Numerical study of flow and mixing processes in wastewater treatment systems**

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Numerical study of flow and mixing processes in wastewater treatment systems****The proposed project aims to develop a numerical model for simulating the flow and mixing processes in wastewater treatment system. The developed model will also be employed to carry out a case study (the sludge mixing in a suction header of a wastewater treatment plant). The focus of the application is on the distribution of flow and temperature fields. In addition, the influences of different geometric and operating conditions are also of interest. The model and relevant observations can help determine the system geometry, optimal operating conditions, and system materials. It should be noted that when sludge is heated or diluted, most empirical or theoretical formulations become invalid or less accurate, as they can significantly affect the hydraulic properties. Therefore, the present study can significantly improve the practice of designing wastewater treatment systems, as it will develop and apply an advanced three-dimensional numerical model. The study will also be of important research and academic significance, as it can help the researchers obtain a clear understanding of the flow and mixing processes of wastewater in treatment systems, which is crucial for the sound design of the treatment system and proper disposal of the wastewater. The results of the research study will lead to a more efficient design of the system and significant cost reduction as it will reduce the risk of uncertainties in design and will increase the margin of safety against failure or inadequate disposal of wastewater as well as preserving the environmental effects. **