Valorization of Oilfield Produced Water on the Recovery of Valuable Salt

Large volumes of Produced Water (PW) are being generated to surface facilities from underground reservoirs during the process of oil and gas extraction. PW is a mixture containing a complex composition of organic and inorganic pollutants threatening the environment. A huge load of salt in PW is mainly depending on the geological framework of the reservoir. In this study, we investigated a lab-scale evaporation-crystallization process coupled with ventilation for the recovery of valuables salt from PW treated by sand filtration. The results show two successive crystallizations of 96,62% and 92,25% Sodium chloride (NaCl), respectively. The effect of ventilation on the acceleration of the crystallization is noticeable.