چكيده به لاتين
Airlift bioreactor, as one of the most common bioreactors has received a lot of attentions. So, the study on the important parameters and their effects on the bioreactor performance has got out standing importance. In this research, at first,the removal of 0.4, 0.6 and 0.8 g/l concentrations of phenol from aqueous mineral solution were evaluated using Alcaligenes faecalis in shake flasks. The kinetic constants values of the bioprocess were calculated using Haldane kinetic model. The maximum specific growth rate (μmax) of 0.121
h-1 and the inhibition coefficient (ki) of 280.1 mg/l were estimated for the bacteria at ambient temperature. In the next step, the removal experiments of phenol at mentioned concentrations were carried out in an External Airlift Bioreactor (EAB) with the volume of 0.78l at ambient temperature and aeration rate of 3 vvm.Phenol removalrate and biomass concentration in similar conditions were improved in EAB. After that, the bioreactor was modelled based on Tank in Series Model (TSM) using MATLAB software and the model prediction was compared to experimental results.The logical relationships were observed between the model parameters, such as air flow rate, volume of the bioreactor, dimensional ratio, and their effects on the performance of bioreactor. This confirms the accuracy and precision of TSM for forecasting the performance of the airliftbioreactor. Due to consideration of mass balance terms, kinetic equations and hydrodynamic parameters in the modeling, TSM can predict perfectly the two-phase microbial culture in EAB.
Keywords: Airlift Bioreactor, Phenol Pollutant, Tank in Series Model (TSM), Theory of TSM, MATLAB Software
