![]() ![]() Baltic Sea water and concentrated NaCl solutions were used as a feed. For this purpose, hydrophobic capillary polypropylene (PP) membranes were tested during the long-term MD studies. Therefore, the aim of this study is to investigate the effect of low-concentration surfactants in oil-contaminated high-salinity solutions on the MD process efficiency. The present study sheds light on improving the MD for the treatment of oily wastewaters.Īpplication of the membrane distillation (MD) process for the treatment of high-salinity solutions contaminated with oil and surfactants represents an interesting area of research. Moreover, it was found that performing a cyclic rinsing of the module with a 3% HCl solution is an effective method to maintain a satisfactory module performance. Likewise, increasing the feed flow velocity was beneficial to the increase in the flux. However, the lower temperature ensured the limited scaling phenomenon during the treatment of oily wastewaters. ![]() It was demonstrated that the permeate flux increased significantly with increasing feed temperature. The obtained results highlight the potential of PP membranes application for a stable and reliable long-term treatment of oily wastewater. In order to investigate the impact of the operational parameters on the process performance, the experiments were conducted under various values of the feed flow velocity (from 0.03 to 0.12 m/s) and the feed temperature (from 323 to 343 K). The commercial Accurel PP V8/2 membranes (Membrana GmbH, Germany) were used. For comparison purposes, experiments were also carried out with model NaCl solutions, the Baltic Seawater and oil in water emulsions. In the present study, membrane distillation (MD) was applied for the treatment of oily saline wastewaters produced on ships sailing the Baltic Sea. ![]()
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