宾馆建筑热水系统内军团菌的存在水平及归趋研究  

Level and Trend of Legionella in Hotel Hot Water System

作　　者：杨文畅 李伟英[1,2] 黄圣洁 陈继平 YANG Wen-chang;LI Wei-ying;HUANG Sheng-jie;CHEN Ji-ping(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Yangtze River Water Environment,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]同济大学长江水环境教育部重点实验室,上海200092

出　　处：《中国给水排水》2021年第1期34-39,共6页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51979194);中国工程院院地合作项目(2019-CQ-ZD-1)。

摘　　要：建筑热水供应系统是建筑给水系统的重要组成部分,其水质安全与民众健康息息相关。对我国华东地区一所宾馆的热水系统进行了一年的水质监测,借助分子生物学、Mi Seq高通量测序技术,探究水中军团菌存在水平、影响因素及其归趋特点。结果表明,该宾馆热水系统存在军团菌感染风险。研究期间军团菌检出率为100%,检出浓度为2. 27×10^(3)~4. 12×10^(5)copies/m L,占细菌总数的比例为0. 28%~38. 11%。军团菌浓度与季节间具有显著相关性,夏季高于其他季节,除冬季外其余季节各采样点军团菌浓度较为相近。建筑热水系统对微生物具有筛选富集作用。水中军团菌浓度与浊度、DOC呈显著正相关性,与p H值呈显著负相关性,可通过降低浊度和有机物浓度、满足水质标准前提下合理调控pH值等措施控制军团菌增殖,保障水质安全。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 Mi Seq highthroughput 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 was100%,and the detected concentration was between 2. 27 ×10^(3) copies/m L and 4. 12×10^(5) copies/m L,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.

关 键 词：宾馆 热水系统 军团菌 

分 类 号：TU991[建筑科学—市政工程]