[1]张海涵,刘祥,徐磊,等.夏季过夜滞留诱导室内管道饮用水细菌增殖特征[J].中国给水排水,2024,40(11):57-64.
　ZHANGHai-han,LIUXiang,XULei,et al.Characteristics of Bacterial Growth in Indoor Drinking Water Pipeline Induced by Summer Overnight Stagnation[J].China Water & Wastewater,2024,40(11):57-64.
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夏季过夜滞留诱导室内管道饮用水细菌增殖特征

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第11期 页码: 57-64 栏目: 出版日期: 2024-06-01
Title:
Characteristics of Bacterial Growth in Indoor Drinking Water Pipeline Induced by Summer Overnight Stagnation
作者:
张海涵1,2， 刘祥1,2， 徐磊1,2， 黄廷林1,2
（1.西安建筑科技大学环境与市政工程学院 陕西省环境工程重点实验室，陕西 西安 710055；2.西北水资源与环境生态教育部重点实验室，陕西 西安 710055）
Author(s):
ZHANG　Hai-han1，2， LIU　Xiang1，2， XU　Lei1，2， HUANG　Ting-lin1，2
（1. Shaanxi Key Laboratory of Environmental Engineering， School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China；2.Key Laboratory of Northwest Water Resource， Environment and Ecology ， Xi’an 710055， China）
关键词:
室内饮用水管道;  过夜滞留;  细菌增殖;  代谢活性;  结构方程
Keywords:
indoor drinking water pipeline;  overnight stagnation;  bacterial proliferation;  metabolic activity;  structural equation
摘要:
针对室内饮用水管道过夜滞留水水质的恶化问题，开展了系统性研究。6月—8月期间，每月对室内饮用水管道新鲜水与滞留水水质进行检测，采用流式细胞仪与三磷酸腺苷（ATP）对细菌数量及生物活性进行分析。结果表明，过夜滞留饮用水安全风险加剧，余氯浓度显著下降。6月、7月、8月滞留水NO2--N浓度范围分别为0~0.006、0~0.009和0~0.012 mg/L。相较于新鲜水，滞留水6月、7月、8月Fe浓度分别增加1.33、1.63和6.00 倍。经过滞留之后，细菌数和ATP浓度显著增加。滞留水细菌数分别为1.41×105、1.23×105和2.82×105 cells/mL，细菌总ATP浓度和胞内ATP浓度分别为7.97×10-12、3.91×10-12、12.80×10-12 g/mL和7.15×10-17、4.74×10-17、4.48×10-17 g/cell。结构方程模型分析表明，在滞留水和新鲜水中，温度对细菌数量与活性均起到显著正相关作用。滞留之后Fe对细菌数量的相关性由负相关转变为正相关，而细菌数量对细菌活性的正相关作用减弱。
Abstract:
This paper systematically investigated the deterioration of overnight water quality in indoor drinking water pipelines. From June to August, the monthly testing of fresh and stagnant water in indoor drinking water pipes was conducted, and the cell count and biological activity of bacteria were analyzed using flow cytometry and adenosine triphosphate (ATP). The risk of drinking water safety escalated after overnight stagnation. The residual chlorine in drinking water decreased significantly following stagnation. In June, July, and August, the nitrite nitrogen ranged from 0 mg/L to 0.006 mg/L, 0 mg/L to 0.009 mg/L, and 0 mg/L to 0.012 mg/L, respectively. In comparison to fresh water, the concentration of Fe in stagnant water increased by 1.33 times, 1.63 times and 6.00 times in June, July, and August respectively. Following stagnation, there was a significant increase in cell count and ATP concentration. The bacterial cell counts in stagnant water were 1.41×105 cells/mL, 1.23×105 cells/mL and 2.82×105 cells/mL, respectively. The total ATP concentration of bacteria and their intracellular ATP concentration were 7.97×10-12 g/mL, 3.91×10-12 g/mL, 12.80×10-12 g/mL and 7.15×10-17 g/cell, 4.74×10-17 g/cell, 4.48×10-17 g/cell, respectively. The structural equation model analysis revealed a significant positive correlation between temperature and the abundance and activity of bacteria in both stagnant water and fresh water. After stagnation, the relationship between Fe and bacterial cell counts shifted from negative to positive, while the positive correlation between bacterial cell counts and bacterial activity was attenuated.
更新日期/Last Update: 2024-06-01