Nanogel-based coating as an alternative strategy for biofilm control in drinking water distribution systems

Olga Sójka, Damla Keskin, Henny C. van der Mei, Patrick van Rijn*, Maria Cristina Gagliano

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
144 Downloads (Pure)

Abstract

Biofilm formation and detachment in drinking water distribution systems (DWDS) can lead to several operational issues. Here, an alternative biofilm control strategy of limiting bacterial adhesion by application of a poly(N-isopropylmethacrylamide)-based nanogel coating on DWDS pipe walls was investigated. The nanogel coatings were successfully deposited on surfaces of four polymeric pipe materials commonly applied in DWDS construction. Nanogel-coated and non-coated pipe materials were characterized in terms of their surface hydrophilicity and roughness. Four DWDS relevant bacterial strains, representing Sphingomonas and Pseudomonas, were used to evaluate the anti-adhesive performance of the coating in 4 h adhesion and 24 h biofilm assays. The presence of the nanogel coating resulted in adhesion reduction up to 97%, and biofilm reduction up to 98%, compared to non-coated surfaces. These promising results motivate further investigation of nanogel coatings as a strategy for biofilm prevention in DWDS.

Original languageEnglish
Pages (from-to)121-134
Number of pages14
JournalBiofouling
Volume39
Issue number2
DOIs
Publication statusPublished - 2023

Keywords

  • anti-adhesive coating
  • bacterial adhesion
  • biofilm
  • drinking water distribution
  • nanogels

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