The metabolic capacity of the members of the genus Enterobacter has been explored, E. cloacae strain PB2 (Binks et al., 1996) was isolated from a munitions plant in UK by it ability to utilize nitrate esters explosives as a sole nitrogen source in growth. There is also wealth of information on aromatic compounds degradation by Escherichia coli as reviewed by Diaz et al., (2001). These investigations highlight various aromatic compounds utilized by E. coli such as hydroxicinnamic acid, phenyl acetate, styrene, benzoate and aromatic hydrocarbons. Other members of Enterobactericeae like Enterobacter (formerly Klebsiella) aerogenes have also been reported to degrade aromatic compounds (Grant 1967).