An aerobic biochemical process uses a CSTR w/o recycle. The feed characteristics are as follows: Influent substrate concentration, So = 200 mg/L; half- velocity coefficient, Ks = 50 mg/L; maximum, specific substrate utilization rate, k = 5 g/g- day; yield coefficient, Y = 0.5 g Xa/g substrate consumed; microorganism decay coefficient, b = 0.10 day-1. 1. The process goal is the production of active biomass. Determine the hydraulic retention time that the reactor should be operated in order to maximize the reactor active biomass concentration (Xa). How does this retention time compare with the minimum solids retention time that the system can theoretically be operated? Calculate the solids retention time safety factor. 2. Based on the solids retention time for maximum Xa calculated above, estimate the active biomass concentration (Xa) and the substrate removal efficiency (E, %)
roblem 1
An aerobic biochemical process uses a CSTR w/o recycle. The feed characteristics are as
follows: Influent substrate concentration, So = 200 mg/L; half- velocity coefficient, Ks = 50
mg/L; maximum, specific substrate utilization rate, k = 5 g/g- day; yield coefficient, Y = 0.5
g Xa/g substrate consumed; microorganism decay coefficient, b = 0.10 day-1.
1. The process goal is the production of active biomass. Determine the hydraulic
retention time that the reactor should be operated in order to maximize the reactor
active biomass concentration (Xa). How does this retention time compare with the
minimum solids retention time that the system can theoretically be operated?
Calculate the solids retention time safety factor.
2. Based on the solids retention time for maximum Xa calculated above, estimate the
active biomass concentration (Xa) and the substrate removal efficiency (E, %)
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