CN114163068B

CN114163068B - Control system for external carbon source in recirculating aquaculture

Info

Publication number: CN114163068B
Application number: CN202111326018.7A
Authority: CN
Inventors: 章霞; 徐志进; 李伟业; 殷小龙; 马雪彬; 王易帆; 陈爽
Original assignee: ZHEJIANG PROVINCE ZHOUSHAN CITY AQUATIC PRODUCTS INSTITUTE
Current assignee: ZHEJIANG PROVINCE ZHOUSHAN CITY AQUATIC PRODUCTS INSTITUTE
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2023-04-07
Anticipated expiration: 2041-11-10
Also published as: CN114163068A

Abstract

The invention discloses an externally-added carbon source control system in circulating water culture, which comprises a circulating water filter material pool, a micro-filter, a protein separator and a circulating water culture pool which are sequentially connected; the circulating water filter material pool is connected with a carbon source adding device; the carbon source adding device comprises a storage box, a transfer box and a Z-shaped connecting channel which are connected in sequence, and an electromagnetic valve is arranged at the joint of the storage box and the transfer box; the outlet end of the Z-shaped connecting channel is connected with the circulating water filter material pool; the carbon source adding device is connected with the circulating water culture pond through a peristaltic pump; a weighing platform is arranged in the Z-shaped connecting channel, the weighing platform is positioned below the transfer box and connected with the central control module, and the peristaltic pump is positioned at the upstream of the weighing platform; the operation of the electromagnetic valve and the peristaltic pump is controlled by the central control module. The method can automatically add the additional carbon source in the culture process, has accurate addition amount and high controllability, and can effectively prolong the interval time of water change of the culture water body.

Description

Control system for external carbon source in recirculating aquaculture

Technical Field

The invention belongs to the technical field of aquaculture water treatment, and particularly relates to an external carbon source control system in recirculating aquaculture.

Background

The overall yield and the degree of intensification of aquaculture are increasing day by day, and the problem of pollution of aquaculture water is the focus of research. At present, although the water treatment technology in the industrial recirculating aquaculture is increasingly perfect, the water treatment technology still has a plurality of problems. In the aquaculture production, the high protein bait is widely applied, the high nutrient substances contained in the high protein bait enable aquatic fishes, shrimps and the like to grow to market specifications in a short time, but the nitrogen element which is really utilized in the high protein bait is very limited.

In the aquaculture process, indexes in the water environment are changed due to the amount of biomass, different culture stages and different culture varieties, the carbon-nitrogen ratio is changed, and a large amount of nitrogen is deposited in bottom mud to cause the blackening of the bottom materials or is discharged to the external environment, so that the eutrophication and pollution of the water quality are caused. By adding the carbon source into the bait, on one hand, the production of microorganisms such as bacteria and the like can be promoted, and on the other hand, the requirement on the content of bait protein in aquaculture can be reduced by forming organic floccules.

The invention patent application with application publication number CN 108467112A discloses a solid carbon source adding control system and application thereof in aquatic animal organism floccule culture, the system comprises: a fish tank; setting the air stone in the fish tank; the water circulation device is communicated with the fish tank and comprises a peristaltic pump, a filler container and filler arranged in the filler container, and a water inlet of the peristaltic pump is connected with a water outlet of the fish tank; the detection unit is connected with the fish tank; and the control unit is connected with the detection unit and the peristaltic pump. The system has a flexible carbon source adding function, and can ensure the safety value of dissolved oxygen in BFT (Biofloc technology). In addition, the system solves the problem of nitrate accumulation in BFT by denitrification. The application of a solid carbon source adding control system in aquatic animal organism floccule culture is adopted. The way in which the carbon source is added is controlled.

Disclosure of Invention

The invention aims to provide the externally-added carbon source control system in the recirculating aquaculture, which has high automation level, adjustable feeding amount and good mixing degree, and can prolong the interval time of water change of aquaculture water bodies.

The technical scheme adopted by the invention for realizing the purpose is as follows:

an external carbon source control system in circulating water culture comprises a carbon source adding device, a circulating water filter material pool, a micro-filter, a protein separator and a circulating water culture pool which are sequentially connected; a connecting pipeline is arranged between the circulating water filter material pool and the circulating water culture pool; a water quality monitoring device is arranged between the protein separator and the circulating water culture pond; the circulating water filter material pool is connected with a carbon source adding device; the water quality monitoring device and the carbon source adding device are both connected with the central control module, and the central control module can control the operation of the carbon source adding device according to information fed back by the water quality detecting device;

the carbon source adding device comprises a storage box, a transfer box and a Z-shaped connecting channel which are connected in sequence, and an electromagnetic valve is arranged at the joint of the storage box and the transfer box; the outlet end of the Z-shaped connecting channel is communicated with the circulating water filter material pool; the carbon source adding device is communicated with the circulating water culture pond through a peristaltic pump;

a weighing platform is arranged in the Z-shaped connecting channel, is positioned at the bottom of the bending part of the Z-shaped connecting channel, is positioned below the transfer box in the vertical direction, is connected with the central control module, and is positioned at the upstream of the weighing platform; the operation of the electromagnetic valve and the peristaltic pump is controlled by the central control module.

By adopting the technical scheme, aquatic animals are raised in the circulating water culture pond, the water quality of the culture water body is monitored in real time, the addition amount of the carbon source is automatically adjusted through the central control module, the health of the culture environment is ensured, and the water changing interval is prolonged. In the culture process, extra carbon source substances can be added into the circulating water culture pond through the circulating water filter material pond according to culture needs, and the carbon-nitrogen ratio in the water body in the circulating water culture pond is adjusted. After the external carbon source is added, residual bait, excrement, organic debris and the like in the culture environment can be converted into nutrient substances which can be utilized by omnivorous organisms, so that the production of aquatic animals is promoted, and the substance utilization efficiency of the bait is improved.

Specifically, the water quality condition of the aquaculture water body is monitored at any time through the water quality monitoring device, and a monitoring result is fed back to the central control module. The central control module analyzes and judges the optimal range of the carbon-nitrogen ratio in the recirculating aquaculture pond according to the amount of biomass in the recirculating aquaculture pond, the difference of the aquaculture stages and the difference of aquaculture varieties, calculates the amount of the carbon source to be added by combining the information fed back by the water quality monitoring device, and controls the carbon source adding device to quantitatively add the carbon source.

The junction of storage case and transfer box disposes the solenoid valve, controls the solenoid valve operation through central control module to with the intercommunication or the isolation of storage case and transfer box, the blowing of being convenient for. Carbon source materials put in the storage box enter the Z-shaped connecting channel through the transfer box, are accurately weighed by the weighing platform and then enter the circulating water filtering pool through the discharging mixing part, and the discharge amount of the storage box is measured. The peristaltic pump is matched with the water inlet pipe, and the relatively clean water body in upper strata is pumped to Z type interface channel in the recirculating aquaculture pond, washes Z type interface channel's inside and drives the carbon source of input and discharge in the recirculating water filter material pond. The carbon source is put into the circulating water filter material pool and then is fully mixed with the water body, fine suspended matters with larger particles in the water are intercepted by the micro-filter, and granular dirt and soluble organic matters formed by cellulose, protein, bait residues and the like mixed in the water are adsorbed by the protein separator, and the foam is removed, so that the cleanness of the water body entering the circulating water culture pool is ensured.

The water quality monitoring device can collect water samples from the water outlet end of the protein separator and the circulating water culture pond respectively, determine indexes of water body TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, dissolved oxygen, pH and the like, and the central control module judges the water quality condition of the water body according to the test results of the indexes. The central control module can also be connected with display interfaces such as a display screen and the like, so that the monitoring result of the water quality monitoring device is displayed, and the water quality monitoring device is convenient for operators to monitor in real time and adjust at any time.

The bacterial community in the water body can be influenced by adding the additional carbon source into the circulating water culture pond, and the generation of aged bacterial floccules in the water body is delayed or avoided. The addition of the extra carbon source can stimulate the growth and the propagation of heterotrophic bacteria in the water body, promote the denitrification, eliminate ammonia nitrogen in the aquaculture water environment and balance the accumulation of inorganic nitrogen in the water body, thereby prolonging the time interval of water change of the aquaculture water body.

According to one embodiment of the invention, a horizontally arranged stirring shaft is arranged inside the transfer box, the outer side wall of the stirring shaft is fixedly connected with a helical blade, and the stirring shaft is connected with the output end of the servo motor.

Thereby, the helical blade can rotate in the vertical plane under the driving of the stirring shaft. Therefore, after the carbon source released from the storage box enters the transfer box, the carbon source can be further mixed under the stirring action of the spiral blades, and the balance of carbon source substances is improved.

Further, the length of (mixing) shaft is equivalent with the width of transfer box inner space, and helical blade covers the length of the inside whole (mixing) shaft of transfer box, with the stirring space maximize, guarantees carbon source material intensive mixing.

According to one embodiment of the invention, the output end of the peristaltic pump is provided with a water inlet assembly, and the water inlet assembly comprises a water inlet pipe, a protective cover and a filter head; the protective cover is a cover body structure with the top end closed and the bottom opened, and the water outlet end of the water inlet pipe penetrates through the side wall of the protective cover and is fixed inside the protective cover; the filter head is a cylinder structure with an opening at one end and a closed end, the surface of the filter head is provided with filter holes, and the filter head is sleeved and connected with the water outlet end of the water inlet pipe.

Therefore, the water inlet end of the water inlet pipe is connected with the recirculating aquaculture pond, and the water outlet end of the water inlet pipe is communicated with the Z-shaped connecting channel. Specifically, the water outlet end of the water inlet pipe is arranged at the upstream of the weighing platform. After the carbon source is put in and weighed, the central control module controls the peristaltic pump to pump relatively clean water from the upper layer of the circulating water culture pond and release the water at the upstream of the weighing platform. The inside of Z type connecting channel is washed to the water that the peristaltic pump extracted, prevents the adhesion of carbon source material, improves the degree of accuracy of carbon source input volume to accelerate dissolving, mixing of carbon source material at the impact in-process, improve the equilibrium, the stability of water.

The water outlet end of the water inlet pipe is provided with the filter head, so that the water body entering the Z-shaped connecting channel is filtered, large-particle impurities can be prevented from entering the Z-shaped connecting channel, the cleanliness is improved in the water body circulation process, and the possibility of water body pollution is reduced. On the other hand, the filter head is a barrel structure, and the water can be ejected from different angles when being discharged, so that the inner wall of the Z-shaped connecting channel can be impacted from different directions, the jet dead angle is reduced, carbon source substances are prevented from being adhered to the inner wall of the Z-shaped connecting channel, and the water flowing out of the water inlet pipe is mixed with the carbon source substances below the water inlet pipe from different angles, the contact area is enlarged, and the mixing of the water and the carbon source substances is accelerated.

The water outlet end of the water inlet pipe is provided with a protective cover, so that the protection of the water inlet pipe and the filter head can be enhanced. The protective cover can be umbrella-shaped or flat-top umbrella-shaped, and the open end of the protective cover faces downwards, and can resist the impact from the upper part for the water inlet pipe and the filter head.

Furthermore, the water outlet end of the water inlet pipe is arranged in the transfer box and is arranged above the helical blade and below the electromagnetic valve of the storage box. Therefore, the water inlet assembly, especially the protective cover can buffer carbon source substances discharged from the electromagnetic valve in the direction to a certain extent, the impact force in the falling process is reduced, and the spiral blades are protected to a certain extent. In addition, the carbon source substances discharged from the electromagnetic valve can fall downwards from different directions under the guiding action of the protective cover, so that the accumulation of the carbon source substances can be avoided, the dispersion of caking substances is facilitated, the stirring difficulty is reduced, and the protection of the helical blades is enhanced. In addition, the water outlet end of the water inlet pipe is arranged above the spiral blades, the spiral blades can be washed during drainage, carbon source substances are prevented from remaining on the spiral blades, and finally washed water enters the weighing platform to bring the carbon source substances into the circulating water filter tank.

According to one embodiment of the invention, the outlet end of the Z-shaped connecting channel is connected with a discharging and mixing piece; the discharging and mixing part comprises a vertically arranged discharging outer box, the top of the discharging outer box is provided with a feeding hole, the bottom of the feeding hole is provided with a discharging hole, the feeding hole is connected with the outlet end of the Z-shaped connecting channel, and the discharging hole is connected with the circulating water filter material pool;

a crushing component is arranged in the discharging outer box; the crushing assembly is positioned right below the feeding hole and comprises a rotating wheel and a cotton wool breaking plate which are correspondingly arranged; the rotating wheel can rotate along with a rotating shaft which is horizontally arranged, the rotating shaft is connected with the output end of the motor, the wadding breaking plate is a curved arc-shaped plate, the concave surface of the wadding breaking plate is arranged opposite to the outer edge of the rotating wheel, a gap is reserved between the wadding breaking plate and the rotating wheel, a swinging rod in the horizontal direction is arranged in the middle of the wadding breaking plate, and the wadding breaking plate can swing left and right by taking the swinging rod as a shaft; the outer side wall of the rotating wheel is provided with a rack which protrudes outwards along the radial direction, and the concave surface of the wadding breaking plate is provided with sawteeth which correspond to the rack in the axial direction.

The carbon source substances fed by the carbon source feeding device are further mixed by the discharging and mixing piece before entering the circulating water filter material pool. And the carbon source and the water body discharged from the Z-shaped connecting channel act with the crushing assembly after entering the discharging outer box. When carbon source substances flow through the crushing assembly along with water, the rotating wheel continuously rotates and plays a role in guiding flow. Under the action of carbon source substances, water and the rotating wheel, the flocculation breaking plate swings left and right around the swinging rod and is matched with the rotating wheel in the swinging process. The in-process that broken wadding board swayed drives and establishes sawtooth on the concave surface and rack toothing or separation on the runner on to water and the carbon source material that flow through extrude, grind, reduce the flocculation effect of carbon source material, improve the mixed degree of carbon source material and water, the extension water of changing interval time.

Specifically, the saw teeth on the flocculation breaking plate can completely cover the whole concave surface, so that the grinding area is large enough, the grinding path is prolonged, the dissolving time of a carbon source in water is shortened, and the mixing effect is enhanced. The sawtooth on the broken bat board also can only be in the lower half section setting of broken bat board, reduces the degree of wear to the first half section of broken bat board can also play the water conservancy diversion effect. In the swinging process of the flocculation breaking plate, more carbon source substances and water flow entering the gap between the flocculation breaking plate and the rotating wheel are larger, and the mixing effect is improved.

According to one embodiment of the invention, the inner part of the discharging outer box is sleeved with the discharging inner box, the top and the bottom of the discharging inner box are both provided with openings, and a gap is formed between the side wall of the discharging inner box and the side wall of the discharging outer box; the discharging inner box is positioned below the crushing assembly; arrange the lateral wall of material inner box and dispose the air inlet, the air inlet is connected with the intake pipe, and the air inlet was kept away from to the intake pipe one end passes the lateral wall and the outside air intercommunication of arranging the material outer container. The one end that the row material inner box was kept away from to the intake pipe is connected with the air-blower, can be to row the material inner box blast air.

From this, admit air at the mixing process of carbon source material and water, the broken subassembly at cooperation top reaches the effect of carbon source material and the abundant contact of water, improves the mixed degree of carbon source material and water, realizes reducing the effect of the dissolution time of discharged carbon source in aqueous. The gas is introduced into the carbon source substance and the water body, part of the gas is dissolved in the mixture of the carbon source and the water body and then enters the circulating water filtering pond, and part of the gas is dispersed in the mixture of the carbon source and the water body in the form of bubbles, so that the microbial community structure and the microbial activity in the aquaculture water body can be regulated and controlled through the gas, and the water body environment of aquaculture is improved. On the other hand, the flow velocity of the discharged water body during carbon source throwing can be reduced through the water body containing gas.

According to one embodiment of the invention, the inner side wall of the material discharging inner box is provided with a trapezoidal material guiding block, and the material guiding block is positioned above the air inlet; the top of the material guiding block is an inclined plane from top to bottom, and the bottom of the material guiding block is an inclined plane from bottom to top.

From this, can carry out dual direction to material and the gas in arranging the material inner box through the guide block: the carbon source water mixture flowing downwards from the top of the discharging outer box is guided downwards by the inclined plane at the top of the guide block, and the gas entering from the gas inlet is guided upwards by the inclined plane at the bottom of the guide block, so that the reverse flow of the gas and the water is formed, the carbon source substance is further mixed with the water, the mixing effect of the gas and the carbon source water mixture is improved, the dissolving time is shortened, and the uniformity of the carbon source water mixture is improved.

Furthermore, a plurality of air inlets are evenly distributed on the side wall of the material discharging inner box, and the air inlets and the material guide blocks are arranged in a one-to-one correspondence mode.

According to one embodiment of the invention, an ultraviolet disinfection device and a buffer tank are sequentially arranged between the protein separator and the circulating water culture pond; the buffer pool is connected with the oxygen delivery device and the pH adjusting device.

Therefore, after the carbon source substance is mixed with the water body and dirt is removed, the carbon source substance is disinfected by the ultraviolet disinfection device, and the safety performance is improved. And (3) the disinfected carbon source water mixture enters a buffer pool, and the oxygen content and the pH value of the carbon source water mixture are adjusted by adopting an oxygen delivery device and a pH adjusting device, so that the oxygen content and the pH value of the carbon source water mixture meet the growth requirements of the cultured aquatic animals.

According to one embodiment of the invention, the water quality monitoring device comprises a group of first monitoring components, second monitoring components and third monitoring components; the first monitoring assembly is used for monitoring the turbidity of water and is arranged between the protein separator and the ultraviolet disinfection device; the second monitoring subassembly is located between ultraviolet degassing unit and the buffer pool, and the third monitoring subassembly is located between buffer pool and the recirculating aquaculture pond, and the second monitoring subassembly all is used for monitoring quality of water TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, dissolved oxygen, pH with the third monitoring subassembly.

Furthermore, an electromagnetic valve is arranged on the water inlet of the ultraviolet disinfection device and connected with the central control module, and the central control module can control the operation of the electromagnetic valve according to the measurement result of the water quality monitoring device. When the determination result of the first monitoring assembly shows that the turbidity of the water discharged by the protein separator is greater than the preset value, the central control module controls the electromagnetic valve of the ultraviolet disinfection device to start to perform ultraviolet disinfection, and when the determination result of the first monitoring assembly is less than the preset value, the central control module controls the electromagnetic valve of the ultraviolet disinfection device to close to stop the ultraviolet disinfection.

Furthermore, an electromagnetic valve is arranged on the water inlet of the buffer pool and connected with the central control module, and the central control module can control the operation of the electromagnetic valve according to the measuring result of the water quality monitoring device. When the measuring result of the second monitoring assembly shows that one or more of the indexes of TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and the like of the mixed water body are abnormal and are larger than a preset value, the central control module controls the electromagnetic valve at the water inlet of the buffer pool to close, and water circulation is stopped. And when the measurement result of the third monitoring assembly shows that the indexes of the TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and the like of the mixed water body accord with the preset values, the central control module controls the electromagnetic valve of the water inlet of the buffer tank to be opened, and the water circulation is restarted.

Furthermore, the oxygen delivery device is provided with a battery valve, the pH adjusting device is provided with a battery valve, the two electromagnetic valves are connected with the central control module, and the central control module can control the operation of the two electromagnetic valves according to the measuring result of the water quality monitoring device. When the measurement result of the second monitoring component shows that the dissolved oxygen and the pH value of the mixed water body are smaller than the preset indexes, the central control module controls the corresponding electromagnetic valve to operate, and starts the oxygen delivery device to deliver oxygen or starts the pH adjusting device to adjust the pH value. When the measurement result of the third monitoring assembly shows that the indexes of dissolved oxygen, pH and the like of the mixed water body accord with the preset values, the central control module controls the electromagnetic valve at the water inlet of the buffer pool to open, and the water circulation is restarted.

According to one embodiment of the present invention, the circulating water filter material pool is connected to a strain adding device, and the operation of the strain adding device is controlled by the central control module. Therefore, the concentration of the thalli in the circulating water culture pond can be adjusted as required, and the health and the excellence of the culture environment are ensured.

The invention is provided with the carbon source adding device and the water quality monitoring device, and is matched with the central control module, so that the content of the carbon source in the water body can be timely and automatically adjusted according to the real-time dynamic state of the aquaculture water body, the adding amount of the carbon source is controlled, the accuracy and the controllability of the adding of the carbon source are ensured, and the automation level is high. The mixing degree of carbon source material can be improved in the cooperation of (mixing) shaft and helical blade, arranges the setting that expects the mixed piece and can further improve the mixing degree of carbon source material and water, improves mixing efficiency, reinforcing mixing effect. Therefore, the carbon source control system is an externally added carbon source control system in recirculating aquaculture, which has high automation level, adjustable feeding amount and good mixing degree, and can effectively prolong the interval time of water change of aquaculture water bodies.

Drawings

FIG. 1 is a schematic perspective view of a carbon source adding apparatus of an external carbon source control system in recirculating aquaculture according to embodiment 1 of the present invention;

FIG. 2 is a plan view of the carbon source adding apparatus shown in FIG. 1;

FIG. 3 isbase:Sub>A schematic sectional view of the carbon source adding apparatus shown in FIG. 2 taken along the line A-A;

FIG. 4 is a schematic structural view of the stirring assembly shown in FIG. 3;

FIG. 5 is a side view of a discharging and mixing element of the system for controlling an external carbon source in recirculating aquaculture according to example 1 of the present invention;

FIG. 6 is a schematic cross-sectional view of the discharge mix of FIG. 5 taken along line B-B;

FIG. 7 is a schematic view of the batt breaking plate shown in FIG. 6;

FIG. 8 is a schematic cross-sectional view of a carbon source adding apparatus of an external carbon source control system in recirculating aquaculture according to embodiment 2 of the present invention;

FIG. 9 is a schematic structural view of the water intake assembly shown in FIG. 8;

FIG. 10 is a schematic cross-sectional view of a discharge mixing member of an external carbon source control system in recirculating aquaculture according to embodiment 2 of the present invention;

FIG. 11 is a schematic structural diagram of a system for controlling an external carbon source in recirculating aquaculture in accordance with embodiment 2 of the present invention;

reference numerals: 11. a material storage box; 12. a transfer box; 13. a Z-shaped connecting channel; 14. connecting the pipe body; 151. a stirring shaft; 152. a helical blade; 153. a servo motor; 16. a weighing platform; 171. a water inlet pipe; 172. a protective cover; 173. a filter head; 174. a filtration pore; 21. a discharging outer box; 211. a feed inlet; 212. a discharge port; 22. a crushing assembly; 231. a rotating wheel; 232. a rotating shaft; 233. a rack; 24. breaking the wadding plate; 241. a swing lever; 242. saw teeth; 25. a discharge inner box; 26. an air inlet; 27. an air inlet pipe; 271. an air intake passage; 28. a material guide block; 29. a guide plate.

Detailed Description

The technical scheme of the invention is further described in detail by combining the detailed description and the attached drawings:

example 1

Fig. 1 to 7 schematically show an additional carbon source control system for use in recirculating aquaculture for water quality treatment and optimization in a recirculating aquaculture system according to an embodiment of the present invention. As shown in the figure, the device comprises a carbon source adding device, a circulating water filter material pool, a micro-filter, a protein separator, an ultraviolet disinfection device, a buffer pool and a circulating aquaculture pool which are connected in sequence.

Wherein, a carbon source adding device is also arranged at the upstream of the circulating water filter material pool, and a water quality monitoring device is arranged between the protein separator and the circulating water culture pool. The water quality monitoring device comprises a first monitoring component, a second monitoring component and a third monitoring component, wherein the first monitoring component is arranged between the protein separator and the ultraviolet disinfection device and is used for monitoring the water quality turbidity at the water outlet end of the protein separator; the second monitoring assembly is arranged between the ultraviolet disinfection device and the buffer pool and used for monitoring indexes such as TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, dissolved oxygen and pH value of water quality at the water outlet end of the ultraviolet disinfection device, and the third monitoring assembly is arranged between the buffer pool and the recirculating aquaculture pool and used for monitoring indexes such as TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, dissolved oxygen and pH value of water quality in the buffer pool and the recirculating aquaculture pool. In addition, the system for controlling the external carbon source is also provided with a central control module, the first monitoring assembly, the second monitoring assembly and the third monitoring assembly are all connected with the central control module and can feed back a water quality measuring result to the central control module, and the central control module comprises an intelligent display screen and can be used for displaying the measuring result of the water quality monitoring device in real time. The central control module can receive the water quality information. And the central control module analyzes whether additional carbon sources need to be added in the water body in the circulating water culture pond and the weight of the required carbon source substances according to the test result of the third monitoring assembly. If the carbon source is required to be added, the central control module can control the carbon source adding device, the ultraviolet disinfection device, the buffer pool and the like to operate.

As shown in fig. 1 to 3, the carbon source adding device includes a storage box 11, a transfer box 12 and a Z-shaped connecting channel 13 connected in sequence. Wherein, the storage box 11 is located right above the transfer box 12, and the connection between the two is configured with an electromagnetic valve a, the carbon source material is filled in the storage box 11, and the electromagnetic valve a is connected with the central control module. The central control module can control the electromagnetic valve a to be opened, the storage box 11 is communicated with the transfer box 12, and a certain amount of carbon source materials are put into the transfer box 12; the central control module controls the electromagnetic valve a to be closed, the storage box 11 and the transfer box 12 are isolated from each other, and leakage of carbon source materials can be avoided.

An agitation assembly is disposed within the transfer box 12. The stirring assembly comprises a rod-shaped stirring shaft 151 horizontally arranged, and the outer side wall of the stirring shaft 151 is fixedly connected with a helical blade 152. One end of the stirring shaft 151 is connected to an output end of the servo motor 153. The operation of the servo motor 153 is also controlled by the central control module. The servo motor 153 is operated to drive the stirring shaft 151 to rotate the helical blades 152 in a vertical plane.

The carbon source material is released from the storage tank 11 to the transfer tank 12 and is agitated by the screw blades 152 while falling down to the foot plate assembly, thereby allowing the different components in the carbon source material to be mixed well. Helical blade 152 has covered the (mixing) shaft 151 and has been located the whole length scope of transshipment box 12, and the stirring space is enough abundant, prevents to stir the dead angle, makes the carbon source physics of input more balanced.

The carbon source material stirred and mixed by the helical blades 152 enters the Z-shaped connecting channel 13 from the outlet end arranged at the bottom of the side wall of the transfer box 12. The inlet end of the Z-shaped connecting channel 13 is arranged above the outlet end, a connecting pipe body 14 extending in the vertical direction is arranged between the inlet end and the outlet end, a bending part is formed at the joint of the inlet end of the Z-shaped connecting channel 13 and the connecting pipe body 14 and the joint of the outlet end and the connecting pipe body 14, and a weighing platform 16 is arranged at the bottom of the bending part and can be used for weighing the weight of the thrown carbon source substances. The weighing platform 16 is connected with the central control module, and can feed back the weighed weight of the carbon source substances to the central control module and display the weighed weight in the intelligent display screen.

A peristaltic pump is also provided on the Z-shaped connecting channel 13, upstream of the weighing station 16. The peristaltic pump is communicated with the circulating water culture pond through a pipe fitting. Specifically, the output end of the peristaltic pump is provided with a water inlet assembly, the water inlet assembly comprises a water inlet pipe 171, and the water outlet end of the water inlet pipe 171 penetrates through the side wall of the Z-shaped connecting pipe and is arranged over against the weighing platform 16. The end of inlet tube 171 is equipped with filter 173, can filter the water that gets into in the Z type interface channel 13, improves the cleanliness factor. The operation of the peristaltic pump is controlled by the central control module. Generally, after the weighing platform 16 weighs enough carbon source substances, the central control module controls the electromagnetic valve a to close, and stops feeding. Then, the peristaltic pump is started according to an instruction of the central control module, relatively clean water is sucked from the upper layer of the circulating water culture pond, the water is released from the position right above the weighing platform 16, the thrown carbon source substances are mixed and dissolved while the inside of the Z-shaped connecting channel 13 is washed, and the carbon source substances are carried to flow to the outlet end of the Z-shaped connecting channel 13. The water body and the carbon source material interact and are mixed with each other. Under the impact action of the water body, the dissolution of the carbon source substances can be accelerated, the mixing degree of the carbon source substances and the water body is improved, and a carbon source water body mixture is formed.

The outlet end of the Z-shaped connecting channel 13 is connected with a discharging and mixing piece. The discharging and mixing part comprises a discharging outer box 21 which is vertically arranged, the top of the discharging outer box 21 is provided with a feeding hole 211, and the bottom of the discharging outer box is provided with a conical discharging hole 212. The feed inlet 211 is connected with the outlet end of the Z-shaped connecting channel 13, and the discharge outlet 212 is connected with the circulating water filter material pool.

The inside of arranging material outer container 21 is divided into upper and lower two parts, and upper portion is equipped with broken subassembly 22, and the lower part cover is equipped with row material inner box 25, arranges material outer container 21 and arranges material inner box 25 and is the approximate columniform tubular structure. The crushing assembly 22 is arranged right below the feeding hole 211, the bottom of the crushing assembly 22 is opposite to the top opening of the discharging inner box 25, and the bottom opening of the discharging inner box 25 is arranged corresponding to the discharging hole 212 of the discharging outer box 21.

As shown in fig. 6 and 7, the crushing assembly 22 includes a rotating wheel 231 and a floc breaking plate 24 which are arranged in a left-right matching manner. Wherein, runner 231 center is equipped with the pivot 232 of horizontal direction, and pivot 232 links to each other with the output of motor, and under the drive of motor, runner 231 can rotate clockwise in vertical plane along with pivot 232, and broken bat board 24 sets up the right side at runner 231. The floc breaking plate 24 is a curved arc-shaped plate, the concave surface of the floc breaking plate 24 is arranged opposite to the outer edge of the rotating wheel 231, a gap is left between the floc breaking plate 24 and the outer wall of the rotating wheel 231, and the curvature radius of the floc breaking plate 24 is equivalent to that of the outer edge of the rotating shaft 232. The central portion of the lint breaking plate 24 is provided with a horizontal swing lever 241, and the lint breaking plate 24 can swing left and right about the swing lever 241. The outer side wall of the runner 231 is uniformly arrayed with a plurality of racks 233 along the circumferential direction, and the racks 233 protrude outwards along the radial direction; the bottom of the concave surface of the lint board 24 is provided with a plurality of saw teeth 242, the saw teeth 242 protrude toward a side close to the gear, and the plurality of saw teeth 242 are provided corresponding to the rack 233. During the left-right swing of the breaker plate 24, the gap between the rotating wheel 231 and the breaker plate 24 is switched back and forth between the top-open bottom-closed state and the top-closed bottom-open state, and the saw teeth 242 at the bottom of the breaker plate 24 are also repeatedly switched between being engaged with and disengaged from the rack 233.

In this way, the carbon source water mixture discharged from the Z-shaped connecting channel 13 enters the discharging and mixing part through the feed inlet 211 and then acts with the crushing assembly 22 in the process of falling downwards. Part of the carbon source water mixture falls into the gap between the racks 233 and rotates to the right along with the rotating wheel 231, and enters the gap between the rotating wheel 231 and the flocculation breaking plate 24. The flocculation breaking plate 24 swings left and right under the action of the carbon source water mixture and the rotating wheel 231. When the carbon source water mixture rotates to the lower half part of the flocculation breaking plate 24 along with the rotating wheel 231, under the repeated action of 'engagement-separation-engagement' of the rack 233 and the saw teeth 242, the extrusion and far grinding of the flocculation breaking plate 24 are received, so that the agglomeration structure existing in the carbon source material is separated and broken, the large granular material is reduced, the contact area of the carbon source material and the water is increased, the dissolution of the carbon source material is promoted, the further mixing between different components of the carbon source material and the water is promoted, the flocculation effect of the carbon source material is reduced, and the interval time for water exchange of the water is prolonged.

After the further mixing of the crushing assembly 22, the carbon source water mixture flows downwards to the discharging inner box 25, the discharging inner box 25 can be used as a storage cavity of the carbon source water mixture, the carbon source water mixture is stored for a short time, and the mixing time is prolonged. The material discharging inner box 25 is sleeved inside the material discharging outer box 21, and a certain gap is reserved between the side walls of the material discharging inner box and the material discharging outer box. The side wall of the inner discharging box 25 is provided with a plurality of air inlets 26, and the air inlets 26 are uniformly distributed on the side wall of the inner discharging box 25. The air inlet 26 is connected with an air inlet pipe 27, and one end of the air inlet pipe 27 far away from the air inlet 26 penetrates through the side wall of the discharging outer box 21 to be communicated with the outside air. An air blower is connected to one end of the air inlet pipe 27, which is far away from the material discharge inner box 25, and can blow air into the material discharge inner box 25.

The inner side of the material discharging inner box 25 is also provided with a plurality of trapezoidal material guiding blocks 28, and the material guiding blocks 28 are arranged in one-to-one correspondence with the air inlets 26. Specifically, the material guide block 28 is arranged right above the air inlet 26; the guide block 28 has two inclined surfaces, wherein the top of the guide block 28 is an inclined surface from top to bottom, and the bottom of the guide block 28 is an inclined surface from bottom to top. A guide plate 29 is arranged right below the air inlet 26, and the guide plate 29 is arranged in parallel with the inclined surface at the bottom of the guide block 28. Thus, the guide block 28 and the guide plate 29 form an air inlet passage 271 for the air passing through the air inlet 26, and have a certain guiding function for the air blown in from the air inlet pipe 27. The inclined surface at the top of the material guide block 28 guides the carbon source water mixture flowing downwards from the top.

In the process that the carbon source water mixture further mixed by the crushing assembly 22 flows downwards, a part of the carbon source water mixture flows downwards from the gap between the discharging inner box 25 and the discharging outer box 21 until the carbon source water mixture is discharged from the discharge hole 212 of the discharging outer box 21, a part of the carbon source water mixture directly enters the cavity of the discharging inner box 25 from the opening at the top of the discharging inner box 25, and a part of the carbon source water mixture enters the cavity of the discharging inner box 25 through the flow guiding effect of the material guide block 28 at the top of the discharging inner box 25. After the diversion, the mixing is carried out again, so that the uniformity of the carbon source water body mixture can be improved, and the dissolution of carbon source substances is promoted. On the other hand, the gas blown in through the gas inlet pipe 27 diffuses from bottom to top in the cavity of the material discharging inner box 25, and in the contact process with the carbon source water mixture flowing from top to bottom, the gas and the water mixture flow reversely, so that the flow direction of the carbon source water mixture can be changed to a certain extent, the mixing is promoted, the dissolution of the gas in the water can be accelerated, and the oxygen content in the carbon source water mixture is improved. In addition, the upward diffused airflow can also reduce the flow velocity of the carbon source water body mixture when the carbon source water body mixture is discharged from the discharging and mixing piece, and promote the mixing of the carbon source substances and the water body.

The carbon source water mixture is discharged into a circulating water filter material pool through a discharge mixing part, suspended matters in the carbon source water mixture can be intercepted through a micro-filter, impurities which are insoluble in water are removed, granular dirt and soluble organic matters formed by cellulose, protein, bait residues and the like mixed in water are adsorbed through a protein separator, foams are removed, and the water cleanliness is improved. The carbon source water mixture treated by the micro-filter and the protein separator enters the ultraviolet disinfection device, and can be put into a circulating water culture pond after being buffered by the buffer pond. The buffer pool is connected with the oxygen delivery device and the pH adjusting device, so that oxygen can be input into the carbon source water mixture in the buffer pool and the pH value can be adjusted as required, and the good culture environment is ensured.

The carbon source water mixture is mixed with the culture water after entering the circulating water culture pond, and the additionally added carbon source substances can convert residual baits, excrement, organic debris and the like in the culture environment into nutrient substances which can be utilized by omnivorous organisms, so that the production of aquatic animals is promoted, the material utilization efficiency of the baits is improved, and the interval time of water body water change is prolonged. In addition, the newly injected carbon source water mixture has high dissolved oxygen content and is wrapped by a large amount of bubbles, the colony structure and activity of microorganisms in the culture water can be regulated and controlled, and the microorganisms are prevented or delayed from entering the senescence and death period, so that the interval time of water change of the water body is further prolonged.

Specifically, be provided with a solenoid valve b on the ultraviolet disinfection device water inlet, be provided with a solenoid valve c on the buffer pool water inlet, oxygen therapy device has battery valve d, has battery valve e on the pH adjusting device, and solenoid valve b, solenoid valve c, solenoid valve d, solenoid valve e all are connected with central control module to it opens and closes all to be controlled by central control module:

when the measurement result of the first monitoring assembly shows that the turbidity of the water discharged from the protein separator is greater than the preset value, the central control module controls the electromagnetic valve b of the ultraviolet disinfection device to start to perform ultraviolet disinfection, and when the measurement result of the first monitoring assembly is less than the preset turbidity value, the central control module controls the electromagnetic valve b of the ultraviolet disinfection device to close to stop performing ultraviolet disinfection;

when the measuring result of the second monitoring assembly shows that one or more of the indexes of TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and the like of the mixed water body are abnormal and are larger than a preset value, the central control module controls the electromagnetic valve c of the water inlet of the buffer pool to close, and water circulation is stopped. When the measurement result of the third monitoring assembly shows that the indexes of TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and the like of the mixed water body meet preset values, the central control module controls an electromagnetic valve c of the water inlet of the buffer pool to open, and water circulation is restarted;

when the measurement result of the second monitoring component shows that the dissolved oxygen and the pH value of the mixed water body are smaller than the preset indexes, the central control module controls the corresponding electromagnetic valve d or electromagnetic valve e to operate, starts the oxygen delivery device to deliver oxygen, or starts the pH adjusting device to adjust the pH value. When the measurement result of the third monitoring assembly shows that the indexes of dissolved oxygen, pH and the like of the mixed water body accord with the preset values, the central control module controls an electromagnetic valve c at the water inlet of the buffer pool to open, and the water circulation is restarted.

In the embodiment, the extra carbon source is automatically added into the circulating water culture pond to influence the bacterial community in the water body, so that the generation of aged bacterial floccules in the water body is delayed or avoided, and the consumption of the extra carbon source can be adjusted according to the culture requirements of each stage in the culture process. The addition of the extra carbon source can stimulate the growth and the propagation of heterotrophic bacteria in the water body, promote the denitrification, eliminate ammonia nitrogen in the aquaculture water environment and balance the accumulation of inorganic nitrogen in the water body, thereby prolonging the time interval of water change of the aquaculture water body. The method comprises the steps of dissolving and mixing additionally added carbon source substances by using a water body in the circulating water culture pond, carrying out operations such as descaling, disinfection, oxygen delivery, pH regulation and the like on a carbon source water mixture, improving the water quality of the water body in the circulating water culture pond by using the newly added carbon source water mixture, improving the biological activity of microorganisms, preventing or delaying the aging of the microorganisms, reducing the generation of bacterial floccules, improving the utilization rate of the water body in the circulating water culture pond, and prolonging the water changing time interval.

Example 2

Fig. 8 to 11 schematically show an additional carbon source control system for recirculating aquaculture according to another embodiment of the present invention, which is different from example 1 in that:

the water inlet assembly provided at the output of the peristaltic pump comprises a water inlet tube 171, a protective cover 172 and a filter head 173. The water outlet end of the water inlet pipe 171 is arranged inside the transfer box 12, and is arranged above the helical blade 152 and the storage box 11 electromagnetic

Below the valve. The protective cover 172 is a cover body structure with a closed top end and an open bottom, the water outlet end of the water inlet pipe 171 penetrates through the side wall of the protective cover 172 and is fixed inside the protective cover 172, the filter head 173 is sleeved with the water outlet end of the water inlet pipe 171 and is connected with the water outlet end of the water inlet pipe 171, the filter head 173 is a cylinder structure with an open end and a closed end, and the surface of the filter head 173 is provided with filter holes 174.

The water inlet assembly is arranged in the box body of the transfer box 12, and in the process that carbon source materials are fed downwards from the material storage box 11, the water inlet assembly, particularly the protective cover 172, can buffer the carbon source materials to a certain extent, reduce the impact force in the falling process of the carbon source materials, and protect the spiral blades 152 to a certain extent. In addition, the protective cover 172 has a certain guiding effect on the carbon source substances, so that the carbon source substances discharged from the electromagnetic valve a can fall downwards from different directions, accumulation of the carbon source substances at one point in the transfer box 12 can be avoided, dispersion of agglomerated substances is facilitated, stirring difficulty is reduced, and protection of the helical blades 152 is enhanced. In addition, the water outlet end of the water inlet pipe 171 is arranged above the helical blades 152, so that the helical blades 152 can be washed during water drainage, carbon source substances are prevented from remaining on the helical blades 152, and finally, the washed water body enters the weighing platform 16 to bring the carbon source substances into the circulating water filter tank.

In the discharging mixing part, the side wall of the discharging inner box 25 is provided with a plurality of air inlets 26, the inner wall of the discharging inner box 25 is provided with a plurality of material guiding blocks 28, and the material guiding blocks 28 correspond to the air inlets 26 one by one. The bottom of the material guide block 28 is provided with an air inlet passage 271, and the air inlet passage 271 is communicated with the air inlet 26. The air inlet channel 271 extends from one end close to the side wall of the material discharging inner box 25 to the central axis of the material discharging inner box 25, and is arranged obliquely from bottom to top, and the air inlet channel 271 is arranged in parallel with the inclined plane at the bottom of the material guide block 28. In this manner, the guide effect on the intake air can be enhanced by the intake passage 271.

In addition, the circulating water filter material pool is also connected with a strain adding device, and the operation of the strain adding device is controlled by the central control module. Therefore, the concentration of the thalli in the circulating water culture pond can be adjusted as required, and the health and the excellence of the culture environment are ensured.

The embodiments described above are intended to illustrate the technical solutions of the present invention in detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modification, supplement or similar substitution made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An external carbon source control system in circulating water culture is characterized by comprising a circulating water filter material pool, a micro-filter, a protein separator and a circulating water culture pool which are sequentially connected; a water quality monitoring device is arranged between the protein separator and the circulating water culture pond; the circulating water filter material pool is connected with a carbon source adding device; the water quality monitoring device and the carbon source adding device are both connected with a central control module, and the central control module can control the operation of the carbon source adding device according to information fed back by the water quality detecting device;

the carbon source adding device comprises a storage box (11), a transfer box (12) and a Z-shaped connecting channel (13) which are sequentially connected, and an electromagnetic valve is arranged at the joint of the storage box (11) and the transfer box (12); the outlet end of the Z-shaped connecting channel (13) is communicated with the circulating water filter material pool; the carbon source adding device is communicated with the circulating water culture pond through a peristaltic pump;

a weighing platform (16) is arranged inside the Z-shaped connecting channel (13), the weighing platform (16) is positioned at the bottom of a bending part of the Z-shaped connecting channel (13), the weighing platform (16) is positioned below the transfer box (12) in the vertical direction, the weighing platform (16) is connected with the central control module, and the peristaltic pump is positioned at the upstream of the weighing platform (16); the operation of the electromagnetic valve and the peristaltic pump is controlled by the central control module;

a horizontally arranged stirring shaft (151) is arranged in the transfer box (12), the outer side wall of the stirring shaft (151) is fixedly connected with a helical blade (152), and the stirring shaft (151) is connected with the output end of a servo motor (153);

the outlet end of the Z-shaped connecting channel (13) is connected with a discharging and mixing piece; the discharging and mixing part comprises a discharging outer box (21) which is vertically arranged, the top of the discharging outer box (21) is provided with a feeding hole (211), the bottom of the discharging outer box (21) is provided with a discharging hole (212), the feeding hole (211) is connected with the outlet end of the Z-shaped connecting channel (13), and the discharging hole (212) is connected with the circulating water filtering material pool;

a crushing assembly (22) is arranged in the discharging outer box (21); the crushing assembly (22) is positioned right below the feeding hole (211), and the crushing assembly (22) comprises a rotating wheel (231) and a floc breaking plate (24) which are correspondingly arranged; the rotating wheel (231) can rotate along with a rotating shaft (232) which is horizontally arranged, the wadding breaking plate (24) is a curved arc-shaped plate, the concave surface of the wadding breaking plate (24) is arranged opposite to the outer edge of the rotating wheel (231), a gap is formed between the wadding breaking plate (24) and the rotating wheel (231), a swinging rod (241) in the horizontal direction is arranged in the middle of the wadding breaking plate (24), and the wadding breaking plate (24) can swing left and right by taking the swinging rod (241) as a shaft;

the outer side wall of the rotating wheel (231) is provided with racks (233) protruding outwards in the radial direction, and the concave surface of the floc breaking plate (24) is provided with saw teeth (242) meshed with the racks (233);

in the process of swinging the floc breaking plate (24) left and right, the gap between the rotating wheel (231) and the floc breaking plate (24) is switched back and forth between the top opening and the bottom closing and the top opening, and the saw teeth (242) at the bottom of the floc breaking plate (24) are also switched repeatedly between being meshed with and separated from the rack (233);

an inner discharging box (25) is sleeved inside the outer discharging box (21), openings are formed in the top and the bottom of the inner discharging box (25), and a gap is formed between the side wall of the inner discharging box (25) and the side wall of the outer discharging box (21); the discharge inner box (25) is positioned below the crushing assembly (22);

an air inlet (26) is arranged on the side wall of the discharging inner box (25), the air inlet (26) is connected with an air inlet pipe (27), and one end, far away from the air inlet (26), of the air inlet pipe (27) penetrates through the side wall of the discharging outer box (21) to be communicated with the outside air;

a trapezoidal material guide block (28) is arranged on the inner side wall of the material discharging inner box (25), and the material guide block (28) is positioned above the air inlet (26); the top of the material guide block (28) is an inclined plane from top to bottom, and the bottom of the material guide block (28) is an inclined plane from bottom to top.

2. The system for controlling a carbon source as claimed in claim 1, wherein the output end of the peristaltic pump is provided with a water inlet assembly, and the water inlet assembly comprises a water inlet pipe (171), a protective cover (172) and a filter head (173);

the protective cover (172) is of a cover body structure with a closed top end and an open bottom, and the water outlet end of the water inlet pipe (171) penetrates through the side wall of the protective cover (172) and is fixed inside the protective cover (172);

the filter head (173) is a cylinder structure with one end open and the other end closed, the surface of the filter head (173) is provided with filter holes (174), and the filter head (173) is connected with the water outlet end of the water inlet pipe (171) in a sleeved mode.

3. The system for controlling the external carbon source as claimed in claim 1, wherein an ultraviolet disinfection device and a buffer tank are further arranged between the protein separator and the recirculating aquaculture pond in sequence; the buffer pool is connected with the oxygen delivery device and the pH adjusting device.

4. The system for controlling an added carbon source as claimed in claim 3, wherein the water quality monitoring device comprises a set of a first monitoring component, a second monitoring component and a third monitoring component;

the first monitoring assembly is used for monitoring the turbidity of water and is arranged between the protein separator and the ultraviolet disinfection device;

the second monitoring assembly and the third monitoring assembly are used for monitoring TOC, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, dissolved oxygen and pH of water; the second monitoring assembly is arranged between the ultraviolet disinfection device and the buffer tank, and the third monitoring assembly is arranged between the buffer tank and the recirculating aquaculture tank.

5. The system as claimed in claim 1, wherein the circulating water filter medium tank is connected to a strain adding device, and the operation of the strain adding device is controlled by the central control module.