Oliveira Neto Guilherme L, Oliveira Nívea G N, Delgado João M P Q, Nascimento Lucas P C, Magalhães Hortência L F, Oliveira Paloma L de, Gomez Ricardo S, Farias Neto Severino R, Lima Antonio G B
Federal Institute of Education Science and Technology of Piauí, Floriano 64808-475, Brazil.
Technical School of Floriano, Federal University of Piauí, Floriano 64808-605, Brazil.
Membranes (Basel). 2021 Feb 8;11(2):121. doi: 10.3390/membranes11020121.
Wastewater from the oil industry can be considered a dangerous contaminant for the environment and needs to be treated before disposal or re-use. Currently, membrane separation is one of the most used technologies for the treatment of produced water. Therefore, the present work aims to study the process of separating oily water in a module equipped with a ceramic membrane, based on the Eulerian-Eulerian approach and the Shear-Stress Transport (SST k-ω) turbulence model, using the Ansys Fluent 15.0. The hydrodynamic behavior of the water/oil mixture in the filtration module was evaluated under different conditions of the mass flow rate of the fluid mixture and oil concentration at the entrance, the diameter of the oil particles, and membrane permeability and porosity. It was found that an increase in the feed mass flow rate from 0.5 to 1.5 kg/s significantly influenced transmembrane pressure, that varied from 33.00 to 221.32 kPa. Besides, it was observed that the particle diameter and porosity of the membranes did not influence the performance of the filtration module; it was also verified that increasing the permeability of the membranes, from 3 × 10 to 3 × 10 m, caused transmembrane pressure reduction of 22.77%. The greater the average oil concentration at the permeate (from 0.021 to 0.037 kg/m) and concentrate (from 1.00 to 1.154 kg/m) outlets, the higher the average flow rate of oil at the permeate outlets. These results showed that the filter separator has good potential for water/oil separation.
石油工业废水可被视为对环境有危害的污染物，在处置或再利用之前需要进行处理。目前，膜分离是处理采出水最常用的技术之一。因此，本研究旨在基于欧拉-欧拉方法和剪切应力输运（SST k-ω）湍流模型，使用Ansys Fluent 15.0，研究配备陶瓷膜的模块中油水分离过程。在流体混合物质量流量、入口油浓度、油颗粒直径、膜渗透率和孔隙率的不同条件下，评估了过滤模块中水/油混合物的流体动力学行为。研究发现，进料质量流量从0.5 kg/s增加到1.5 kg/s会显著影响跨膜压力，跨膜压力从33.00 kPa变化到221.32 kPa。此外，观察到膜的颗粒直径和孔隙率不会影响过滤模块的性能；还证实，将膜的渗透率从3×10增加到3×10 m会导致跨膜压力降低22.77%。渗透液（从0.021 kg/m增加到0.037 kg/m）和浓缩液（从1.00 kg/m增加到1.154 kg/m）出口处的平均油浓度越高，渗透液出口处的平均油流速就越高。这些结果表明，该过滤分离器具有良好的油水分离潜力。
