Polycyclic aromatic hydrocarbons (PAHs), also known as poly-aromatic hydrocarbons or polynuclear aromatic hydrocarbons, are potent atmospheric pollutants that consist of fused aromatic rings and do not contain heteroatoms or carrysubstituents. Naphthalene is the simplest example of a PAH. PAHs occur in oil, coal, and tar deposits, and are produced as byproducts of fuel burning (whether fossil fuel or biomass). As a pollutant, they are of concern because some compounds have been identified as carcinogenic, mutagenic, and teratogenic. PAHs are also found in cooked foods. Studies have shown that high levels of PAHs are found, tor example, in meat cooked at high temperatures such as grilling or barbecuing, and in smoked fish. There tore, removing PAHs out environment is necessary. The bacterial BTL4 strain was isolated from wastewater of Tu Liem industrial zone after 3 enrichtment in meniral medium containing PAH. The colonies of this bacterial strain were white, opaque, viscous, growed on the surface of agar medium with a diameter 1-2 mm, secrected yellow pigment. The cell morphology of BTL4 in the Scanning Electron Microscopy (SEM) with magnification 15,000 times was a coccus with 0.8-1.2 um. The results of partial sequence 16S rDNA indicated that BTL4 belongs to genus Paracoccus and the highest homology (97 percent) to Paracoccus bengalensis species (AJ864469). Among the investigated tempuratures and pHs, the bacterial strain growed best at 37oC, pH from 6 to 8. This 16S rDNA sequence was registered in DDBJ genbank with accession number AB646256. The BTL4 strain degradated 25.5 percent pyrene with initial concentration of 100 ppm. This strain can be used to creat microbial communities to treatment PAH and other pollution compounds in sewage water at controlled conditions.