The effect of long-term wastewater cross-connection on the biofilm of a simulated water distribution system

2003 ◽  
Vol 2 (2) ◽  
pp. 85-98 ◽  
Author(s):  
Shawn G Gibbs ◽  
Mark C Meckes ◽  
Pasquale V Scarpino
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Cross Connection

scholarly journals Promoting equitable water distribution system from Melamchi Water Supply Project in Kathmandu Valley

2020 ◽  
Vol 20 (8) ◽  
pp. 2964-2970
Author(s):  
D. P. Ayadi ◽  
A. Rai ◽  
A. Pandey
Keyword(s):  
Water Supply ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Water Distribution Network ◽  
Supply System ◽  
Kathmandu Valley ◽  
Drinking Water Resources ◽  
Key Issues

Abstract The effective and efficient supply of drinking water resources are key to its long-term use and access. In recent decades, the population of Kathmandu Valley has exploded owing to several factors. The water supply system here has also undergone remarkable changes and efforts have been made to enhance its equitable distribution. The major effort, of course, is the Melamchi Water Supply Project (MWSP). As the project approaches completion of its first phase, we would like to point out several key issues for the water distribution system here and express our opinions on promoting equitable water distribution. For this we conducted a thorough literature review and found that improvement in the water distribution network and water tariff in the valley, along with promotion of alternative mitigation options, are the focal issues for promoting an equitable water distribution system in Kathmandu Valley.

scholarly journals Long-Term Bacterial Dynamics in a Full-Scale Drinking Water Distribution System

PLoS ONE ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. e0164445 ◽  
Author(s):  
E. I. Prest ◽  
D. G. Weissbrodt ◽  
F. Hammes ◽  
M. C. M. van Loosdrecht ◽  
J. S. Vrouwenvelder
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Full Scale ◽  
Drinking Water Distribution System ◽  
Bacterial Dynamics ◽  
Drinking Water Distribution

scholarly journals Long-Term Succession of Structure and Diversity of a Biofilm Formed in a Model Drinking Water Distribution System

2003 ◽  
Vol 69 (11) ◽  
pp. 6899-6907 ◽  
Author(s):  
Adam C. Martiny ◽  
Thomas M. Jørgensen ◽  
Hans-Jørgen Albrechtsen ◽  
Erik Arvin ◽  
Søren Molin
Keyword(s):  
Drinking Water ◽  
Community Composition ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Single Cells ◽  
Drinking Water Distribution System ◽  
Structural Morphology ◽  
Drinking Water Distribution

ABSTRACT In this study, we examined the long-term development of the overall structural morphology and community composition of a biofilm formed in a model drinking water distribution system with biofilms from 1 day to 3 years old. Visualization and subsequent quantification showed how the biofilm developed from an initial attachment of single cells through the formation of independent microcolonies reaching 30 μm in thickness to a final looser structure with an average thickness of 14.1 μm and covering 76% of the surface. An analysis of the community composition by use of terminal restriction fragment length polymorphisms showed a correlation between the population profile and the age of the sample, separating the samples into young (1 to 94 days) and old (571 to 1,093 days) biofilms, whereas a limited spatial variation in the biofilm was observed. A more detailed analysis with cloning and sequencing of 16S rRNA fragments illustrated how a wide variety of cells recruited from the bulk water initially attached and resulted in a species richness comparable to that in the water phase. This step was followed by the growth of a bacterium which was related to Nitrospira, which constituted 78% of the community by day 256, and which resulted in a reduction in the overall richness. After 500 days, the biofilm entered a stable population state, which was characterized by a greater richness of bacteria, including Nitrospira, Planctomyces, Acidobacterium, and Pseudomonas. The combination of different techniques illustrated the successional formation of a biofilm during a 3-year period in this model drinking water distribution system.

scholarly journals Impact of coagulation–ultrafiltration on long-term pipe biofilm dynamics in a full-scale chloraminated drinking water distribution system

2020 ◽  
Vol 6 (11) ◽  
pp. 3044-3056
Author(s):  
Kristjan Pullerits ◽  
Sandy Chan ◽  
Jon Ahlinder ◽  
Alexander Keucken ◽  
Peter Rådström ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Full Scale ◽  
Drinking Water Distribution System ◽  
System P ◽  
Drinking Water Distribution ◽  
Biofilm Community

Introducing coagulation–ultrafiltration removed bacteria from the drinking water but did not impact nitrification, localizing this process to the biofilm community.

Short- and Long-Term Lead Release after Partial Lead Service Line Replacements in a Metropolitan Water Distribution System

2017 ◽  
Vol 51 (17) ◽  
pp. 9507-9515 ◽  
Author(s):  
Elise Deshommes ◽  
Laurent Laroche ◽  
Dominique Deveau ◽  
Shokoufeh Nour ◽  
Michèle Prévost
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Service Line ◽  
Lead Release ◽  
Short And Long Term

scholarly journals Long-term planning methodology for water distribution system rehabilitation

1998 ◽  
Vol 34 (8) ◽  
pp. 2039-2051 ◽  
Author(s):  
Yehuda Kleiner ◽  
Barry J. Adams ◽  
J. Scott Rogers
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Planning Methodology
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