جداسازي گوگرد از نفت خام سنگين ميدان سروش با استفاده از روش زيستي

Biological Sulfur Removal from Heavy Crude Oil of Soroush Oil Field

Combustion of sulfur containing fuels will lead to formation of air pollutants such as SO2 and acid rains. It is not possible to desulfurize all the sulfur-containing compounds of the fuels by the existing sulfur removal methods (such as hydrodesulfurization). Therefore, many researchers have focused on biological sulfur removal. Varios parameters have a great role in isolating biodesulfurizing microorganisms, which are explained in this paper. These papmeters have been considered and as the result, three biodesulfurizing microorganisms have been isolated: BS1 thermophilic bacterium, MS1-1 mesophilic bacterium and WS4 fungus (Stachybotrys sp.). They are able to desulfurize the heavy crude oil of Soroush oil field with 82% (in 6 days) , 76%(in 6 days) and 76% (in 3 days), respectively. They are able to remove sulfur and nitrogen from the heavy crude oil, selectively. Heavy crude oil biodesulfurization project was initiated by Petroleum Engineering Development Company (PEDEC), a subsidiary of National Iranian Oil Company.