A Daphnia collection device based on indoor cultivation of microalgae

Abstract

The present invention provides a Daphnia collection device based on indoor cultivation with microalgae, comprising an insect collecting device, a water inlet and a water inlet valve arranged at the water inlet of the insect collecting device, an insect attracting lamp and an insect collecting port arranged on the side wall of the insect collecting device, an insect collecting valve installed on the pipeline of the insect collecting port, a filtering device for separating living Daphnia from stones, microalgae residues, insect shells, excrement and suspended residue particles is arranged inside the insect collecting device, a water outlet is arranged at the bottom of the insect collecting device, and a water outlet valve is installed on the pipeline of the water outlet; the insect collecting device is supported and fixed by a supporting foot. The device does not hurt Daphnia, has high safety, can quickly separate Daphnia from inactive residues, removes residues, has a high removal rate and good effect.

Description

Technical Field

[0001] The present invention relates to the technical field of Daphnia collection, and more particularly to a Daphnia collection device based on indoor cultivation of microalgae. Background Art

[0002] In natural water bodies, after hatching from fertilized eggs, fish fry mainly feed on zooplankton, and also eat phytoplankton (such as algae), especially rotifers and some small species of cladocerans. As a high-quality bait for fish fry, zooplankton has an absolute advantage that cannot be replaced by artificial feed.

[0003] Daphnia sinensis is one of the most important zooplankton species in the Yellow Sea and the East China Sea. Its population is distributed over a wide range, from the inland sea of ​​Japan to the coastal waters of Vietnam. When its number is at its highest, it can account for more than 80% of the total zooplankton biomass. Its eggs and nauplii are the main food for species at the first trophic level in the food chain.

[0004] In nature, copepods mainly feed on phytoplankton, especially diatoms. In addition, copepods also eat dinoflagellates, protozoa, detritus, and eggs and larvae of other zooplankton. Food is crucial to the reproduction of copepods. In the absence of food, the spawning behavior of copepods will stagnate. Microalgae can make the gonads of Daphnia cerevisiae mature.

[0005] However, in the process of indoor Daphnia cultivation, due to the use of microalgae such as diatoms and the lack of effective collection devices, residues continue to accumulate in the water. At the same time, the corpses of Daphnia, metabolites and other substances are continuously released, causing serious deterioration of water quality and making it impossible to effectively and quickly separate living Daphnia from other substances. Summary of the invention

[0006] The present invention provides a Daphnia collection device based on indoor cultivation of microalgae, which can quickly and effectively separate living Daphnia bait from suspended residue particles, prevent water quality deterioration, and achieve efficient and thorough separation of living Daphnia from other substances.

[0007] The invention provides a Daphnia collection device based on indoor cultivation using microalgae, comprising an insect collecting device, a water inlet arranged at the water inlet of the insect collecting device, and a water inlet valve installed on a water inlet pipe of the water inlet; the side wall of the insect collecting device is provided with an insect attracting lamp and an insect collecting port, the insect collecting valve is installed on the pipe of the insect collecting port, a filtering device for separating living Daphnia from stones, microalgae residues, insect shells, excrement and suspended residue particles is provided inside the insect collecting device, a water outlet is provided at the bottom of the insect collecting device, and the water outlet valve is installed on the pipe of the water outlet; the insect collecting device is supported and fixed by a supporting foot.

[0008] Preferably, the filtering device includes filter cotton, an anion resin adsorption layer, honeycomb activated carbon, a cationic resin adsorption layer and a filtering and collecting device arranged from top to bottom, the filter cotton is used to separate Daphnia from particulate residues, the anion resin adsorption layer and the cationic resin adsorption layer are used to adsorb and separate charged residues, the honeycomb activated carbon is used to adsorb suspended particulate matter of a preset size, and the filtering and collecting device collects filtered and dropped substances.

[0009] Preferably, the water inlet valve, the insect collecting valve and the water outlet valve are all solenoid valves, and each solenoid valve is communicatively connected with the PLC.

[0010] Preferably, a liquid level detector is provided on the inner wall of the insect collecting device, and the liquid level detector is communicatively connected with the PLC.

[0011] Preferably, the water outlet can be switchably connected to an external water pipe so as to reversely clean the filter device.

[0012] Preferably, the filtering device further comprises a peripheral fixing net, and the filter cotton, the anion resin adsorption layer, the honeycomb activated carbon and the cationic resin adsorption layer are detachably mounted on the side wall of the insect collecting device via the peripheral fixing net.

[0013] The Daphnia collection device provided by the present invention is based on indoor cultivation of microalgae. The Daphnia in the insect collection device is lured to the upper and middle layers of the water surface by an insect attracting lamp. The continuously introduced new seawater continuously presses down the residual matter, which moves to the bottom with the water flow. The living Daphnia is separated from other substances by a filtering device, and then large-particle residual matter, suspended particulate matter, charged residual matter and other non-absorbable substances are adsorbed and filtered. The insect collection port is opened to discharge the Daphnia. Since the residual matter is tightly adsorbed on the bottom filtering device, it will not be discharged with the insects, thereby achieving the purpose of collecting insects. The filtered water is discharged through the water outlet. The device does not hurt Daphnia, has high safety, can quickly separate Daphnia from inactive residual matter, remove residual matter, has a high removal rate and good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of a Daphnia collection device based on indoor cultivation of microalgae provided by the present invention.

[0016] Among them, 1-insect collecting device, 2-water inlet, 3-water inlet valve, 4-insect attracting lamp, 5-insect collecting port, 6-insect collecting valve, 7-filter cotton, 8-anion resin adsorption layer, 9-honeycomb activated carbon, 10-cationic resin adsorption layer, 11-filtration and collecting device, 12-water outlet, 13-water outlet valve, 14-support foot. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] The present invention provides a Daphnia collection device based on indoor cultivation of microalgae, comprising an insect collecting device 1, a water inlet 2, a water inlet valve 3, an insect attracting lamp 4, an insect collecting port 5, an insect collecting valve 6, a filtering device, a water outlet 12, a water outlet valve 13 and a supporting foot 14.

[0020] The insect collecting device 1 is made of a completely opaque acrylic material. The insect collecting device 1 is preferably a cylindrical or square column structure. The insect collecting device 1 is used to hold a culture solution containing Daphnia. A water inlet 2 is provided at the upper end of the top water inlet of the insect collecting device 1. A water inlet valve 3 is installed in the water inlet pipe of the water inlet 2. An insect attracting lamp 4 and an insect collecting port 5 are provided on the side wall of the insect collecting device 1. An insect collecting valve 6 is installed on the pipe of the insect collecting port 5. A water outlet 12 is provided at the bottom of the insect collecting device 1, and a water outlet valve 13 is installed on the pipe of the water outlet 12.

[0021] In addition, the water inlet 2 is installed at the top water inlet of the insect collecting device 1, and the water flows into the collecting device through the water inlet 2. The liquid flow rate is adjusted by adjusting the opening of the water inlet valve 3 to control the flow rate at 50-100L / min.

[0022] The insect attractant lamp 4 is preferably a yellow spotlight insect attractant lamp. Furthermore, the insect attractant lamp has a light intensity of 1000-3000 lux, a wavelength of 450-600nm, and has certain waterproof and anti-corrosion properties.

[0023] The insect collecting device 1 is provided with a filter device inside, which is used to separate live Daphnia from stones, microalgae residues, insect shells, excrement and suspended residue particles. The live Daphnia are isolated by the filter device, and the stones, microalgae residues, insect shells, excrement and suspended residue particles are adsorbed by the filter device. The live Daphnia are discharged from the outside of the collection device through the insect collecting port 5. The bottom of the insect collecting device 1 is provided with a water outlet 12, and the filtered liquid is discharged through the water outlet 12. The flow rate of the water outlet 12 can be adjusted by the water outlet valve 13 on the water outlet 12. The insect collecting device 1 is supported and fixed by a support foot 14.

[0024] When the water level approaches 70% of the collecting device, the bottom water outlet valve 13 is opened to allow the aquaculture water to flow out slowly, and the water outlet valve 13 and the inlet valve are adjusted to maintain the water level at 70-80% of the height of the insect collecting device 1; after all the culture solution has flowed in, the water inlet valve 3 is switched to the fresh seawater pipeline, and fresh seawater is flowed in to wash the insect solution, and the residual matter collected at the bottom is washed out; after cleaning for 30-60 minutes, the water inlet valve 3, the water outlet valve 13, and the insect attractant lamp 4 are closed in sequence, and then the insect collecting valve 6 is opened to discharge the collected insects into a 100-150 mesh insect collecting bag for collection.

[0025] In a specific embodiment, the filtering device includes filter cotton 7, an anion resin adsorption layer 8, honeycomb activated carbon 9, a cationic resin adsorption layer 10 and a filtering collection device 11.

[0026] The living water fleas are filtered through the filter cotton 7, and the large particle residues and suspended particles are adsorbed by the honeycomb activated carbon 9 (preferably with a pore size of 10 to 50 mm), and the charged residues are adsorbed and separated by the anion resin adsorption layer 8 and the cationic resin adsorption layer 9. Finally, other substances that cannot be adsorbed fall into the filter collection device 11. The filter collection device 11 is an inverted cone open structure, which is fixed above the water outlet 12 by a bracket. The filtered water is discharged from the water outlet 12 along the water flow. After all the residues are adsorbed on the bottom layer, the insect discharge port in the middle of the collection device is opened to discharge the water fleas. Because the residues are tightly adsorbed on the bottom layer, they will not be discharged with the insects, thereby achieving the purpose of collecting insects.

[0027] In addition, the filtering device also includes an outer fixed net, and the filter cotton 7, anion resin adsorption layer 8, honeycomb activated carbon 9 and cationic resin adsorption layer 10 are detachably mounted on the side wall of the insect collecting device 1 through the outer fixed net to facilitate disassembly, taking and replacement, and more convenient use.

[0028] On the basis of the above embodiments, automatic control of water quality filtration and water flea collection can be achieved. Specifically, the water inlet valve 3, insect collection valve 6, and water outlet valve 13 are all solenoid valves, and each solenoid valve is connected to the PLC communication. The PLC controls the start and stop and opening of the valve according to its internal preset program, thereby realizing automatic control of the liquid inlet, liquid discharge, and insect discharge processes, which is more accurate and efficient, saving manpower and material resources.

[0029] Furthermore, a liquid level detector can be provided on the inner wall of the insect collecting device 1. The liquid level detector is connected to the PLC for communication. The liquid level detector detects the liquid level in the insect collecting device 1 in real time and transmits the liquid level information to the PLC. The PLC controls the liquid inlet and outlet processes according to an internal preset program to maintain the water level at a safe height.

[0030] The water outlet 12 can be switched to an external water pipe. After the collection of Daphnia is completed, the water outlet 12 is connected to the tap water hose, water is fed in the reverse direction, the insect collecting valve 6 is opened, the filter device is continuously flushed, and the impurities adsorbed in the filter device are discharged through the insect collecting port 5 using clean water.

[0031] A large number of tests have shown that the parameters of the cleaning time, residual material removal rate, Daphnia collection rate and Daphnia activity of the Daphnia collection device provided by this solution are as follows:

[0032]

[0033] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0034] The above is a detailed introduction to the Daphnia collection device based on indoor cultivation of microalgae provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A Daphnia collection device based on indoor cultivation of microalgae, characterized in that: The invention comprises an insect collecting device (1), a water inlet (2) arranged at the water inlet of the insect collecting device (1), and a water inlet valve (3) installed on the water inlet pipe of the water inlet (2); the side wall of the insect collecting device (1) is provided with an insect attracting lamp (4) and an insect collecting port (5); the pipe of the insect collecting port (5) is provided with an insect collecting valve (6); the inside of the insect collecting device (1) is provided with a filtering device for separating living water fleas from stones, microalgae residues, insect shells, excrement and suspended residual particles; the bottom of the insect collecting device (1) is provided with a water outlet (12); the pipe of the water outlet (12) is provided with a water outlet valve (13); the insect collecting device (1) is supported and fixed by a supporting foot (14); The filtering device comprises a filter cotton (7), an anion resin adsorption layer (8), a honeycomb activated carbon (9), a cationic resin adsorption layer (10) and a filtering and collecting device (11) arranged from top to bottom, wherein the filter cotton (7) is used to separate Daphnia from particulate residues, the anion resin adsorption layer (8) and the cationic resin adsorption layer (10) are used to adsorb and separate charged residues, the honeycomb activated carbon (9) is used to adsorb suspended particulate matter of a preset size, and the filtering and collecting device (11) collects filtered and dropped substances; the honeycomb activated carbon (9) has a pore size of 10-50 mm; the filtering and collecting device (11) is an inverted cone-shaped open structure, and the filtering and collecting device (11) is fixed above the water outlet (12) by a bracket; The water inlet valve (3), the insect collecting valve (6), and the water outlet valve (13) are all solenoid valves, and each solenoid valve is connected to the PLC for communication; The inner wall of the insect collecting device (1) is provided with a liquid level detector, and the liquid level detector is connected to the PLC for communication; The water outlet (12) is used to switchably connect to an external water pipe so as to reversely clean the filter device; The filtering device further comprises a peripheral fixing net, and the filter cotton (7), the anion resin adsorption layer (8), the honeycomb activated carbon (9) and the cationic resin adsorption layer (10) are detachably mounted on the side wall of the insect collecting device (1) via the peripheral fixing net; The insect attracting lamp (4) is a yellow spotlight insect attracting lamp with an insect attracting light intensity of 1000-3000 lux and a wavelength of 450-600 nm.

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