• NEDELCUŢ Florin Eng. PhD, Assistant Professor, Mechanical Engineering Faculty of Brăila, MECMET Research Center, „Dunărea de Jos” University of Galați
  • GOANȚĂ Adrian Mihai Eng. PhD, Associate Professor, Director of Department, Mechanical Engineering Faculty of Brăila, Department of Engineering Sciences and Management, „Dunărea de Jos” University of Galați
Keywords: clarifiers, 3D modelling, flow analysis, CFD, Flowizard


This scientific paper focuses on a case study of the final clarifiers from Brăila city wastewater treatment plant (WWTP), one of the largest-capacity activated sludge process (ASP) plants along Danube River. The researches allowed us to obtain more detailed information in order to evaluate the actual mode of operation of this important component of the mentioned treatment plant. For this study, we first created a 3D virtual model, which helped us to model with CFD the wastewater flow through the clarifier. Ansys Flowizard analysis allowed an accurate estimation of some main parameters of wastewater treatment, as settling velocity is, the local flow velocity is therefore an essential parameter for
the evaluating the wastewater treatment efficiency. Another benefit of the CFD analysis was the possibility to visualize the magnitude of the turbulences and large swirls existing inside the clarifiers, as their distribution. With the help of the 3D modelling and CFD we managed to compare two operation cases, in order to better estimate the interval between the required sludge cleaning operations. This more accurate view of operation of final clarifiers, conducted by the CFD analysis presented here, will provide theoretical and technical basis for future proposals when modifying and improving the design of such clarifiers, in the benefit of the designers, engineers and users.

How to Cite
Florin, N., & Adrian Mihai, G. (2014). USING 3D MODELLING AND NUMERICAL SIMULATION TO OPTIMIZE LARGE WASTEWATER INSTALLATIONS. Journal of Industrial Design and Engineering Graphics, 9(2), 87-92. Retrieved from