NL2029700B1 - Device and method for removing sewage and preventing escape of live shrimps from recirculating aquaculture system - Google Patents

Device and method for removing sewage and preventing escape of live shrimps from recirculating aquaculture system Download PDF

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Publication number
NL2029700B1
NL2029700B1 NL2029700A NL2029700A NL2029700B1 NL 2029700 B1 NL2029700 B1 NL 2029700B1 NL 2029700 A NL2029700 A NL 2029700A NL 2029700 A NL2029700 A NL 2029700A NL 2029700 B1 NL2029700 B1 NL 2029700B1
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escape
pipe
water return
water
live
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NL2029700A
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Dutch (nl)
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Qiu Tianlong
Wu Bin
Zhou Li
Du Yishuai
Sun Jianming
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Inst Oceanology Cas
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/50—Culture of aquatic animals of shellfish
    • A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Farming Of Fish And Shellfish (AREA)

Abstract

A device and a method for removing sewage and preventing escape of live shrimps from a recirculating aquaculture system. A bottom sewage collection pipe is placed at 5 the bottom of a culture pond, a sewage collection port is formed in the bottom sewage collection pipe. A live shrimp anti-escape frame is arranged in a water return and sewage discharge groove. An anti-escape net is arranged in the live shrimp anti-escape frame. One end of the bottom sewage collection pipe is closed, and the other end of the bottom sewage collection pipe is communicated with the interior of the anti-escape net through 10 a water return pipe. One end of a water level adjustment pipe is inserted into the water return and sewage discharge groove, and is located outside the live shrimp anti-escape frame. The other end of the water level adjustment pipe is connected to a water return pipeline of the recirculating aquaculture system through a lower water return pipe. Water level adjustment is realized through the height, inserted into the water return and sewage 15 discharge groove, of the water level adjustment pipe. The device is not only beneficial to observing the situations of removal of the sewage and escape of the live shrimp, but also can clean or replace the anti-escape net periodically to prevent the anti-escape net from being blocked to affect the circulating of the circulating-water-utilization system. The device effectively solves the problem of removal of the sewage in a circulating- 20 water-utilization shrimp culture process, can effectively prevent escape of the live shrimps, and facilitates the separation of the dead shrimps and the live shrimps.

Description

DEVICE AND METHOD FOR REMOVING SEWAGE AND PREVENTING
ESCAPE OF LIVE SHRIMPS FROM RECIRCULATING AQUACULTURE
SYSTEM
TECHNICAL FIELD
[01] The present disclosure belongs to the field of aquaculture engineering, and particularly, relates to a device and a method for removing sewage and preventing escape of live shrimps from a recirculating aquaculture system.
BACKGROUND ART
[02] In an industrial recirculating aquaculture system, how to discharge sewage, such as shrimp shells, dead shrimps, residual bait, and feces, in a culture water body out of the system, and prevent escape of live shrimps is a key technology, and is also a key link to determine whether the circulating-water-utilization shrimp culture can be successful 1S or not.
[03] Chinese utility model patent which is disclosed on July 30, 2013 and has the
Publication Number of CN203735271U discloses a floating ball type sewage discharger for a raised shrimp pond. This device is suitable for the raised shrimp culture pond, but is not suitable for a recirculating aquaculture system. Chinese utility model patent which is disclosed on October 7, 2015 and has the Publication Number of CN204682166U discloses an anti-escape device at a central sewage discharge opening of a shrimp culture pond. This device is arranged below a culture water body and above the sewage discharge opening, which can effectively prevent shrimps from escaping. However, an anti-escape net is easily blocked by shrimp shells and sewage. In addition, the shrimp shells cannot be discharged out of the culture water body. Chinese invention patent which is disclosed on July 6, 2016 and has the Publication Number of CN105724307A discloses an air lifting type decontamination device suitable for indoor industrial culture.
This device is expected to disturb live shrimps to leave a sewage discharge opening by producing air bubbles to prevent the live shrimps from being affected, and meanwhile,
quickly remove dead shrimps, residual bait, and feces from a shrimp pond by lifting the sewage discharging opening via air. However, there are the following disadvantages that: a sewage discharge sleeve and a base plate of the device both are arranged at the bottom of a culture water body; the removal of the dead shrimps, residual bait, and feces is not easily observed; and the removal of live shrimps can also not be detected. So, the loss of shrimp seeds is caused and the load of a subsequent sewage discharge device, such as a micro-filter, is increased. Therefore, the research and development of a device which is more suitable for removing shrimp shells, dead shrimps, and sewage in the circulating—water-utilization culture and can also prevent the live shrimps from escaping are of important significance for promoting high-density shrimp culture in circulating water.
SUMMARY
[04] In order to solve the above-mentioned problems and meets requirements of the circulating-water-utilization shrimp culture, an objective of the embodiments is to provide a device and a method for removing sewage and preventing escape of live shrimps from a recirculating aquaculture system.
[05] The objective of the embodiments is implemented by the following technical solutions.
[06] The device of the present disclosure includes a bottom sewage collection pipe, a water return pipe, a water return and sewage discharge groove, a live shrimp anti- escape frame, an anti-escape net, and a water level adjustment pipe. The bottom sewage collection pipe is placed at a bottom of a culture pond. A sewage collection port is formed in the bottom sewage collection pipe. The live shrimp anti-escape frame is arranged in a water return and sewage discharge groove. The anti-escape net is mounted in the live shrimp anti-escape frame. One end of the bottom sewage collection pipe is closed, and an other end of the bottom sewage collection pipe is communicated with the interior of the anti-escape net through the water return pipe. One end of a water level adjustment pipe is inserted into the water return and sewage discharge groove, and is located outside the live shrimp anti-escape frame. An other end of the water level adjustment pipe is connected to a water return pipeline of the recirculating aquaculture system through a lower water return pipe. Water level is adjusted realized through a height of the water level adjustment pipe inserted into the water return and sewage discharge groove.
[07] The water return and sewage discharge groove, the live shrimp anti-escape frame, and the anti-escape net may be all arranged on a water body surface layer of the culture pond.
[08] The water return pipe between the bottom sewage collection pipe and the water return and sewage discharge groove may include a middle water return pipe and an upper water return pipe. One end of the middle water return pipe may be connected to the other end of the bottom sewage collection pipe through a bottom elbow. An other end of the middle water return pipe may be connected to one end of the upper water return pipe through an upper elbow, and an other end of the upper water return pipe may be inserted into the anti-escape net.
[09] The live shrimp anti-escape frame may be of a hollow structure and may be fixedly connected to an interior of the water return and sewage discharge groove. A an interface through which the water return pipe passes may be formed in a bottom of the live shrimp anti-escape frame.
[10] The anti-escape net may be detachably mounted in the live shrimp anti-escape frame. The anti-escape net may be made of a nylon or plastic material.
[11] A seal head may be arranged on one end of the bottom sewage collection pipe.
The sewage collection port may be formed in a bottom of the bottom sewage collection pipe.
[12] A method for removing sewage and preventing escape of live shrimps from a recirculating aquaculture system of the present disclosure is that: enabling culture water, sewage, and live shrimps to enter the bottom sewage collection pipe from a sewage collection port, and to enter the anti-escape net through a water return pipe; enabling the sewage flow out from holes of the anti-escape net and a live shrimp anti-escape frame, and to enter the lower water return pipe through the water level adjustment pipe,
so as to flow into a water return pipeline of the recirculating aquaculture system; filtering live shrimps, and shrimp shells and dead shrimps in the sewage by the anti-escape net and the live shrimp anti-escape frame, to intercept the live shrimp, and the shrimp shells and the dead shrimps in the sewage in the live shrimp anti-escape frame; removing the
S shrimp shells and the dead shrimps; and replacing the live shrimps back into the culture pond again.
[13] Enabling a water level difference to be between an inside and an outside of the water return and sewage discharge groove. Entering the sewage and the live shrimps into the water return and sewage discharge groove as culture water flows due to the water level difference, so as to discharge the sewage and separate the live shrimps and the dead shrimps.
[14] After removing the water level adjustment pipe, increasing the water level difference between the inside and the outside of the water return and sewage discharge groove. Changing a pressure at the sewage collection port by the water level difference after being increased to form a negative pressure, such that the sewage close to or further away from the sewage collection port enters the bottom sewage collection pipe.
[15] The embodiments have the following positive effects:
[16] 1. The device of the embodiments overcomes the defect that the anti-escape net is easily blocked when the anti-escape net is arranged at a water return pipe or a water return disc at the bottom. The water return and sewage discharge groove, the live shrimp anti-escape frame, and the anti-escape net are all arranged on a water body surface layer of the culture pond, which facilitates observing the removal situation of the shrimp shells, the dead shrimps, residual bait, and feces. Meanwhile, the shrimp shells, the dead shrimps, and the live shrimps are intercepted in the live shrimp anti-escape net, so as to facilitate manual separation.
[17] 2. The anti-escape net in the device of the embodiments is fixed to the live shrimp anti-escape frame, and anti-escape nets of different hole sizes can be replaced according to the sizes of the shrimp shells and the shrimp, so as to achieve objectives of facilitating sewage discharge and intercepting the dead shrimps and live shrimps. This design is flexible, and the practical.
[18] 3. The embodiments can be used in combination with an intermittent water return device to improve the sewage discharge efficiency. 5 BRIEF DESCRIPTION OF THE DRAWINGS
[19] FIG. 1 is an overall structural diagram of a device for removing sewage and preventing escape of live shrimps from a recirculating aquaculture system of the present disclosure;
[20] FIG. 2 is atop view of FIG. 1; and
[21] FIG. 3 is a partially enlarged view of a live shrimp anti-escape frame and an anti-escape net of the device for removing sewage and preventing escape of live shrimps from a recirculating aquaculture system of the present disclosure.
[22] Reference signs in drawings: 1 seal head, 2 bottom sewage collection pipe, 3 bottom elbow, 4 middle water return pipe, 5 upper elbow, 6 upper water return pipe, 7 water return and sewage discharge groove, 8 live shrimp anti-escape frame, 9 anti-escape net, 10 water level adjustment pipe, 11 lower water return pipe, 12 sewage collection port, and 13 culture pond wall.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[23] The present disclosure will be further described below with reference to accompanying drawings.
[24] As shown in FIGs. 1-3, a device for removing sewage and preventing escape of live shrimps from a recirculating aquaculture system of the present disclosure includes a bottom sewage collection pipe 2, a water return pipe, a water return and sewage discharge groove 7, a live shrimp anti-escape frame 8, an anti-escape net 9, and a water level adjustment pipe 10. The bottom sewage collection pipe 2 is placed at the bottom of a culture pond. A sewage collection port 12 is formed in the bottom sewage collection pipe 2. The water return and sewage discharge groove 7, the live shrimp anti-escape frame 8, and the anti-escape net 9 are all arranged on a water body surface layer of the culture pond. The live shrimp anti-escape frame 8 is arranged in the water return and sewage discharge groove 7. The anti-escape net 9 is mounted in the live shrimp anti- escape frame 8. The live shrimp anti-escape frame 8 of the present disclosure is of a hollow structure and is fixedly connected to the interior of the water return and sewage discharge groove 7. An interface through which the water return pipe passes is formed in the bottom of the live shrimp anti-escape frame 8. The anti-escape net 9 of the present disclosure is detachably mounted in the live shrimp anti-escape frame 8, i.e, anti-escape nets with different hole sizes may be replaced according to the sizes of the shrimp shells and culture shrimps, so as to achieve the objectives of facilitating sewage discharge and intercepting dead shrimps and live shrimps. The anti-escape net 9 of the present disclosure may be made of a nylon or plastic material.
[25] One end of the bottom sewage collection pipe 2 is provided with a seal head and is a closed end. The other end of the bottom sewage collection pipe 2 is communicated with the interior of the anti-escape net 9 through the water return pipe. One end of the water level adjustment pipe 10 is inserted into the water return and sewage discharge groove 7, and is located outside the live shrimp anti-escape frame 8. The other end of the water level adjustment pipe 10 is connected to one end of the lower water return pipe 11. The other end of the lower water return pipe 11 passes through a culture pond wall 13 to connect a water return pipeline of the recirculating aquaculture system. Water level is adjusted through a height of the water level adjustment pipe 10 inserted into the water return and sewage discharge groove 7. The water return pipe between the bottom sewage collection pipe 2 and the water return and sewage discharge groove 7 of the present disclosure includes a middle water return pipe 4 and an upper water return pipe 6. One end of the middle water return pipe 4 is connected to the other end of the bottom sewage collection pipe 2 through a bottom elbow 3. The other end of the middle water return pipe 4 is connected to one end of the upper water return pipe 6 through an upper elbow 5, and the other end of the upper water return pipe 6 is inserted into the anti-escape net 9.
[26] The seal head 1, the bottom sewage collection pipe 2, the bottom elbow 3, the middle water return pipe 4, the upper elbow 5, and the upper water return pipe 6 of the present disclosure form a bottom sewage collection device. The water return and sewage discharge groove 7, the live shrimp anti-escape frame 8, and the anti-escape net 9 form a device for removing shrimp shells, dead shrimps, and sewage and preventing escape of the live shrimps. The water level adjustment pipe 10 and the lower water return pipe 11 form a water level adjustment device.
[27] A method for removing sewage and preventing escape of live shrimps from a recirculating aquaculture system of the present disclosure is that:
[28] In daily circulating-water-utilization culture, culture water, live shrimps, and sewage, such as shrimp shells, dead shrimps, residual bait, and feces, enter the bottom sewage collection pipe 2 from the sewage collection port 12; and then enter the anti- escape net 9 through the bottom elbow 3, the middle water return pipe 4, the upper elbow 5, and the upper water return pipe 6. The culture water and the sewage, such as the residual bait and the feces, flow out from holes of the anti-escape net 9 and the live shrimp anti-escape frame 8, and enter the lower water return pipe 11 through the water level adjustment pipe 10, so as to flow into a water return pipeline of the recirculating aquaculture system. The live shrimps, the shrimp shells, and the dead shrimps are filtered by the anti-escape net 9 and the live shrimp anti-escape basket 8 and are intercepted in the live shrimp anti-escape basket 8. The shrimp shells and the dead shrimps are removed out from the device manually, and the live shrimps are replaced into the culture pond again. The water level difference between the inside and the outside of the water return and pollutant discharge groove 7 is generally adjusted to 3 to 5 cm according to the height of the water level adjustment pipe 10. The water level difference can enable the sewage, such as the shrimp shells, the dead shrimps, part live shrimps, residual bait, and feces, enter the water return and sewage discharge groove 7 as culture water flows, so as to achieve the objectives of discharging the sewage and separating the live shrimps from dead shrimps. After the water level adjustment pipe 10 is removed, the water level difference between the inside and the outside of the water return and sewage discharge groove 7 can reach 20 cm instantaneously. The pressure at the sewage collection port 12 can be changed by the high water level difference after being increased to form a negative pressure, such that the sewage, such as the shrimp shells, the dead shrimps, the residual bait, and the feces, close to or further away from the sewage collection port 12 enter the bottom sewage collection pipe 2, thereby improving the sewage discharge efficiency.
[29] The device of the present disclosure is tested in a circulating-water-utilization culture system for Litopenaeus vannamei in Dalian, Liaoning Province, which is applied to two sets of circulating-water-utilization systems. The total culture water body is 676 m’. In the overall circulating-water-utilization culture process, the device can effectively remove the sewage, such as the shrimp shells, the dead shrimps, the residual bait, and the feces, can effectively prevent escape of the live shrimps, and can also facilitate the separation of the dead shrimps and the live shrimps manually.
[30] The present disclosure is suitable for various shapes of culture ponds in existing industrial circulating-water-utilization culture systems, and particularly solves the problems that the shrimp shells, the dead shrimps, and the sewage in a square pond are difficult to remove. By using the present disclosure, it is possible to effectively solve the problem of removing the shrimp shells and the sewage in a circulating-water-utilization shrimp culture process, and effectively prevent escape of the live shrimps, thereby facilitating the separation of the live shrimps and the dead shrimps.

Claims (9)

Conclusies L Inrichting voor het verwijderen van afvalwater en het voorkomen van ontsnapping van levende garnalen uit een recirculerend aquacultuursysteem, waarbij de inrichting het volgende omvat: een bodemafvalwaterverzamelingspijp (2), waarbij de bodemafvalwaterverzamelingspijp (2) geplaatst is bij een bodem van een kweekvijver, waarbij een bodemafvalwaterverzamelingspoort (12) in de bodemafvalwaterverzamelingspijp (2) is gevormd; een waterretourpijp; een waterretour- en afvalwaterafvoergroef (7); een anti-ontsnapframe (8) voor levende garnalen, waarbij het anti-ontsnapframe (8) voor levende garnalen is gerangschikt in de waterretour- en afvalwaterafvoergroef (7), een anti-ontsnapnet (9), waarbij het anti-ontsnapnet (9) gemonteerd is in het anti- ontsnapframe (8) voor levende garnalen, waarbij één eind van de bodemafvalwaterverzamelingspijp (2) gesloten is en waarbij een ander eind van de bodemafvalwaterverzamelingspijp (2) communiceert met een binnenruimte van het anti- ontsnapnet (9) via de waterretourpijp; en een waterniveau-aanpassingspijp (10), waarbij één eind van de waterniveau- aanpassingspijp (10) in de waterretour- en afvalwaterafvoergroef (7) gestoken is en buiten het anti-ontsnapframe (8) voor levende garnalen is geplaatst, waarbij een ander eind van de waterniveau-aanpassingspijp (10) verbonden is met een waterretourpijpleiding van het recirculerend aquacultuursysteem via een lagergelegen waterretourpijp (11), en waarbij waterniveau aangepast wordt door een hoogte van de waterniveau-aanpassingspijp (10) die in de waterretour- en afvalwaterafvoergroef (7) is gestoken.Claims L Device for removing wastewater and preventing live shrimp escape from a recirculating aquaculture system, the device comprising: a bottom sewage collection pipe (2), the bottom sewage collection pipe (2) being located at a bottom of a breeding pond, wherein a bottom sewage collection port (12) is formed in the bottom sewage collection pipe (2); a water return pipe; a water return and waste water discharge groove (7); a live shrimp anti-escape frame (8), with the live shrimp anti-escape frame (8) arranged in the water return and wastewater discharge groove (7), an anti-escape net (9), with the anti-escape net (9) mounted in the anti-escape frame (8) for live shrimp, with one end of the bottom sewage collecting pipe (2) closed and another end of the bottom sewage collecting pipe (2) communicating with an inner space of the anti-escape net (9) through the water return pipe; and a water level adjustment pipe (10), with one end of the water level adjustment pipe (10) inserted into the water return and waste water discharge groove (7) and placed outside the live shrimp anti-escape frame (8), with another end of the water level adjustment pipe (10) is connected to a water return pipeline of the recirculating aquaculture system through a lower water return pipe (11), and water level is adjusted by a height of the water level adjustment pipe (10) installed in the water return and waste water discharge groove (7 ) has been inserted. 2. Inrichting voor het verwijderen van afvalwater en het voorkomen van ontsnapping van levende garnalen uit een recirculerend aquacultuursysteem volgens conclusie 1, waarbij de waterretour- en afvalwaterafvoergroef (7), het anti-ontsnapframe (8) voor levende garnalen en het anti-ontsnapnet (9) alle zijn gerangschikt op een oppervlakslaag van het waterlichaam van de kweekvijver.The device for removing sewage and preventing escape of live shrimp from a recirculating aquaculture system according to claim 1, wherein the water return and wastewater discharge groove (7), the live shrimp anti-escape frame (8) and the anti-escape net ( 9) all are arranged on a surface layer of the breeding pond water body. 3. Inrichting voor het verwijderen van afvalwater en het voorkomen van ontsnapping van levende garnalen uit een recirculerend aquacultuursysteem volgens conclusie 1, waarbij de waterretourpijp, tussen de bodemafvalwaterverzamelingspijp (2) en de waterretour- en afvalwaterafvoergroef (7), een middelste waterretourpijp (4) en een boven-waterretourpijp (6) omvat; waarbij één eind van de middelste waterretourpijp (4) verbonden is met het andere eind van de bodemafvalwaterverzamelingspijp (2) door een bodemelleboog (3); waarbij een ander eind van de middelste waterretourpijp (4) verbonden is met één eind van de boven-waterretourpijp (6) door een boven-elleboog (5); en waarbij een ander eind van de boven-waterretourpijp (6) in het anti-ontsnapnet (9) gestoken is.The device for removing sewage and preventing escape of live shrimp from a recirculating aquaculture system according to claim 1, wherein the water return pipe, between the bottom sewage collection pipe (2) and the water return and sewage discharge groove (7), has a middle water return pipe (4) and comprises an above water return pipe (6); one end of the middle water return pipe (4) is connected to the other end of the bottom sewage collecting pipe (2) by a bottom elbow (3); another end of the middle water return pipe (4) is connected to one end of the upper water return pipe (6) by an upper elbow (5); and wherein another end of the overwater return pipe (6) is inserted into the anti-escape net (9). 4. Inrichting voor het verwijderen van afvalwater en het voorkomen van ontsnapping van levende garnalen uit een recirculerend aquacultuursysteem volgens conclusie 1, waarbij het anti-ontsnapframe (8) voor levende garnalen een holle structuur heeft en vast verbonden is met een binnenruimte van de waterretour- en afvalwaterafvoergroef (7), en waarbij een interface waardoorheen de waterretourpijp gaat gevormd is in een onderkant van het anti-ontsnapframe (8) voor levende garnalen.The device for removing waste water and preventing escape of live shrimp from a recirculating aquaculture system according to claim 1, wherein the live shrimp anti-escape frame (8) has a hollow structure and is fixedly connected to an inner space of the water return means. and sewage discharge groove (7), and an interface through which the water return pipe passes is formed in a bottom of the live shrimp anti-escape frame (8). 5. Inrichting voor het verwijderen van afvalwater en het voorkomen van ontsnapping van levende garnalen uit een recirculerend aquacultuursysteem volgens conclusie 1, waarbij het anti-ontsnapnet (9) losneembaar gemonteerd is in het anti- ontsnapframe (8) voor levende garnalen, en waarbij het anti-ontsnapnet (9) gemaakt is van een nylon of plastic materiaal.The device for removing sewage and preventing the escape of live shrimp from a recirculating aquaculture system according to claim 1, wherein the anti-escape net (9) is releasably mounted in the anti-escape frame (8) for live shrimp, and wherein the anti-breakaway net (9) is made of a nylon or plastic material. 6. Inrichting voor het verwijderen van afvalwater en het voorkomen van ontsnapping van levende garnalen uit een recirculerend aquacultuursysteem volgens conclusie 1, waarbij een afdichtingskop (1) is gerangschikt bij één eind van de bodemafvalwaterverzamelingspijp (2); en waarbij de bodemafvalwaterverzamelingspoort (12) gevormd is in een onderkant van de bodemafvalwaterverzamelingspijp (2).The apparatus for removing sewage and preventing escape of live shrimp from a recirculating aquaculture system according to claim 1, wherein a sealing head (1) is arranged at one end of the bottom sewage collecting pipe (2); and wherein the bottom sewage collecting port (12) is formed in a bottom of the bottom sewage collecting pipe (2). 7. Werkwijze voor het verwijderen van afvalwater en het voorkomen van7. Method of waste water removal and prevention S11 - ontsnapping van levende garnalen uit een recirculerend aquacultuursysteem volgens een van conclusies 1 - 6, waarbij de werkwijze het volgende omvat: het ertoe aanzetten van kweekwater, afvalwater en levende garnalen om de bodemafvalwaterverzamelingspijp (2) in te gaan vanuit de bodemafvalwaterverzamelingspoort (12) en om het anti-ontsnapnet (9) in te gaan via de waterretourpijp; het mogelijk maken dat het afvalwater uit de gaten van het anti- ontsnapnet (9) en een anti-ontsnapframe (8) voor levende garnalen stroomt en de onderste waterretourpijp (11) in gaat via de waterniveau-aanpassingspijp (10) om in een waterretourpijp van het recirculerend aquacultuursysteem te stromen; het filteren van levende garnalen, en garnaalschelpen en dode garnalen 1n het afvalwater middels het anti-ontsnapnet (9) en het anti-ontsnapframe (8) voor levende garnalen om de levende garnalen, en de garnaalschelpen en de dode garnalen in het afvalwater te onderscheppen in het anti-ontsnapframe (8) voor levende garnalen; het verwijderen van de garnaalschelpen en de dode garnalen; en het weer terug in de kweekvijver plaatsen van de levende garnalen .S11 - live shrimp escape from a recirculating aquaculture system according to any one of claims 1 - 6, the method comprising: inducing culture water, wastewater and live shrimp to enter the bottom sewage collection pipe (2) from the bottom sewage collection port (12) and to enter the anti-escape net (9) through the water return pipe; allowing the waste water to flow out of the holes of the anti-escape net (9) and an anti-escape frame (8) for live shrimp and enter the lower water return pipe (11) through the water level adjustment pipe (10) to become a water return pipe flow from the recirculating aquaculture system; filtering live shrimps, shrimp shells and dead shrimps in the wastewater by the anti-escape net (9) and the live shrimp anti-escape frame (8) to intercept the live shrimps, shrimp shells and dead shrimps in the wastewater in the live shrimp anti-escape frame (8); removing the shrimp shells and dead shrimp; and putting the live shrimp back into the breeding pond. 8. Werkwijze volgens conclusie 7, met het ertoe aanzetten dat er een waterniveauverschil is tussen een binnenkant en een buitenkant van de waterretour- en afvalwaterafvoergroef (7); het de in waterretour- en afvalwaterafvoergroef (7) doen ingaan van het afvalwater en de levende garnalen bij het stromen van kweekwater vanwege het waterniveauverschil, om zo het afvalwater te af te voeren en de levende garnalen en de dode garnalen te scheiden.A method according to claim 7, including causing a water level difference between an inside and an outside of the water return and waste water discharge groove (7); making the waste water and live shrimp enter the water return and waste water discharge groove (7) in the flow of breeding water due to the water level difference, so as to discharge the waste water and separate the live shrimp and the dead shrimp. 9. Werkwijze volgens conclusie 7, waarbij na verwijderen van de waterniveau- aanpassingspijp (10), het waterniveauverschil toeneemt tussen de binnenkant en de buitenkant van de waterretour- en afvalwateruitlaatgroef (7); een druk bij de bodemafvalwaterverzamelingspoort (12) veranderend middels het waterniveauverschil nadat dit is toegenomen om een negatieve druk te vormen, zodanig dat het afvalwater dichtbij of verder weg van de bodemafvalwaterverzamelingspoort (12) de bodemafvalwaterverzamelingspijp (2) ingaat.The method according to claim 7, wherein after removing the water level adjustment pipe (10), the water level difference increases between the inside and the outside of the water return and waste water outlet groove (7); a pressure at the bottom sewage collection port (12) changing by means of the water level difference after it has increased to form a negative pressure, such that the sewage enters the bottom sewage collection pipe (2) close to or further away from the bottom sewage collection port (12).
NL2029700A 2021-11-10 2021-11-10 Device and method for removing sewage and preventing escape of live shrimps from recirculating aquaculture system NL2029700B1 (en)

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