Department of Building Civil and Environmental Engineering, Concordia University, 1455 De Maisonneuve Blvd. W., Montreal, Quebec, H3G 1M8, Canada.
Department of Building Civil and Environmental Engineering, Concordia University, 1455 De Maisonneuve Blvd. W., Montreal, Quebec, H3G 1M8, Canada.
J Hazard Mater. 2018 Sep 15;358:434-440. doi: 10.1016/j.jhazmat.2018.07.032. Epub 2018 Jul 7.
Upstream and downstream petroleum industry generate of significant amounts of oily sludge per day. On the other hand, a disposal of such sludge requires expensive pre-treatments following local regulations. Conventional processes, like centrifugal separation provide sludge volume reduction and water extraction. However, water-in-oil emulsion requires extra stages for phase separation, which overall increases the costs. Therefore, electrokinetically (EK) assisted oil-water phase separation method was considered. In this study, a novel implemented controller, installed into the EK system, permitted to increase the length of exposure time to electrical field, while a significant decrease of energy consumption was observed. The controller, implemented based on Percolation Theory and applied to a linear horizontal EK system, showed enhanced sludge demulsification and improvement the quality of separated fractions. TGA analysis showed a superior quality of liquids extracted by EK with controller comparing to liquids without controller or generated by centrifuging process. A reaction rate with respect to temperature to assess the presence of water in the oil was also defined. The method, shown in this paper, advances the oil-water phase separation and permits for better oil recovery and sludge volume reduction.
每天上游和下游石油工业都会产生大量的含油污泥。另一方面，根据当地法规，这种污泥的处理需要昂贵的预处理。传统的工艺，如离心分离，可以实现污泥体积的减少和水的提取。然而，油水乳液需要额外的阶段进行相分离，这总体上增加了成本。因此，考虑采用电动（EK）辅助油水相分离法。在这项研究中，一种新的控制器被安装到 EK 系统中，允许增加暴露在电场中的时间长度，同时观察到能耗显著降低。该控制器基于渗流理论设计，并应用于线性水平 EK 系统，显示出增强的污泥破乳效果，并改善了分离部分的质量。TGA 分析表明，与没有控制器或通过离心处理产生的液体相比，用控制器提取的液体具有更高的质量。还定义了一个关于温度的反应速率来评估油中是否存在水。本文所述的方法推进了油水相分离，并允许更好地回收油和减少污泥体积。
