Half velocity constant (Ks)
Ks is the half velocity constant and is numerically
equal to the substrate concentration. It is the maximumvalue at saturation concentration of growth limiting substrate. The value of Ks for this study came out
to be 534.6 mg/l sBOD. The range of Ks for domestic
wastewater lies between 25 and 100 mg/l BOD13
, for
tannery wastewater Ks is 488 mg/l, and for cheesing
processing it is 482.5 mg/l. A large value for Ks
shows that the maximum specific yield of bacteria
occurs at high substrate concentration in the case of
dairy industry and other industrial wastewaters. Al-
though Ks is one of the coefficients that are normally
determined, yet it has no direct application in the
process design. The only significance of Ks is more
of a theoretical nature and gives an idea about change