Emperical Modeling of Growth Parameters in Cellulosimicrobium cellulans during Heavy Metal Tolerance

Abstract

In the present work we have studied the growth kinetics of Cellulosimicrobium cellulans under different metal stress. The strain used was Gram positive and non-pathogenic. Metal studied were Fe, Zn, Pb, Cu, Cd, and Ni. Growth curve of Cellulosimicrobium cellulans was studied under different concentrations of these metals. In the second part of our investigation we tried to established growth equation which can define the growth curve of Cellulosimicrobium cellulans. The three parameters μm, λ, Xm majorly contribute to growth equations. The changes in these parameters affect the location and duration of exponential or log phase t. Thus, we have chosen these factors primarily to model our system. In each case we have observed little deviation from the predicted equation at the maximum error percentage below 10% (α< = 10) R2<0.8. Next we have tried to model the cumulative effect of these metals simultaneously but our model has failed to reach an appreciable correlation with the experimental data set. In this case we may assume that more factors like mole fraction or partial molar volume of metal solution may have contributed to the growth profile.