Treatment of oily wastewaters by Lipase enzyme producing bacteria

Oily Wastewater causes severe environmental pollution and damage to aquatic life. Different methods for treating the wastewater are applied to one of the most important biological methods. Enzymatic treatment of wastewater is also an example of the ways in which biological research has attracted much attention. The purpose of this study، isolation of bacteria producing lipase enzyme and then use them in the oily wastewater treatment. Two separate locations، including Abadan refinery soil and the Behshar Industrial town sewage treatment plant. Among the isolated bacteria، two strains of bacteria belonging to Staphylococcus and Flavobacter was used for subsequent studies. They ranged between 0. 6 to 3. 25 u/ml of lipase activity. The removal of the oil was measured using gravimetric، for concentrations less than 4 grams per liter to about 95% and for concentrations greater than 4 gr/l ranged from 20 to 50 percent.