Hydrodynamics of recirculating aquaculture tanks with different spatial utilization

Zhang, Jun; Jia, Guangchen; Wang, Minghua; Cao, Shouqi; Mkumbuzi, Sibanda Gibson

doi:10.1016/j.aquaeng.2021.102217

Cited by 24 publications

(4 citation statements)

References 18 publications

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“…on the ow eld characteristics of a single channel square aquaculture tank by optimizing the arc angle, it was found that the relative arc width ratio set at 0.20 to 0.25 led to a better ow eld and higher space utilization. (Zhang et al, 2022a). A numerical simulation model was developed with reference to the experimental model to investigate the hydrodynamic performance of single-channel recirculating aquaculture systems with different space utilisation.…”

Section: Discussionmentioning

confidence: 99%

Field test study on the dynamic characteristics of sewage collection in circular recirculating water aquaculture tank

Wu,

Gui,

Yang

et al. 2024

Preprint

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To investigate the dynamic characteristics of sewage collection in circular circulating water aquaculture tank, this paper systematically studies the influence of flow rate Q of the jet pipe, the layout distance ratio d/r (d is the distance between the midpoint of the axis and the nearest tank wall, and r is the radius of the circular aquaculture tank), the layout angle θ, the structure of the jet pipe, etc. In the field tests, a high-definition camera was used to record the distribution of sewage in the aquaculture tank, and the distribution of the flow field in the aquaculture tank was measured by an Acoustic Doppler Current Profiler, and the distance between the sewage and the center of the tank was quantified. Meanwhile, the sewage collection effect of the aquaculture tank was evaluated by comparing the maximum distance between the sewage and the center of the tank under different working conditions. The evaluation results indicated that the formation of an effective horizontal circulation in the circular aquaculture tank is the primary condition for sewage accumulation to the center of the tank, and different flow rate of the jet pipe, the layout distance ratio d/r, the layout angle θ, and the structure of the jet pipe all affect the sewage collection effect in the tank. In the horizontal single-tube single-hole jet pipe structure mode, the best sewage collection result was obtained at the layout angle θ of 0°, the layout distance ratio of 1/4, and the layout flow rate Q of 7 L/s (hydraulic retention time is 70 minutes); when the layout flow rate Q was less than 7 L/s, the sewage gathered near the wall of the circular aquaculture tank, and the degree of feed dispersion was relatively high. In the vertical single-tube porous jet pipe structure mode, better sewage collection effect was obtained when the layout flow Q was adjusted to 7 ~ 9 L/s, the layout angle θ was set to 45°, and the layout distance ratio d/r was set to 1/4. The sewage collection performance of the aquaculture tank under the vertical single-tube porous jet pipe layout mode was obviously better than that of the horizontal single-tube single-hole jet pipe mode. Without major changes to the original structure, the research results directly and effectively guide the actual production and application to reduce the flow rate and energy consumption and improve the circular circulating water aquaculture tank of the Qinghai Lake Nude Carp Rescue Center.

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Section: Discussionmentioning

confidence: 99%

Field test study on the dynamic characteristics of sewage collection in circular recirculating water aquaculture tank

Wu,

Gui,

Yang

et al. 2024

Preprint

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“…In their study, the inlet diameter ratio of the aquaculture tank (parameter C/B, where C is the horizontal distance from the jet hole location to the aquaculture tank, and B is the side length of the short side of the aquaculture tank) was set from 0.02 to 0.04 to facilitate the best flow field conditions for the aquaculture tank system with a square round-tangent angle. In the study conducted by Gui, J. et al (Gui et al, 2020) on the flow field characteristics of a single channel square aquaculture tank by optimizing the arc angle, it was found that the relative arc width ratio set at 0.20 to 0.25 led to a better flow field and higher space utilization (Zhang et al, 2022b). A numerical simulation model was developed with reference to the experimental model to investigate the hydrodynamic performance of single-channel recirculating aquaculture systems with varying space utilization.…”

Section: Discussionmentioning

confidence: 99%

“…The distribution of flow patterns and the aggregation of dirt in the aquaculture tank directly affect the growth environment of aquaculture objects (López-Rebollar et al, 2023;López-Rebollar et al, 2021), and hydrodynamic drive equipment should be reasonably utilized to collect the dirt directly to the outlet relying on the annular flow pattern formed by the self-cleaning ability of the aquaculture tank. Currently, scholars at home and abroad mainly carry out related research by adopting the physical test method and numerical simulation method (Labatut et al, 2015)for hydrodynamic characteristics, particulate exclusion rate (Goula et al, 2008;Zhang et al, 2024), tank structure (Zhang et al, 2022a), inlet and outlet configurations (Bajcar et al, 2011;Davidson and Summerfelt, 2004a), etc. aiming to improve the self-cleaning efficiency of aquaculture tanks.…”

Section: Introductionmentioning

confidence: 99%

Field study on the dynamic characteristics of sewage collection in a circular aquaculture tank

Wu,

Gui,

Yang

et al. 2024

Preprint

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To solve the problem of low performance in sewage collection of the circular aquaculture tank, this paper systematically studies the influence of flow rate Q of the jet pipe, the deployment distance ratio d/r (d is the distance between the midpoint of the axis and the nearest tank wall, and r is the radius of the circular aquaculture tank), the deployment angle θ, and the structure of the jet pipe on the dynamic characteristics of sewage collection. In the field study, a high-definition camera was used to record the distribution of sewage, the distribution of the flow field in the aquaculture tank was measured by the Acoustic Doppler Velocimetry. Thus, the distance between the sewage and the center of the tank was quantified. Meanwhile, the sewage collection performance of the aquaculture tank was evaluated by comparing the maximum distance between the sewage and the center of the tank under different working conditions. The results indicated that the formation of an effective horizontal circulation in the circular aquaculture tank is the primary condition for sewage accumulation to the center of the tank, and different flow rate Q of the jet pipe, the deployment distance ratio d/r, the deployment angle θ, and the structure of the jet pipe all can affect the sewage collection effect in the tank. In the horizontal single-pipe single-hole jet pipe structure mode, the best sewage collection result was obtained at the deployment angle θ of 0°, the deployment distance ratio of 1/4, and the deployment flow rate Q of 7 L/s; when the deployment flow rate Q was less than 7 L/s, the sewage accumulated near the tank wall, and the sewage particle dispersion was relatively high. In the vertical single-pipe porous jet pipe structure mode, better sewage collection performance was obtained when the deployment flow Q was adjusted to 7 ~ 9 L/s, the deployment angle θ was set to 45°, and the deployment distance ratio d/r was set to 1/4. The sewage collection performance of the aquaculture tank under the vertical single-pipe porous jet pipe deployment mode was obviously better than that of the horizontal single-pipe single-hole jet pipe mode. The results can directly and effectively guide the inlet design of such kind aquaculture tanks to reduce the flow rate and energy consumption and improve sewage collection performance.

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“…Aquaponics systems combine the benefits of aquaculture and hydroponics, using fish feed waste and fish manure as a source of nutrients for plant/vegetable growth rather than simply throwing them away [14]- [16]. Leftover feed and fish manure become valuable products rather than mere waste [2].…”

Section: Article History: Acceptedmentioning

confidence: 99%

Providing Aquaponics Facility to the Kali Code Area of Yogyakarta to Support Food Availability for the Local Community

Putra¹,

Nugroho²,

Shiddiqie³

et al. 2022

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The community service program in the form of providing aquaponics facilities in the Kali Code area of Yogyakarta was implemented to support food availability in the community during the COVID 19 pandemic. This aquaponics facility is also expected to contribute to the development of the Kali Code region as an ecotourism area and an example of sustainable riverbank management. The water source used for the facility comes from the outlet of a wastewater treatment system that treats wastewater from several food stalls around the site. This is very beneficial in terms of conserving clean water resources as this aquaponics facility does not require a separate clean water supply. Several phases carried out in this program include the design, manufacture, and installation of aquaponics facilities. This program is also a means for students to explore ideas and use the skills they acquire during their studies to solve problems faced by the community. An example of how the program contributes to feeding the community is produced fish and vegetables are being used to support the consumption of the river school’s closing event at that location.

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Hydrodynamics of recirculating aquaculture tanks with different spatial utilization

Cited by 24 publications

References 18 publications

Field test study on the dynamic characteristics of sewage collection in circular recirculating water aquaculture tank

Field test study on the dynamic characteristics of sewage collection in circular recirculating water aquaculture tank

Field study on the dynamic characteristics of sewage collection in a circular aquaculture tank

Providing Aquaponics Facility to the Kali Code Area of Yogyakarta to Support Food Availability for the Local Community

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