[Microbial potential for cleaning the oiled iron scale]

The possibility of using microorganisms to clean oiled iron scale of metallurgical production was investigated with the goal of recuperation. A stable microbial association growing on mineral oil as the sole carbon source was isolated from a sample from oiled iron scale taken directly from a metallurgical plant. For microbial cultures isolated from this association, the taxonomic position, as well as their morphological and cultural characteristics, were determined. The microorganisms belonged to the genera Luteimonas, Alcanivorax, Flavobacterium, and Pseudomonas. Microbial associations oxidizing mineral oil were found to contain some microorganisms incapable of its utilization, which stimulated the hydrocarbon-oxidizing microflora. Application of the isolates, as well as of the strains from microbial collections, resulted in a 58% decrease in residual oil content in treated samples of the oiled iron scale.