title: A novel way to enhance the oil recovery ratio by Streptococcus sp. BT-003.
abstract: Degrading hydrocarbon by Streptococcus sp. BT-003 as a kind of microbe for oil recovery was analyzed in this paper. The Streptococcus sp. BT-003 showed that it could use crude oil as the sole source of carbon and produce organic acid, bio-gas and polysaccharide which were propitious to emulsify and reduce the viscosity of crude oil. After cultivating 8-14 h, the viscosity of crude oil reduced from 8000-15000 mPa . s to 50-250 mPa . s. The content of organic acid increased 8-15 times, and carbon dioxide and polysaccharide reached 55 ml/l and 8 g/l respectively. Paraffin and resin reduced by 60-95%, and light components increased obviously. Fluid rheology was better than before, the interfacial tension between the crude oil and water were reduced effectively.
authors.affiliation: College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Xu
authors.forename: Chang
authors.initials: C
authors.lastname: Chen
authors.forename: Chunqiao
authors.initials: C
authors.lastname: Liu
authors.forename: Shurong
authors.initials: S
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Wu
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang