Application of micellar enhanced ultrafiltration for nutrients removal

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The feasibility of micellar-enhanced ultrafiltration to remove nutrients, nitrate and phosphate, was investigated with a cationic surfactant, cetlypyridinium, chloride (CPC). The effects of surfactant molar ratios on the rejection of nitrate and phosphate and flux decline were studied. In the nitrate/phosphate/CPC system, as the molar ratio of nitrate: phosphate:CPC increased from 1:0.06:1.06 to 1:0.06:3.18 and to 1:0.06:5.30, the rejection of nitrate increased from 77% to 84% and to 92%, while phosphate rejection increased from 83% to 87% and 95%, respectively. The rejection of CPC increased as the molar ratio increased, and the concentration of CPC in the permeate was negligible because the size of the CPC micelle was lager than the pore size of the membrane, which indicated that the secondary pollution by surfactants might be insignificant. The reduction of permeate flux induced by the addition of a surfactant was due to the gel layer formed on the surface of the membrane.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2003-08
Language
English
Article Type
Article; Proceedings Paper
Keywords

WATER

Citation

DESALINATION, v.156, no.1-3, pp.137 - 144

ISSN
0011-9164
URI
http://hdl.handle.net/10203/84808
Appears in Collection
CBE-Journal Papers(저널논문)
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