Nutrient Retention by Fish in a Multispecies Recirculating Aquaculture Facility

Summerfelt, Robert C.; Penne, Christopher R.

doi:10.21061/ijra.v8i1.1417

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…A comprehensive performance index is proposed, which can effectively evaluate the space utilisation and hydrodynamic characteristics of different culture tanks. The results show that:the turbulence intensity of the ow eld gradually decreases as the radius of the tank llet increases, (Gorle et al, 2020;Summerfelt et al, 2000) used CFD to simulate the effects of the tank geometry and tank inlet and outlet structure on the particle ushing and hydraulic mixing performance of the aquaculture tank. In actual production and physical model tests, θ = 0°, θ = 20°, and 45° are the three most common inlet angles that lead to a good sewage collection effect in the circular recirculating water aquaculture tank, and this study focuses on these three angles.…”

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

View full text Add to dashboard Cite

show abstract

“…Summerfelt . et al (Summerfelt et al, 2000) and Gorle et al (Gorle et al, 2020) employed CFD to simulate the effects of the tank geometry and tank inlet and outlet structure on the particle flushing and hydraulic mixing performance of the aquaculture tank. In actual production and physical model tests, θ=0°, θ=20°, and 45° were the three most common inlet angles that led to a good sewage collection effect in the circular recirculating aquaculture tank, and this study focused on these three angles.…”

Section: Discussionmentioning

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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“…According to Summerfelt and Penne (2007) the nutrient accretion in different sh species is primarily dependent on the level of dietary nutrient composition and other associated biological factors. In the current study, whole-body proximate composition of experimental shes in terms of total ash, calcium and phosphorous content was in uenced by the reduction in the level of inclusion of FM content of the diet and thus the lower values were observed in FM free diet fed shes (100CSM).…”

Section: Discussionmentioning

confidence: 99%

Enzymological, Histological and Serum Biomarkers Responses of Snubnose Pompano on Complete Replacement of Fishmeal Using Cottonseed Meal Supplemented With Lysine and Methionine in the Diet

Prabu

Vijayagopal

Ebeneezar

et al. 2021

Preprint

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In a feeding experiment, cottonseed meal (CSM) was used to replace fishmeal (FM) in the diet of snubnose pompano supplemented with lysine and methionine to assess the growth, nutritive profile, hematological, histological and stress biomarkers response. Experimental fishes were randomly stocked in five treatments each with triplicates. Five isonitrogenous and isolipidic diets with graded level of CSM (0, 8.7, 17.4, 26.0 and 34.7%) as replacement for FM protein (0, 25, 50, 75, and 100%) were formulated and fed to respective treatments. Comparison between various parameters among the treatments was made using orthogonal polynomial contrasts to indicate the statistical significance. Higher alkaline phosphatase, acid phosphatase, lactate dehydrogenase, malate dehydrogenase, aspartate and alanine aminotransferase activities were observed in 0CSM group and followed by 100CSM group as higher inclusion level of CSM with higher free gossypol content did not affect the metabolic enzyme activities. The maximum muscular free gossypol accretion of 1.28 mg kg-1 (on wet basis) was recorded in 100CSM group which was very well below the critical limit set by FDA. As a conclusion, fishmeal can be completely replaced using cottonseed meal in the diet of pompano without adverse effect on growth, metabolism and general health.

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Nutrient Retention by Fish in a Multispecies Recirculating Aquaculture Facility

Cited by 7 publications

References 9 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

Enzymological, Histological and Serum Biomarkers Responses of Snubnose Pompano on Complete Replacement of Fishmeal Using Cottonseed Meal Supplemented With Lysine and Methionine in the Diet

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