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Three Dimensional Model of a Fluid and Tracer Transport in Disinfection Contact Tank

Author : Shaikh Mohamed Ashfaq

Pages : 305-309
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Chlorine is mostly used as disinfect in water treatment. Chlorine contact tanks are designed to maximize the contact time between chlorine and pathogens before the water is delivered to consumers. Thus the design objective is to maximize the time that it takes for water to travel from the tank influent to the effluent. The present study is used to investigate the hydraulic performance of the water tank for any dead spots or low velocity zones, resulting in water quality deterioration by using computational fluid dynamics (CFD) 3D model. In case of any discrepancy in the hydraulic performance of the tank, CFD analysis is used to propose modification to improve the hydraulic performance of the tank. In present analysis Tracer studies are used to determine the hydraulic characteristics of the disinfection contact tank. The results from tracer studies are used to obtain accurate estimates of the effective contact time. Residence time distribution (RTD) which is one of the important parameter of the process performance to achieve desire conversion was estimated using CFD tools. The effects of different tank flow condition are studies as well using CFD.

Keywords: CFD; 3D; RTD; Chlorine Contact tank; Tracer; Hydraulic

Article published in International Journal of Current Engineering and Technology, Vol.5, No.1 (Feb-2015)


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