Assignment #1
Round answers to an appropriate number of digits and include proper units.
A labelled diagram is required for each question.
Answer the following problems, providing details on all calculations. The #, ##, ### or #### will represent the LAST 1,2,3 or 4 digits of your student number. 000837359
Question 1) Air Pollution Mass Balance
The City of A is approximately 25 km by 40 km . The average wind speed is 15 kph from the northwest and flows through an altitude of approximately 1 km. If the average annual particulate concentration in the city is 57 ug/m3, what is the annual quantity of pollutants discharged into the air above the City of A?Assume the concentration of particulates coming into Hamilton is ‘0’; and accumulation of particulates is 37359 kg/d. Use a block diagram to illustrate your work.
Question 2) Dissolved Oxygen in Water
An industrial WWTP discharges into a large river 0.42 m3/s of industrial effluent with an ultimate BOD concentration of 273 mg/L and a D.O. concentration of 1.9 mg/L at a temperature of 20∘C. The velocity of the river is 0.75 m/s. Upstream of the point of discharge, the river has a temperature of 8∘C, an ultimate BOD of 17 mg/L and a flow rate of 5.1 m3/s. Use a diagram to illustrate the problem. State all assumptions.
Calculate:
the DO concentration at the point of discharge
the DO deficit at the point of discharge
the ultimate BOD at the point of discharge
