19. Two circular primary clarifiers are to be installed in a sewage treatment plant processing the wastewater for a town of 10 000 PE. Each clarifier has side water depth of 3.3 m. Design criteria for surface overflow rate has been set by local authority at a maximum of 40 m/d for average condition. The clarifier is designed to remove 35 percent BOD, and 65 percent SS. The wastewater contains 200 mg/1. BOD, and 240 mg/L SS. Based on the information given, determine : The dimension of the clarifier (i) (ii) HRT (iii) Weir loading rate (iv) BOD, and SS concentrations in the effluent of the clarifiers

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Mechanical Processes

In civil engineering, the materials have to undergo a series of manufacturing processes before using them in construction and structural applications. These manufacturing processes form the foundation stone of mechanical processes. Some of the civil engineering materials such as bars, metallic beams, metallic columns, surveying equipment, earthmovers, overhead cranes, structural and construction components, and even cement that is the most fundamental construction component need to undergo different manufacturing processes before they are ready to use. These processes are mechanical.