 Bioremediation is the use of microorganisms to treat contaminated water.A carefully managed environment is needed for the microorganisms which includes nutrients and hydrocarbons such as oil or other contaminants, and oxygen.In pilot scale studies, bio-remediation was used as one stage in a multi-stage purification process involving a plate separator to remove the majority of the contaminants and was able to treat pollutants at very low concentrations including organic contaminants such as glycerol, solvents, jet fuel, detergents, and phosphates.