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http://dx.doi.org/10.12989/mwt.2013.4.4.223

Osmotic membrane distillation with continuous regeneration of stripping solution by natural evaporation  

Gryta, Marek (West Pomeranian University of Technology, Szczecin, Institute of Chemical Technology and Environment Engineering)
Publication Information
Membrane and Water Treatment / v.4, no.4, 2013 , pp. 223-236 More about this Journal
Abstract
The paper presents an experimental set-up for osmotic membrane distillation, which can be operated continuously for several weeks. NaCl solutions were used as an osmotic solution. The influence of osmotic solution concentration on the obtained permeate flux is presented. The experimental set-up was equipped with a system for the regeneration of dilute brine. The regeneration was carried out using a method of natural evaporation to the air surrounding the installation. The evaporation area was created by the Białecki rings, assembled in the form of tower. The obtained evaporation rate was sufficient to maintain a constant NaCl concentration (over 300 g/L), for air with the relative humidity in the range of 30-80%. Accurel PP S6/2 hydrophobic polypropylene membranes were used in the study. The membranes exhibited 100% rejection for 600 h of the process duration.
Keywords
osmotic membrane distillation; osmotic solution; OMD pilot plant;
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