The Estimation of Feed Solution Composition Influence on Concentration Polarization Layer Resistance during Reverse Osmosis

Author(s): Huliienko S. V.^1*, Protsiuk O. O.¹, Gatilov K. O.², Kaminskyi V. S.^{1, 3}

Affiliation(s):
¹National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Peremohy Ave., 03056 Kyiv, Ukraine;
² Archer Daniels Midland Company ADM Europoort B.V., 125 Elbeweg, 3198 LC, Rotterdam, Netherlands;
³Technical University of Kosice, 9 Letna St., 042 00 Kosice, Slovak Republic

^*Corresponding Author’s Address: [email protected]

Issue: Volume 6; Issue 2 (2019)

Dates:
Paper received: May 14, 2019
The final version of the paper received: August 29, 2019
Paper accepted online: September 3, 2019

Citation:
Huliienko S. V., Protsiuk O. O., Gatilov K. O., Kaminskyi V. S. (2019). The estimation of feed solution composition influence on concentration polarization layer resistance during reverse osmosis. Journal of Engineering Sciences, Vol. 6(2), pp. F24-F29, doi: 10.21272/jes.2019.6(2).f4.

DOI: 10.21272/jes.2019.6(2).f4

Research Area: CHEMICAL ENGINEERING: Processes in Machines and Devices

Abstract. The experimental determination of concentration polarization layer resistance during reverse osmosis of mineral salts solutions was carried out with the aim to estimate the influence of solution composition on the value of mentioned resistance. In experimental conditions, the membrane resistance remains constant (the mean value was 0.534·10¹⁴ m^-1) which means that the membrane compaction was not observed. Moreover, under experimental conditions, the hypothesis about linear dependence between the concentration polarization layer and applied pressure was confirmed for all solutions under investigations. It was defined that value of concentration polarization layer resistance different salt solutions was varied less than 10 % although under experimental conditions the diffusion coefficient values of magnesium sulfate were more than three times higher than corresponded values for other salts. The increasing of solutions concertation determines the increasing of concentration polarization layer resistance. At the same time, in previous study it was defined that changes in hydrodynamic regime in membrane module under similar conditions could determine the change in concentration polarization layer resistance in 3–5 times, while in both studies the trends of impact of hydrodynamic conditions still similar to the value of considered resistance decrease with Reynolds number increasing. Such results showed that in considered range of concentrations the hydrodynamic conditions have a lower influence on concentration polarization layer resistance than solution composition. The obtained results are in agreement with the film theory of concentration polarization.

Keywords: membrane, reverse osmosis, concentration polarization, diffusion coefficient, Reynolds number, Schmidt number.

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