Diagnosis of fouling problems of NF and RO membrane installations by a quick scan

Johannes Vrouwenvelder*, D. van der Kooij

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Controlling fouling of membrane filtration installations (nanofiltration and reverse osmosis) is a major challenge for the water industry. Fouling affects the plant performance and increases the costs of plant operation. Diagnosis of the type(s) and extent of fouling is the essential first step for controlling fouling in order to maintain plant performance. A quick scan of the installation for the diagnosis of fouling involves an on-site study of a membrane element (autopsy), including evaluation of data of pretreatment. Comparison of the results of the quick scan with the database with results of autopsies related to plant performance (NPD, MTC), chemicals dosed (e.g. scale inhibitor) would show whether fouling is present and elucidates the types and extent of fouling present. The database also enables the evaluation of the risk on biofouling. Diagnosis of the type of fouling enables directed and more effective actions for prevention and control of (bio)fouling. Studies at (pilot) plants showed that operational problems can be caused by other types of fouling than expected for and that dosed chemicals can pose a risk for (bio) fouling. These case studies emphasize the significance of diagnosis of the type of fouling. Also, tools for prevention and prediction and studying the effect of cleaning strategies on fouling are presented.

Original languageEnglish (US)
Pages (from-to)121-124
Number of pages4
JournalDesalination
Volume153
Issue number1-3
DOIs
StatePublished - Feb 10 2003

Keywords

  • Autopsy
  • Biofouling
  • Diagnosis
  • Drinking water
  • Fouling
  • Membranes
  • Nanofiltration
  • Reverse osmosis
  • Scaling

ASJC Scopus subject areas

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

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