(Solved): An existing oxidation ditch (OD) was designed and constructed on the basis of zero net sludge produc ...
An existing oxidation ditch (OD) was designed and constructed on the basis of zero net sludge production to remove organic matter. The design flow of the (OD) was
25000(m^(3))/(d). The design criteria were as follows:
S_(0)=300mgBOD(s)/(L), required effluent concentration
(S)=10mgBOD(s)/(L)
Y=0.50mgvs(s)/(m)gBOD,
Ks=60mgBOD(s)/(L),K_(d)=0.02d^(-1),\mu _(m)=2.0d^(-1), X
=3500mgMLVSS
/L. A. What is the volume of the OD? B. What is the value of waste activated sludge "Qw" and (8c)? C. What would be the value of " S "if the flow increased to
50000(m^(3))/()day assuming that X remains
3500m(g)/(L)? What is your comment on the value of S ? D. What are the values of
S,xand
(F)/(M)if we operate the OD on a CFCMR model instead of Zero net sludge model when the flow increases to
50000(m^(3))/()day? Assume a sludge age value (
\theta c) of 20 days. E. What are the values of the sludge production"
P_(x)" and sludge waste "
Q=" for part " D " above assuming
xr=12000mgMLVSS
/Land
x_(e)=20mgs(s)/(L)?
