Petroleum Exploration & Production Research Institute, SINOPEC, Beijing 100083, China.
Bioresour Technol. 2012 Apr;110:338-42. doi: 10.1016/j.biortech.2012.01.073. Epub 2012 Jan 24.
Oil extraction from oil sludge with biosurfactant formulas was optimized by a Taguchi orthogonal array design of L16 (4(5)) with five main factors, including biosurfactant type (surfactin, lichenysin, rhamnolipid and emulsan), biosurfactant concentration, pH, salinity and solvent. Oil recoveries obtained with the sixteen batch washing experiments with the selected levels of each factor were processed with Design Expert/SPSS and a specific combination of factors with a predicted oil recovery of 76.81% was obtained. The predicted optimal biosurfactant formula of 2.0g/L rhamnolipid, pH 12.0, 10g/L NaCl, and 5.0g/L n-butanol were validated by a washing experiment that yielded an oil recovery of 74.55%, which was 27.28% higher than the grand average oil recovery of the whole experiment design. Based on the optimum biosurfactant formula, the oil extraction process followed first-order kinetics as the washing rate constant and final oil recovery increased with temperature. These results will be informative and meaningful for the design of oil sludge treatment in industrial application.
采用 L16（4(5)）的 Taguchi 正交数组设计优化了生物表面活性剂配方从油泥中提取油，其中五个主要因素包括生物表面活性剂类型（表面活性剂、地衣素、鼠李糖脂和乳化剂）、生物表面活性剂浓度、pH 值、盐度和溶剂。使用所选因素的每个水平进行了 16 次批量洗涤实验，对获得的十六次洗涤实验的油回收率进行了 Design Expert/SPSS 处理，得到了一种预测油回收率为 76.81%的特定组合因素。通过洗涤实验验证了预测的最佳生物表面活性剂配方，即 2.0g/L 鼠李糖脂、pH 值 12.0、10g/L NaCl 和 5.0g/L 正丁醇，其产率为 74.55%，比整个实验设计的总平均油回收率高 27.28%。基于最佳生物表面活性剂配方，油提取过程遵循一级动力学，随着温度的升高，洗涤速率常数和最终油回收率均增加。这些结果对于工业应用中油泥处理的设计具有信息性和意义。
