A Family Of Models To Study The Growth Of
Haloferax Mediterranei In Different Conditions
Author(s)
Y. Villacampa, F. García-Alonso, J. A. Reyes,
R. Martínez-Espinosa & M. J. Bonete
Abstract
Haloferax mediterranei is a denitrifying halophilic archaeon able to grow with
nitrite as the sole nitrogen source for growth in an assimilatory process under
aerobic conditions. This haloarchaeon can also reduce nitrite in a respiratory
process, where nitrite is the electron acceptor when oxygen conditions are
limited. Due to this capability, Haloferax mediterranei could be applied in salted
water bioremediation processes with the purpose of repairing the damage caused
by the excessive use of fertilizers in agricultural activities.
In this paper a family of different mathematical models has been generated to
allow the study and the prediction of Hfx. mediterranei growth in high salt media
with different nitrite concentrations. The relation between the growth and some
variables are studied, for example nitrite concentration (N), oxygen
concentration (O) and the time of growth (NH). This approach will allow us to
analyse future Hfx. mediterranei uses as agent for bioremediation processes.
Keywords: denitrification, Haloferax, bioremediation, modelling, stability.
1 Introduction
Denitrification is the reduction of nitrate or nitrite to gaseous nitrogen oxides.
This pathway occurs mainly in bacteria and is used by most denitrifiers to
support respiratory growth under anaerobic conditions [17]. Denitrification
produces nitrogen loss in agricultural soils, and emitted N2O destroys the ozone
layer and contributes to global warming. Deterioration of quality of inland and
coastal waters is a serious environmental problem. Of particular concern is the
Keywords
denitrification, Haloferax, bioremediation, modelling, stability.
Related Book
Other papers in this volume
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