SHEN Yi,WANG Hai-bo,HU Chun,et al.Effect of Micro-pollutants on Bacterial Regrowth in Drinking Water Pipelines[J].China Water & Wastewater,2020,36(21 21):15-20.
Effect of Micro-pollutants on Bacterial Regrowth in Drinking Water Pipelines
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
21 21
Page:
15-20
Column:
Date of publication:
2020-11-01
- Keywords:
- micro-pollutant; bacterial regrowth; opportunistic pathogen; extracellular polymeric substances; antibiotic resistance gene
- Abstract:
- Effect of different micro-pollutants on the regrowth of free-living bacteria including pathogens was studied, based on the method of adding sulfadiazine and ciprofloxacin to the effluent of sand filtration in water treatment plant. Firstly, the addition of micro-pollutants decreased the amounts of Mycobacterium spp., Legionella spp., Legionella pneumophila and Pseudomonas aeruginosa. However, the amounts of 16S rRNA, Acanthamoeba spp., Hartmanella vermiformis and Mycobacterium avium increased. The amounts of these bacteria increased obviously, especially when sulfadiazine and ciprofloxacin were added to the water simultaneously. Moreover, the extracellular polymeric substances (EPS) and antibiotic resistance genes (ARGs) in the effluent of drinking water pipelines were also studied. The results indicated that the polysaccharide and protein in the EPS and ARGs including mexA, int1, sul1, sul2 and sul3 were the main factors for the increase of the bacterial amounts in the effluent. In order to effectively control the water quality of the pipelines, further measures should be conducted to remove the micro-pollutants in the source water.
Last Update:
2020-11-01