新旧铁管道配送系统之间的水质风险和微生物生态的全面比较
Youyi Chen1, Huishan Zhou1, Hui Gao2
1Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.
Journal of environmental sciences (China)
|July 5, 2024
概括
饮用水系统中腐蚀的铁管道增加了有害的三甲 (THM) 和抗生素耐药性基因 (ARG). 老化的管道会产生独特的微生物相互作用,影响水安全.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 水质工程 水质工程
背景情况:
- 饮用水分配系统 (DWDS) 面临着基础设施老化的挑战,特别是铁管道.
- 这些管道中的腐蚀会影响水质和系统内的微生物生态系统.
研究的目的:
- 研究铁管腐蚀对DWDS水质和微生物生态的影响.
- 了解管道年龄,腐蚀产品和三甲 (THM) 和抗生素耐药性基因 (ARG) 等污染物的流行之间的关系.
主要方法:
- 在旧和新DWDS之间对水质参数 (例如,腺三酸盐,THM,ARG) 的比较分析.
- 微生物社区分析和表征细胞外聚合物质 (EPS) 和生物膜结构.
- 研究铁颗粒,生物膜和残留之间的相互作用.
主要成果:
- 较旧的DWDS显示THM和ARG的度明显更高.
- 旧DWDS的废水含有较高的腺三酸盐水平,表明微生物活性较高.
- 旧系统中的EPS表现出增强的生物和降低的疏水性,铁颗粒稳定生物膜并促进THM形成.
- 腐蚀的管道改变了散装水中的微生物群落,并刺激了抗氧化剂反应,导致ARG增加.
结论:
- 铁管的腐蚀造成了生物膜,和腐蚀产品之间的复杂相互作用.
- 铁管道的年龄增长与水质波动和微生物生态的变化更大相关.
- 加强对老化DWDS中的水质和微生物动态的监测,对于确保自来水安全至关重要.
相关概念视频
Multiple Pipe Systems
738
Multipipe systems consist of complex configurations of interconnected pipes designed to transport fluids efficiently across intricate networks. They are essential in engineering applications requiring precise control over flow distribution, pressure, and head loss. They are categorized into series, parallel, loop, and network configurations, each distinguished by unique flow characteristics and applications.
Series Configuration
In a series configuration, fluid flows sequentially from one pipe...
Series Configuration
In a series configuration, fluid flows sequentially from one pipe...
738
Single Pipe Systems
123
In pipe flow analysis, problems are typically categorized into three types — Type I, Type II, and Type III — based on the known parameters and the desired outcome. Each type of problem addresses specific engineering requirements using fluid properties, pipe characteristics, and operational conditions.
In a Type I problem, fluid properties (density and viscosity), pipe characteristics (including diameter, length, and surface roughness), and the flow rate or average velocity are...
In a Type I problem, fluid properties (density and viscosity), pipe characteristics (including diameter, length, and surface roughness), and the flow rate or average velocity are...
123
General Characteristics of Pipe Flow I
1.1K
Pipe flow refers to the movement of fluids within fully enclosed conduits, typically cylindrical in shape, such as water pipes or hydraulic hoses. These conduits are designed to withstand high-pressure gradients that drive fluid movement, contrasting with open-channel flows, where gravity is the primary driving force. Rectangular conduits, like air conditioning and heating ducts, generally operate at lower pressures and are less suited for high-pressure applications.
The classification of fluid...
The classification of fluid...
1.1K
Design Example: Designing a Residential Plumbing System
671
The design of residential plumbing systems requires carefully evaluating water demand, flow rates, and pressure dynamics to ensure both efficiency and reliability. The nature of water flow within pipes is defined by its Reynolds number, which classifies flow as either laminar (smooth) or turbulent.
671
Major Losses in Pipes
1.1K
When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to...
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to...
1.1K
General Characteristics of Pipe Flow II
1.1K
When fluid enters a pipe, it first passes through the entrance region, where the velocity profile adjusts due to viscous effects. In this region, a boundary layer forms along the pipe walls and grows until it fully occupies the pipe's cross-section. Once the boundary layer merges, the flow becomes fully developed, with a steady velocity profile that remains consistent along the pipe's length.
The distance to reach a fully developed flow is called the entrance length and depends on the...
The distance to reach a fully developed flow is called the entrance length and depends on the...
1.1K


