Two activated sludge aeration tanks in Podunk, MO are operated in series. Each tank has the follwing dimensions: 7.0 m wide x 28.0 m long x 3.5 m effective liquid depth. The plant operating parameters are:
Flow = 0.0945 m^3/s MLVSS = 1650 mg/L
BOD5 after pimary settling = 135 mg/L MLSS = 1.35 (MLVSS)
Determine the aeration period and F/M ratio for these operating conditions.