CN118044484A - Shellfish offspring seed circulating water breeding/breeding system - Google Patents

Abstract

The invention discloses a shellfish offspring seed circulating water breeding/culturing system, which comprises an alga continuous culturing system, a culturing pool and a circulating water treatment system, wherein the alga continuous culturing system comprises a photo-bioreactor, a reactor main body supplies alga liquid to the culturing pool through a conduit, and the culturing pool is connected with the circulating water treatment system through a draft tube and a water inlet tube. The shellfish offspring seed circulating water breeding/culturing system can realize continuous culture of baits (microalgae), automatically feeds algae liquid to the culturing pond according to shellfish growth stages and algae cell density of the culturing pond, circulates the culturing water through the circulating water treatment system, realizes industrialized culture of shellfish offspring seeds, reduces culture procedures and reduces manual intervention.

Description

Shellfish offspring seed circulating water breeding/breeding system

Technical Field

The invention relates to a shellfish offspring seed circulating water breeding/culturing system.

Background

The current shellfish seedlings mainly adopt outdoor seedlings and indoor cement ponds for seedlings, the outdoor seedlings are influenced by the changes of the water quality environment, climate and the like of sea areas, the cultivation and production of the fries are unstable, the indoor cement ponds are cultivated by changing water, circulating water is adopted in the fresh fries, and environmental pollution is easily caused by sewage discharge. The Chinese patent publication No. CN112741042B discloses a seawater pond circulating water culture system based on mud flat shellfish, which essentially improves economic benefit by mixedly culturing a plurality of different organisms. Compared with the circulating water culture system, the shellfish breeding system has certain specificity, larvae of shellfish are tiny, generally, running water is adopted, and a common circulating water culture pond cannot be directly used for breeding shellfish offspring. In addition, the demand for bait unicellular algae in the juvenile molluscum period cultivation is greatly increased, the traditional method is to cultivate and supply through a three-level algae system, multiple transfer is needed in the period, the procedure is complex, more manual intervention is needed, pollution is easy to cause, and the cultivation efficiency is low.

Disclosure of Invention

Aiming at the defects, the invention aims to provide a breeding and breeding system for integrated bait breeding and shellfish offspring seed feeding breeding.

The shellfish offspring seed circulating water breeding/culturing system comprises an alga continuous culturing system, a culturing pool and a circulating water treatment system, wherein the alga continuous culturing system comprises a photo-bioreactor, a reactor main body supplies alga liquid to the culturing pool through a conduit, and the culturing pool is connected with the circulating water treatment system through a draft tube and a water inlet tube.

Further, the automatic algae culturing device further comprises a measuring system, the measuring system monitors the algae production stage, the algae cell density and the algae cell density in the culturing pond in the photobioreactor, the reactor main body comprises a liquid outlet, the liquid outlet is connected with a conduit, the conduit is connected with the automatic algae culturing device, and the control module controls the automatic algae culturing device to adjust the algae liquid amount input into the culturing pond according to the monitoring data of the measuring system.

Further, the reactor main body comprises an auxiliary pipeline and a control valve, the auxiliary pipeline is connected with the liquid inlet pipeline in parallel, two ends of the auxiliary pipeline are connected to the liquid inlet pipe, the auxiliary pipeline comprises a backflushing pipe, the diameter of the backflushing pipe is equal to that of the main reactor pipe, the backflushing pipe comprises an inlet, the inlet is suitable for placing a cleaning sponge, the control valve controls the liquid inlet pipe to be closed and the auxiliary pipeline to be opened in such a way that the water inlet drives the cleaning sponge to move in the main reactor pipe.

Further, the algae cultivation system also comprises a seawater electrolysis disinfection system and a growth environment regulating system, wherein the measuring system comprises a chlorophyll fluorescence online measuring device, and the growth environment regulating system comprises a full-automatic temperature control system, a full-automatic O2/CO2 supply system, an illumination intensity control module, a full-automatic nutrient adding system, a gas-liquid circulation system and a PH control module.

Further, the cultivation pond comprises a bottom row device, the bottom row device is connected with the water level retainer through a pipeline, the water level retainer is connected with the draft tube, the bottom row device and the water level retainer are communicated with the water collecting well, and the water collecting well is connected with the main drain pipe.

Further, the cultivation pond comprises a heat exchange coil and an oxygenation facility, the measurement system monitors the density of the microalgae cells in the cultivation pond, and the control module controls the automatic feeding device to feed, so that the cultivation pond keeps the density of the microalgae cells to be 5-8 multiplied by 104 cells/mL.

Further, automatic throw and feed the device and include the shower nozzle, automatic throw and feed the device and include rotating assembly and shower nozzle angle adjustment subassembly, adjust angle adjustment subassembly's angle makes the algae liquid throw and feeds on the surface of water apart from the shower nozzle different distances, and through rotating assembly rotary motion realizes evenly throwing the cultivation pond surface of water with the algae liquid.

Further, the rotary feeding device also comprises a rotary adjusting component, wherein the rotary adjusting component rotates for one circle to form a circular feeding area on the water surface, and the rotary adjusting component is used for adjusting the rotation angular velocity of the rotary component, so that the linear velocities of the circular feeding area are equal when the spray heads are positioned at different angles.

Further, the rotating assembly comprises a rotating table, a transmission device and a servo motor, the servo motor drives the transmission device, the transmission device drives the turntable to rotate, the spray head angle adjusting assembly comprises a first gear, and the spray head is fixed on the first gear and is rotated by the first gear to adjust the elevation angle of the spray head.

Further, still include the second gear, first gear and second gear engagement, the second gear is driven by servo motor, first gear is sector gear, swing joint connecting rod on the first gear, the piston rod of the other end swing joint cylinder of connecting rod, the piston rod is connected with the electronic ruler, and the electronic ruler collects piston rod movement data and feeds back to rotating assembly's servo motor control module, and the servo motor rotational speed of rotating assembly is controlled to control module.

The beneficial technical effects of the invention are as follows:

(1) The invention comprises a seawater electrolysis disinfection device, which can directly disinfect seawater by generating hypochlorite ions through seawater electrolysis, the disinfected seawater is input into a photo-bioreactor to carry out high-density continuous culture on single-cell algae, the stable harvest quantity is maintained through continuous culture, algae liquid is supplied to a culture pond through a guide pipe of a liquid outlet, an electromagnetic valve and a peristaltic pump of the liquid outlet are controlled by a control module, and the input quantity of the algae liquid is adjusted according to the production stage of algae in the photo-reactor, the density of algae cells in the culture pond and the requirements of the growth stage of shellfish.

(2) In the specific embodiment of the invention, the photobioreactor further comprises a growth environment regulating system, the production stage of algae cells, the density of the algae cells and parameters of the culture solution are monitored through an online measuring system, and the control module automatically controls the growth environment regulating system to regulate illumination, temperature, elements and the like of the photobioreactor, so that the high-density stable production of algae is realized, and the high-density continuous stable harvesting of algae is realized.

(3) In a specific embodiment of the invention, an auxiliary tube is also provided, the auxiliary tube comprising a backwash tube, the interior of which is cleaned by being pumped by a water flow and moved along the interior of the photobioreactor by a cleaning sponge inserted into the backwash tube.

(4) In the specific embodiment of the invention, the automatic feeding device is further provided, the nozzle of the automatic feeding device feeds on the water surface through the rotating component, the feeding distance is adjusted by adjusting the elevation angle and the pressure of the nozzle, and the rotating speed of the rotating component is adjusted through the rotating adjusting device, so that algae liquid is uniformly distributed, namely, when the region far away from the nozzle is fed, the rotating angle speed of the rotating component is slower, because the rotating component rotates for the same circle, the circumference formed by the feeding range at a longer distance is longer, and the feeding amount of the nozzle in unit time is constant, so that the rotating speed is reduced to output more algae liquid when the feeding at the longer distance is carried out.

Drawings

FIG. 1 is a schematic view of a feeding house and piping arrangement for implementing the present invention;

FIG. 2 is a schematic top view of a photobioreactor;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a schematic view of the feed tube and auxiliary piping of the photobioreactor;

FIG. 5 is a schematic view of a culture pond;

FIG. 6 is a schematic view of a rotating assembly;

FIG. 7 is a schematic view of a spray head angle adjustment assembly and a rotation adjustment assembly.

Reference numerals illustrate: 1. a cultivation workshop; 2. a cultivation pool; 201. a bottom row device; 3. a circulating water treatment tank; 4. an algae chamber; 5. a photobioreactor; 6. a water inlet pipe; 7. a draft tube; 8. a water collection well; 9. a main drain pipe; 10. a water level holder; 11. a liquid inlet pipe; 12. a control valve; 13. an on-line measuring device; 14. an auxiliary pipe; 15. a backwash tube; 16. an air inlet hole; 17. a liquid outlet; 18. a conduit; 19. a seawater electrolysis disinfection system; 20. a centrifugal pump; 21. an automatic feeding device; 211. a rotating table; 212. a belt drive; 213. a servo motor; 214. a spray head; 215. a first gear; 216. a second gear; 217. a connecting rod; 218. a cylinder; 219. an electronic ruler.

Detailed Description

In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.

Fig. 1 to 4 show a specific embodiment of a shellfish offspring seed circulating water breeding/culturing system according to the present invention, fig. 1 shows a beach shellfish breeding/culturing workshop of the present embodiment, in which an algae continuous culturing system, a culturing tank 2, a measuring system and a circulating water treatment system are provided, the algae continuous culturing system comprises a photo bioreactor 5, a reactor main body supplies algae liquid to the culturing tank 2 through a conduit 18, a manner of continuously culturing unicellular algae and stably supplying algae liquid to the culturing tank 2 every day is adopted, the culturing tank 2 is connected with the circulating water treatment system through a draft tube 7 and a water inlet tube 6, the photo bioreactor 5 is provided with an on-line measuring device 13 and a sampling port for manual sampling for monitoring, the culturing tank 2 is provided with an on-line water quality monitoring instrument and a sampling port for manual sampling for monitoring, algae liquid stable quantity data of the photo bioreactor 5 is calculated according to the algae production stage, algae cell density in the photo bioreactor 5, and algae cell density in the culturing tank 2, and an intelligent control module for controlling the input of algae liquid to the peristaltic pump corresponding to the culturing tank 2 is calculated according to the algae cell density in the culturing tank 2. In the embodiment, a shellfish seedling raising/culturing workshop is provided with 16 sets of photo-bioreactors 5 and tens of culturing ponds 2, the baits of the culturing ponds 2 are provided by algae continuously cultured by the 16 sets of photo-bioreactors 5, the main body of the photo-bioreactors 5 comprises a double-spiral organic glass tube, a PVC gas collecting barrel, a centrifugal pump 20, a fixed support and the like, and the photo-bioreactor further comprises a gas inlet hole 16, a gas permeable valve and a gas permeable hole which are arranged at the upper end of the photo-bioreactors 5, so that gas-liquid circulation is realized. The photobioreactor 5 is provided with a sample outlet and an online measuring device 13, so that sampling monitoring or online monitoring is realized. The photobioreactor 5 is further provided with a liquid outlet 17 and a conduit 18 for supplying algae liquid to the cultivation pond 2. The cultivation pond 2 pipeline layout is built the figure 1 and is shown, and cultivation pond 2 adopts polygonal structure or circular structure, sets up end row device 201 in the cultivation pond 2, and end row device 201 passes through the pipeline and is connected with water level retainer 10, and water level retainer 10 is connected with draft tube 7, end row device 201 and water level retainer 10 and water collecting well 8 intercommunication, and main drain pipe 9 is connected to water collecting well 8, and water level retainer 10 is prior art, mainly includes the overflow aperture on cavity pipe and the cavity pipe, when the water level is higher than the overflow aperture, water flows to draft tube 7 from the overflow aperture, and water collecting well 8 and main drain pipe 9 are mainly used outwards to discharge after cultivation pond hydrologic cycle a certain number of times. The individual shellfish offspring is tiny, and the culture pond 2 is a tiny running water. The water flow of the draft tube 7 flows to the circulating water treatment pool 3, the circulating water treatment system is also in the prior art, the circulating water treatment system comprises solid-liquid separation by a micro-filter, the circulating water treatment system is lifted to an air floatation pool by a submersible pump, then flows to a primary moving bed biological filter and a secondary moving bed biological filter automatically, finally flows back to the cultivation pool 2 by an ultraviolet sterilization device through a water inlet tube 6, wherein the cultivation pool 2 further comprises a water inlet main tube (not shown in the figure) for supplementing water to the cultivation pool 2 from the outside, and the water inlet main tube can be communicated with the water inlet tube 6 for supplying water to the cultivation pool 2.

Referring to fig. 2, 3 and 4, the algae continuous culture system mainly realizes continuous culture of high-density unicellular algae, and maintains a daily stable harvest. Taking the cultivation of dinoflagellate such as globus as an example, preparing a continuous culture medium, continuously monitoring the change of nitrate concentration by a manual sampling or on-line measuring device 13 in the continuous cultivation process, and mainly adopting an ultraviolet spectrophotometry to measure nitrate ions when the concentration is lower than 60umol/L, wherein the nitrate ions have strong absorption in an ultraviolet light region of 220nm, and the relation between the absorbance and the content thereof complies with the lambert-beer law. The intelligent control module controls the full-automatic nutrient adding system to supplement nutrient solution (such as adding corresponding nutrient solution, microelements and the like into the gas collecting barrel or the pipeline of the photobioreactor 5 by adopting an electromagnetic valve and a pump). In the cultivation process of the dinoflagellate such as the globes, air is continuously supplied, the air is mainly pretreated by an air purifier, CO2 is intermittently supplied to a cultivation system, and in the cultivation process, the photoperiod is kept at 12L:12D. The total volume of the dinoflagellates such as the ball is 1600L in the 2000L photobioreactor 5, the dinoflagellates such as the ball is cultivated continuously for 40 days, when the density of the dinoflagellates such as the ball is 640-680 multiplied by 104cell/ml, the stable harvest can be maintained when the daily harvest amount is 200-300L, when the algae cells in the culture solution reach 660 multiplied by 104cell/ml, the daily harvest is 200L, and the daily growth amount is 187 multiplied by 104cell/ml; if 300L is harvested every day, the daily growth amount can reach 159X 104 cells/ml, and higher growth speed can be obtained. When the concentration of the algae is 560 multiplied by 104cell/ml, 400L of the dinoflagellate is discharged every day, and when the concentration of the dinoflagellate such as the dinoflagellate is 480 multiplied by 104cell/ml, 600L of the dinoflagellate is discharged every day, so that the culture of the dinoflagellate such as the dinoflagellate can be in a stable state. Through harvesting tests of different cell densities, it is known that the dinoflagellates such as the globes are harvested in the growth period, and the stable state can be maintained by adding the disinfection seawater and the nutrient solution.

In the above embodiment, referring to fig. 4, the reactor main body further includes an auxiliary pipe 14 and a control valve 12, the auxiliary pipe 14 is connected in parallel with the liquid inlet pipe 11, two ends of the auxiliary pipe 14 are connected to the liquid inlet pipe 11, the auxiliary pipe 14 includes a back flushing pipe 15, an air inlet hole 16 is formed in the auxiliary pipe 14 and is connected to an air and CO2 supply system/device, the diameter of the back flushing pipe 15 is equal to that of the main reactor pipe, the back flushing pipe 15 includes an inlet, a cover body is arranged at the inlet, the inlet is suitable for placing a cleaning sponge, the control valve 12 controls the liquid inlet pipe 11 to be closed, and the control valve 12 of the auxiliary pipe 14 is opened so that the cleaning sponge is driven by the water inlet of the auxiliary pipe 14 to be flushed into the main reactor pipe from the back flushing pipe 15 and moved in the main reactor pipe for cleaning.

In the above embodiment, the algae cultivation system further includes the seawater electrolysis disinfection system 19 and the growth environment adjustment system including the full-automatic temperature control system, the full-automatic O2/CO2 supply system, the illumination intensity control module, the full-automatic nutrient addition system, the gas-liquid circulation system, and the PH control module. In the embodiment, 2 sets of intelligent seawater electrolytic disinfection systems 19 are constructed in a shellfish offspring breeding workshop, and an experiment of the influence of electrolytic oxidation (Electrochemically oxidized water) technology on the growth and propagation of dinoflagellates such as dinoflagellates (Isochrysis galbana Parke) 8701, dinoflagellates (TETRASELMIS HELGOLANDICA) and Chaetoceros muelleri (Chaetoceros muelleri) for cultivating the dinoflagellates is carried out. The experiment sets 2 experimental groups of electrolytic oxide sand filtration seawater EOW100 (ACC 100 mg/L) and bleaching powder disinfection sand filtration seawater (ACC 35 mg/L), and the boiling sand filtration seawater is used as a control group to carry out single culture on dinoflagellate 8701, phaliota macroalgae and Chaetoceros muelleri such as globus and the like for 10 days. The results show that the cell density and Optical Density (OD) values of 3 microalgae are well-linear at 680nm wavelength. The electrolytic oxidation technology is suitable for the growth of 3 marine microalgae, and the electrolytic oxidation seawater group (ACC 100 mg/L) of the dinoflagellate 8701 such as a culture ball is cultured to obtain the highest cell density of 43.77 X105 cells/mL in the 10 th day, and is obviously higher than that of a control group (P > 0.05); the final algae cell density between the treatment groups of the cultured Phaeophyllum qinghaosu and Chaetoceros muelleri is not significantly different (P > 0.05); in conclusion, the electrolytic oxidation seawater (ACC 100 mg/L) is suitable for culturing high-quality shellfish bait microalgae such as dinoflagellates 8701 such as globes, dinoflagellates such as Chaetoceros tsutsugammadaiensis and Chaetoceros muelleri.

A TEC temperature control device is arranged below the bottom cover of the reactor, collected parameters are sent to a controller through a temperature sensor at the upper end of the reactor, and the controller controls the TEC to heat or cool, so that the temperature of the reactor is adjusted.

The light source of the reactor illumination system is an LED integrated light source arranged outside the reactor. The LED light bars are arranged in a spiral array outside the photo bioreactor 5. The external LED can avoid the influence of low light energy utilization rate of algae cells in the reactor caused by the adhesion of algae on the wall of the lamp tube due to the adherent growth. The LED light bar is mainly formed by combining LEDs of a white light source, and the power supply voltage of the light bar is 24V. The LED light bar is driven by a driving circuit, receives PWM (pulse width modulation) with different duty ratios output by the singlechip, and realizes different light-dark ratios and different illumination intensities so as to meet the requirement of light intensity in the algae cultivation process. The illuminance sensor mainly uses a hot spot effect to perform illuminance detection.

The pH control system consists of a pH instrument, a pH electrode and an acid-base liquid peristaltic pump. The pH electrode can accurately measure the pH value of the algae liquid in real time. The instrument displays the pH value of the algae liquid in real time and can set the expected pH value, when the pH value of the nutrient liquid is higher than a set value, the acid-base peristaltic pump is started and the citric acid reagent is introduced dropwise so as to reduce the pH value of the algae liquid; otherwise, when the initial pH value of the nutrient solution is lower than a set value, the acid-base peristaltic pump is started and the sodium hydroxide reagent is added dropwise to raise the pH value of the nutrient solution until the pH value is stable.

The measurement system of the photobioreactor 5 comprises a photosynthetic activity meter, when living planktonic algae are irradiated by light, chlorophyll, a photophobic color complex (LHC) and an antenna system (ANTENNAE SVSTEN) within the algae cells are excited by absorbed photon energy, which is mainly consumed by three pathways: (1) Is transformed into chemical energy to be stored under photosynthesis by algae cells; (2) The remaining energy dissipated outwards as heat (3) is dissipated outwards as fluorescence. The total amount of energy consumed by the three pathways is the same, and each form of energy change causes two other energy changes, namely photochemical reactions (photochemical quenching) and heat dissipation (HEAT DISSIPATE), to cause Fluorescence quenching, thereby changing the value of chlorophyll Fluorescence (Fluorescence). Compared with the other two energies, the chlorophyll fluorescence measurement method is simpler. The ratio information of photochemical reaction and heat dissipation can be obtained through the chlorophyll fluorescence quantum yield, so that the chlorophyll fluorescence probe can well reflect the growth state information of algae.

In the above embodiment, the cultivation pond 2 includes a heat exchange coil and an oxygenation device (not shown in the figure), the constant temperature and oxygenation device of the cultivation pond 2 are all in the prior art, the measurement system includes an on-line monitoring device and a sampling port which is arranged for manual sampling monitoring, the on-line monitoring device includes on-line monitoring of water quality physicochemical factors, the adopted on-line monitoring means is mainly fixed-point water quality monitoring, the carried on-line monitoring device is equipped with YSI corporation EXO2 and YSI 6600V2 multi-parameter instruments, the monitoring elements include water temperature, conductivity, dissolved oxygen, pH, turbidity, chlorophyll a and the like, and other parameters such as nutritive salts adopt manual monitoring. The change of algae cell density in the seedling raising pond is monitored by a spectrophotometry, the growth stage and the algae cell density of target algae in the photobioreactor 5 are judged, the growth period and the number of shellfish seedlings coated by the shellfish seed breeding pond center bank are judged, the input quantity of algae liquid is timely adjusted according to the requirements of the shellfish seedlings, algae is accurately fed to each seedling raising pond every 4-8 h, and the microalgae cell density is kept to be 5-8 multiplied by 104 cells/mL so as to meet the nutritional ingredients required by shellfish growth.

Since the individual shellfish offspring seeds in the cultivating pool 2 are tiny (the size is similar to dust), the activity capability of the individual shellfish offspring seeds in the cultivating pool 2 is limited, the cultivating pool 2 adopts micro-flowing water, algae liquid is difficult to be evenly distributed through the water flow of the cultivating water, and the cultivating pool 2 needs to be evenly fed. Referring to fig. 5, 6 and 7, in the present embodiment, the automatic feeding device 21 includes a nozzle 214, the nozzle 214 is connected with the catheter 18, the automatic feeding device 21 further includes a rotating assembly and a nozzle angle adjusting assembly, the rotating assembly includes a rotating table 211, a transmission device and a servo motor 213, the transmission device may be a belt transmission device 212, a gear transmission device or the like, the servo motor 213 drives the transmission device, the transmission device drives the rotating table 211 to rotate, and the rotating table 211 drives the nozzle 214 to rotate; the angle adjusting assembly of the spray head 214 comprises a first gear 215, the spray head 214 is fixed on the first gear 215, the elevation angle of the spray head 214 is adjusted by the rotation of the first gear 215, the angle adjusting assembly also comprises a second gear 216, the first gear 215 is meshed with the second gear 216, the second gear 216 is driven by a servo motor, and the first gear 215 is a sector gear. Under the conditions that the pumping pressure is unchanged and the elevation angle of the spray head 214 is unchanged, the rotating table 211 rotates one circle to drive the spray head 214 to form a circular feeding range towards the water surface with a preset distance, the rotating angular speed determines how much algae liquid is fed (the slower the rotating speed is, the more algae liquid is fed), the elevation angle of the spray head 214 is adjusted after the spray head 214 rotates one circle or a plurality of circles, the feeding distance is changed, a new circular feeding range is formed after the spray head 214 rotates one circle or a plurality of circles, and the algae liquid is more uniformly distributed on the water surface of the cultivation pool 2 through the rotation of the spray head 214 and the change of the elevation angle. The problem is that when the elevation angle of the spray head 214 is different, the diameter of the circular feeding range is different, the circumference thereof is different, and when the rotating assembly rotates at a constant angular velocity, the time of one revolution is fixed, that is, the amount of bait fed is also fixed, and the feeding range formed is different, the larger the diameter is, the larger the feeding range is, so that the distribution of the bait on the water surface is uneven. The embodiment sets up rotation regulation subassembly, swing joint connecting rod 217 on the first gear 215, the piston rod of low friction cylinder 218 of the other end swing joint of connecting rod 217, the piston rod is connected with electronic scale 219, when shower nozzle 214 angle produces the change, can produce a movement data on the piston rod, through the correspondence of movement data and angle, can and angle and the correspondence of delivery distance, electronic 219 chi gathers piston rod movement data and feeds back to control module, control module adjusts rotation speed of servo motor 213 of rotation subassembly, make shower nozzle 214 have equal linear velocity at the ring of the range of throwing that the algae liquid formed under different elevation angles, make algae liquid evenly distributed on the surface of water.

The present invention is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present invention.

Claims (10)

1. A shellfish offspring seed circulating water breeding/culturing system, which is characterized in that: the continuous algae cultivation system comprises a photobioreactor, wherein a reactor main body supplies algae liquid to the cultivation pool through a guide pipe, and the cultivation pool is connected with the circulating water treatment system through a draft tube and a water inlet tube.

2. A shellfish offspring seed circulating water reproduction/cultivation system according to claim 1, wherein: the automatic algae feeding device comprises a reactor body and is characterized by further comprising a measuring system, wherein the measuring system monitors the algae production stage, the algae cell density in the photobioreactor and the algae cell density in the cultivation pond, the reactor body comprises a liquid outlet, the liquid outlet is connected with a conduit, the conduit is connected with the automatic algae feeding device, and a control module controls the automatic algae feeding device to adjust the algae liquid amount input into the cultivation pond according to monitoring data of the measuring system.

3. A shellfish offspring seed circulating water reproduction/cultivation system according to claim 1, wherein: the reactor main body comprises an auxiliary pipeline and a control valve, the auxiliary pipeline is connected with the liquid inlet pipeline in parallel, two ends of the auxiliary pipeline are connected to the liquid inlet pipeline, the auxiliary pipeline comprises a back flushing pipe, the diameter of the back flushing pipe is equal to that of the main reactor pipe, the back flushing pipe comprises an inlet, the inlet is suitable for placing cleaning sponge, the control valve controls the liquid inlet pipe to be closed and the auxiliary pipeline to be opened, so that water is fed to drive the cleaning sponge to move in the main reactor pipe.

4. A shellfish offspring seed circulating water reproduction/cultivation system according to claim 1, wherein: the algae cultivation system further comprises a seawater electrolysis disinfection system and a growth environment adjusting system, the measuring system comprises a chlorophyll fluorescence online measuring device, and the growth environment adjusting system comprises a full-automatic temperature control system, a full-automatic O2/CO2 supply system, an illumination intensity control module, a full-automatic nutrient adding system, a gas-liquid circulation system and a PH control module.

5. A shellfish offspring seed circulating water reproduction/cultivation system according to claim 1, wherein: the cultivation pond comprises a bottom row device, the bottom row device is connected with a water level retainer through a pipeline, the water level retainer is connected with a draft tube, the bottom row device and the water level retainer are communicated with a water collecting well, and the water collecting well is connected with a main drain pipe.

6. A shellfish offspring seed circulating water reproduction/cultivation system according to claim 2, wherein: the cultivation pond comprises a heat exchange coil and an oxygenation facility, the measurement system monitors the density of the microalgae cells in the cultivation pond, and the control module controls the automatic feeding device to feed, so that the cultivation pond keeps the density of the microalgae cells to be 5-8 multiplied by 10 ⁴ cells/mL.

7. The shellfish offspring seed circulating water reproduction/cultivation system according to claim 6, wherein: the automatic feeding device comprises a spray head, the automatic feeding device comprises a rotating assembly and a spray head angle adjusting assembly, the angle of the angle adjusting assembly is adjusted to enable algae liquid to be fed onto water surfaces at different distances from the spray head, and the algae liquid is evenly fed onto the water surfaces of the cultivation pool through the rotating motion of the rotating assembly.

8. The shellfish offspring seed circulating water reproduction/cultivation system according to claim 7, wherein: the rotary feeding device comprises a spray head, a rotary adjusting component and a rotary adjusting component, wherein the rotary adjusting component rotates for one circle to form a circular feeding area on the water surface, and the rotary adjusting component is used for adjusting the rotation angular speed of the rotary component, so that the linear speeds of the circular feeding area are equal when the spray head is at different angles.

9. The shellfish offspring seed circulating water reproduction/cultivation system of claim 8 wherein: the rotating assembly comprises a rotating table, a transmission device and a servo motor, the servo motor drives the transmission device, the transmission device drives the turntable to rotate, the spray head angle adjusting assembly comprises a first gear, and the spray head is fixed on the first gear and is rotated by the first gear to adjust the elevation angle of the spray head.

10. The shellfish offspring seed circulating water reproduction/cultivation system of claim 8 wherein: the automatic rotary device comprises a rotary component, and is characterized by further comprising a first gear, a first gear and a second gear which are meshed, wherein the first gear is driven by a servo motor, the first gear is a sector gear, a connecting rod is movably connected to the first gear, the other end of the connecting rod is movably connected with a piston rod of a cylinder, the piston rod is connected with an electronic ruler, the electronic ruler collects piston rod movement data and feeds back the piston rod movement data to the servo motor control module of the rotary component, and the control module controls the servo motor rotating speed of the rotary component.