Improving mixing and renewal in drinking water storage tanks: lessons learnt and practical measures

IF 1.6 3区环境科学与生态学 Q3 WATER RESOURCES

Urban Water Journal Pub Date : 2023-08-09 DOI:10.1080/1573062X.2023.2217433

A. Pinheiro, S. Vaz, L. Monteiro, M. Almeida, D. Covas

引用次数: 0

Abstract

ABSTRACT This paper investigates the effect of different types of structural and operational measures on water mixing and renewal time in circular and rectangular cross-section water storage tanks, aiming at a better understanding of the flow dynamics to find practicable solutions to improve their design, rehabilitation and operation. An experimental programme, including traditional tracer and dye tracer tests, was carried out in small-scale tanks for different configurations and operating conditions. Two tanks were tested with and without interior structures, with the inlet/outlet pipes at different locations and for constant and variable water level. The main findings are that: i) the most effective measure is operating with fill-and-draw cycles, however, for tanks operated nearly full structural measures are recommendable; ii) reducing the inlet pipe diameter and installing nozzles near the tank bottom improve the mixing conditions; iii) the use of baffles is recommendable when the inlet and outlet pipes are very close.

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改善饮用水储存罐的混合和更新:经验教训和实际措施

摘要:本文研究了不同类型的结构和运行措施对圆形和矩形截面储水罐水混合和更新时间的影响，旨在更好地了解流动动力学，为改进储水罐的设计、修复和运行找到可行的解决方案。一个实验方案，包括传统示踪剂和染料示踪剂测试，在不同配置和操作条件的小型储罐中进行。测试了两个有内部结构和没有内部结构的水箱，在不同的位置有入口/出口管道，恒定和可变水位。主要研究结果表明:1)最有效的措施是采用灌拔循环，但对于储罐，建议采用接近全结构的措施;Ii)减小进气管直径，在罐底附近安装喷嘴，改善混合条件;Iii)当进出口管道非常接近时，建议使用挡板。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Urban Water Journal WATER RESOURCES-

CiteScore

4.40

自引率

11.10%

发文量

101

审稿时长

3 months

期刊介绍： Urban Water Journal provides a forum for the research and professional communities dealing with water systems in the urban environment, directly contributing to the furtherance of sustainable development. Particular emphasis is placed on the analysis of interrelationships and interactions between the individual water systems, urban water bodies and the wider environment. The Journal encourages the adoption of an integrated approach, and system''s thinking to solve the numerous problems associated with sustainable urban water management. Urban Water Journal focuses on the water-related infrastructure in the city: namely potable water supply, treatment and distribution; wastewater collection, treatment and management, and environmental return; storm drainage and urban flood management. Specific topics of interest include: network design, optimisation, management, operation and rehabilitation; novel treatment processes for water and wastewater, resource recovery, treatment plant design and optimisation as well as treatment plants as part of the integrated urban water system; demand management and water efficiency, water recycling and source control; stormwater management, urban flood risk quantification and management; monitoring, utilisation and management of urban water bodies including groundwater; water-sensitive planning and design (including analysis of interactions of the urban water cycle with city planning and green infrastructure); resilience of the urban water system, long term scenarios to manage uncertainty, system stress testing; data needs, smart metering and sensors, advanced data analytics for knowledge discovery, quantification and management of uncertainty, smart technologies for urban water systems; decision-support and informatic tools;...