Determine the oxidation ditch dimensions and select brush aerators for the extended aera...

Determine the oxidation ditch dimensions and select brush aerators for the extended aeration oxidation ditch at Pasveer ( Problems 16-28 , 16-29 , and 16-30 ). Use the data in Tables 16-15 and 16-16 to select the aerators.

Tables 16-15 and 16-16

Problems 16-30

Estimate the mass of sludge to be wasted each day from the extended aeration oxidation ditch at Pasveer ( Problem 16-28 ).

Problems 16-29

Determine whether or not there is sufficient alkalinity for nitrification of the extended aeration oxidation ditch at Pasveer ( Problem 16-27 ). Compute the mass per day of sodium bicarbonate to add if alkalinity is required. Assume a residual of 80 mg/L as CaCO₃ is required to maintain the pH.

Problems 16-28

Estimate the volume of an extended-aeration oxidation ditch for carbonaceous BOD oxidation and nitrification for the city of Pasveer using the following design data:

Problem 16-27

Using the EPA criteria, design a controlled discharge oxidation pond for Coprolite. Coprolite is located in a state where the average winter temperature is 16^oC. The design assumptions are as follows: