In-situ natural decomposition test device and test method for fish manure

Abstract

This application proposes an in-situ natural decomposition test device and method for fish feces. The test device includes a net cage made of nylon mesh with an internal cavity and a feeding port at the top, which communicates with the cavity. A fixed frame houses the net cage, and the net cage is movably connected to the fixed frame. A feeding fixing device is located at the top of the fixed frame, which connects the fixed frame to the aquaculture net cage. This application utilizes the in-situ natural decomposition test device to efficiently and in real-time observe the decomposition of fresh fish feces in marine ranches, thereby assessing the impact of fish feces accumulation on the surrounding marine environment.

Description

Technical Field

[0001] This application relates to the field of marine aquaculture technology, and in particular to a test device and test method for in-situ natural decomposition of fish feces. Background Technology

[0002] To verify the natural decomposition time of fresh fish feces in seawater during marine ranching and to assess the environmental impact of fish feces accumulation on nearby waters, in-situ dissipation tests of fresh fish feces in the marine ranching area are needed. However, existing technologies do not include in-situ dissipation tests of fresh fish feces in marine ranching, making it impossible to verify the natural decomposition time of fresh fish feces in seawater during marine ranching. Summary of the Invention

[0003] This application provides an in-situ natural decomposition test device and method for fish feces to solve the problems existing in related technologies. The technical solution is as follows:

[0004] In a first aspect, embodiments of this application provide an in-situ natural decomposition test device for fish feces, comprising:

[0005] The cage is made of nylon mesh and has an internal cavity. The top of the cage has a delivery port that is connected to the cavity.

[0006] A fixed frame is used, with the net cage placed inside. The net cage is movably connected to the fixed frame, and a launching fastener is provided on the top of the fixed frame. The fixed frame is connected to the aquaculture net cage through the launching fastener.

[0007] In one embodiment, the cage is provided with a movable connecting part, and the fixed frame is provided with a movable connecting component, and the movable connecting part and the movable connecting component are movably connected.

[0008] In one implementation, the active connection component includes:

[0009] The connecting rod has its bottom fixed to the fixed frame, and the movable connecting part passes through the top of the connecting rod and is sleeved on the connecting rod.

[0010] The movable connecting latch is movably connected to the connecting rod. The movable connecting part is sleeved on the connecting rod and is clamped onto the connecting rod by the movable connecting latch.

[0011] In one embodiment, the movable connection latch includes:

[0012] Locking and fixing shaft;

[0013] The first clamping part is hinged to the locking fixing shaft, and the first clamping part has a first clamping groove.

[0014] The second clamping part is hinged to the locking fixing shaft. The second clamping part has a second clamping groove, which is arranged opposite to the first clamping groove. The first clamping part and the second clamping part clamp the connecting rod inside the first clamping groove and the second clamping groove.

[0015] In one embodiment, the movable connecting latch further includes two latch connecting plates, with two first clamping parts and two second clamping parts. The two first clamping parts are respectively hinged to both ends of the latch fixing shaft, and the two second clamping parts are respectively hinged to both ends of the latch fixing shaft. The two ends of one latch connecting plate are respectively connected to the two first clamping parts, and the two ends of the other latch connecting plate are respectively connected to the two second clamping parts.

[0016] In one embodiment, the fixed frame includes a frame base plate, multiple frame support rods and a top fixing ring. The frame base plate and the top fixing ring are arranged opposite to each other. The two ends of the multiple frame support rods are respectively connected to the frame base plate and the top fixing ring. The frame base plate has a through hole in the middle. The net cage is placed above the through hole, and the placement fixing member is fixed to the top fixing ring.

[0017] In one embodiment, the bottom of the connecting rod is fixed to the base plate of the frame, and the connecting rod is positioned near the through hole.

[0018] Secondly, embodiments of this application provide a method for in-situ natural digestion of fish feces. The method employs the in-situ natural digestion apparatus described in any of the above-mentioned embodiments and includes the following steps:

[0019] Collecting fresh fish waste from marine ranches;

[0020] Freshly collected fish feces were placed into net cages of multiple fish feces in-situ natural decomposition test devices through the inlet, and the inlet was then sealed.

[0021] Steel wire ropes were attached to a fixed frame, with one end of the ropes tied to the aquaculture cages. Multiple fish excrement in-situ natural decomposition test devices were then deployed in different areas of the aquaculture ranch's sea area.

[0022] Regularly observe and record the decomposition of fresh fish feces in the in-situ natural decomposition test device.

[0023] In one embodiment, after deploying multiple fish manure in-situ natural decomposition test devices in different areas of the aquaculture farm, the method further includes:

[0024] Deploy current meters, wave meters, and tide meters in the marine ranch area;

[0025] During the observation of fresh fish feces in the in-situ natural decomposition test device, monitoring information from flow rate meter, wave meter and tide meter was obtained.

[0026] In one embodiment, the weight of fresh fish feces placed in the net cage of the fish feces in-situ natural decomposition test device is not less than 60g, and the fish feces in-situ natural decomposition test device is placed in the sea area of ​​the aquaculture farm for two to three months.

[0027] The advantages or beneficial effects of the above technical solutions include at least the following:

[0028] The fish manure in-situ natural decomposition experimental device of the present invention includes a net cage and a fixed frame. The net cage is made of nylon mesh and has a delivery port. The net cage is movably connected to the fixed frame, and the fixed frame is equipped with a delivery fixing component. When using this device to conduct in-situ natural decomposition experiments of fish manure in a marine ranch, fresh fish manure is first collected from the marine ranch. The collected fresh fish manure is then delivered into the net cage through the delivery port. Next, a steel wire rope is attached to the delivery fixing component, and one end of the steel wire rope is tied to the aquaculture net cage. The device is then deployed to different areas of the aquaculture ranch. Finally, the decomposition of the fresh fish manure in the device is observed and recorded periodically. This invention allows for real-time and efficient observation of the in-situ decomposition of fresh fish manure in marine ranches, thereby assessing the impact of fish manure accumulation on the surrounding marine environment.

[0029] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0030] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0031] Figure 1 A schematic diagram of the experimental device for in-situ natural decomposition of fish feces;

[0032] Figure 2 Another schematic diagram of the experimental device for the in-situ natural decomposition of fish feces;

[0033] Figure 3 This is a schematic diagram of the cage structure;

[0034] Figure 4 This is a structural diagram of the movable connecting latch;

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Net cage; 2. Fixed frame; 11. Accommodating cavity; 12. Drop-off port; 3. Drop-off fixing component; 13. Movable connecting part; 4. Movable connecting assembly; 41. Connecting rod; 42. Movable connecting buckle; 421. Buckle fixing shaft; 422. First clamping part; 423. Second clamping part; 424. First clamping groove; 425. Second clamping groove; 426. Buckle connecting plate; 427. Connecting hole; 428. Protrusion; 21. Frame base plate; 22. Frame support rod; 23. Top fixing ring; 24. Through hole. Detailed Implementation

[0037] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0038] Example 1:

[0039] like Figures 1 to 4 As shown in the figure, this application provides an in-situ natural decomposition test device for fish manure, including a net cage 1 and a fixed frame 2. The net cage 1 is made of nylon mesh and has an internal cavity 11. The top of the net cage 1 has a feeding port 12, which communicates with the cavity 11. The net cage 1 is placed inside the fixed frame 2, and the net cage 1 is movably connected to the fixed frame 2. A feeding fixing element 3 is provided at the top of the fixed frame 2, and the fixed frame 2 is connected to the aquaculture net cage through the feeding fixing element 3.

[0040] When conducting in-situ natural decomposition experiments of fish feces using this fish feces in-situ natural decomposition test device in a marine ranch, fresh fish feces are first collected from the marine ranch. The collected fresh fish feces are then placed into net cage 1 through the inlet 12. Next, a steel wire rope is attached to the placement fixing component 3, with one end of the wire rope tied to the aquaculture net cage. The fish feces in-situ natural decomposition test device is then deployed to different areas of the aquaculture ranch's marine environment. Finally, the decomposition of fresh fish feces in the test device is observed and recorded periodically. This embodiment allows for real-time and efficient observation of the in-situ decomposition of fresh fish feces in a marine ranch, thereby assessing the impact of fish feces accumulation on the surrounding marine environment.

[0041] In one embodiment, the net cage 1 is made of 1000-mesh nano-grade nylon mesh, and its dimensions are 25cm*25cm*47cm. Because the net cage 1 is made of 1000-mesh nano-grade nylon mesh, fresh fish waste can be placed inside the net cage 1 without leakage, and without affecting the decomposition of the fresh fish waste. Since the net cage 1 has a discharge port 12, to prevent fresh fish waste from flowing out of the discharge port 12, after placing the fresh fish waste in the net cage 1, the discharge port 12 can be sealed using a portable electric sewing machine. Preferably, the width of the discharge port 12 is 2cm, and the discharge port 12 can be a square discharge port 12.

[0042] In one embodiment, to achieve a movable connection between the net cage 1 and the fixed frame 2, a movable connecting part 13 is provided on the net cage 1, and a movable connecting component 4 is provided on the fixed frame 2. The movable connecting part 13 and the movable connecting component 4 are movably connected. Further, the movable connecting part 13 can be a movable connecting sleeve, which is also made of nylon mesh. The movable connecting sleeve is sewn onto the four sides of the net cage 1, and both ends of the movable connecting sleeve have openings.

[0043] Specifically, the movable connecting assembly 4 includes a connecting rod 41 and a movable connecting latch 42. The bottom of the connecting rod 41 is fixed to the fixed frame 2, and the movable connecting part 13 passes through the top of the connecting rod 41 and is fitted onto it. The movable connecting latch 42 is movably connected to the connecting rod 41. After the movable connecting part 13 is fitted onto the connecting rod 41, it is clamped onto the connecting rod 41 by the movable connecting latch 42.

[0044] Since the movable connecting part 13 is a movable connecting sleeve and has openings at both ends, it is relatively easy to fit the movable connecting sleeve onto the connecting rod 41. Since there are four movable connecting parts 13, the number of movable connecting components 4 is also set to four, with the four movable connecting sleeves respectively fitted onto the four connecting rods 41 of the four movable connecting components 4.

[0045] In one embodiment, to achieve the clamping and fixing of the movable connecting part 13 on the connecting rod 41, the movable connecting latch 42 includes a latch fixing shaft 421, a first clamping part 422, and a second clamping part 423. The first clamping part 422 is hinged to the latch fixing shaft 421 and has a first clamping groove 424. The second clamping part 423 is also hinged to the latch fixing shaft 421 and has a second clamping groove 425. The second clamping groove 425 is disposed opposite to the first clamping groove 424, and the first clamping part 422 and the second clamping part 423 clamp the connecting rod 41 within the first clamping groove 424 and the second clamping groove 425.

[0046] In one embodiment, in order to ensure that the first clamping part 422 and the second clamping part 423 can remain stable after clamping the movable connecting part 13 onto the connecting rod 41, the frictional force at the hinge point between the first clamping part 422, the second clamping part 423 and the locking fixing shaft 421 can be increased, and the roughness of the hinge contact surface can be increased so that the positions of the first clamping part 422 and the second clamping part 423 remain unchanged without the application of external force.

[0047] To ensure a more secure fixation of the movable connecting part 13 to the connecting rod 41, the movable connecting latch 42 further includes two latch connecting plates 426. There are two first clamping parts 422 and two second clamping parts 423. The two first clamping parts 422 are hinged to both ends of the latch fixing shaft 421, and the two second clamping parts 423 are hinged to both ends of the latch fixing shaft 421. One latch connecting plate 426 has its two ends connected to the two first clamping parts 422, and the other latch connecting plate 426 has its two ends connected to the two second clamping parts 423.

[0048] To connect the locking connecting plate 426 to the two first clamping parts 422 and to the two second clamping parts 423, connecting holes 427 are provided on both the first clamping parts 422 and the second clamping parts 423. Simultaneously, protrusions 428 are provided at both ends of the locking connecting plate 426, and these protrusions 428 mate with the connecting holes 427. By inserting the protrusions at both ends of the locking connecting plate 426 into the connecting holes 427 on the two first clamping parts 422, the connection between the locking connecting plate 426 and the two first clamping parts 422 is achieved. Similarly, by inserting the protrusions 428 at both ends of the locking connecting plate 426 into the connecting holes 427 on the two second clamping parts 423, the connection between the locking connecting plate 426 and the two second clamping parts 423 is achieved.

[0049] Preferably, each connecting rod 41 is clamped with two movable connecting buckles 42, and the two movable connecting buckles 42 are respectively located at both ends of the connecting rod 41, thereby clamping both ends of the movable connecting part 13 so that both ends of the movable connecting part 13 can be firmly fixed.

[0050] In other embodiments, a spring can be provided between the first clamping part 422 and the second clamping part 423. After the movable connecting latch 42 is clamped onto the connecting rod 41, when the first clamping part 422 and the second clamping part 423 are released, the first clamping part 422 and the second clamping part 423 generate a clamping force under the elastic force of the elastic member, thereby clamping the movable connecting latch 42 onto the connecting rod 41. After unlocking the latch, the net cage 1 can be directly removed from the fixed frame 2.

[0051] In one embodiment, the fixed frame 2 includes a frame base plate 21, a plurality of frame support rods 22, and a top fixing ring 23. The frame base plate 21 and the top fixing ring 23 are arranged opposite to each other. The two ends of the plurality of frame support rods 22 are respectively connected to the frame base plate 21 and the top fixing ring 23, and the plurality of frame support rods 22 are spaced apart. The frame base plate 21 has a through hole 24 in the middle. The net cage 1 is placed above the through hole 24, and the placement fixing member 3 is fixed to the top fixing ring 23.

[0052] Both the fixed frame 2 and the movable connecting component 4 can be made of 304 stainless steel, and the overall shape of the fixed frame 2 is set as a cylindrical structure, with the net cage 1 placed in the middle of the cylindrical structure. The fixed frame 2 serves to shape and protect the net cage 1, and the overall weight of the fixed frame 2 and the net cage 1 combined is approximately 18kg. The frame support rod 22 can be connected to the frame base plate 21 and the top fixing ring 23 by welding or other methods.

[0053] The bottom of the connecting rod 41 is fixed to the frame base plate 21, and the connecting rod 41 is positioned near the through hole 24. In order to connect the connecting rod 41 to the frame base plate 21, the bottom of the connecting rod 41 can be fixed with a nut after passing through the frame base plate 21, thereby fixing the connecting rod 41 to the frame base plate 21.

[0054] In one embodiment, the placement fixing element 3 is a fixed ear hanger, and there are four placement fixing elements 3. The four placement fixing elements 3 are evenly distributed on the top fixing ring 23. By attaching steel wire ropes to the four placement fixing elements 3, the fish manure in-situ natural decomposition test device can be connected to the aquaculture net cage, thereby facilitating the recovery of the fish manure in-situ natural decomposition test device and the observation of the fish manure decomposition.

[0055] Example 2:

[0056] The following describes this embodiment in detail with reference to Example 1:

[0057] This application provides a method for in-situ natural digestion of fish feces. The method uses the in-situ natural digestion apparatus described in Embodiment 1 above, and includes the following steps:

[0058] Collecting fresh fish waste from marine ranches;

[0059] Freshly collected fish feces are loaded into net cages 1 of multiple fish feces in-situ natural decomposition test devices through the loading port 12, and the loading port 12 is sealed.

[0060] A steel wire rope was attached to the fixed frame 2, with one end of the steel wire rope attached to the aquaculture cage. Multiple fish excrement in-situ natural decomposition test devices were then deployed in different areas of the aquaculture ranch sea area.

[0061] Regularly observe and record the decomposition of fresh fish feces in the in-situ natural decomposition test device.

[0062] In this in-situ natural decomposition test device, the weight of fresh fish feces placed in net cage 1 should be no less than 60g. After the fish feces are placed, the placement opening 12 on net cage 1 should be sealed using a portable electric sewing machine. Next, a steel wire rope should be tied to the placement fixing part 3 of the fixing frame 2, with one end of the steel wire rope attached to the aquaculture net cage. Then, the in-situ natural decomposition test device should be slowly placed on the seabed or in the middle layer of seawater. Multiple in-situ natural decomposition test devices can be set up and placed in different locations in the marine ranch to observe the decomposition of fish feces at different locations. Before placing the in-situ natural decomposition test devices, they need to be numbered.

[0063] The in-situ natural decomposition test device for fish feces was deployed in the sea area of ​​the aquaculture farm for two to three months. The decomposition of fish feces at each observation point was checked and recorded regularly, and the entire test process was recorded by taking photos and audio-visual materials.

[0064] After deploying multiple in-situ natural decomposition test devices for fish feces in different areas of the aquaculture farm, the following was also included:

[0065] Deploy current meters, wave meters, and tide meters in the marine ranch area;

[0066] During the observation of fresh fish feces in the in-situ natural decomposition test device, monitoring information from flow rate meter, wave meter and tide meter was obtained.

[0067] By monitoring current velocity information with a current meter, wave information with a wave meter, and tide level information with a tide meter, we can obtain the impact of the monitored information on the dissipation rate of fish feces, summarize the boundary conditions for fish feces dissipation, and explore the regularity of fish feces dissipation in deep-sea aquaculture.

[0068] After the in-situ natural decomposition test of fish feces is completed, the in-situ natural decomposition test device of fish feces is extracted from the sea, and then the movable connecting lock 42 is loosened, the net cage 1 is removed, and the in-situ natural decomposition test device of fish feces is disposed of.

[0069] This embodiment uses an in-situ natural decomposition test device for fish feces to conduct real-time and efficient observation of the in-situ decomposition of fresh fish feces in marine ranches, thereby assessing the impact of fish feces accumulation in marine ranches on the surrounding marine environment.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for in-situ natural decomposition of fish feces, using an in-situ natural decomposition test device for fish feces, characterized in that, The in-situ natural decomposition test device for fish feces includes: A wire mesh cage, the wire mesh cage being made of nylon mesh, the wire mesh cage having an internal cavity, and an insertion port at the top of the wire mesh cage, the insertion port being connected to the internal cavity; A fixed frame is provided, the net cage is placed inside the fixed frame, the net cage is movably connected to the fixed frame, the top of the fixed frame is provided with a launching fixing component, and the fixed frame is connected to the aquaculture net cage through the launching fixing component; The in-situ natural decomposition test method for fish feces includes the following steps: Collecting fresh fish waste from marine ranches; The collected fresh fish feces are loaded into the net cages of the multiple fish feces in-situ natural decomposition test devices through the loading port, and the loading port is then sealed. A steel wire rope is attached to the fixed frame, with one end of the steel wire rope attached to the aquaculture cage, and multiple fish excrement in-situ natural decomposition test devices are placed in different areas of the aquaculture ranch sea area; Regularly observe and record the decomposition of fresh fish feces in the in-situ natural decomposition test device. After deploying multiple of the aforementioned fish feces in-situ natural decomposition experimental devices in different areas of the aquaculture ranch sea area, the method further includes: Current meters, wave meters, and tide meters were deployed in different areas of the aquaculture ranch's sea area. During the observation of fresh fish feces in the in-situ natural decomposition test device, monitoring information from the flow velocity meter, the wave meter, and the tide meter was obtained. The flow velocity information was monitored by the flow velocity meter, the wave information was monitored by the wave meter, and the tide level information was monitored by the tide meter. The influence of the above-mentioned monitored information on the fish feces dissipation rate was obtained, the boundary conditions for fish feces dissipation were summarized, and the regularity of fish feces dissipation in deep-sea aquaculture was explored.

2. The method for in-situ natural decomposition of fish feces according to claim 1, characterized in that, The cage is provided with a movable connecting part, and the fixed frame is provided with a movable connecting component. The movable connecting part is movably connected to the movable connecting component.

3. The method for in-situ natural decomposition of fish feces according to claim 2, characterized in that, The active connection component includes: A connecting rod, the bottom of which is fixed to the fixed frame, and the movable connecting part passing through the top of the connecting rod and sleeved on the connecting rod; A movable connecting latch is movably connected to the connecting rod. After the movable connecting part is sleeved on the connecting rod, the movable connecting part is clamped on the connecting rod by the movable connecting latch.

4. The method for in-situ natural decomposition of fish feces according to claim 3, characterized in that, The movable connection latch includes: Locking and fixing shaft; A first clamping part is hinged to the locking fixing shaft, and the first clamping part has a first clamping groove. The second clamping part is hinged to the locking fixing shaft. The second clamping part has a second clamping groove, which is disposed opposite to the first clamping groove. The first clamping part and the second clamping part clamp the connecting rod inside the first clamping groove and the second clamping groove.

5. The method for in-situ natural decomposition of fish feces according to claim 4, characterized in that, The movable connecting latch also includes two latch connecting plates. There are two first clamping parts and two second clamping parts. The two first clamping parts are respectively hinged to both ends of the latch fixing shaft, and the two second clamping parts are respectively hinged to both ends of the latch fixing shaft. The two ends of one latch connecting plate are respectively connected to the two first clamping parts, and the two ends of the other latch connecting plate are respectively connected to the two second clamping parts.

6. The method for in-situ natural decomposition of fish feces according to claim 3, characterized in that, The fixed frame includes a frame base plate, multiple frame support rods and a top fixing ring. The frame base plate and the top fixing ring are arranged opposite to each other. The two ends of the multiple frame support rods are respectively connected to the frame base plate and the top fixing ring. The frame base plate has a through hole in the middle. The net cage is placed above the through hole. The delivery fixing member is fixed to the top fixing ring.

7. The method for in-situ natural decomposition of fish feces according to claim 6, characterized in that, The bottom of the connecting rod is fixed to the base plate of the frame, and the connecting rod is positioned close to the through hole.

8. The method for in-situ natural decomposition of fish feces according to claim 1, characterized in that, The weight of fresh fish feces placed in the net cage of the in-situ natural decomposition test device is not less than 60g, and the in-situ natural decomposition test device is placed in the sea area of ​​the aquaculture farm for two to three months.

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