Effect of different physical conditions on fouling control in in-situ chemical cleaning in place (CIP) for flat sheet membranes fouled by secondary effluents

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

12 Scopus Citations
View graph of relations

Author(s)

  • Eui-Jong Lee
  • Young-Hoon Kim
  • Chang-Ha Lee
  • Hyung-Soo Kim
  • Hyung-Sook Kim

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)128-136
Journal / PublicationChemical Engineering Journal
Volume302
Publication statusPublished - 15 Oct 2016

Abstract

Although microfiltration (MF) system has been employed as pretreatment for reclamation, the MF process is prone to irreversible fouling by secondary effluents as feed. In particular, flat sheet (FS) membrane has trouble in controlling fouling due to restriction of backwashing. In this study, in-situ CIP (NaOCl 300, 600, 1200 mg/L) was applied to fouled membranes by secondary effluents with different physical conditions (idle, aeration, microbubble) and evaluated via examination of detached foulants (or fouled membrane) and continuous membrane process. The in-situ CIP with microbubble, the most effective method, showed cleaning efficiencies from 32.6% to 81.9% depending on operating conditions. Although microbubble could not induce hydraulic shear stress, it removed particulates and colloids on the membrane surface effectively. In addition, it influenced the structure of fouling layers. Moreover, in-situ CIP with microbubble retarded the increase of fouling resistances and controlled irreversible fouling compared to in-situ CIP with aeration.

Research Area(s)

  • Flat sheet (FS) membrane, In-situ cleaning in place (CIP), Membrane fouling, Microbubble, Reclamation

Citation Format(s)

Effect of different physical conditions on fouling control in in-situ chemical cleaning in place (CIP) for flat sheet membranes fouled by secondary effluents. / Lee, Eui-Jong; Kim, Young-Hoon; Lee, Chang-Ha; Kim, Hyung-Soo; Kim, Hyung-Sook.

In: Chemical Engineering Journal, Vol. 302, 15.10.2016, p. 128-136.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review