Poorly treated municipal wastewater is discharged to a stream. The river flow rate upstream of the discharge point is Q=8.7 m3/s. The discharge occurs at a flow of Qd= 0.9 m3/s and has a BOD concentration of 50 mg/L. Assuming that the upstream BOD concentration is negligible. a) What is the BOD concentration just downstream of the discharge point? b) B) If the stream has a cross-sectional area of 10 m2 what would the BOD concentration be 50 km downstream

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Basic Chemical Calculations (Process and Variables)

A basic chemical calculation involves the application of the law of chemical proportions to various reactions and material and energy balance calculations on various chemical processes. Basic chemical calculation helps students analyze various chemical processes and develop problem-solving skills. The chemical manufacturing processes are divided into unit operations involving physical changes of material and unit processes involving the chemical transformation of materials. For instance, fluid flow, heat transfer, and mass transfer are unit operations, and oxidation, reduction, and pyrolysis are unit processes.