title: Microbial treatment for prevention and removal of paraffin deposition on the walls of crude pipelines.
abstract: Two bacterial strains, paraffin removal strain and biosurfactant-producing strain, named BHJ-1 and QFL-1, were isolated from oil production wells in Daqing oilfield of China. They were subsequently identified as Bacillus cereus QAU68 and Bacillus subtilis XCCX, respectively. As an indicator of the degradation paraffin, the inoculum concentration of BHJ-1 and QFL-1 were added in different proportions, the optimum proportion was 5:2. In this proportion the degradation rate of paraffin could reach 64 %, the prevention rate of paraffin could reach 55 %.
authors.affiliation: Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318 Heilongjiang China.
authors.forename: Jiang Hong
authors.initials: JH
authors.lastname: Liu
authors.affiliation: Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318 Heilongjiang China.
authors.forename: Yun Peng
authors.initials: YP
authors.lastname: Jia
authors.affiliation: Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318 Heilongjiang China.
authors.forename: Yi Tong
authors.initials: YT
authors.lastname: Chen
authors.affiliation: School of Life Sciences, Xiamen University, Xiamen, 361005 Fujian China.
authors.forename: Rui Dan
authors.initials: RD
authors.lastname: Xu
keywords: Bacillus cereus; Bacillus subtilis; Degradation; Paraffin