TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Schwantes, Rebecca
A1  - Bauer, Lorenz
A1  - Chavan, Kirtiraj
A1  - Dücker, Dennis
A1  - Felsmann, Clemens
A1  - Pfafferott, Jens
T1  - Air gap membrane distillation for hypersaline brine concentration: Operational analysis of a full-scale module–New strategies for wetting mitigation
JF  - Desalination
N2  - Membrane distillation (MD) is a thermal separation process which possesses a hydrophobic, microporous
membrane as vapor space. A high potential application for MD is the concentration of hypersaline brines, such as
e.g. reverse osmosis retentate or other saline effluents to be concentrated to a near saturation level with a Zero
Liquid Discharge process chain. In order to further commercialize MD for these target applications, adapted MD
module designs are required along with strategies for the mitigation of membrane wetting phenomena. This
work presents the experimental results of pilot operation with an adapted Air Gap Membrane Distillation
(AGMD) module for hypersaline brine concentration within a range of 0–240 g NaCl /kg solution. Key performance
indicators such as flux, GOR and thermal efficiency are analyzed. A new strategy for wetting mitigation
by active draining of the air gap channel by low pressure air blowing is tested and analyzed. Only small reductions
in flux and GOR of 1.2% and 4.1% respectively, are caused by air sparging into the air gap channel.
Wetting phenomena are significantly reduced by avoiding stagnant distillate in the air gap making the air blower
a seemingly worth- while additional system component.
KW  - Membrane distillation Wetting mitigation Brine concentration Draw solution recovery
Y1  - 2018
U6  - https://doi.org/10.1016/j.desal.2018.06.012
DO  - https://doi.org/10.1016/j.desal.2018.06.012
IS  - 444
SP  - 13
EP  - 25
PB  - Elsevier
ER  -