Calculate the ultimate BOD of the mix if the waste water flowing at 4.5 1/s having 5 day BOD 450 mg/l is discharged in a river flowing at 400 1/s. The BOD of the river before discharging of sewage is zero and the deoxygenation constant at base 'e' is 0.40 per day.

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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.