344
B. Chakraborty et al.
Fig. 3 MLSS concentration profile during carbon oxidation of simulated wastewater sample in
batch reactor [Initial MLSS = 2025 mg/L]
of MLSS concentration was found to be ceased and a steady-state condition was
achieved, which indicates that enzymatic activity of carbonaceous microorganisms
in the mixed culture is exhausted and fully utilized.
3.3 Kinetics for Carbon Oxidation Study in Batch Reactor
The values for the reciprocal of specific substrate utilization rate (1/U C ), obtained
from the results were plotted against the reciprocal of effluent COD (1/S) and
substrate removal kinetics was evaluated using simple linear equation 1/U C =
[(K s /k)(1/S)] + (1/k). A best-fit graph was drawn by applying the least square
approach using experimental data, as shown in Fig. 4. The slope and intercept of
the straight line were K s /k and 1/k, respectively. The value of k was 9.09 per day,
whereas the half velocity constant (K s ) was 350.69 mg/L for an initial COD of 1350
± 30 mg/L. The value of K s obtained for carbon oxidation was found to be higher
Fig. 4 Substrate utilization kinetic for carbon oxidation study of simulated wastewater sample in
batch reactor
B. Chakraborty et al.
Fig. 3 MLSS concentration profile during carbon oxidation of simulated wastewater sample in
batch reactor [Initial MLSS = 2025 mg/L]
of MLSS concentration was found to be ceased and a steady-state condition was
achieved, which indicates that enzymatic activity of carbonaceous microorganisms
in the mixed culture is exhausted and fully utilized.
3.3 Kinetics for Carbon Oxidation Study in Batch Reactor
The values for the reciprocal of specific substrate utilization rate (1/U C ), obtained
from the results were plotted against the reciprocal of effluent COD (1/S) and
substrate removal kinetics was evaluated using simple linear equation 1/U C =
[(K s /k)(1/S)] + (1/k). A best-fit graph was drawn by applying the least square
approach using experimental data, as shown in Fig. 4. The slope and intercept of
the straight line were K s /k and 1/k, respectively. The value of k was 9.09 per day,
whereas the half velocity constant (K s ) was 350.69 mg/L for an initial COD of 1350
± 30 mg/L. The value of K s obtained for carbon oxidation was found to be higher
Fig. 4 Substrate utilization kinetic for carbon oxidation study of simulated wastewater sample in
batch reactor