Possibilities of the dead-end ultrafiltration in hard water treatment

Autor:	A.A. Kavitskaya
Rok vydání:	2004
Předmět:	Chromatography Aqueous solution Chemistry Mechanical Engineering General Chemical Engineering Hard water Ultrafiltration General Chemistry Membrane technology Membrane Volume (thermodynamics) Chemical engineering General Materials Science Water treatment Scaling Water Science and Technology
Zdroj:	Desalination. 168:341-346
ISSN:	0011-9164
DOI:	10.1016/j.desal.2004.07.017
Popis:	Comparative investigations of premodified and unmodified membranes were conducted in the process of deadend ultrafiltration of solutions featuring high calcium hardness. It was shown that application of membranes subjected to preliminary modification by filtering under pressure of Na-CMC aqueous solution to treat waters having the initial CaSO4 hardness of 56 mg-eq/1 in the absence of a scaling inhibitor facilitates the reduced formation of CaSO4 scale on membranes, while the introduction of an inhibitor to the solution subjected to filtering enables us to reduce the inhibitor effective concentration by a factor of 4 and increase the time of scale free service of membranes by a factor of 1.5. In this case the complete recovery of volume flux of membranes can be achieved by simple flushing with water.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cbdcf38930516299cf278878aa40effa https://doi.org/10.1016/j.desal.2004.07.017 Zobrazit plný text záznamu Full Text from ScienceDirect