CN103081843A - Centralization indoor constant temperature circulation aquaculture system - Google Patents

Centralization indoor constant temperature circulation aquaculture system Download PDF

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Publication number
CN103081843A
CN103081843A CN2011103448069A CN201110344806A CN103081843A CN 103081843 A CN103081843 A CN 103081843A CN 2011103448069 A CN2011103448069 A CN 2011103448069A CN 201110344806 A CN201110344806 A CN 201110344806A CN 103081843 A CN103081843 A CN 103081843A
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China
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water
sewage
recirculation
aquaculture
culturing
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CN2011103448069A
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Chinese (zh)
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CN103081843B (en
Inventor
郭益顿
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喃嵘水产(上海)有限公司
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Publication of CN103081843A publication Critical patent/CN103081843A/en
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Abstract

The invention discloses a centralization indoor constant temperature circulation aquaculture system which includes two aquaculture ponds arranged side by side. A water inlet and a water outlet are arranged in each aquaculture pond. An aerator and a swell machine are arranged in each aquaculture pond. The centralization indoor constant temperature circulation aquaculture system is characterized in that the two aquaculture ponds are made of thermal insulation materials. A sewage treatment system is arranged between the two aquaculture ponds. A suction sewage device is arranged at the end of water outputting of each aquaculture pond. The suction sewage device is connected with the sewage treatment system through a sewage pipe. A water outlet of the sewage treatment system communicates with each aquaculture pond. The centralization indoor constant temperature circulation aquaculture system has the advantage that circulation utilization of water for aquaculture is achieved so that the quality of aquaculture aquatic products is improved and pollution of sewage discharges to environment is reduced.

Description

A kind of centralized constant indoor temperature recirculation system

Technical field

The present invention relates to aquaculture system, be specifically related to a kind of centralized constant indoor temperature recirculation system.

Background technology

Traditional aquaculture is all to utilize mud ground excavation culturing pool, cultivation various fish, shellfish and shrimps in the pond, and soil easily becomes sour, and produces mud.In breeding process because the excreta of the feed for nursing of remnants and fishes and shrimps can pollute water body in culturing pool; thereby reduce the survival rate of fishes and shrimps; therefore need to often change water; but due to this culturing pool generally more than 5 mu; therefore quantity of exchanged water is large; not only expend a large amount of water, the water that excretes can pollute river, lake, ocean.Can only change 15% ~ 20% of the whole water yield owing to changing water at every turn, most aquaculture products are in sub-health state, even if therefore the every per mu yield of output of cultivation reaches more than 1000 jin of high yields.Outdoor normal temperature cultivation, be restricted the cultivation of some local famous brand product in addition.

Summary of the invention

The object of the present invention is to provide a kind of centralized constant indoor temperature recirculation system, can realize that water body recycles, improve cultured output, enlarge breed variety.

to achieve these goals, technical scheme of the present invention is: a kind of centralized constant indoor temperature recirculation system, comprise two culturing pools that are arranged side by side that are located under constant temperature, this culturing pool is provided with water inlet and water side, aerator and surge machine are set in this culturing pool, these two culturing pools adopt the plastic cloth film to surround, it is characterized in that arranging between two culturing pools a cover sewage disposal system, water side at these two culturing pools is provided with sewage suction device, this sewage suction device is connected with sewage disposal system by sewage conduct, the delivery port of this sewage disposal system is communicated with culturing pool.This sewage disposal system solid-liquid separating machine, the outlet of solid-liquid separating machine successively with pumping plant be connected with the water inlet of two culturing pools after Protein Separation pond, biofiltration device are connected with the ultraviolet sterilization battle array.

The present invention adopts the special-purpose plastic cloth film of HDPE cultivation to carry out the Tu Shui isolation, prevent seepage, make pool inner water matter not be subjected to the impact of culturing pool soil property, due to the Tu Shui isolation, aquaculture product is difficult for breed bacteria, and disease is few, thereby reduces antibiotic use, aquaculture product has been removed bilgy odour simultaneously, has improved the edible quality of aquatic products.Use aerator can allow water quality keep containing oxygen condition, cultivation product absorptive amount to oxygen in the process of growing up is increasing gradually, thereby can reduce the mortality because of anoxic in breeding process of cultivation product always.Use surge machine not only can make the cultivation product and like the spray of living, and up and down water is replaced better, increase the dissolving of oxygen, reduce the several functions such as ammonia nitrogen, nitrous, hydrogen sulphide, can also make the low organic matter in pond and sunlight form better photosynthesis, produce the aquatile of fishes and shrimps happiness food.Dirt at the bottom of the pond is the discharge of the sewage suction device at the bottom of the pond with current, thereby has protected water body not to be subjected to secondary pollution.The sewage of discharging from sewage suction device is back in culturing pool after the processing of solid-liquid separating machine, protein segregating unit, biofiltration device and ultraviolet sterilization battle array.Can make organic manure from the mud that above-mentioned solid-liquid separating machine, protein segregating unit and biofiltration device are discharged.Major advantage of the present invention is to realize the recycling of breeding water, thereby improves the output of aquaculture product, reduces simultaneously sewage discharge to the pollution of environment.Due in the constant indoor temperature cultivation, can adapt to the cultivation of different aquatic products kinds, Shortening culturing period.In the present invention, two culturing pools share a cover sewage disposal system, make its highly effective.Through overtesting, adopt recirculation system of the present invention, every per mu yield can reach 20,000 jin, is more than 20 times of traditional aquaculture.

Description of drawings

Fig. 1 is the structural representation of one embodiment of the invention.

Fig. 2 is the A-A cutaway view.

Fig. 3 is system flow chart of the present invention.

Fig. 4 is the structure chart of sewage suction device.

Fig. 5 is the structural representation of biofiltration device.

Fig. 6 is the structural representation of the pumping plant of one embodiment of the invention.

Fig. 7 is the structural representation of the pumping plant of another embodiment of the present invention.

Embodiment

The invention will be further described below in conjunction with drawings and Examples.

as shown in the figure, a kind of centralized constant indoor temperature recirculation system, comprise two culturing pools that are arranged side by side 1 that are located under constant temperature, this culturing pool 1 is provided with water inlet and water side, at interior aerator 4 and the surge machine 5 of arranging of this culturing pool 1, it is characterized in that these two culturing pools adopt plastic cloth film 7 to surround, between two culturing pools, sewage disposal system 6 is set, water inlet at these two culturing pools arranges water feed apparatus, water side 3 arranges sewage suction device 8, this sewage suction device is connected with sewage disposal system by sewage conduct, the delivery port of this sewage disposal system is communicated with the water feed apparatus of culturing pool.This sewage disposal system comprises solid-liquid separation tank 9, this solid-liquid separation tank 9 is provided with sewage inlet segment and clear water water exit end, this sewage sump 4 is connected with the sewage inlet segment by sewage conduct, between this sewage inlet segment and clear water water exit end, solid-liquid separating machine 10 is set, the clear water water exit end is successively by being communicated with the water inlet of two culturing pools after Protein Separation pond 12, biofiltration device 13 and ultraviolet sterilization battle array 14.The clear water water exit end of solid-liquid separation tank is provided with pumping plant 11 and is communicated with the Protein Separation pond, and Protein Separation is provided with protein segregating unit 12 in the pond.The outlet of solid-liquid separating machine 10 is communicated with Protein Separation pond 12 by pumping plant 11.In order to play the effect of constant temperature, above-mentioned two culturing pools can be arranged in constant temperature cultivation factory building, described constant temperature cultivation factory building top arranges the arch roof design with insulation material, without support column.

According to a preferred embodiment of the invention, the inclined-plane is arranged in the bottom of this culturing pool 1, is convenient to sewage natural and flows out.The inclination angle on inclined-plane is 30 ~ 35 degree, and water inlet is positioned at the upper end on inclined-plane, and the water side is positioned at the lower end on inclined-plane, and the difference in height of this water inlet and water side is 3.2 ~ 3.8m.This structure can be convenient to the concentrated emission treatment of dirt, has power consumption less, effective characteristics.Be provided with feed throw-in machine 29 on the bank of culturing pool, be arranged side by side two aerators 4 near water inlet, aerator 4 is provided with blast pipe, and this blast pipe discharge directions arranges surge machine 5 towards the water side in the water side.This aerator not only can allow water quality keep containing oxygen condition always, also can impel dirt to flow to the water side.The water (flow) direction that this aerator forms as shown by the arrows in Figure 1, can reach the up and down water layer and exchange towards the water side when oxygenation, increase useful aquatic organism amount and oxygenation effect.Surge machine comprises electromotor and the floating vane that is connected with electromotor, and this surge machine is located on the water surface at culturing pool center, and its floating vane High Rotation Speed is raised to the surface with the water extraction of bottom, forms significantly wave.This surge machine adopts the applicant in a kind of floating body impeller type surge machine (200910201251.5) of application on December 16th, 2009.This surge machine not only can be made the cultivation product and like the spray of living, and up and down water is replaced better, increase the dissolving of oxygen, reduce the several functions such as ammonia nitrogen, nitrous, hydrogen sulphide, can also make the low organic matter in pond and sunlight form better photosynthesis.

This sewage suction device comprises chassis 16, chassis 16 is provided with an interpolation pipe 17, this interpolation pipe 17 is covered with soil pick-up cover 18, this soil pick-up cover bottom is evenly equipped with a plurality of through holes 19, the interpolation pipe top is provided with water inlet, and the bottom of interpolation pipe is provided with delivery port, and delivery port is successively by import elbow bend 25, center blow-off pipe 26 be connected elbow bend 27 and be connected with water valve pipe 28, the through-hole diameter of soil pick-up cover bottom is 220 ~ 280mm, and the spacing between interpolation pipe upper end and soil pick-up cover is 15 ~ 25mm.Under the effect of soil pick-up cover, upper mid-water and interpolation pipe isolation in culturing pool, and lower floor's sewage enters in the soil pick-up cover by the through hole of soil pick-up cover bottom, flows out via interpolation pipe, effectively keeps the upper strata clear water, removes the effect of lower floor's sewage.Maintain an equal level in the water surface and pond body in the water valve pipe, there is no air in this sewage suction device, when pulling out, opens the water valve pipe, sudden drawdown, water torrent and going out, in pipe, moment produces vacuum, current flow in the through hole of soil pick-up cover, via the space between soil pick-up cover and internal plug seat, from internal plug seat top water inlet, the pond body is discharged in the below water outlet.Due to the water-head that has 1 ~ 2 meter inside and outside culturing pool, current flow at the pipe inner curve, in water pressure, under the effect of atmospheric pressure and vacuum pressure, flow rate of water flow is accelerated, and flow increases, the suction multiplication, layer sewage under whole suctions pond, again because of culturing pool after aerator is fetched water, the principle of current uniform motion is concentrated dirt and is deposited in the water side, therefore reach middle level oxygenation, lower floor discharges the purpose of dirt.Adopt sewage suction device can at utmost keep overflowing of normal water body.

Fig. 3 is system flow chart of the present invention, for the sake of brevity, only shows in the drawings a culturing pool, should be appreciated that another culturing pool is identical with this culturing pool with the annexation of sewage disposal system.This solid-liquid separating machine is inclined in this solid-liquid separation tank, the angle of inclination is 25 ~ 35 degree, the upper end of this solid-liquid separating machine is provided with a centrifugal dirt colleceting bucket 15, this solid-liquid separating machine is collected the EM in water and residual bait thereof in centrifugal dirt colleceting bucket, by this centrifugal dirt colleceting bucket High Rotation Speed, isolated water is imported the clear water water exit end, collect in dirty pond and dirt is finally drained into.It is ZL200520048235.4 that this solid-liquid separating machine adopts the patent No., and dirt (solid) up is with through filter bag, cleans through high-pressure hydraulic pump, delivers to concentrated groove along sewage pipe, uses the centrifugal drier dehydration, and the remaining solid dirt is made fertilizer.This solid-liquid separating machine can be removed EM and the residual bait thereof in water, and the deterioration of anti-water-stop body need not backwash, and the aquaculture wastewater filter capacity reaches the isolated dirt of 500T/h and is squeezed into fertilizer, reaches zero and pollutes.Pumping plant can suck clear water in the Protein Separation pond, thereby has promoted the water body circulation; Protein segregating unit not only can allow the proteolipin and the harmful substance thereof that are suspended in clear water further be separated, and can drive away the greasy dirt thing in water.Biofiltration device has catharsis, but fast purification water quality reduces the breeding water body noxious materials such as ammonia nitrogen, nitrite, and no side effects.The ultraviolet sterilization battle array is used for killing water bacterium and unicellular organism thereof.

as shown in the figure, the biofiltration device that the present invention adopts comprises the intake chamber 20 that be arranged in parallel, biological filter pocket 21 and effluent trough 22, one end of intake chamber 21 is provided with water inlet 30, the other end of effluent trough 22 sets out the mouth of a river 31, intake chamber 20 is provided with into water dividing plate 23 with biological filter pocket 21 sides adjacent, the length of water inlet dividing plate 23 is 400 ~ 600cm, this water inlet dividing plate 23 bottoms are provided with several water inlet notches, width 20 ~ the 30cm of this water inlet notch, height 10 ~ 20cm, interval 20 ~ 30cm between adjacent two water inlet notches, biological filter pocket 21 is provided with water outlet dividing plate 24 with effluent trough 22 sides adjacent, the length of this water outlet dividing plate 24 is 400 ~ 600cm, this water outlet dividing plate 24 upper ends are provided with some water outlet notches, the width of this water outlet notch is 35 ~ 45cm, be highly 40 ~ 50cm, be spaced apart 90 ~ 100cm between two adjacent water outlet notches.In biological filter pocket, biological sheet (not shown) is set, its function is that the microorganism on biological sheet is decomposed with the ammonia nitrogen in the pond, reaches the safety that keeps ammonia nitrogen in water.This biology sheet is commercial product, does not repeat them here.

As shown in Figure 6, pumping plant 11 comprises a water pipeline 33, and an end of this water pipeline 33 is provided with a blade wheel chamber 34, is provided with impeller 35 in this blade wheel chamber 34, and the central shaft of this impeller 35 is connected with drive motors 36.In this embodiment, described blade wheel chamber 34 is arranged on water pipeline 33 inputs, and the upper end of blade wheel chamber 34 is input, and the lower end of blade wheel chamber 34 is output, and the lower end of blade wheel chamber 34 is connected with the input of water pipeline 33, and the output of water pipeline 33 is equipped with an one way stop peturn valve 37.When wheel rotation, water in impeller flies out from impeller under the effect of centrifugal force, vacuum appears in impeller, the water of solid-liquid separation tank 9 clear water sections enters impeller from the impeller input under hydraulic pressure and atmospheric effect, and enter in water pipeline from the water that impeller flies out, in water pipeline, hydraulic pressure increases, and the one way stop peturn valve of pipeline output is opened, water is expelled to the Protein Separation pond in the pipeline, completes like this and send continuously water.And impeller is not when working, and the hydraulic pressure in water pipeline no longer increases, and one way stop peturn valve is closed, and prevents that the water in the second filter tank from refluxing.

As shown in Figure 7, according to another embodiment of the present invention, described blade wheel chamber 34 is arranged on water pipeline 33 outputs, and the lower end of blade wheel chamber 34 is input, and the upper end of blade wheel chamber 34 is output, and the lower end of blade wheel chamber 34 is connected with the output of water pipeline 33.When wheel rotation, the water in impeller flies out from impeller under the effect of centrifugal force, enters in the second filter tank, occurs vacuum in impeller, and under hydraulic pressure and atmospheric effect, the water in the first filter tank enters impeller by water pipeline, completes like this and send continuously water.This apopore is provided with a hand pulling type gate valve 38, when needs discharge water, gate valve is opened, and gate valve is closed when not needing to discharge water.

Claims (9)

1. centralized constant indoor temperature recirculation system, comprise two culturing pools that are arranged side by side that are located under constant temperature, this culturing pool is provided with water inlet and water side, aerator and surge machine are set in this culturing pool, these two culturing pools adopt the plastic cloth film to surround, it is characterized in that arranging between two culturing pools a cover sewage disposal system, water side at these two culturing pools is provided with sewage suction device, this sewage suction device is connected with sewage disposal system by sewage conduct, and the delivery port of this sewage disposal system is communicated with culturing pool.
2. recirculation system as claimed in claim 1, it is characterized in that this sewage disposal system comprises solid-liquid separation tank, this solid-liquid separation tank is provided with sewage inlet segment and clear water water exit end, between this sewage inlet segment and clear water water exit end, solid-liquid separating machine is set, the clear water water exit end is communicated with the water inlet of two culturing pools successively with after Protein Separation pond, biofiltration device are connected with the ultraviolet sterilization battle array.
3. recirculation system as claimed in claim 2, the clear water water exit end that it is characterized in that solid-liquid separation tank are provided with pumping plant and are communicated with the Protein Separation pond.
4. recirculation system as claimed in claim 3, is characterized in that pumping plant comprises a water pipeline, and an end of this water pipeline is provided with a blade wheel chamber, is provided with impeller in this blade wheel chamber, and the central shaft of this impeller is connected with drive motors.
5. recirculation system as claimed in claim 1, the bottom that it is characterized in that this culturing pool is the inclined-plane, and the inclination angle on inclined-plane is 30 ~ 35 degree, and water inlet is positioned at the upper end on inclined-plane, the water side is positioned at the lower end on inclined-plane, and the difference in height of this water inlet and water side is 3.2 ~ 3.8m.
6. recirculation system as claimed in claim 1, is characterized in that being arranged side by side two aerators near water inlet, and the discharge directions of aerator is arranging surge machine towards the water side near the water side.
7. recirculation system as claimed in claim 1, it is characterized in that this sewage suction device comprises the chassis, the chassis is provided with an interpolation pipe, this interpolation pipe is covered with the soil pick-up cover, this soil pick-up cover bottom is evenly equipped with a plurality of through holes, the interpolation pipe top is provided with water inlet, and the bottom of interpolation pipe is provided with delivery port, and delivery port is successively by import elbow bend, center blow-off pipe be connected elbow bend and be connected with the water valve pipe.
8. recirculation system as claimed in claim 2, it is characterized in that biofiltration device comprises the intake chamber that be arranged in parallel, biological filter pocket and effluent trough, one end of intake chamber is provided with water inlet, the other end of effluent trough is provided with delivery port, and intake chamber and biological filter pocket sides adjacent are provided with into the water dividing plate, and this water inlet dividing plate bottom is provided with into the water notch, biological filter pocket and effluent trough sides adjacent are provided with the water outlet dividing plate, and this water outlet dividing plate upper end is provided with the water outlet notch.
9. recirculation system as claimed in claim 1 is characterized in that culturing pool is arranged in constant temperature cultivation factory building, and this constant temperature cultivation factory building top arranges the arch roof that insulation material is made.
CN201110344806.9A 2011-11-04 2011-11-04 Centralization indoor constant temperature circulation aquaculture system CN103081843B (en)

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Cited By (17)

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CN103329847A (en) * 2013-05-24 2013-10-02 句容市龙泉大鲵繁殖中心 Water circulation giant salamander culture pond equipped with feeding platform
CN103430898A (en) * 2013-08-23 2013-12-11 江苏中洋集团股份有限公司 Ecotype intensification freshwater aquaculture system
CN103548757A (en) * 2013-11-04 2014-02-05 中国水产科学研究院渔业机械仪器研究所 Substrate treating system for aquaculture pond
CN103583455A (en) * 2013-11-12 2014-02-19 常州日美水产科技有限公司 Swirling flow type screen filtering system and filtering method of swirling flow type screen filtering system
CN103651194A (en) * 2013-11-18 2014-03-26 苏州依科曼生物农业科技有限公司 Method for improving quality of aquaculture products
CN103766273A (en) * 2014-01-26 2014-05-07 广东海洋大学 Automatic sewage discharging system and automatic sewage discharging method of prawn intensive culturing pond
CN104115778A (en) * 2014-08-20 2014-10-29 青岛中科海水处理有限公司 Circulating water high-density culturing system equipment
CN104509476A (en) * 2014-12-22 2015-04-15 天津市益多利来水产养殖有限公司 Industrialized aquaculture pond
CN104686444A (en) * 2015-03-31 2015-06-10 福建省东方利洋苗种繁育有限公司 Blow-down apparatus and blow-down method for industrial aquaculture ponds
CN105325331A (en) * 2015-10-22 2016-02-17 天津丰沛水产养殖有限公司 Cold water fish closed cycle culturing temperature regulating device and method
CN105831006A (en) * 2016-05-31 2016-08-10 苏州鼎兴斯沃水产养殖设备有限公司 Water tank sewage disposal device for water tank circulating running water aquaculture systems of fish ponds
CN105850857A (en) * 2016-05-31 2016-08-17 苏州鼎兴斯沃水产养殖设备有限公司 Fishpond farming system
CN105994109A (en) * 2016-05-19 2016-10-12 莱州明波水产有限公司 Circulating water culture pond built-in processing pool
CN106234290A (en) * 2016-07-26 2016-12-21 福建省闽东水产研究所 It is applicable to the circulating water culture system of Carnis Pseudosciaenae
CN106508777A (en) * 2016-11-24 2017-03-22 防城港市畜牧站 Aquatic product transfer box convenient to clean
CN106614234A (en) * 2017-01-12 2017-05-10 深圳明创自控技术有限公司 High-efficiency energy-saving environment-friendly aquaculture system
CN107724447A (en) * 2017-09-27 2018-02-23 扬州大学 The small-sized channel cleanout in south and dirt water farmland utilization system and its application method

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CN103329847A (en) * 2013-05-24 2013-10-02 句容市龙泉大鲵繁殖中心 Water circulation giant salamander culture pond equipped with feeding platform
CN103430898A (en) * 2013-08-23 2013-12-11 江苏中洋集团股份有限公司 Ecotype intensification freshwater aquaculture system
CN103548757A (en) * 2013-11-04 2014-02-05 中国水产科学研究院渔业机械仪器研究所 Substrate treating system for aquaculture pond
CN103548757B (en) * 2013-11-04 2016-07-06 中国水产科学研究院渔业机械仪器研究所 A kind of cultivating pool substrate processes system
CN103583455A (en) * 2013-11-12 2014-02-19 常州日美水产科技有限公司 Swirling flow type screen filtering system and filtering method of swirling flow type screen filtering system
CN103583455B (en) * 2013-11-12 2015-10-28 常州日美水产科技有限公司 A kind of cyclone type screen filtration system and filter method thereof
CN103651194A (en) * 2013-11-18 2014-03-26 苏州依科曼生物农业科技有限公司 Method for improving quality of aquaculture products
CN103651194B (en) * 2013-11-18 2016-03-02 苏州依科曼生物农业科技有限公司 A kind of method improving aquaculture products quality
CN103766273B (en) * 2014-01-26 2016-01-20 广东海洋大学 The automation drainage of prawn fishing breeding pond and method
CN103766273A (en) * 2014-01-26 2014-05-07 广东海洋大学 Automatic sewage discharging system and automatic sewage discharging method of prawn intensive culturing pond
CN104115778A (en) * 2014-08-20 2014-10-29 青岛中科海水处理有限公司 Circulating water high-density culturing system equipment
CN104509476A (en) * 2014-12-22 2015-04-15 天津市益多利来水产养殖有限公司 Industrialized aquaculture pond
CN104686444A (en) * 2015-03-31 2015-06-10 福建省东方利洋苗种繁育有限公司 Blow-down apparatus and blow-down method for industrial aquaculture ponds
CN105325331A (en) * 2015-10-22 2016-02-17 天津丰沛水产养殖有限公司 Cold water fish closed cycle culturing temperature regulating device and method
CN105994109B (en) * 2016-05-19 2018-09-21 莱州明波水产有限公司 Processing pond built in circulating water cultivation pond
CN105994109A (en) * 2016-05-19 2016-10-12 莱州明波水产有限公司 Circulating water culture pond built-in processing pool
CN105850857A (en) * 2016-05-31 2016-08-17 苏州鼎兴斯沃水产养殖设备有限公司 Fishpond farming system
CN105831006A (en) * 2016-05-31 2016-08-10 苏州鼎兴斯沃水产养殖设备有限公司 Water tank sewage disposal device for water tank circulating running water aquaculture systems of fish ponds
CN105850857B (en) * 2016-05-31 2019-04-23 苏州鼎兴斯沃水产养殖设备有限公司 Breed in stew system
CN106234290A (en) * 2016-07-26 2016-12-21 福建省闽东水产研究所 It is applicable to the circulating water culture system of Carnis Pseudosciaenae
CN106508777A (en) * 2016-11-24 2017-03-22 防城港市畜牧站 Aquatic product transfer box convenient to clean
CN106614234A (en) * 2017-01-12 2017-05-10 深圳明创自控技术有限公司 High-efficiency energy-saving environment-friendly aquaculture system
CN106614234B (en) * 2017-01-12 2019-10-01 中高(泰州)知识产权管理咨询有限公司 A kind of energy-saving and environment-friendly cultivating system
CN107724447A (en) * 2017-09-27 2018-02-23 扬州大学 The small-sized channel cleanout in south and dirt water farmland utilization system and its application method

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