Deoiled Produced Water Treatment Using Direct-Contact Membrane Distillation

2013 ◽  
Vol 52 (37) ◽  
pp. 13439-13448 ◽  
Author(s):  
Dhananjay Singh ◽  
Prakhar Prakash ◽  
Kamalesh K. Sirkar
Keyword(s):  
Water Treatment ◽  
Direct Contact ◽  
Produced Water ◽  
Membrane Distillation ◽  
Direct Contact Membrane Distillation ◽  
Produced Water Treatment

Polyoxadiazole hollow fibers for produced water treatment by direct contact membrane distillation

Desalination ◽  
2018 ◽  
Vol 432 ◽  
pp. 32-39 ◽  
Author(s):  
Jingli Xu ◽  
N.M. Srivatsa Bettahalli ◽  
Stefan Chisca ◽  
Mohammed Khalil Khalid ◽  
Noreddine Ghaffour ◽  
...  
Keyword(s):  
Water Treatment ◽  
Direct Contact ◽  
Produced Water ◽  
Membrane Distillation ◽  
Hollow Fibers ◽  
Direct Contact Membrane Distillation ◽  
Produced Water Treatment

scholarly journals The Water Flux Dynamic in a Hybrid Forward Osmosis-Membrane Distillation for Produced Water Treatment

Membranes ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 225
Author(s):  
Normi Izati Mat Nawi ◽  
Muhammad Roil Bilad ◽  
Ganeswaran Anath ◽  
Nik Abdul Hadi Nordin ◽  
Jundika Candra Kurnia ◽  
...  
Keyword(s):  
Water Treatment ◽  
Produced Water ◽  
Water Flux ◽  
Forward Osmosis ◽  
Membrane Distillation ◽  
Flux Dynamics ◽  
Flux Dynamic ◽  
Produced Water Treatment ◽  
Dynamic Hybrid ◽  
Membrane Wetting

Standalone membrane distillation (MD) and forward osmosis (FO) have been considered as promising technologies for produced water treatment. However, standalone MD is still vulnerable to membrane-wetting and scaling problems, while the standalone FO is energy-intensive, since it requires the recovery of the draw solution (DS). Thus, the idea of coupling FO and MD is proposed as a promising combination in which the MD facilitate DS recovery for FO—and FO acts as pretreatment to enhance fouling and wetting-resistance of the MD. This study was therefore conducted to investigate the effect of DS temperature on the dynamic of water flux of a hybrid FO–MD. First, the effect of the DS temperature on the standalone FO and MD was evaluated. Later, the flux dynamics of both units were evaluated when the FO and DS recovery (via MD) was run simultaneously. Results show that an increase in the temperature difference (from 20 to 60 °C) resulted in an increase of the FO and MD fluxes from 11.17 ± 3.85 to 30.17 ± 5.51 L m−2 h−1, and from 0.5 ± 0.75 to 16.08 L m−2 h−1, respectively. For the hybrid FO–MD, either MD or FO could act as the limiting process that dictates the equilibrium flux. Both the concentration and the temperature of DS affected the flux dynamic. When the FO flux was higher than MD flux, DS was diluted, and its temperature decreased; both then lowered the FO flux until reaching an equilibrium (equal FO and MD flux). When FO flux was lower than MD flux, the DS was concentrated which increased the FO flux until reaching the equilibrium. The overall results suggest the importance of temperature and concentration of solutes in the DS in affecting the water flux dynamic hybrid process.

scholarly journals Surface Modification of PVDF Membranes for Treating Produced Waters by Direct Contact Membrane Distillation

2019 ◽  
Vol 16 (5) ◽  
pp. 685 ◽  
Author(s):  
Mohanad Kamaz ◽  
Arijit Sengupta ◽  
Ashley Gutierrez ◽  
Yu-Hsuan Chiao ◽  
Ranil Wickramasinghe
Keyword(s):  
Surface Modification ◽  
Surface Properties ◽  
Direct Contact ◽  
Produced Water ◽  
Surface Oxidation ◽  
Membrane Distillation ◽  
Mineral Salts ◽  
Microscopy Imaging ◽  
Pvdf Membrane ◽  
Direct Contact Membrane Distillation

Direct contact membrane distillation (DCMD) has been conducted to treat hydraulic fracturing-produced water using polyvinylidenedifluoride (PVDF) membranes. Tailoring the surface properties of the membrane is critical in order to reduce the rate of adsorption of dissolved organic species as well as mineral salts. The PVDF membranes have been modified by grafting zwitterion and polyionic liquid-based polymer chains. In addition, surface oxidation of the PVDF membrane has been conducted using KMnO4 and NaOH. Surface modification conditions were chosen in order to minimize the decrease in contact angle. Thus, the membranes remain hydrophobic, essential for suppression of wetting. DCMD was conducted using the base PVDF membrane as well as modified membranes. In addition, DCMD was conducted on the base membrane using produced water (PW) that was pretreated by electrocoagulation to remove dissolved organic compounds. After DCMD all membranes were analyzed by scanning electron microscopy imaging as well as Energy-Dispersive X-Ray spectroscopy. Surface modification led to a greater volume of PW being treated by the membrane prior to drastic flux decline. The results indicate that tailoring the surface properties of the membrane enhances fouling resistance and could reduce pretreatment requirements.

Surfactant effects on water recovery from produced water via direct-contact membrane distillation

2017 ◽  
Vol 528 ◽  
pp. 126-134 ◽  
Author(s):  
Nick Guan Pin Chew ◽  
Shanshan Zhao ◽  
Chun Heng Loh ◽  
Nadia Permogorov ◽  
Rong Wang
Keyword(s):  
Direct Contact ◽  
Produced Water ◽  
Membrane Distillation ◽  
Water Recovery ◽  
Direct Contact Membrane Distillation ◽  
Surfactant Effects
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