YANG Wen-chang,LI Wei-ying,HUANG Sheng-jie,et al.Level and Trend of Legionella in Hotel Hot Water System[J].China Water & Wastewater,2021,37(1 1):34-39.
Level and Trend of Legionella in Hotel Hot Water System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
1 1
Page:
34-39
Column:
Date of publication:
2021-01-01
- Keywords:
- hotel; hot water system; Legionella
- Abstract:
- Building hot water supply system is an important part of building water supply system, and its water quality safety is closely related to public health. Water quality of a hot water system in a hotel in East China was monitored for one year. With the help of molecular biology and MiSeq high-throughput sequencing technology, the existing level, influencing factors and trend characteristics of Legionella in water were explored. The results showed that there was a risk of Legionella infection in the hotel hot water system. The detection rate of Legionella at the sampling points during the study period was 100%, and the detected concentration was between 2.27×103 copies/mL and 4.12×105 copies/mL, accounting for 0.28%-38.11% of the total bacteria. There was a significant correlation between the concentration of Legionella and the season. The concentration of Legionella in summer was higher than that in other seasons, and the concentrations at each sampling point were similar except in winter. The building hot water system had a selection and enrichment effect on microorganisms. The concentration of Legionella in water was positively correlated with turbidity and DOC, and negatively correlated with pH value. Therefore, Legionella proliferation could be controlled and water quality safety could be guaranteed by reducing turbidity and organic concentration and reasonably adjusting pH value under the premise of meeting water quality standards.
Last Update:
2021-01-01