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首页> 外文期刊>RSC Advances >Physicochemical characterization and optimization of glycolipid biosurfactant production by a native strain of Pseudomonas aeruginosa HAK01 and its performance evaluation for the MEOR process
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Physicochemical characterization and optimization of glycolipid biosurfactant production by a native strain of Pseudomonas aeruginosa HAK01 and its performance evaluation for the MEOR process

机译：铜绿假单胞菌铜绿假药生物菌株生产的物理化学表征及糖脂生物活性剂的优化及MEOR过程的绩效评价

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摘要

In this study, a glycolipid type of biosurfactant (BS) was produced, its characteristics were evaluated and several flooding tests were conducted in a micromodel to investigate its potential for enhancing oil recovery. A rhamnolipid BS producer strain was identified as a bacterium belonging to the genus Pseudomonas aeruginosa. This BS showed good stability at temperatures of 40-121 degrees C, pH values of 3-10 and salinity up to 10% (w/v) NaCl which is important in Microbial Enhanced Oil Recovery (MEOR). The rhamnolipid decreased the surface tension of water from 72 to 28.1 mN m(-1) with a critical micelle concentration of 120 ppm. Thin layer chromatography, FTIR spectroscopy, H-1-NMR and C-13-NMR spectroscopy revealed the glycolipid structure of the BS. Response surface methodology was applied to optimize BS production. Several micromodel flooding tests were conducted to study the capability of the produced rhamnolipid in enhanced oil recovery for the first time. An oil recovery factor of 43% was obtained at 120 ppm of BS solution whereas the recovery factor obtained for water flooding was 16%. Contact angle measurements showed that BS solutions altered the wettability of a glass surface from oil wet to a strongly water wet state. Also the results illustrated that all BS solutions were impressive in microbial enhanced oil recovery (MEOR) and using the produced BS a considerable amount of trapped oil can be extracted due to interfacial tension reduction, wettability alteration towards water wet conditions and improving the mobility ratio.
机译：在该研究中，制备了糖脂磷脂类型的生物活性剂（BS），评价其特征，并在Micrododel中进行几种泛滥试验，以研究其提高油回收的可能性。鉴定rhamnolipid BS生产者菌株作为属于假单胞菌属铜绿假单胞菌属的细菌。该BS在40-121摄氏度的温度下显示出良好的稳定性，pH值为3-10和盐度，高达10％（w / v）NaCl，这对于微生物增强的溢油（Meor）重要。 rhamnolipid通过临界胶束浓度为120ppm，从72-28.1mN m（-1）降低了水的表面张力。薄层色谱，FTIR光谱，H-1-NMR和C-13-NMR光谱显示BS的糖脂结构。应用响应面方法应用于优化BS生产。进行了几种微模型泛洪试验，以研究生产的菱诺哌啶的能力首次提高溢油中。在120ppm的BS溶液中获得了43％的储存因子，而用于水淹水的回收源为16％。接触角测量结果表明，BS溶液从湿润的油湿地改变了玻璃表面的润湿性。结果表明，所有BS溶液在微生物增强的采油（MEOR）中令人印象深刻，并且使用产生的BS由于界面张力降低，润湿性湿润条件的润湿性改变并提高迁移率，可以提取大量的被捕获的油。

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