Multi-stage reverse osmosis type salt and fresh water three-dimensional circulation ecological breeding system

Abstract

The application discloses a multi-stage reverse osmosis type brackish water three-dimensional circulation ecological breeding system based on the technical field of aquaculture water treatment, which comprises a breeding pond, a poultry excrement collecting and treating pond, a filtering and depositing pond, a multi-stage reverse osmosis nitrification pond, a multi-stage reverse osmosis depositing pond and a breeding pond; a circulating water pump of the breeding pond sends water into the filtering and depositing pond; a middle part of the poultry excrement collecting and treating pond is provided with an excrement treating structure, and an upper part and a lower part of the excrement treating structure are connected with the filtering and depositing pond and the outside through water pipes respectively; the filtering and depositing pond, the reverse osmosis nitrification pond and the multi-stage reverse osmosis depositing pond are connected in sequence to perform multi-stage physical filtration, biological nitrification and osmosis depositing treatment on water; the treated clean water enters the breeding pond through a first backwater channel, and then is backflowed to the breeding pond through a second backwater channel, so that a closed loop circulation is formed. The application realizes a three-dimensional circulation industrial system of brackish water breeding, poultry breeding and plant planting, saves water resources, effectively treats breeding waste, guarantees the quality of recycled water and truly realizes full ecological breeding.

Description

Technical Field

[0001] This invention relates to the field of aquaculture water treatment technology, specifically to a multi-stage reverse osmosis brackish water three-dimensional circular ecological farming system for treating three types of water: seawater, freshwater, and brackish water. Background Technology

[0002] Currently, in the integrated farming sector that combines aquaculture, poultry farming, and agricultural planting, the efficient utilization of water resources and the coordinated control of pollutants are the two core challenges.

[0003] Traditional farming and aquaculture models are often independent of each other. For example, if poultry manure is discharged directly without treatment, it will cause serious eutrophication pollution of the surrounding soil and water. Aquaculture, on the other hand, requires the regular replacement of large amounts of fresh or salt water to maintain water quality, resulting in huge water consumption and the production of aquaculture wastewater rich in nitrogen, phosphorus and other organic matter.

[0004] Existing ecological farming and aquaculture cycles often use simple sedimentation tanks or constructed wetlands to treat mixed wastewater. Their treatment processes are relatively simple and have limited ability to remove pollutants such as dissolved organic matter, ammonia nitrogen, nitrite and pathogens from the water. They are unable to meet the complex water quality requirements of different organisms (fish, poultry and plants) at the same time.

[0005] Especially when dealing with brackish and freshwater systems, the accumulation of salt and the stability of the nitrification process become technical challenges.

[0006] Based on this, the present invention designs a multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: Based on a multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system, including: The breeding pond has a water inlet for a circulating water pump at the lowest point of its bottom, and the other end of the circulating water pump is connected to a drain pipe. The farm, which consists of multiple breeding cages, is located in a remote mountainous area and has a poultry manure collection and treatment pond below it. The lower and upper parts of the poultry manure collection and treatment pool are respectively equipped with water pipes connecting the first poultry manure treatment pool and the second poultry manure treatment pool, and the middle part is equipped with a manure treatment structure. The filtration sedimentation tank has an internal filtration structure, and the inlet end of the filtration structure is connected to the outlet end of the drain pipe. The first poultry manure treatment tank is connected to the inlet side of the filtration sedimentation tank by a water pipe. The reverse osmosis nitrification tank has a multi-stage reverse osmosis nitrification structure inside, and the inlet side is connected to the filter sedimentation tank through an overflow pipe. One end of the overflow pipe is located in the upper part of the inner cavity of the filter sedimentation tank, and the other end is located in the lower part of the inner cavity of the reverse osmosis nitrification tank. The multi-stage reverse osmosis sedimentation tank has multiple stages of permeable media inside, and the inlet side is connected to the outlet side of the reverse osmosis nitrification tank through a pipe. The outlet side is connected to the first return water channel through the outlet pipe of the reverse osmosis sedimentation tank. The breeding pond is divided into multiple ponds. The water inlet of each breeding pond is connected to the first return water channel through a pipe. The water outlet of each breeding pond is connected to a second return water channel. The second return water channel is connected to the corresponding water inlet of the breeding pond through the breeding pond water inlet pipe.

[0009] Preferably, the filtration structure includes multiple filter bags evenly arranged in the filtration sedimentation tank, and the inlets of the multiple filter bags are all connected to the drain pipe.

[0010] Preferably, the multi-stage reverse osmosis nitrification structure includes multiple horizontal nitrification layers uniformly fixed in the reverse osmosis nitrification tank. Each nitrification layer has a vertical baffle fixed at its rear end. A parallel baffle is fixed on the rear side of the baffle. A flow guiding zone is provided between the bottom of the baffle and the reverse osmosis nitrification tank, and the top of the baffle is lower than the top of the baffle on the corresponding side.

[0011] Preferably, both the filtration sedimentation tank and the reverse osmosis nitrification tank are equipped with drain outlets and valves at the bottom.

[0012] Preferably, the fecal treatment structure includes a coarse filter layer and two fine filter layers arranged sequentially from top to bottom; The area above the coarse filtration layer is the poultry manure collection area, the area between the coarse filtration layer and the first fine filtration layer is the aerobic zone, the area between the two fine filtration layers and the area below the second fine filtration layer is the anaerobic zone, and the area below the second fine filtration layer is set as the liquid storage chamber. The inlet ends of the water pipes connecting the first and second poultry manure treatment tanks are located in the manure collection area and the liquid storage chamber, respectively.

[0013] Preferably, the poultry manure collection and treatment tank is equipped with a poultry manure treatment water pump group, and the inlet of the poultry manure treatment water pump group is connected to the lower liquid storage chamber of the poultry manure collection and treatment tank, and the outlet is connected to the upper coarse filter layer of the poultry manure collection and treatment tank.

[0014] Preferably, both the water pipes connecting the first poultry manure treatment tank and the water pipes connecting the second poultry manure treatment tank are connected to control valves.

[0015] Preferably, a slatted floor is fixed above the poultry manure collection and treatment tank, and the manure treatment structure is set below the poultry manure collection and treatment tank, so that the manure can fall into the collection tank automatically. Under the action of gravity and water pump, the manure will automatically undergo dissolution, aerobic reaction and anaerobic reaction from top to bottom, forming manure water that is discharged for use.

[0016] Preferably, both the first and second return water channels are provided with mesh covers.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention constructs a closed-loop circulation system for aquaculture water through a circulating water pump and return water channel, which greatly reduces the amount of fresh or salt water replenishment, saves water resources, reduces dependence on external water sources, and eliminates the discharge of aquaculture wastewater.

[0018] 2. This invention integrates filtration and sedimentation, multi-stage reverse osmosis nitrification and multi-stage reverse osmosis sedimentation to perform multi-stage physical filtration and biological nitrification treatment on water bodies, which can effectively remove organic matter, ammonia nitrogen and suspended solids in water, ensuring that the quality of reclaimed water is stable and meets the requirements of planting and aquaculture. 3. This invention organically integrates aquaculture, poultry farming and plant cultivation into a three-dimensional farming model, realizing the material and energy cycle among different organisms, and improving the space utilization efficiency and unit output of land and water bodies. 4. This invention uses a poultry manure collection and treatment pond to centrally treat manure, which not only avoids environmental pollution caused by direct discharge of manure, but also introduces the treated products as nutrients into the breeding pond, realizing the resource utilization of waste. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the filtration sedimentation tank and the reverse osmosis nitrification tank of the present invention; Figure 3 This is a schematic diagram of the poultry manure collection and treatment tank of the present invention.

[0021] The attached diagram lists the components represented by each number as follows: 100 - Aquaculture pond; 101 - Circulating water pump; 102 - Drainage pipe; 200-Reverse osmosis nitrification tank, 201-Baffle, 202-Nitrification base layer, 203-Water baffle, 204-Flow guide zone; 300-breeding farm; 400 - Poultry manure collection and treatment pool; 401 - Water pipe connecting the first poultry manure treatment pool; 402 - Water pipe connecting the second poultry manure treatment pool; 403 - Slatted floor; 404 - Coarse filter layer; 405 - Fine filter layer. 500 - Filtration sedimentation tank; 501 - Filter bag; 502 - Overflow pipe; 600 - Multi-stage reverse osmosis sedimentation tank; 601 - Reverse osmosis sedimentation tank outlet pipe; 602 - First return water channel; 603 - Permeable layer medium. 700 - Aquaculture pond; 701 - Aquaculture pond inlet; 800 - Second return water channel, 801 - Aquaculture pond inlet pipe, 802 - Aquaculture pond inlet. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0023] Please see the appendix Figure 1-3 The present invention provides a technical solution: Based on a multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system, it includes a 100-unit aquaculture pond, a 300-unit farm, a 400-unit poultry manure collection and treatment pond, a 500-unit filtration and sedimentation pond, a 200-unit multi-stage reverse osmosis nitrification pond, a 600-unit multi-stage reverse osmosis sedimentation pond, and a 700-unit aquaculture pond.

[0024] The aquaculture pond 100 has a depth of 2.5 meters and a length and width of 10 to 15 meters. The lowest point of the bottom is equipped with the suction port of the circulating water pump 101, and the other end of the circulating water pump 101 is connected to the drain pipe 102.

[0025] The breeding farm 300 includes multiple breeding cages located in a remote mountainous area, with a poultry manure collection and treatment pond 400 located below it. The height of the poultry manure collection and treatment pond 400 is adapted to the filtration and sedimentation pond 500.

[0026] The lower and upper parts of the poultry manure collection and treatment pool 400 are respectively provided with a first poultry manure treatment pool connecting water pipe 401 and a second poultry manure treatment pool connecting water pipe 402, and the middle part is provided with a manure treatment structure; both the first poultry manure treatment pool connecting water pipe 401 and the second poultry manure treatment pool connecting water pipe 402 are connected to control valves.

[0027] The sedimentation tank 500 is equipped with a filtration structure, and the inlet end of the filtration structure is connected to the outlet end of the drain pipe 102. The first poultry manure treatment tank is connected to the sedimentation tank 500 via a water pipe 401.

[0028] The reverse osmosis nitrification tank 200 has a multi-stage reverse osmosis nitrification structure inside, and the inlet side is connected to the filter sedimentation tank 500 through the overflow pipe 502. One end of the overflow pipe 502 is located in the upper part of the inner cavity of the filter sedimentation tank 500, and the other end is located in the lower part of the inner cavity of the reverse osmosis nitrification tank 200. Both the filter sedimentation tank 500 and the reverse osmosis nitrification tank 200 are equipped with a drain outlet and a valve at the bottom.

[0029] The multi-stage reverse osmosis sedimentation tank 600 has a permeable layer medium 603 inside, and its inlet side is connected to the outlet side of the reverse osmosis nitrification tank 200 through a pipe. The outlet side is connected to the first return water channel 602 through the reverse osmosis sedimentation tank outlet pipe 601. The multi-stage reverse osmosis sedimentation tank 600 has no less than 5 stages, and its interior is filled with gravel, sand, and ceramsite as the permeable layer medium 603. Aquatic plants are planted in the tank.

[0030] The water depth of the breeding pond 700 is 30 cm to 1 meter, and it is suitable for planting in fresh water, brackish water or seawater. It is divided into multiple ponds, and the water inlet 701 of each pond is connected to the first return water channel 602 through a pipe. The water outlet of each pond is connected to a second return water channel 800, and the second return water channel 800 is connected to the corresponding water inlet 802 of the breeding pond 100 through the breeding pond water inlet pipe 801.

[0031] Among them, the 700-cell aquaculture pond is used for planting water spinach, water celery, lettuce, etc. when used in freshwater or brackish water; and for planting marine algae or marine plants when used in seawater.

[0032] When the system is working, poultry manure is centrally treated in the poultry manure collection and treatment pond 400 to avoid direct discharge and environmental pollution, and the treated products can provide nutrients for the breeding pond 700. Water in the breeding pond 100 and the poultry manure collection and treatment pond 400 is transported through corresponding pipelines and undergoes multi-stage physical filtration, biological nitrification and further infiltration sedimentation through the sequentially set filtration sedimentation pond 500, reverse osmosis nitrification pond 200 and multi-stage reverse osmosis sedimentation pond 600 to ensure that the quality of the recycled water meets the requirements of breeding and aquaculture. The system of this invention achieves closed-loop circulation of aquaculture water through circulating water pump 101, first return water channel 602 and second return water channel 800, which can significantly reduce the amount of fresh or salt water replenishment and conserve water resources significantly (except for system leakage and water surface evaporation, there is basically no need for replenishment); and integrates aquaculture, poultry farming and plant planting into one, forming a three-dimensional ecological farming model, which improves the utilization efficiency of land and water bodies; the functional units are connected in an orderly manner through pipelines, the water flow path is clear, which is convenient for control and maintenance, and the system has high stability.

[0033] The filtration structure includes multiple filter bags 501 evenly arranged in the filtration sedimentation tank 500, and the inlets of the multiple filter bags 501 are all connected to the drain pipe 102.

[0034] The multi-stage reverse osmosis nitrification structure includes multiple horizontal nitrification substrates 202 uniformly fixed in the reverse osmosis nitrification tank 200. Each nitrification substrate 202 has a vertical baffle 201 fixed at its rear end. A parallel baffle 203 is fixed on the rear side of the baffle 201. A flow guiding zone 204 is provided between the bottom of the baffle 203 and the reverse osmosis nitrification tank 200. The top of the baffle 201 is lower than the top of the baffle 203 on the corresponding side.

[0035] The multi-stage reverse osmosis nitrification structure forms an up-and-down flow path in the reverse osmosis nitrification tank 200, which effectively prolongs the contact time between the water and the nitrification substrate 202, thereby improving the nitrification efficiency; and the horizontal nitrification substrate 202 provides a large-area biofilm carrier, which is conducive to the growth of nitrifying bacteria.

[0036] The fecal treatment structure includes a coarse filter layer 404 and two fine filter layers 405 arranged sequentially from top to bottom. The area above the coarse filter layer 404 is the poultry manure collection area, the area between the coarse filter layer 404 and the first fine filter layer 405 is the aerobic zone, the area between the two fine filter layers 405 and the area below the second fine filter layer 405 is the anaerobic zone, and the area below the second fine filter layer 405 is set as the liquid storage chamber. The inlet ends of the first poultry manure treatment tank connecting water pipe 401 and the second poultry manure treatment tank connecting water pipe 402 are located in the manure collection area and the liquid storage chamber, respectively.

[0037] The above structure achieves rapid solid-liquid separation of feces through a coarse filtration layer 404 intercepting large solid particles and a fine filtration layer 405 further separating suspended solids. The aerobic zone promotes the degradation of organic matter by aerobic microorganisms, while the anaerobic zone performs anaerobic digestion. This aerobic-anaerobic coupling significantly improves the total organic matter removal rate. Example 2

[0038] The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that the poultry manure collection and treatment tank 400 is equipped with a poultry manure treatment water pump group. The inlet of the poultry manure treatment water pump group is connected to the lower part of the poultry manure collection and treatment tank 400, and the outlet is connected to the upper part of the poultry manure collection and treatment tank 400. This allows the lower part of the manure liquid to be pumped to the upper part, realizing circulation and stirring, accelerating the dissolution of solid matter, increasing dissolved oxygen, promoting aerobic decomposition, and forming a circulating mixture in the tank. Example 3

[0039] The structure of this embodiment is basically the same as that of embodiment one. The difference is that a slatted floor 403 is fixed above the poultry manure collection and treatment tank 400, and the manure treatment structure is set inside the poultry manure collection and treatment tank 400, so that manure can fall into the collection tank automatically. Under the action of gravity and water pump, it automatically undergoes dissolution, aerobic reaction and anaerobic reaction from top to bottom to form manure water for discharge and use. Example 4

[0040] The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that the width of the first return water channel 602 and the second return water channel 800 is 1 meter, and both are equipped with a grid cover plate on the top, which allows people to walk and effectively prevents people or animals from accidentally falling into the channel. It is especially suitable for open or semi-underground layouts and improves on-site safety.

[0041] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system, characterized in that, include: The breeding pond (100) has a water inlet for a circulating water pump (101) at its lowest point, and the other end of the circulating water pump (101) is connected to a drain pipe (102). A poultry farm (300) includes multiple poultry cages, with poultry manure collection and treatment ponds (400) located beside or below them. The lower and upper parts of the poultry manure collection and treatment pool (400) are respectively provided with a first poultry manure treatment pool connecting water pipe (401) and a second poultry manure treatment pool connecting water pipe (402), and the middle part is provided with a manure treatment structure; The filtration sedimentation tank (500) has a filtration structure inside, and the inlet end of the filtration structure is connected to the outlet end of the drain pipe (102). The connection between the first poultry manure treatment tank connecting water pipe (401) and the filtration sedimentation tank (500) is as follows: The reverse osmosis nitrification tank (200) has a multi-stage reverse osmosis nitrification structure inside, and the inlet side is connected to the filter sedimentation tank (500) through an overflow pipe (502). One end of the overflow pipe (502) is located in the upper part of the inner cavity of the filter sedimentation tank (500), and the other end is located in the lower part of the inner cavity of the reverse osmosis nitrification tank (200). The multi-stage reverse osmosis sedimentation tank (600) is equipped with a multi-stage permeation medium (603) inside, and the inlet side is connected to the outlet side of the reverse osmosis nitrification tank (200) through a pipe. The outlet side is connected to the first return water channel (602) through the outlet pipe (601) of the reverse osmosis sedimentation tank. The breeding pond (700) is divided into multiple ponds. The inlet (701) of each pond is connected to the first return water channel (602) through a pipe. The outlet of each pond is connected to a second return water channel (800). The second return water channel (800) is connected to the corresponding inlet (802) of the breeding pond (100) through the breeding pond inlet pipe (801).

2. The multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system according to claim 1, characterized in that: The filtration structure includes multiple filter bags (501) uniformly arranged in a filtration sedimentation tank (500), and the inlets of the multiple filter bags (501) are all connected to the drain pipe (102).

3. The multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system according to claim 1, characterized in that: The multi-stage reverse osmosis nitrification structure includes multiple horizontal nitrification substrates (202) uniformly fixed in the reverse osmosis nitrification tank (200). Each nitrification substrate (202) has a vertical baffle (201) fixed at its rear end. A parallel baffle (203) is fixed on the rear side of the baffle (201). A flow guiding zone (204) is provided between the bottom of the baffle (203) and the reverse osmosis nitrification tank (200). The top of the baffle (201) is lower than the top of the baffle (203) on the corresponding side.

4. The multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system according to claim 1, characterized in that: Both the bottom of the filtration sedimentation tank (500) and the reverse osmosis nitrification tank (200) are equipped with drain outlets and valves.

5. The multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system according to claim 1, characterized in that: The fecal treatment structure includes a coarse filter layer (404) and two fine filter layers (405) arranged from top to bottom. The area above the coarse filter layer (404) is a poultry manure collection area, the area between the coarse filter layer (404) and the first fine filter layer (405) is an aerobic area, the area between the two fine filter layers (405) and below the second fine filter layer (405) is an anaerobic area, and the area below the second fine filter layer (405) is a liquid storage chamber. The inlet ends of the first poultry manure treatment tank connecting water pipe (401) and the second poultry manure treatment tank connecting water pipe (402) are located in the manure collection area and the liquid storage chamber, respectively.

6. The multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system according to claim 1, characterized in that: The poultry manure collection and treatment tank (400) is equipped with a poultry manure treatment water pump group, and the inlet of the poultry manure treatment water pump group is connected to the lower liquid storage chamber of the poultry manure collection and treatment tank (400), and the outlet is connected to the upper coarse filter layer of the poultry manure collection and treatment tank (400).

7. The multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system according to claim 1, characterized in that: Both the first poultry manure treatment tank connecting water pipe (401) and the second poultry manure treatment tank connecting water pipe (402) are connected to control valves.

8. The multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system according to claim 1, characterized in that: A slatted floor (403) is fixedly installed above the poultry manure collection and treatment pool (400), and the manure treatment structure is located below the poultry manure collection and treatment pool (400).

9. The multi-stage reverse osmosis brackish water three-dimensional cycle ecological farming system according to claim 1, characterized in that: The top of both the first return water channel (602) and the second return water channel (800) is provided with a mesh cover plate.

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