Experimental and numerical study of air-gap membrane distillation (AGMD): Novel AGMD module for Oxygen-18 stable isotope enrichment

2017 ◽  
Vol 322 ◽  
pp. 667-678 ◽  
Author(s):  
Ehsan Karbasi ◽  
Javad Karimi-Sabet ◽  
Jamshid Mohammadi-Rovshandeh ◽  
Mohammad Ali Moosavian ◽  
Hossein Ahadi ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Numerical Study ◽  
Membrane Distillation ◽  
Air Gap ◽  
Isotope Enrichment ◽  
Air Gap Membrane Distillation ◽  
Stable Isotope Enrichment

scholarly journals Treatment of RO brine from CSG produced water by spiral-wound air gap membrane distillation — A pilot study

Desalination ◽  
2015 ◽  
Vol 366 ◽  
pp. 121-129 ◽  
Author(s):  
Hung C. Duong ◽  
Allan R. Chivas ◽  
Bart Nelemans ◽  
Mikel Duke ◽  
Stephen Gray ◽  
...  
Keyword(s):  
Pilot Study ◽  
Produced Water ◽  
Membrane Distillation ◽  
Air Gap ◽  
Air Gap Membrane Distillation ◽  
Spiral Wound

scholarly journals Design study of the coupling of an air gap membrane distillation unit to an air conditioner

Desalination ◽  
2017 ◽  
Vol 420 ◽  
pp. 308-317 ◽  
Author(s):  
Ahmadou Tidiane Diaby ◽  
Paul Byrne ◽  
Patrick Loulergue ◽  
Béatrice Balannec ◽  
Anthony Szymczyk ◽  
...  
Keyword(s):  
Membrane Distillation ◽  
Air Gap ◽  
Distillation Unit ◽  
Air Conditioner ◽  
Design Study ◽  
Air Gap Membrane Distillation

scholarly journals Air-gap membrane distillation as a one-step process for textile wastewater treatment

2019 ◽  
Vol 360 ◽  
pp. 1330-1340 ◽  
Author(s):  
Sebastian Leaper ◽  
Ahmed Abdel-Karim ◽  
Tarek A. Gad-Allah ◽  
Patricia Gorgojo
Keyword(s):  
Wastewater Treatment ◽  
Textile Wastewater ◽  
Membrane Distillation ◽  
Air Gap ◽  
Step Process ◽  
Air Gap Membrane Distillation ◽  
One Step ◽  
Textile Wastewater Treatment

scholarly journals A Comparison Study of Brine Desalination using Direct Contact and Air Gap Membrane Distillation

2019 ◽  
Vol 25 (11) ◽  
pp. 47-54
Author(s):  
Ahmed Shamil Khalaf ◽  
Asrar Abdullah Hassan
Keyword(s):  
Flow Rate ◽  
Direct Contact ◽  
Polyvinylidene Fluoride ◽  
Membrane Distillation ◽  
Air Gap ◽  
Feed Flow Rate ◽  
Permeate Flux ◽  
Air Gap Membrane Distillation ◽  
Flat Sheet ◽  
Feed Temperature

Membrane distillation (MD) is a hopeful desalination technique for brine (salty) water. In this research, Direct Contact Membrane Distillation (DCMD) and  Air Gap Membrane Distillation (AGMD) will be used. The sample used is from Shat Al –Arab water (TDS=2430 mg/l). A polyvinylidene fluoride (PVDF) flat sheet membrane was used as a flat sheet form with a plate and frame cell. Several parameters were studied, such as; operation time, feed temperature, permeate temperature, feed flow rate. The results showed that with time, the flux decreases because of the accumulated fouling and scaling on the membrane surface. Feed temperature and feed flow rate had a positive effect on the permeate flux, while permeate temperature had a reverse effect on permeate flux. It is noticeable that the flux in DCMD is greater than AGMD, at the same conditions. The flux in DCMD is 10.95LMH, and that in AGMD is 7.14 LMH.  In AGMD, the air gap layer made a high resistance. Here the temperature transport reduces in the permeate side of AGMD due to the air gap resistance. The heat needed for AGMD is lower than DCMD, this leads to low permeate flux because the temperature difference between the two sides is very small, so the driving force (vapor pressure) is low.                                                                                               

Modeling of Air-Gap Membrane Distillation and Comparative Study with Direct Contact Membrane Distillation

2020 ◽  
Vol 59 (50) ◽  
pp. 21930-21947
Author(s):  
Sadaf Noamani ◽  
Shirin Niroomand ◽  
Masoud Rastgar ◽  
Mehdi Azhdarzadeh ◽  
Mohtada Sadrzadeh
Keyword(s):  
Comparative Study ◽  
Direct Contact ◽  
Membrane Distillation ◽  
Air Gap ◽  
Air Gap Membrane Distillation ◽  
Direct Contact Membrane Distillation

scholarly journals Experimental evaluation of two consecutive air-gap membrane distillation modules with heat recovery

2020 ◽  
Vol 20 (5) ◽  
pp. 1678-1691 ◽  
Author(s):  
Mostafa Abd El-Rady Abu-Zeid ◽  
Gamal ElMasry
Keyword(s):  
Water Temperature ◽  
Flow Rate ◽  
Heat Recovery ◽  
Waste Heat ◽  
Water Flow Rate ◽  
Membrane Distillation ◽  
Air Gap ◽  
Feed Water ◽  
System Productivity ◽  
Air Gap Membrane Distillation

Abstract Two rectangular modules with a total interior membrane surface area of 13.53 m2 were consecutively combined to evaluate the use of heat recovery in an air-gap membrane distillation (AGMD) system. Several operating inlet parameters including feed water temperature, mass water flow rate and salinity were investigated. The experimental results revealed that the performance of the system was improved by virtue of efficient heat recovery resulting from combining two AGMD membrane modules in series. Under optimal inlet operating parameters of cooling water temperature of 20 °C, salinity of 0.05% and flow rate of 3 l/min, the system productivity (Pp) increased up to 192.9%, 179.3%, 176.5% and 179.2%, and the thermal efficiency (ηth) by 261.5%, 232.6%, 239.4% and 227.3% at feed water temperatures of 45 °C, 55 °C, 65 °C and 75 °C, respectively. Concurrently, the specific waste heat input (Ew.h.i) decreased by 6.7%, 4.7%, 5.6% and 2.7% due to the efficient heat recovery. The results confirmed that heat recovery is an important factor affecting the AGMD system that could be improved by designing one of the two AGMD modules with polytetrafluoroethylene (PTFE) hollow fibers with a flow length shorter than the other one having a salt rejection rate of 99%.

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