Comparison of the performances of two commercial membranes in hardness removal from underground water using Nanofiltration membranes
Abstract
In this works, the comparison of the performances of two commercial membranes in hardness removal by nanofiltration in continuous mode was investigated from synthetic ground water of Maâmoura doped for various concentrations of TH (CaCl2, MgCl2).
The experiments were carried out in the pressure range of 6–40 bars. Analyses of the samples, and permeates at different pressures, were performed and the effects of the trans-membrane pressure on the permeate flux and salt rejection were studied. Also the study presents the effect of salinity of the performances of two tested membranes (NF90 and NF270).
Many configurations were tested: simple pass, double pass with one type of membranes and combination of two types of membranes. The pilot used (supplied by the French Company TIA) is an industrial nanofiltration pilot plant having two modules equipped with various spiral commercial membranes with an area of 7.6 m2.
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References
[1] N.; Kabay, M.; Demircioglu, E. Ersöz, I.; Kurucaovali, Removal of calcium and magnesium hardness by electrodialysis. Desalination 149 343–349, 2002
[2] A Bannoud,. Elimination de la dureté et des sulfates contenus dans les eaux par nanofiltration. Desalination 137 (2001) 133–139
[3] W. J. Conlon,; C. D.; Hornburg, , B. M. Watson; C. A. Kiefer,; Membrane softening: the concept and its application to municipal water supply,Desalination, 78, 157, 1990.
[4] D.L.; Comstock, Desal-5 membrane for water softening, Desalination, 76, 61, 1989.
[5] L.P. Raman; M.; Cheryan, N. Rajagopalan, Consider nanofiltration for membrane separation.Chem. Eng. Prog.1994, 90, 68–74.
View more references (9)
[6] P. Eriksson, Nanofiltartion extends the range of membrane filtration. Environ. Prog., 7,58–61, 1988.
[7] J. Schaep,; B. van der Bruggen,; S Uytterhoeven,.; R. Croux,; C. Vandecasteele,; D. Wilms,;, E. van Houtte; F Vanlerberghe,. Removal of hardness from groundwater by nanofiltration. Desalination, 119, 295–302, 1998.
[8] A Gorenflo; D. Velazquez-Padron,; F.H. Frimmel, Nanofiltration of a German Goundwater of high hardness and NOM content: Performance and coast. Desalination, 151, 253–265, 2002.
[9] S. Ghizellaoui,; S.; Taha, G.; Dorange, A. Chibani,; J Gabon,. Softening of Hamma drinking water by nanofiltration and by lime in the presence of heavy metals. Desalination 171, 133–138, 2004.
[10] C.M. Galanakis,; G.; Fountoulis, V. Gekas, Nanofiltration of brackish groundwater by using a polypiperazine membrane. Desalination, 286, 277–284, 2012.
[11] F. Elazhar; N. El Harrak,. Z. Abedelali, M, El Amrani., M.Taky., A Elmidaoui., Technical and economical comparison of the nanofiltration and reverse osmosis membranes in the brackish water desalination, Chemical technology, An Indian Journal, 7, pp 29-33 , 2012
[12] F. Elazhar; M Elamrani., M, Taky. M, Hafsi. A Elmidaoui. Performances of nanofiltration and reverse osmosis membranes in desalination of M’nasra Brackish water: Comparison under running conditions, International Journal of Environmental Sciences Volume 3 No.2, 2013
[13] A. El midaoui; M.A.M., Sahli .M. Tahaikt,. L., Chay M. Taky., M., Elmghari..M Hafsi. Selective nitrate removal by coupling electrodialysis and bioreactor, Journal of Desalination, 153, pp 389-397,2002 .
[14] A. El midaoui.; F. Lutin.L; ; Chay M.; Taky.. M. Tahaikt; .My R . Aloui Hafidi Removal of melassigenic ions for beet sugar syrups by electrodialysis, Journal of Desalination, 148, pp 143-148, 2002.