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.
|Number of pages||10|
|Journal||Membrane Water Treatment|
|Publication status||Published - 2019 Nov|
Bibliographical noteFunding Information:
The authors acknowledge the financial support of the Korea Institute of Science and Technology (2Z04140). This research was supported by a grant (code 17IFIP-B065893-05) from the Industrial Facilities & Infrastructure Research Program funded by the Ministry of Land, Infrastructure, and Transport of the Korean government. This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry Education (NRF-2018R1D1A1B07050389).
© 2019 Techno-Press, Ltd.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Water Science and Technology