Intermittent chlorination shifts the marine biofilm population on reverse osmosis membranes

Dawoon Jeong, Chang Ha Lee, Seockheon Lee, Hyokwan Bae

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The influence of chlorine on marine bacterial communities was examined in this study. A non-chlorine-adapted marine bacterial community (NCAM) and a chlorine-adapted bacterial community (CAM, bacterial community treated with 0.2 mg-Cl2/L chlorine) were cultivated for 1 month. A distinct difference was observed between the NCAM and CAM, which shared only eight operational taxonomic units (OTUs), corresponding to 13.1% of the total number of identified OTUs. This result suggested that chlorine was responsible for the changes in the marine bacterial communities. Kordiimonas aquimaris was found to be a chlorine-resistant marine bacterium. The effect of intermittent chlorination on the two marine biofilm communities formed on the reverse osmosis (RO) membrane surface was investigated using various chlorine concentrations (0, 0.2, 0.4, 0.6 and 0.8 mg Cl2/L). Although the average number of adherent marine bacteria on the RO membrane over a period of 7 weeks decreased with increasing chlorine concentration, disinfection efficiencies showed substantial fluctuations throughout the experiment. This is due to chlorine depletion that occurs during intermittent chlorination. These results suggest that intermittent chlorination is not an effective disinfection strategy to control biofilm formation.

Original languageEnglish
Pages (from-to)395-404
Number of pages10
JournalMembrane Water Treatment
Volume10
Issue number6
DOIs
Publication statusPublished - 2019 Nov

Bibliographical note

Publisher Copyright:
© 2019 Techno-Press, Ltd.

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Water Science and Technology

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