Early non-destructive biofouling detection and spatial distribution: Application of oxygen sensing optodes

Amber Siddiqui, Marc Staal, Amber Siddiqui, S.M. Borisov, Szilard Bucs, Johannes S. Vrouwenvelder

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Biofouling is a serious problem in reverse osmosis/nanofiltration (RO/NF) applications, reducing membrane performance. Early detection of biofouling plays an essential role in an adequate anti-biofouling strategy. Presently, fouling of membrane filtration systems is mainly determined by measuring changes in pressure drop, which is not exclusively linked to biofouling. Non-destructive imaging of oxygen concentrations (i) is specific for biological activity of biofilms and (ii) may enable earlier detection of biofilm accumulation than pressure drop. The objective of this study was to test whether transparent luminescent planar O2 optodes, in combination with a simple imaging system, can be used for early non-destructive biofouling detection. This biofouling detection is done by mapping the two-dimensional distribution of O2 concentrations and O2 decrease rates inside a membrane fouling simulator (MFS). Results show that at an early stage, biofouling development was detected by the oxygen sensing optodes while no significant increase in pressure drop was yet observed. Additionally, optodes could detect spatial heterogeneities in biofouling distribution at a micro scale. Biofilm development started mainly at the feed spacer crossings. The spatial and quantitative information on biological activity will lead to better understanding of the biofouling processes, contributing to the development of more effective biofouling control strategies.
Original languageEnglish (US)
Pages (from-to)10-20
Number of pages11
JournalWater Research
Volume83
DOIs
StatePublished - Jun 13 2015

ASJC Scopus subject areas

  • Water Science and Technology
  • Pollution
  • Ecological Modeling
  • Waste Management and Disposal

Fingerprint Dive into the research topics of 'Early non-destructive biofouling detection and spatial distribution: Application of oxygen sensing optodes'. Together they form a unique fingerprint.

Cite this