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Water
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Drinking Water Pipe Network and Water Quality Safety
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Drinking Water Pipe Network and Water Quality Safety

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 8198

Special Issue Editor

Dr. Yongji Zhang

E-Mail Website
Guest Editor
College of Environmental Science and Engineering, Tongji University, Shanghai, China
Interests: water treatment; water and wastewater disinfection; drinking water distribution system safety; advanced treatment for water and wastewater; membrane science and technology

Special Issue Information

Dear Colleagues,

The water quality safety of drinking water distribution systems has always been a hot spot since people's demand for a better life has increased. The pipeline materials, biofilm on the pipe wall, the type and quantity of microorganisms in the water, and the concentration of residual disinfectants affect the water quality of drinking water distribution systems. Research on the biofilm on pipe walls and the influence of factors such as biofilm characteristics, microbial change laws, and pipe materials can provide an effective reference for the control of water quality in water distribution systems.

In recent years, with the improvement in water quality standards, and the application of new treatment technologies and new pipe materials, the requirements for water quality in drinking water distribution systems have continued to increase; thus, understanding how to improve the water quality is an important issue for researchers.

The purpose of this Special Issue is to systematically discuss problems that appear in drinking water distribution systems, summarize their regularity, and propose practical and feasible control methods.

Authors with expertise in drinking water distribution systems and water quality safety are cordially invited to submit their manuscripts to this Special Issue. Significant original papers and critical review articles are welcomed.

Topics of interest include, but are not limited to, the following:

  • Biofilms in drinking water distribution systems;
  • Metal ion release from pipe materials;
  • Monitoring and control of biofilms;
  • Microbial community structure in biofilms;
  • Pipeline corrosion.

Dr. Yongji Zhang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • water treatment
  • disinfection
  • biofilm
  • pipeline
  • distribution system
  • bacteria
  • water quality

Published Papers (4 papers)

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Research

11 pages, 3780 KiB  
Article
Effect of Particulate Matter on Biofilm Stability in a Water Supply Network
by Zhiling Zhao, Lu Wang, Xiyu Sun and Tianneng Lai
Water 2023, 15(8), 1582; https://doi.org/10.3390/w15081582 - 18 Apr 2023
Viewed by 999
Abstract
The safety of water supply networks has always been a concern. The biofilm attached on the pipes will fall into pipe water when disturbed, which is a potential threat to human health. Particulate matter can contain bacteria, and most bacteria in water will [...] Read more.
The safety of water supply networks has always been a concern. The biofilm attached on the pipes will fall into pipe water when disturbed, which is a potential threat to human health. Particulate matter can contain bacteria, and most bacteria in water will adhere to the surface of particulate matter, are not easy to kill using disinfectants. Therefore, the effect of particulate matter and extracellular polymeric substances (EPS) on the stability of biofilm was investigated. This study revealed that biofilm without particulate matter had the highest biomass, at an order of magnitude higher than biofilm with particulate matter and bacteria, while biofilm with abundant particulate matter and bacteria were more stable. The effect of shear stress on the biofilm attached on the pipes was investigated through rotational speed experiments, and the results implied that the collision between bacterial polymers increased with an increase in rotational speed and the formation of stale biofilm adhered inside the pipes. Further, instead of protein and fatty chains, the hydroxyl bonds played vital roles in the combination of particulate matter and EPS. Full article
(This article belongs to the Special Issue Drinking Water Pipe Network and Water Quality Safety)
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9 pages, 2583 KiB  
Article
Study on the Adsorption Relationship between Organic Matter and Particulate Matter in Water Distribution Pipes
by Zhiling Zhao, Lu Wang, Dongdong Wang and Tianneng Lai
Water 2023, 15(5), 859; https://doi.org/10.3390/w15050859 - 23 Feb 2023
Viewed by 1575
Abstract
In the process of water distribution, the secondary pollution of drinking water cannot be ignored. There are many organic substances in the water supply network, some of which exist in a dissolved state in the water as dissolved organic matter (DOM), and some [...] Read more.
In the process of water distribution, the secondary pollution of drinking water cannot be ignored. There are many organic substances in the water supply network, some of which exist in a dissolved state in the water as dissolved organic matter (DOM), and some of which are adsorbed on the particulate matter to form particulate organic matter (POM). With the flow of water, the particles will be brought into the end user, and threaten the life and health of the user. In this study, two forms of organic matter in distributed water were comprehensively analyzed through micro-filtration membrane filtration, ultrasonic extraction, C18 column solid phase extraction, and GC-MS detection, and their changes in the flow process were explored. The results show that, as the sampling point moves away from the water source, the DOM decreases and the POM increases, and in all there were fewer DOM species than POM, indicating that more organic matter existed on particulate matter or in particle form, and relatively less organic matter existed in a dissolved state. POM in water mainly includes alcohol, ketone, ester, nitrogen, sulfur compounds, and benzene, and the content of POM in different particle size ranges is not the same. Some small particle size ranges have a higher content of POM, while some large particle size ranges have a higher content of POM, which does not show obvious regularity. Full article
(This article belongs to the Special Issue Drinking Water Pipe Network and Water Quality Safety)
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17 pages, 3984 KiB  
Article
Quality Characterization of Groundwater for Drinking Purposes and Its Network Distribution to Assure Sustainability in Southern Region of Saudi Arabia
by Saad M. Alramthi, Gamila H. Ali, Ahmed M. Shaban, Tarek A. Abdou, Atiah M. Elthagafi, Saad H. Eldosari, Bao-Ku Zhu and Hosam M. Safaa
Water 2022, 14(21), 3565; https://doi.org/10.3390/w14213565 - 6 Nov 2022
Cited by 4 | Viewed by 3089
Abstract
Water demand per capita will rise in the Arab world as a result of climate change and population expansion. One of the most important aims in coping with population increase around the world is to conserve water supplies. As a result, the Kingdom [...] Read more.
Water demand per capita will rise in the Arab world as a result of climate change and population expansion. One of the most important aims in coping with population increase around the world is to conserve water supplies. As a result, the Kingdom of Saudi Arabia (KSA) constructed the Al Wajeed Water Treatment System to meet the demands of its southern population. This research aims to assess the drinking water quality produced from the Al Wajeed Water Treatment System. Monthly water samples were collected (January 2018 to January 2021) from the Al Wajeed Water Treatment Framework (4 sites), extending to governorates, Bishah`s distribution system (5 sites), and Tathleeth`s distribution system (7 sites). Water quality criteria, such as physical-, chemical-, and microbiological-parameters, revealed that the majority of water samples collected from the Al Wajeed Water Framework and its environs are of a good quality and matched the national and International standards. Few sites showed water quality criteria such as turbidity, fluoride, and total coliform, which did not comply with national and global standards. The obtained results explained the importance of monitoring and follow-up programs for drinking water criteria. In addition, they can help the authorities and stakeholders in the sustainable development. Full article
(This article belongs to the Special Issue Drinking Water Pipe Network and Water Quality Safety)
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17 pages, 3109 KiB  
Article
Mechanism of Biofilm Formation on Installation Materials and Its Impact on the Quality of Tap Water
by Dorota Papciak, Andżelika Domoń, Monika Zdeb, Barbara Tchórzewska-Cieślak, Janusz Konkol and Eleonora Sočo
Water 2022, 14(15), 2401; https://doi.org/10.3390/w14152401 - 2 Aug 2022
Cited by 4 | Viewed by 1760
Abstract
In the conducted study, an attempt was made to verify and evaluate the impact of the biofilm formed on the surfaces of the installation material on the quality and sanitary safety of tap water reaching the consumer. For biofilm studies, fractal analysis and [...] Read more.
In the conducted study, an attempt was made to verify and evaluate the impact of the biofilm formed on the surfaces of the installation material on the quality and sanitary safety of tap water reaching the consumer. For biofilm studies, fractal analysis and quantitative bacteriological analysis were used. The quality of tap water flowing through the experimental installation (semi-technical scale) was determined using physicochemical and microbiological parameters. The quantitative analysis of the biofilm showed that an increase in the number of microorganisms was observed in the initial phase of biofilm formation (reached 1.4 × 104 CFU/mL/cm2 on day 14). During this period, there was a chaotic build-up of bacterial cells, as evidenced by an increase in the roughness of the profile lines. Unstable elevations of the biofilm formed in this way could be easily detached from the structure of the material, which resulted in deterioration of the bacteriological quality of the water leaving the installation. The obtained results indicate that the biofilm completely and permanently covered the surface of the tested material after 25 days of testing (the surface roughness described by the fractal dimension decreased). Moreover, the favorable temperature (22.6 °C) and the recorded decrease in the content of inorganic nitrogen (by 15%), phosphorus (by 14%), and dissolved oxygen (by 15%) confirm the activity of microorganisms. The favorable environmental conditions in the installation (the presence of nutrients, low chlorine concentration, and high temperature) contributed to the secondary development of microorganisms, including pathogenic organisms in the tested waters. Full article
(This article belongs to the Special Issue Drinking Water Pipe Network and Water Quality Safety)
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