3. Elaboration Question 4

Course subject(s) 3. Biological treatment

Question 4: Net biomass yield

For an industrial wastewater activated sludge process, the influent flowrate is 1000 m3/d, the amount of BOD in the influent water is 300 g/m3, the biomass concentration (X) is 2000 g/m3, the reactor BOD concentration (S) is 15 g/m3, and the reactor volume is 105 m3.

Determine the net biomass yield using the kinetic coefficients given in the below.

μmax 2 d-1
Ks 10 g/md3BOD
Y 0.4 g VSS/g BOD
kd 0.1 g VSS/g VSS d

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