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A Model for Adaptation of Microorganisms to Nitrates
Author(s) -
Gomes James,
Singhal Ashish,
Bhargava Swapnil,
Roychoudhury Pradip K.
Publication year - 1999
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/(sici)1521-4125(199909)22:9<785::aid-ceat785>3.0.co;2-6
Subject(s) - nitrate , biological system , exponential growth , adaptation (eye) , degradation (telecommunications) , lag , kinetics , exponential function , bacterial growth , ecology , mathematics , environmental chemistry , chemistry , biochemical engineering , environmental engineering , thermodynamics , environmental science , biology , engineering , bacteria , computer science , physics , mathematical analysis , telecommunications , computer network , genetics , quantum mechanics , neuroscience
A simple variation of Monod kinetics is presented which describes extended lag phases observed in microbial cultivation. This variation of Monod kinetics can be expressed in a compact exponential form and is used to explain the adaptation of mixed cultures to adverse environmental conditions. The performance of the Monod model and the proposed exponential model in predicting the behavior of a mixed culture exposed to high nitrate concentrations are compared. A parameter for nitrate degradation is defined which is correlated to changes in the maximum specific growth rate as the culture adapts to increasing concentrations of nitrate.