Chapter 8
Experimental Validation of the Model
Developed and Process Design
of Fixed-Bed Hybrid Bioreactor
8.1 Basic Consideration
The FORTRON program developed for mathematical modeling was run considering
the input values like influent substrate concentration (S0), hydraulic retention time
(θ ), specific surface area (a), attached biomass density (Xf) and relevant kinetic coefficients as well as biofilm specific parameters like half-velocity constant (K), maximum
specific rate of substrate utilization (k), biomass yield coefficient (Y ), biomass loss
rate due to shear from biofilm (b s ), biomass decay rate (b d ), total biomass loss rate
(b t ), molecular diffusivity in biofilm (Df) and thickness of liquid layer in biofilm
(L). The program was run for predicting the exiting substrate (COD) concentration,
which is the key output parameter for performance evaluation of the reactor. In this
case, experimental value of the effluent COD concentrations flux and total biofilm
thickness was experimentally found out in semi-batch study and was compared with
that obtained from computer program output for validation of the proposed under
different conditions was validated with that predicted from the bioreactor model. In
order to find out the accuracy of the developed model, one laboratory-scale hybrid
bioreactor setup was run both under semi-batch and continuous mode. The continuous mode run was conducted using both synthetic carbonaceous wastewater and
real municipal wastewater. The output data like exit substrate concentration, average
substrate flux and total bio-film thickness were experimentally found out in semi
batch study and was compared with that obtained from computer program output
for validation of the proposed model. However, only exiting substrate concentration
has been considered for validation under continuous mode of operation using both
synthetic carbonaceous wastewater and real municipal wastewater.
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
S. Sarkar, Fixed Bed Hybrid Bioreactor, Green Energy and Technology,
https://doi.org/10.1007/978-981-33-4546-1_8
107
Experimental Validation of the Model
Developed and Process Design
of Fixed-Bed Hybrid Bioreactor
8.1 Basic Consideration
The FORTRON program developed for mathematical modeling was run considering
the input values like influent substrate concentration (S0), hydraulic retention time
(θ ), specific surface area (a), attached biomass density (Xf) and relevant kinetic coefficients as well as biofilm specific parameters like half-velocity constant (K), maximum
specific rate of substrate utilization (k), biomass yield coefficient (Y ), biomass loss
rate due to shear from biofilm (b s ), biomass decay rate (b d ), total biomass loss rate
(b t ), molecular diffusivity in biofilm (Df) and thickness of liquid layer in biofilm
(L). The program was run for predicting the exiting substrate (COD) concentration,
which is the key output parameter for performance evaluation of the reactor. In this
case, experimental value of the effluent COD concentrations flux and total biofilm
thickness was experimentally found out in semi-batch study and was compared with
that obtained from computer program output for validation of the proposed under
different conditions was validated with that predicted from the bioreactor model. In
order to find out the accuracy of the developed model, one laboratory-scale hybrid
bioreactor setup was run both under semi-batch and continuous mode. The continuous mode run was conducted using both synthetic carbonaceous wastewater and
real municipal wastewater. The output data like exit substrate concentration, average
substrate flux and total bio-film thickness were experimentally found out in semi
batch study and was compared with that obtained from computer program output
for validation of the proposed model. However, only exiting substrate concentration
has been considered for validation under continuous mode of operation using both
synthetic carbonaceous wastewater and real municipal wastewater.
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
S. Sarkar, Fixed Bed Hybrid Bioreactor, Green Energy and Technology,
https://doi.org/10.1007/978-981-33-4546-1_8
107