A recirculating aquaculture system for chiton and method of use

Abstract

The present application relates to a kind of circulating water aquaculture system of petrosiidae and use method.Pertains to the aquaculture technical field of petrosiidae, including petrosiidae aquaculture box, the petrosiidae aquaculture box is placed in the placement cavity of aquaculture frame, the petrosiidae aquaculture box includes aquaculture groove and aquaculture cover plate, the aquaculture groove includes shelter area, slope area and inner bottom, the shelter area is at high position and is provided with shelter baffle, the inner bottom is at low position, the slope area is connected shelter area and inner bottom and has preset inclination, the inner bottom of the aquaculture groove is provided with water outlet, water outlet is connected with circulating water system, the output end of the circulating water system is in the form of spray and is output to the upper of petrosiidae aquaculture box.The present application provides the habitat and growth space of simulating natural environment for petrosiidae, and it is conducive to its healthy growth.Circulating water system ensures the excellent and recycling of water quality by the synergistic effect of each processing device, and reduces the cost of aquaculture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of breeding of Onchidiidae, in particular, relates to a circulating water breeding system of Onchidiidae and a use method thereof. BACKGROUND

[0002] Onchidiidae belongs to the phylum of mollusca, the class of gastropods, the sub-class of pulmonata, and is distributed in intertidal zone to supratidal mangrove area. Onchidiidae is a high-protein and low-fat marine product, rich in amino acids with reasonable composition ratio, rich in mineral elements, and contains vitamins A, D, B1 and E, and has high nutritional value. In addition, Onchidiidae has high medicinal value and plays an important role in treating asthma, improving eyesight, eliminating fatigue, promoting mammary gland secretion, etc. At the same time, Onchidiidae is also a new material for developing natural tumor treatment drugs. Therefore, Onchidiidae has high economic value and market potential. Unlike other shellfish, Onchidiidae is soft and has no shell, and mainly breathes through the lung hole, and likes dark and humid environment. Therefore, it is difficult to breed Onchidiidae by traditional shellfish breeding methods. At present, Onchidiidae in the market is obtained by wild capture. Due to overcapture, Onchidiidae resources are scarce, and it is urgent to carry out artificial breeding of Onchidiidae. SUMMARY

[0003] According to the above technical problems, a circulating water breeding system of Onchidiidae and a use method thereof are provided. The present application can carry out water circulation disinfection during breeding, and is convenient for replacing mud and sand, provides a clean and humid growth environment for Onchidiidae, and realizes the purpose of artificial breeding.

[0004] The technical means adopted by the present application are as follows:

[0005] A circulating water breeding system of Onchidiidae, comprising an Onchidiidae breeding tank, wherein the Onchidiidae breeding tank is placed in a placing cavity of a breeding rack, the Onchidiidae breeding tank comprises a breeding tank and a breeding cover plate, the breeding tank comprises a shielding area, a slope area and an inner bottom, the shielding area is at a high position and is provided with a shielding baffle, the inner bottom is at a low position, the slope area connects the shielding area and the inner bottom and has a preset inclination, a water outlet is arranged on the inner bottom of the breeding tank, the water outlet is connected with a circulating water system, and an output end of the circulating water system outputs in a spraying form above the Onchidiidae breeding tank.

[0006] Further, the circulating water system comprises a first water filtering pipe arranged at the bottom end of the culture tank, the first water filtering pipe is connected to the water inlet of the microfilter through a drain pipe, the outlet of the microfilter is connected to the water inlet of the nitrifying biological reactor through a drain pipe, the water outlet of the nitrifying biological reactor is connected to the water inlet of the ultraviolet sterilization device through a drain pipe, the water outlet of the ultraviolet sterilization device is connected to the first water storage tank through a drain pipe, the first water storage tank is internally provided with a water pump, the water pump is connected to the second water storage tank through a water inlet pipe, the top of the second water storage tank is provided with an overflow pipe, the bottom of the second water storage tank is connected to the spraying device through a water outlet pipe, the spraying device is installed on the inner side above the placing cavity, and the spraying device sprays to the top of the stone shrimp culture tank.

[0007] Further, the culture tank further comprises a clamping assembly and a handle, the handle is connected to the outside of the culture tank, and the annular clamping assembly is arranged above the culture tank; the culture cover plate comprises a gauze screen, a support plate and a handle, and the culture cover plate is installed on the culture tank through the clamping assembly; the support plate is a rectangular frame structure; the gauze screen is fixed to the inner side of the support plate, and the handle is fixed to the upper part of the support plate.

[0008] Further, the gauze screen has a mesh size of less than 60 meshes.

[0009] Further, the second water storage tank is provided with a heating device.

[0010] Further, the culture rack is provided with a control box on the side, and the control box is internally provided with a water control valve, a spraying device adjusting valve, an LED lamp switch, a heating pad controller and a water pump switch.

[0011] Further, a plurality of first water filtering pipes are arranged below the inner bottom, the first water filtering pipes are made of PVC material, and the mesh size of the first water filtering pipes is less than 60 meshes; the inner bottom is provided with gravel, silt and a shallow water layer; the slope area and the inner bottom form a slope of 30-45°; a plurality of second water filtering pipes are arranged in the slope area, the second water filtering pipes are made of PVC material, the mesh size of the second water filtering pipes is less than 60 meshes, and the vertical distance from the pipe opening of the second water filtering pipes to the bottom of the shallow water layer is greater than 0.5 cm and less than 2 cm; the shielding area is horizontal to the ground and is provided with an arc-shaped shielding baffle.

[0012] Further, the drain pipe comprises a plurality of first drain pipes, a plurality of second drain pipes, a third drain pipe, a fourth drain pipe and a fifth drain pipe; the first drain pipes are connected to the first water filtering pipes, and the second drain pipes are connected to the second water filtering pipes; the first drain pipes converge into the third drain pipe, the second drain pipes converge into the fourth drain pipe, the third drain pipe and the fourth drain pipe are connected, and the fourth drain pipe and the total drain pipe fifth drain pipe are connected; the third drain pipe and the fourth drain pipe are provided with a water control valve.

[0013] The application further discloses a method for using the circulating water aquaculture system of the Onchidi.

[0014] According to the actual situation of the breeding site, a breeding frame is built, and the Onchidi breeding box is placed in the placing cavity of the breeding frame to ensure that the breeding box is placed stably.

[0015] The devices in the circulating water system are connected, the drain pipe and the spraying device are installed according to the design requirements, and it is ensured that the connections are well sealed and have no water leakage.

[0016] The breeding cover plate is installed and fixed on the breeding tank through the clamping assembly, and it is ensured that the gauze is flat and has no damage.

[0017] The control elements are installed in the control box, the corresponding circuit and control line are connected, the system is debugged, and whether the operation of the devices is normal is checked.

[0018] The gravel, sandy and shallow water layers are laid on the inner bottom of the breeding tank, and the thickness can be adjusted according to the growth needs of the Onchidi.

[0019] The Onchidi is placed in the breeding tank, and an appropriate amount of arc-shaped shielding baffle is placed in the shielding area to provide a hiding place for the Onchidi; and an appropriate amount of water is injected into the breeding tank, and the water level should be higher than the shallow water layer, but the shielding baffle in the shielding area should not be submerged.

[0020] The circulating water aquaculture is carried out.

[0021] Further, the water temperature of the second water storage tank is maintained at 22±2℃.

[0022] Compared with the prior art, the application has the following advantages:

[0023] 1. The breeding tank is divided into a shielding area, a slope area and an inner bottom, and the slope area with a specific inclination and the water filtering pipes at different positions are arranged, and the gravel, sandy and shallow water layers are arranged on the inner bottom, so that the Onchidi is provided with a habitat and growth space simulating a natural environment, which is beneficial to the healthy growth of the Onchidi.

[0024] 2. The circulating water system composed of the first water filtering pipe, the drain pipe, the microfilter, the nitrifying biological reactor, the ultraviolet sterilization device, the water storage tank and the spraying device realizes the recycling and purification treatment of the water for breeding, reduces the waste of water resources, and ensures the stability and cleanliness of the water quality.

[0025] 3. The breeding cover plate adopts the structure of gauze, support plate and handle, and is installed on the breeding tank through the clamping assembly, which is convenient for opening and closing, and is convenient for observing, feeding and managing the Onchidi in the breeding tank, and the gauze aperture is less than 60 meshes, which can effectively prevent the Onchidi from escaping and impurities from entering.

[0026] The special structure of the culture tank provides a suitable growth environment for the stone lobe, promotes its growth and reproduction, the circulating water system ensures the excellent water quality and recycling through the synergistic effect of various treatment devices, and reduces the breeding cost, and the convenient breeding cover plate design improves the convenience of breeding management, and the three cooperate with each other to realize an efficient, stable and environmentally friendly stone lobe circulating water breeding mode.

[0027] To sum up, the stone lobe circulating water breeding system of the present application comprises a breeding tank, a breeding rack, a microfilter, a nitrifying biological reactor, an ultraviolet sterilization device, a spraying device and an LED lamp, which provides a good environment for the growth of stone lobe, has the advantages of controllable breeding environment, high water saving efficiency, controllable breeding environment, simple operation and the like, and solves the problem that stone lobe cannot be artificially bred. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0029] Figure 1 is a side view of the stone lobe circulating water breeding system of the present application;

[0030] Figure 2 is a front view of the stone lobe circulating water breeding system of the present application;

[0031] Figure 3 is a perspective view of the breeding tank in the stone lobe circulating water breeding system of the present application;

[0032] Figure 4 is a perspective view of the drain pipe and heating pad in the stone lobe circulating water breeding system of the present application;

[0033] Figure 5 is a front view of the control box in the stone lobe circulating water breeding system of the present application.

[0034] In the figure: 1, breeding box; 101, inner bottom; 102, slope area; 103, shielding area; 104, No. 1 water filter pipe; 105, clamping assembly; 106, handle; 107, arc-shaped shielding baffle; 108, No. 2 water filter pipe; 12, breeding cover plate; 121, gauze; 122, support plate; 123, handle; 201, drain pipe; 2011, No. 1 drain pipe; 2012, No. 2 drain pipe; 2013, No. 3 drain pipe; 2014, No. 4 drain pipe; 2015, No. 5 drain pipe; 2016, water control valve; 202, drain pipe; 203, drain pipe; 204, drain pipe; 205, lower pressing frame; 206, placing cavity; 207, upper placing frame; 2071, horizontal support; 2072, vertical support; 208, heating pad; 2091, LED lamp; 2081, heating pad controller; 7001, water pump switch; 3, microfilter; 4, nitrifying biological reactor; 5, ultraviolet sterilization device; 6, first water storage tank; 7, water pump; 701, water inlet pipe; 8, second water storage tank; 801, overflow pipe; 9, spraying device; 901, spraying device adjusting valve; 10, control box. DETAILED DESCRIPTION

[0035] 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. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0038] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the following claims, along with full equivalents thereof.

[0039] In the description of the present application, it is to be understood that the orientation terms such as "front", "back", "up", "down", "left", "right", "transverse", "vertical", "horizontal", "top", "bottom", etc. indicate the orientation or positional relationship shown in the drawings, which are merely for the convenience of describing and simplifying the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0040] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", etc. can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0041] In addition, it should be noted that the use of the terms "first", "second", etc. to qualify parts of components is merely for the convenience of distinguishing the corresponding parts of components, and the above terms have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0042] As Figures 1-5As shown, the embodiment of the present application discloses a stonefish circulating water aquaculture system, which comprises a stonefish aquaculture box 1, the stonefish aquaculture box 1 is placed in a placing cavity 206 of an aquaculture frame, the stonefish aquaculture box 1 comprises an aquaculture tank and an aquaculture cover plate 12, the bottom of the aquaculture tank is connected with a first water filtering pipe 104, the first water filtering pipe 104 is connected to the water inlet of a microfilter 3 through a drain pipe 201, the outlet of the microfilter 3 is connected to the water inlet of a nitrifying biological reactor 4 through a drain pipe 202, the water outlet of the nitrifying biological reactor 4 is connected to the water inlet of an ultraviolet sterilization device 5 through a drain pipe 203, the water outlet of the ultraviolet sterilization device 5 is connected to a first water storage tank 6 through a drain pipe 204, the first water storage tank 6 is internally provided with a water pump 7, the water pump 7 is connected to a second water storage tank 8 through a water inlet pipe 701, the top of the second water storage tank 8 is provided with an overflow pipe 801, the bottom of the second water storage tank is connected to a spraying device 9 through a water outlet pipe, the spraying device is installed on the upper side of the placing cavity 206, the spraying device 9 can spray to the top of the stonefish aquaculture box 1, and a control box 10 is installed on the right side of the aquaculture frame 2. The piled-up excrement is cleaned artificially. The present application is convenient to assemble, simple to operate, greatly improves the water body utilization rate, can provide a good growth environment for the stonefish, and realizes the large-scale and high-density artificial breeding of the stonefish. The microfilter 3, the nitrifying biological reactor 4 and the ultraviolet sterilization device 5 are all arranged in corresponding water pools.

[0043] The aquaculture tank comprises an inner bottom 101, a slope area 102, a shielding area 103, a first water filtering pipe 104, a clamping assembly 105, a handle 106, an arc-shaped shielding baffle 107 and a second water filtering pipe 108; the aquaculture cover plate comprises a gauze net 121, a support plate 122 and a handle 123, and the aquaculture cover plate can be fixed on the aquaculture tank through the clamping assembly 105; the support plate 122 is a rectangular frame structure; the gauze net 121 has a pore size less than 60 meshes, is fixed on the inner side of the support plate 122, and the handle 123 is fixed on the upper part of the support plate 122.

[0044] The bottom of the aquaculture frame 2 is fixedly connected with a lower pressing frame 205, and the upper part is connected with an upper placing frame 207; each horizontal row support 2071 of the upper placing frame 207 is from the lower part to the upper part, and comprises a waterproof coating, a support plate, a support frame, a drain pipe 201, a support plate, a heating pad 208 and a waterproof coating in sequence from the lower part to the upper part; the longitudinal row supports 2072 of the upper placing frame 207 are from left to right and comprise a waterproof coating, a support frame, a drain pipe 201, a support frame and a waterproof coating; two horizontal row supports 2071 and three longitudinal row supports 2072 surround a placing cavity 206; an LED lamp 2091 is arranged on the upper middle part of the placing cavity; and the spraying device 9 is arranged on the upper side of the inner side of the placing cavity. The spraying water falls on the shielding baffle and the slope area of the aquaculture tank.

[0045] The second water storage tank 8 is provided with a heating device with a temperature detection assembly, so that the water temperature can be maintained at 22±2℃.

[0046] The control box 10 is internally provided with a water control valve 2016, a spray device regulating valve 901, an LED lamp 2091, a heating pad controller 2081, and a water pump switch 7001.

[0047] A plurality of first water filtering pipes 104 are arranged below the inner bottom 101, the first water filtering pipes 104 are made of PVC, and the mesh aperture of the first water filtering pipes 104 is less than 60 meshes; the stone dog is used to living in a humid environment with mud and sand, and the inner bottom 101 is provided with a gravel, sandy, and shallow water layer; the slope area 102 is inclined to the inner bottom 101 at an angle of 30-45°, and the stone dog mainly breathes air through the lung hole, so the water level cannot be too high. When the water level is higher than the second water filtering pipe, the excess water is automatically discharged; specifically, the slope area 102 is provided with a plurality of second water filtering pipes 108, and when the water level reaches the second water filtering pipe, the water is automatically discharged from the second water filtering pipe; the second water filtering pipe 108 is made of PVC, and the mesh aperture is less than 60 meshes; the vertical distance from the pipe opening of the second water filtering pipe 108 to the bottom of the shallow water layer should be greater than 0.5 cm and less than 2 cm; the shielding area 103 is horizontal to the ground and is provided with an arc-shaped shielding baffle 107 for the stone dog to hide.

[0048] The drain pipe 201 includes a plurality of first drain pipes 2011, a plurality of second drain pipes 2012, a third drain pipe 2013, a fourth drain pipe 2014, and a fifth drain pipe 2015; the first drain pipe 2011 is connected to the first water filtering pipe 104, and the second drain pipe 2012 is connected to the second water filtering pipe 108; the first drain pipe 2011 converges to the third drain pipe 2013, the second drain pipe 2012 converges to the fourth drain pipe 2014, the third drain pipe 2013 and the fourth drain pipe 2014 are connected in communication, the fourth drain pipe and the fifth drain pipe 2015 as the total drain pipe are connected in communication; the third drain pipe 2013 and the fourth drain pipe 2014 are provided with a water control valve 2016.

[0049] The working principle of the circulating water aquaculture system for the stone dog is as follows:

[0050] The sewage of the onchidium sp. breeding box 1 is discharged to the drain pipe 201 through the first water filter pipe 104 and the second water filter pipe 108, and then flows into the micro filter 3 for physical filtration, and then flows into the nitrifying biological reactor 4 and the ultraviolet sterilization device 5 for biological purification and ultraviolet sterilization, and then flows to the first water storage tank 6, and the purified water in the first water storage tank 6 flows into the second water storage tank 8 through the water pump 7, and the water in the second water storage tank flows into the spraying device 9 through the water outlet pipe, and the water flow size is controlled through the spraying device adjusting valve 901 of the spraying device 9, and the water flow flows into the breeding tank through the breeding cover plate 12 at the top of the breeding tank 1, so that the humidity is increased, and the excrement in the slope area 102 and the shelter area 103 can be washed at the same time, and the sewage flows into the first drain pipe through the first water filter pipe 104 at the inner bottom to realize water circulation; in addition, when the water in the breeding tank 11 is too much, the water will automatically flow into the second drain pipe 2012 through the second water filter pipe 108 at the slope area 102 to prevent the onchidium sp. from being submerged.

[0051] The specific use method of the present application comprises the following steps:

[0052] According to the actual situation of the breeding site, a breeding frame is built, and the onchidium sp. breeding box is placed in the placement cavity of the breeding frame to ensure that the breeding box is placed stably.

[0053] Connect each device in the circulating water system, install the drain pipe and the spraying device according to the design requirements, and ensure that each connection is sealed well and there is no water leakage phenomenon.

[0054] Install the breeding cover plate, fix it on the breeding tank through the clamping assembly, and ensure that the gauze is flat and has no damage.

[0055] Install the control elements in the control box, connect the corresponding circuit and control line, debug the system, and check whether the operation of each device is normal.

[0056] Lay gravel, sandy and shallow water layers on the inner bottom of the breeding tank, and the thickness can be adjusted according to the growth needs of the onchidium sp.

[0057] Put the onchidium sp. into the breeding tank, and place an appropriate amount of arc-shaped sheltering baffle in the sheltering area to provide a hiding place for the onchidium sp. ; Inject an appropriate amount of water into the breeding tank, and the water level should be higher than the shallow water layer, but the sheltering baffle in the sheltering area should not be submerged.

[0058] Carry out the circulating water breeding.

[0059] Specifically, the water pump in the circulating water system is opened, the breeding water flows from the water outlet into the micro filter through the first water filter pipe and the drain pipe for preliminary filtration to remove large particles of impurities in the water; then flows into the nitrifying biological reactor for nitrification treatment to decompose harmful substances such as ammonia nitrogen in the water; then flows through the ultraviolet sterilization device for sterilization and disinfection to kill bacteria and viruses in the water; and finally flows into the first water storage tank, and then is pumped into the second water storage tank by the water pump.

[0060] According to the temperature requirement of the breeding water, the heating device in the second water storage tank is turned on to adjust the water temperature to the range suitable for the growth of the stonefish, and the water flow speed and flow rate are controlled through the water control valve to make the water uniformly sprayed on the top of the stonefish breeding tank through the spraying device to form a circulating water flow.

[0061] The spraying amount and spraying time are adjusted regularly through the spraying device adjustment valve in the control box to ensure that the water quality in the breeding tank is fresh and the dissolved oxygen is sufficient.

[0062] The stonefish is fed through the gauze on the breeding cover plate at regular times every day, the feeding amount is adjusted according to the growth stage and number of the stonefish, and the feeding and activity status of the stonefish are observed to timely discover and handle abnormal situations.

[0063] The breeding tank and the circulating water system are regularly cleaned and maintained, whether the filter pipe and the drain pipe are blocked, whether the microfiltration machine, the nitrifying biological reactor and the ultraviolet sterilization device are normally running, and whether the impurities are timely cleaned and the damaged parts are replaced.

[0064] After the above device is built, the actual effect of the stonefish breeding system is verified:

[0065] In the breeding implementation scheme of Pseudolabrus sieboldi:

[0066] Select Pseudolabrus sieboldi with uniform individuals, with a density of 600 per m 2 , respectively, into the experimental device (experimental group) and the breeding tank with sea mud and sand at the bottom and gauze covering at the top (control group), the breeding period is 2 months, during which the salinity is in the range of 32-35 ‰, the dissolved oxygen content is greater than 5 mg / L, the pH is 6.5-7.0, the ammonia nitrogen content is less than 0.8 mg / L, and the nitrite nitrogen content is less than 0.02 mg / L;

[0067] During the breeding, fine cornmeal and spirulina powder soaked in seawater are fed, the ratio of cornmeal and spirulina powder is 4:1, the feeding weight is 5% of the weight of the experimental Pseudolabrus sieboldi, the weight of Pseudolabrus sieboldi is weighed every 15 days to update the feeding amount, the feeding is done once a day, the feeding time is 9:00-10:00, and the residual feed is regularly cleaned, the sand is replaced and the breeding tank is rinsed.

[0068] After two months of breeding, the growth and survival rate of the experimental group and the control group are compared:

[0069] In the breeding implementation scheme of Pseudolabrus sieboldi:

[0070] The average weight of the test group is 3.672±0.92g / individual, and the survival rate is 82.3±1.75%, the average weight of the control group is 3.012±0.76g / individual, and the survival rate is 68.33±2.26 / %.

[0071] The average weight and survival rate of the experimental group of P. lividus were higher than those of the control group.

[0072] Individual purple P. lividus were selected at a density of 200 / m 2 The experimental device (experimental group) and the culture tank with sea mud and sand at the bottom and net cover at the top (control group) were selected, and the culture period was 2 months. During the culture period, the salinity was in the range of 32-35 ‰, the dissolved oxygen content was greater than 5 mg / L, the pH was 6.5-7.0, the ammonia nitrogen content was less than 0.8 mg / L, and the nitrite nitrogen content was less than 0.02 mg / L.

[0073] During the culture period, fine cornmeal and spirulina powder were fed, and the ratio of cornmeal to spirulina powder was 4:1. The feeding weight was 5% of the body weight of the experimental purple P. lividus. The weight of the purple P. lividus was weighed every 15 days to update the feeding amount. The feeding was done once a day, and the feeding time was 9:00-10:00. The residual feed was cleaned regularly, and the mud and sand were replaced and the culture tank was rinsed.

[0074] After two months of culture, the growth and survival rate of the experimental group and the control group were compared.

[0075] The average weight of the experimental group was 16.78±2.34 g / individual, and the survival rate was 95.77±2.75%. The average weight of the control group was 14.37±1.96 g / individual, and the survival rate was 85.43±3.21%.

[0076] The average weight and survival rate of the experimental group of P. lividus were higher than those of the control group.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A recirculating aquaculture system for molluscs of the family Scalyroaceae, characterized in that, The system includes a stone sulphur breeding box, which is placed in the placement cavity of a breeding rack. The stone sulphur breeding box includes a breeding trough and a breeding cover. The breeding trough includes a shielding area, a sloping area, and an inner bottom. The shielding area is at a high position and is equipped with a shielding baffle. The inner bottom is at a low position. The sloping area connects the shielding area and the inner bottom and has a preset inclination. A water outlet is provided on the inner bottom of the breeding trough. The water outlet is connected to a circulating water system. The output end of the circulating water system is sprayed above the stone sulphur breeding box. The inner bottom is composed of a gravel, silt, and shallow water layer; the sloping area is at a 30-45° angle to the inner bottom; multiple No. 2 filter pipes are installed in the sloping area, the No. 2 filter pipes are made of PVC, the mesh size of the No. 2 filter pipes is less than 60 mesh, and the vertical distance from the pipe opening to the bottom of the shallow water layer is greater than 0.5 cm and less than 2 cm; the sheltered area is horizontal to the ground and is equipped with an arc-shaped shelter baffle. The circulating water system includes a No. 1 filter pipe installed at the bottom of the aquaculture tank. The No. 1 filter pipe is connected to the inlet of the microfilter via a drain pipe. The outlet of the microfilter is connected to the inlet of the nitrification bioreactor via a drain pipe. The outlet of the nitrification bioreactor is connected to the inlet of the ultraviolet sterilization device via a drain pipe. The outlet of the ultraviolet sterilization device is connected to a first water storage tank via a drain pipe. The first water storage tank has a built-in water pump. The water pump is connected to a second water storage tank via a water inlet pipe. The top of the second water storage tank has an overflow pipe. The bottom of the second water storage tank is connected to a spray device via an outlet pipe. The spray device is installed on the inner side above the placement chamber and sprays water onto the top of the stone sulphur aquaculture tank. The water temperature in the second water tank is maintained at 22±2℃; The aquaculture trough also includes a snap-fit ​​assembly and a handle. The handle is externally connected to the aquaculture trough, and a ring-shaped snap-fit ​​assembly is provided on the top of the aquaculture trough. The aquaculture cover includes a mesh screen, a support plate, and a handle. The aquaculture cover is installed on the aquaculture trough through the snap-fit ​​assembly. The support plate has a rectangular frame structure. The mesh screen is fixed to the inside of the support plate, and the handle is fixed to the upper part of the support plate. The mesh size is less than 60 mesh; Multiple No. 1 water filter pipes are provided below the inner bottom. The No. 1 water filter pipes are made of PVC and the mesh size of the No. 1 water filter pipes is less than 60 mesh. The drainage pipes include multiple No. 1 drainage pipes, multiple No. 2 drainage pipes, No. 3 drainage pipes, No. 4 drainage pipes, and No. 5 drainage pipes; the No. 1 drainage pipe is connected to the No. 1 filter pipe, and the No. 2 drainage pipe is connected to the No. 2 filter pipe; the No. 1 drainage pipes converge to the No. 3 drainage pipe, the No. 2 drainage pipes converge to the No. 4 drainage pipe, the No. 3 drainage pipe is connected to the No. 4 drainage pipe, and the No. 4 drainage pipe is connected to the main drainage pipe No. 5; a water control valve is installed between the No. 3 drainage pipe and the No. 4 drainage pipe. The specific usage method includes the following steps: Based on the actual conditions of the breeding site, build a breeding rack and place the stone sulphur breeding box in the placement cavity of the breeding rack to ensure that the breeding box is placed stably; Connect all equipment in the circulating water system, install the drain pipes and spray devices according to the design requirements, and ensure that all connections are well sealed and there is no leakage. Install the aquaculture cover plate and fix it to the aquaculture tank using the snap-fit ​​components, ensuring that the mesh is flat and undamaged; Install the control components in the control box, connect the corresponding circuits and control lines, debug the system, and check whether the operation of each device is normal. The bottom of the breeding tank is lined with a layer of gravel, mud and sand and a shallow water layer, and the thickness is adjusted according to the growth requirements of the stone sage. Place the stone slugs in the breeding tank and place an appropriate number of curved shields in the sheltered area to provide hiding places for the stone slugs; pour an appropriate amount of water into the breeding tank, with the water level above the shallow water layer, but do not submerge the shields in the sheltered area. Recirculating aquaculture; Wastewater from the stone succulent aquaculture tank is discharged through filter pipes 1 and 2 to the drain pipe, then flows into a microfiltration machine for physical filtration. Afterward, it flows sequentially into a nitrification bioreactor and an ultraviolet sterilization device for biological purification and sterilization before flowing into the first storage tank. The purified water in the first storage tank is pumped into the second storage tank. Water from the second storage tank flows through an outlet pipe into a spray system. The spray system's regulating valve controls the water flow, which is then evenly distributed into the aquaculture trough through the top cover, increasing humidity and flushing away excrement from the slope and sheltered areas. Wastewater flows through filter pipe 1 at the bottom into the first drain pipe for water circulation. Furthermore, when there is excessive water in the aquaculture trough, it automatically flows through filter pipe 2 in the slope area into the second drain pipe to prevent the stone succulent from being submerged.

2. The recirculating aquaculture system for molluscs of the family Scalyroaceae according to claim 1, characterized in that, The second water storage tank is equipped with a heating device.

3. The recirculating aquaculture system for molluscs of the family Scalyroaceae according to claim 1, characterized in that, A control box is installed on the side of the breeding rack. The control box contains a water control valve, a spray device regulating valve, an LED light switch, a heating pad controller, and a water pump switch.

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