Determine the total length of brush aerators for the extended aeration oxidation ditch a...

Determine the total length of brush aerators for the extended aeration oxidation ditch at Brooklyn ( Problems 16-33 , 16-34 , 16-35 ). Use the data in Table 16-15 for the length estimate. Use the following assumptions in the design:

Clean water correction, α = 0.70 for nitrification

Salinity correction, β = 0.95

Summer wastewater temperature = 24^oC

Operating DO = 3.0 mg/L

Table 16-15

Problems 16-35

Estimate the mass of sludge to be wasted each day from the extended aeration oxidation ditch at Brooklyn ( Problem 16-33 ).

Problem 16-34

Determine whether or not there is sufficient alkalinity for nitrification of the extended aeration oxidation ditch at Brooklyn ( Problem 16-33 ). 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.

Problem 16-33

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

Assume the MLSS = 3,000 mg/L, MLVSS = (0.75) MLSS, and typical kinetic coefficients in Tables 16-14 and 16-5 apply.

Tables 16-14 and 16-5