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فناوری منابع زیستی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • demulsifying properties of extracellular products and cells of pseudomonas aeruginosa msj isolated from petroleum-contaminated soil

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    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 515
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     a strain of pseudomonas aeruginosa isolated from a site contaminated with refined oil products exhibited demulsification capabilities against tween 80–span 80 stabilized oil-in-water (o/w), tween 80-stabilized water-in-oil (w/o) model emulsions (kerosene–water), and an industrial emulsion (daido dairoll pa-5a). gc–ms analysis confirmed the presence of fatty acids and carbohydrates in the extracellular biodemulsifier. the demulsifying activity of cells and culture supernatants was favored by growth in media containing 1% diesel oil. there was a correlation between culture age, de-emulsification and cellular hydrophobicity, and highest activities were observed for cells and supernatants from 96-h cultures. activity increased with addition of up to 60 mg cells or 300 μl supernatant to emulsions. the activity was relatively stable at 20–40 °c and to freezing, but was reduced by 69% by washing the cells with chloroform–methanol-water. this demulsifier has potential for application in biotreatment of emulsified oily wastewaters to promote recovery and/or degradation of oil.

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