gravity, and the secondary water body containing large particles flows to the fermentation equipment under the action of gravity.

3. The sewage treatment method based on the fish-vegetable symbiosis system according to claim 1 is characterized in that: The method further comprises: Nitrification of water bodies in ecological planting beds.

4. A fish-vegetable symbiotic system using the sewage treatment method according to any one of claims 1 to 3, characterized in that: include: Farming equipment for farming aquatic organisms; A vertical flow separator, connected to the aquaculture equipment, for vertically settling aquaculture wastewater; A fish manure separation device is connected to the vertical flow separator, comprising a fish manure cutting assembly and a fish manure separation box having an inner cavity, wherein the inner cavity of the fish manure separation box is longitudinally arranged with a plurality of partitions, and the end walls at both ends of the fish manure separation box are respectively provided with a water inlet and a drain outlet, the water inlet of the fish manure separation box is connected to the vertical flow separator, and sedimentation chambers are respectively formed between adjacent partitions and between the partitions and the end walls of the fish manure separation box for sedimentation and separation of fish manure; a sewage outlet is provided on the bottom wall of the fish manure separation box corresponding to any of the sedimentation chambers for discharging the settled fish manure; The fish excrement cutting assembly is arranged opposite to the water inlet and is used for cutting fish excrement; A fermentation device, comprising a fermentation box, a liquid inlet device and a liquid discharge device; the inner cavity of the fermentation box is provided with a filtering device for filtering the water entering the fermentation box; the liquid inlet device is respectively connected to the sewage outlets of the vertical flow separator and the fish feces separation box, and the liquid inlet device is arranged opposite to the filtering device; the liquid discharge device is connected to the bottom of the fermentation box, and is used to discharge the water filtered by the filtering device; The ecological planting bed is respectively connected to the drainage outlet of the fish excrement separation equipment and the drainage device of the fermentation equipment.

5. The fish-vegetable symbiotic system according to claim 4, characterized in that: The breeding equipment and the fermentation equipment are located below the ground, and the vertical flow separator, the fish excrement separation equipment and the ecological planting bed are located above the ground; The top water outlet of the vertical flow separator is higher than the water inlet of the fish excrement separation device, the drainage outlet of the fish excrement separation device is higher than the ecological planting bed, and the water outlet component of the ecological planting bed is higher than the breeding equipment; The sewage from the aquaculture equipment is pumped into the vertical flow separator through a pumping device, and flows into the fish manure separation equipment and the ecological planting bed in sequence under the action of gravity, and then flows back to the aquaculture equipment.

6. The fish-vegetable symbiotic system according to claim 4, characterized in that: The fish excrement cutting assembly comprises: An installation shaft is fixed on the bottom wall of the fish excrement separation box; The cutting piece is fixed on the installation shaft and is used to rotate around the installation shaft under the action of the water flow of the water inlet to cut the fish feces.

7. The fish-vegetable symbiosis system according to claim 4, characterized in that: The fermentation equipment also includes: An internal circulation device, one end of which is connected to the fermentation box, and the other end of which is connected to the filter cavity of the filter device, and is used to transport the water filtered in the fermentation box to the filter cavity of the filter device for internal circulation; A control device is respectively connected with the internal circulation device, the liquid inlet device and the liquid discharge device.

8. The fish-vegetable symbiotic system according to claim 7, characterized in that: The liquid discharge device also includes: A drainage pipeline, one end of which is connected to the bottom of the inner cavity of the fermentation box, and the other end of which is connected to the ecological planting bed; A drainage pumping assembly is located in the fermentation box, the drainage pumping assembly is connected to the drainage pipeline, and is used to pump the water filtered by the filtering device; The discharge control valve is located on the discharge pipeline and is used to control the on-off of the discharge pipeline. The discharge pumping assembly and the discharge control valve are respectively connected to the control device.

9. The fish-vegetable symbiotic system according to claim 8, characterized in that: The internal circulation device comprises an internal circulation pipeline, one end of which is connected to the discharge pipeline via the discharge control valve; The control device controls the drain control valve to switch direction and open the internal circulation pipeline, and the liquid at the bottom of the fermentation box enters the filtering device through the drain pumping assembly, part of the drain pipeline and the internal circulation pipeline for internal circulation.

10. The fish-vegetable symbiosis system according to claim 9, characterized in that: The fermentation equipment also includes an external circulation device connected to the control device, and the external circulation device includes: An external circulation pipeline, one end of which is connected to a water source, and the other end of which is located in the inner cavity of the fermentation box and is arranged along the circumferential outer wall of the filtering device; A plurality of external circulation sprinklers are located on the external circulation pipeline and are arranged toward the outer wall of the filtering device.

11. The fish-vegetable symbiosis system according to claim 5, characterized in that: The ecological planting bed comprises: The planting bed comprises a water inlet assembly and a water outlet assembly which are arranged opposite to each other in the longitudinal direction; the water inlet assembly is respectively connected to the drainage port of the fish feces separation box and the drainage device, and the water outlet assembly is connected to the breeding equipment, and water flows from the water outlet assembly into the breeding equipment under the action of gravity; The planting bed is provided with a grid plate at one end close to the water inlet assembly, and both ends of the grid plate in the length direction are respectively connected to the lateral side walls of the planting bed to form a water pretreatment area.

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