The relationship between membrane cleaning efficiency and water quality

被引：32

作者：

Tran-Ha, MH ^{[1
]}

Wiley, DE ^{[1
]}

机构：

[1] Univ New S Wales, UNESCO, Ctr Membrane Sci & Technol, Sch Chem Engn & Ind Chem, Sydney, NSW 2052, Australia

来源：

JOURNAL OF MEMBRANE SCIENCE | 1998年 / 145卷 / 01期

关键词：

ultrafiltration; membrane cleaning; water quality; fouling;

D O I：

10.1016/S0376-7388(98)00053-2

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Impurities such as particulates and some dissolved salts present in the water used for cleaning of a polysulphone ultrafiltration membrane have been found to affect the efficiency of the cleaning. A cationic surfactant, CTAB (cetyltrimethyl-ammonium bromide), was used for membrane cleaning after ultrafiltration of a 0.1 wt% reconstituted whey protein solution. Colloidal-free water used for cleaning was doped with a known amount of the ions: calcium, sodium, chloride, nitrate and sulphate. The presence of calcium in water, at the usual concentrations found in tap water, did not greatly affect cleaning efficiency while chloride was found to reduce cleaning efficiency. Sodium, nitrate and sulphate appeared to improve the flux recovery during membrane cleaning. The cleaning efficiency was also improved at higher ionic strengths. Calculations were carried out to demonstrate that the differences were statistically significant. (C) 1998 Elsevier Science B.V.

引用

页码：99 / 110

页数：12