Understanding Copper Pitting in Drinking Water Pipes

Opflow ◽  
2021 ◽  
Vol 47 (8) ◽  
pp. 20-22
Author(s):  
Min Tang ◽  
Michael R. Schock ◽  
Helen Y. Buse ◽  
Darren A. Lytle ◽  
Robert E. Fields ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Pipes

scholarly journals Preventing leaching from lead water pipes with electrochemistry: an exploratory study

2021 ◽  
Author(s):  
Gabriel Pablo Lobo ◽  
Ashok Gadgil
Keyword(s):  
Drinking Water ◽  
Exploratory Study ◽  
Water Distribution ◽  
Water Systems ◽  
Effective Solution ◽  
Water Pipes ◽  
The Us ◽  
Public Drinking Water ◽  
Lead Leaching ◽  
Pipe Replacement

Toxic levels of lead leaching from ageing water distribution infrastructure affect over 5,000 public drinking water systems in the US. Pipe replacement, the most effective solution to this problem, is...

scholarly journals Sodium Hypochlorite Treatment: The Impact on Bacteria and Endotoxin Concentrations in Drinking Water Pipes of A Pig Nursery

Agriculture ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 86
Author(s):  
Regina Böger ◽  
Karl Rohn ◽  
Nicole Kemper ◽  
Jochen Schulz
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Sodium Hypochlorite ◽  
Coliform Bacteria ◽  
Treated Water ◽  
Water Pipes ◽  
Pseudomonas Spp ◽  
Untreated Water ◽  
The Impact ◽  
Total Bacteria

Poor drinking water quality can affect pigs’ health and performance. The disinfection of water may enhance microbial water quality. In this study, bacteria and endotoxins in sodium hypochlorite-treated and -untreated water from one pig nursery were analyzed. Water samples were taken from incoming water and from compartments with treated and untreated water at the beginning and end of pipes and from nipples. The farm was visited 14 times to measure total bacteria counts and concentrations of Pseudomonas spp. and endotoxins. Additionally, the occurrence of coliform bacteria was analyzed. A mixed model analysis revealed significant reductions in total bacteria counts and Pseudomonas spp. in treated water at the beginning of pipes and at nipple drinkers. The differences between bacteria concentrations at the end of pipes had no clear trend. Endotoxin concentrations were approximately equal at the beginning of pipes and at nipple drinkers but were found to have differences at the end of pipes. The occurrence of coliform bacteria was significantly reduced in treated water. The application of sodium hypochlorite can significantly reduce bacteria in water pipes. Endotoxin concentrations were mostly unaffected by water treatment. Disinfection of the dead-end pipe sections failed, and thus these parts should be regarded as potential contamination sources.

Copper Drinking Water Pipes as a Previously Undocumented Source of Silver-Based Nanoparticles

2019 ◽  
Vol 53 (22) ◽  
pp. 13293-13301 ◽  
Author(s):  
Andreas Wimmer ◽  
Jessica Beyerl ◽  
Michael Schuster
Keyword(s):  
Drinking Water ◽  
Water Pipes

The role of biofilms in the mobilisation of polycyclic aromatic hydrocarbons (PAHs) from the coal-tar lining of water pipes

2000 ◽  
Vol 41 (4-5) ◽  
pp. 279-285 ◽  
Author(s):  
M. Maier ◽  
D. Maier ◽  
B.J. Lloyd
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Coal Tar ◽  
Drinking Water Distribution Systems ◽  
Water Pipes ◽  
Real Distribution ◽  
Water Mains ◽  
Drinking Water Distribution ◽  
Polycyclic Aromatic

The influence of biofilm formation on the coal-tar lining of water pipes in drinking water distribution systems was investigated in batch experiments as well as in a continuously flown circular reactor system. The nutrient source for the growth of the biofilm was only the drinking water and the coal-tar coating on the slides. The growth and existence of the biofilm was examined using different techniques. Leaching experiments showed clearly that the biofilm has protective characteristics because enhanced PAH concentrations could be detected after the removal of the biofilm from the slides. Moreover, the dosage of chlorine as a disinfectant during the reactor experiments gave indication that the chlorination resulted in a destabilisation of the biofilm which lead to elevated PAH concentrations. The results are in correspondence with observations made in real distribution systems where enhanced PAH concentrations were observed during disinfection processes. The examination of coal-tar coated water mains revealed that in addition to the protective effect of a biofilm a vast amount of the PAHs was adsorbed on particles embedded in the biofilm, e.g. from the iron oxidising bacteria Gallionella.

Dynamics of material detachment from drinking water pipes under flushing conditions in a full-scale drinking water laboratory system

2020 ◽  
Vol 17 (8) ◽  
pp. 745-753
Author(s):  
Artur Sass Braga ◽  
Rain Saulnier ◽  
Yves Filion ◽  
Alexandria Cushing
Keyword(s):  
Drinking Water ◽  
Full Scale ◽  
Laboratory System ◽  
Water Pipes

scholarly journals The Role of the Motility of Methylobacterium in Bacterial Interactions in Drinking Water

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1386 ◽  
Author(s):  
Erifyli Tsagkari ◽  
William Sloan
Keyword(s):  
Drinking Water ◽  
Biofilm Formation ◽  
Bacterial Motility ◽  
Water Industry ◽  
Water Pipes ◽  
Bacterial Interactions ◽  
Available Energy ◽  
Potential Tool

Bacterial motility is one important factor that affects biofilm formation. In drinking water there are key bacteria in aggregation, whose biology acts to enhance the formation of biofilms. However, it is unclear whether the motility of these key bacteria is an important factor for the interactions between bacteria in drinking water, and, subsequently, in the formation of aggregates, which are precursors to biofilms. Thus, the role of the motility of one of these key bacteria, the Methylobacterium strain DSM 18358, was investigated in the interactions between bacteria in drinking water. The motility of pure Methylobacterium colonies was initially explored; if it was affected by the viscosity of substrate, the temperature, the available energy and the type of substrate. Furthermore, the role of Methylobacterium in the interactions between mixed drinking water bacteria was investigated under the mostly favourable conditions for the motility of Methylobacterium identified before. Overall, the motility of Methylobacterium was found to play a key role in the communication and interactions between bacteria in drinking water. Understanding the role of the motility of key bacteria in drinking water might be useful for the water industry as a potential tool to control the formation of biofilms in drinking water pipes.

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