Biodegradation of paraffin in crude oil: Prevention of wax deposition

Abstract

Microorganisms were obtained by separation and purification experiment from waxy oil production wells in Jilin oil field. The paraffindegrading strain was identified as Bacillus sp.. After microbial treatment, the paraffin degradation rate could reach to 79.3 %, the paraffin prevention rate could reach to 68.4 %, the reduction rate of crude oil viscosity was 56.1 %, the oil freezing point reduced by 5.5 °C and the reduction rate of culture surface tension was 46.3 %. By analyzing the data, the paraffin-degrading strain has better effect on microbial prevention of wax deposition.