The Modified Fouling Index Ultrafiltration constant flux for assessing particulate/colloidal fouling of RO systems

Sergio G. Salinas-Rodriguez, Gary L. Amy, Jan C. Schippers, Maria D. Kennedy

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Reliable methods for measuring and predicting the fouling potential of reverse osmosis (RO) feed water are important in preventing and diagnosing fouling at the design stage, and for monitoring pre-treatment performance during plant operation. The Modified Fouling Index Ultrafiltration (MFI-UF) constant flux is a significant development with respect to assessing the fouling potential of RO feed water. This research investigates (1) the variables influencing the MFI-UF test at constant flux filtration (membrane pore size, membrane material, flux rate); and (2) the application of MFI-UF into pre-treatment assessment and RO fouling estimation. The dependency of MFI on flux, means that to assess accurately particulate fouling in RO systems, the MFI should be measured at a flux similar to a RO system (close to 20 L/m2/h) or extrapolated from higher fluxes. The two studied membrane materials showed reproducible results; 10% for PES membranes and 6.3% for RC membranes. Deposition factors (amount of particles that remain on the surface of membrane) were measured in a full-scale plant ranging between 0.2 and 0.5. The concept of “safe MFI” is presented as a guideline for assessing pre-treatment for RO systems.
Original languageEnglish (US)
Pages (from-to)79-91
Number of pages13
JournalDesalination
Volume365
DOIs
StatePublished - Feb 18 2015

ASJC Scopus subject areas

  • Water Science and Technology
  • Materials Science(all)
  • Chemical Engineering(all)
  • Chemistry(all)
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'The Modified Fouling Index Ultrafiltration constant flux for assessing particulate/colloidal fouling of RO systems'. Together they form a unique fingerprint.

Cite this