environmental engineering
Using the following assumptions, determine the sludge age
and
cell wastage flow rate.
Assume:
Suspended solids in effluent negligible
Wastage is from aeration tank
, hence X = X
r
Yield coeffic
ient = 0.4
Bacterial decay rate = 0.04 1/d
Effluent BOD5
=10mg/L
F/M = 0.33 mg/mg*d
BOD5
after primary settling = 150mg/L
MLVSS = 1700mg/L
MLSS = 1.4(MLVSS)
Q = 0.0796m3/s
V = 1806 m3
Aeration period =
0.5d
