495-501Naturally occurring microbial consortia have been utilized in a variety of bioremediation processes. One important characteristic of bioremediation is that it is carried out in non-sterile open environments, which contain a host of microorganisms. Successful in situ bioremediation strategy should be tailored in such a manner that due consideration be given to the various environmental constraints (salinity, nutrient availability, anaerobic degradation, bioavailability considerations) that affect a particular location