Improving Performance Of Low Reverse Osmosis Pressure Systems By Intermittent Autoflushing

Widiasa, I Nyoman and SINAGA , Nazaruddin and Ariyanti, Dessy (2010) Improving Performance Of Low Reverse Osmosis Pressure Systems By Intermittent Autoflushing. Jurnal Teknik Kimia Indonesia, 9 (1). pp. 1-10. ISSN 1693-9433

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Abstract

Scaling formation on the membrane surface in the form of calcium carbonate, calcium sulphate, silica, and/or magnesium silicate is a main problem of the reverse osmosis (RO) application for upgrading low grade water. Scaling in RO system is generally controlled by softening the feed water, limiting the recovery and/or the addition of antiscalants which is impractical for household RO system. In this work, the feasibility of intermittent autoflushing to prevent scale formation in household RO systems was investigated. All experiments were carried out using commercially available RO membrane (CSM RE-1812LP) which operated for 6 hours under operating pressure 5 kg/cm2 and total recycle operating mode. Model solution of feed water contain CaCl2 and NaHCO3 were prepared to meet various LSI values in the range of 0 to 1.5. Duration and interval time of autoflush were in the range of 60 to 15 s and 5 to 60 min respectively. The results shown that the permeate flux of the system which operated using intermittent autoflushing relatively stable. It is emphasized that intermittent autoflushing may improve the performance of household reverse osmosis systems.

Item Type:Article
Uncontrolled Keywords: Autoflushing, scaling, physical cleaning, reverse osmosis
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Faculty of Engineering > Department of Mechanical Engineering
Faculty of Engineering > Department of Mechanical Engineering
ID Code:75945
Deposited By:Mr Nazaruddin Sinaga
Deposited On:29 Aug 2019 12:41
Last Modified:29 Aug 2019 12:41

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