Impacts of jet inflow on hydrodynamic performance and waste removal efficiency in recirculating aquaculture system aquaculture tanks based on prototype experiments.

This article focuses on a full-scale prototype experiment investigating the hydrodynamic performance and waste removal efficiency of recirculating aquaculture system (RAS) tanks under varying inlet pipe configurations. The study examined the effects of jet inflow angle, inflow rate, inflow area, and inlet pipe location on flow velocity, flow uniformity, low-velocity zones, and particle removal using advanced image processing techniques and flow measurements. Key findings indicate that placing the inlet pipe on the curved wall and setting the jet inflow angle at 45° optimize hydrodynamic conditions and waste removal efficiency, while reducing the jet inflow area enhances flow velocity and uniformity but may increase fish stress. These results provide practical guidance for designing RAS tanks to improve sustainable aquaculture practices, with future research suggested on pond structural modifications.