Conference Proceedings

International Conference on Advances in Environmental and Bio-Technology - AEBT 2014

Bacillus Pasteurii Mediated Ureolysis – A Numerical Approach For Kinetic Analysis Ureolysis Kinetics In Bacillus Pasteurii

Author(s) : BISWANATH MAHANTY    , CHANG GYUN KIM   , SUBIN KIM   

Abstract

Microbiological hydrolysis of urea (ureolysis) is a natural geochemical process which is closely linked with carbonate precipitation, or biocalcification. However, for sake of simplicity, ureolysis rate has often been considered to be first order with respect to urea concentration and quantitative role of microorganism remains underestimated. In this study, ureolysis and growth of ureolytic microorganism Bacillus pasteurii has been closely investigated in laboratory batch experiments at three different levels of initial urea and biomass concentration. Results suggest though biomass growth to be independent of initial urea concentration but ureolysis depends on both of the parameters. Experimental data modelling with a number independent rate expressions for biomass growth (i.e. exponential, logistic, Gompretz, modified logistic), ureolysis (1st order, pseudo-first order) as well as coupled (Monod, Contois model), reveals a modified logistic expression for growth and Michaelis–Menten substrate utilization kinetics for ureolysis were the mostsuitable representation.

Conference Title : International Conference on Advances in Environmental and Bio-Technology - AEBT 2014
Conference Date(s) : 04-05 January, 2014
Place : Hotel Lebua at State Tower, Bangkok
No fo Author(s) : 3
DOI : 10.15224/978-981-07-8859-9-52
Page(s) : 20 - 26
Electronic ISBN : 978-981-07-8859-9
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