화학공학소재연구정보센터
Chemical Engineering & Technology, Vol.37, No.12, 2152-2164, 2014
Simulation Studies on Growth and Death of Microorganisms Using the Oil-Degrading Bacteria Petrotoga sp.
Three models were developed to estimate the potential of the selected bacteria Petrotoga sp., a thermophilic anaerobic oil-degrading microorganism. Fourteen data sets of these bacteria were simulated by a multilayer feed-forward neural network and an adaptive neuro-fuzzy interference system. Twelve data sets served for training and two for testing these models. A simplified numerical model was performed assuming two phases in the growth process of oil-degrading microorganisms, the logarithmic growth phase and the death phase. Comparison between these models in predicting bacterial cell concentration for different data sets indicates little difference between the overall average relative errors of the three methods and that all can be applied for prediction. Effects of salinity concentration, amount of yeast extract, and temperature on bacterial cell concentration were simulated by numerical and neural network models.