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The pursuit of high oil recovery rate has been a persistent objective for oil industry. Pseudomonas sp. LP-7 and Bacillus sp. PAH-2 were isolated from oil-contaminated surface soil samples of an oilfield. The antimicrobial degradation rates(ADRs) of polymers achieved by LP-7 and PAH-2 were evaluated at a temperature of 35 °C in the mineral salt media during the shaken flask trial. The ADRs of copolymer synthesized by using a surfactant with a concentration of 5% could reach 8.4% for PAH-2 and 15.3% for LP-7. The ADRs of copolymer could reach 10.4% for PAH-2 and 21.3% for LP-7,when the polymer concentration was 2 g/L. All results confirmed that the ADRs of copolymers increased with an increasing content of HDDE(capsaicin derivative monomer) in the polymer. The copolymers also manifested excellent antimicrobial degradation performance in the presence of Cu~(2+), Zn~(2+), and Pb~(2+) ions, respectively, which had great potential for applications in enhanced oil recovery.
The pursuit of high oil recovery rate has been a persistent objective for oil industry. Pseudomonas sp. LP-7 and Bacillus sp. PAH-2 were isolated from oil-contaminated surface soil samples of an oilfield. The antimicrobial degradation rates (ADRs) of polymers achieved by LP-7 and PAH-2 were evaluated at a temperature of 35 ° C in the mineral salt media during the shaken flask trial. The ADRs of copolymer synthesized by using a surfactant with a concentration of 5% could reach 8.4% for PAH-2 and 15.3% for LP-7. The ADRs of copolymer could reach 10.4% for PAH-2 and 21.3% for LP-7, when the polymer concentration was 2 g / L. with an increasing content of HDDE (capsaicin derivative monomer) in the polymer. The copolymers also manifested excellent antimicrobial degradation performance in the presence of Cu ~ (2+), Zn ~ (2+), and Pb ~ (2+) ions, respectively, which had great potential for applications in enhanced oil recovery.