scholarly journals Influence of hydraulic regimes and Cl2/NH3-N mass ratios on the bacterial structure and composition in an experimental flow cell chloraminated drinking water system

2019 ◽  
Vol 5 (5) ◽  
pp. 977-992 ◽  
Author(s):  
Yi Shi ◽  
Akintunde Babatunde ◽  
Bettina Bockelmann-Evans ◽  
Gordon Webster
Keyword(s):  
Drinking Water ◽  
Water System ◽  
Flow Cell ◽  
System P ◽  
Drinking Water System ◽  
Mass Ratios ◽  
Bacterial Structure ◽  
Microbial Analysis

A novel microbial analysis regarding impacts of hydraulic regimes and Cl2/NH3-N mass ratios is provided for an experimental chloraminated DWDS experiencing nitrification.

scholarly journals Microbiological water quality in a decentralized Arctic drinking water system

2020 ◽  
Vol 6 (7) ◽  
pp. 1855-1868
Author(s):  
Stephanie L. Gora ◽  
Tim Anaviapik Soucie ◽  
Nicole E. McCormick ◽  
C. Carolina Ontiveros ◽  
Vincent L'Hérault ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water System ◽  
Arctic Region ◽  
Water Source ◽  
Domestic Water ◽  
Point Of Use ◽  
System P ◽  
Drinking Water System ◽  
Microbiological Water Quality ◽  
Drinking Water Samples

Drinking water samples were collected from the water source, water delivery truck, domestic water storage tanks, and at the point of use in a decentralized drinking water system in Pond Inlet, Nunavut, a predominantly Inuit community in Canada's Arctic region.

scholarly journals The removal of ammonia, arsenic, iron and manganese by biological treatment from a small Iowa drinking water system

2020 ◽  
Vol 6 (11) ◽  
pp. 3142-3156
Author(s):  
Darren A. Lytle ◽  
Daniel Williams ◽  
Christy Muhlen ◽  
Eugenia Riddick ◽  
Maily Pham
Keyword(s):  
United States ◽  
Drinking Water ◽  
Distribution System ◽  
Biological Treatment ◽  
Water System ◽  
System P ◽  
Drinking Water System ◽  
Iron And Manganese

Although not regulated in United States drinking water, ammonia has the potential to increase chlorine consumption and cause nitrification problems in the distribution system.

Temporal variability of disinfection by-products concentration in urban public water system

2013 ◽  
Vol 14 (4) ◽  
pp. 393-398
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Temporal Variability ◽  
Water System ◽  
The Other ◽  
Major Constituent ◽  
System P ◽  
Public Water System ◽  
Drinking Water Samples ◽  
By Products

The occurrence of trihalomethanes (THMs) was studied in the drinking water samples from urban water supply network of Karachi city that served more than 18 million people. Drinking water samples were collected from 58 locations in summer (May-August) and winter (November-February) seasons. The major constituent of THMs detected was chloroform in winter (92.34%) and summer (93.07%), while the other THMs determined at lower concentrations. Summer and winter concentrations of total THMs at places exceed the levels regulated by UEPA (80 μg l-1) and WHO (100 μg l-1). GIS linked temporal variability in two seasons showed significantly higher median concentration (2.5%-23.06%) of THMs compared to winter.

scholarly journals Influence of an Extended Domestic Drinking Water System on the Drinking Water Quality

Water ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 582 ◽  
Author(s):  
Ljiljana Zlatanović ◽  
Aleksandra Knezev ◽  
Jan van der Hoek ◽  
Jan Vreeburg
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water System ◽  
Drinking Water Quality ◽  
Drinking Water System

Removal of N-nitrosamine precursors in drinking water system using adsorption methods

2015 ◽  
Vol 156 ◽  
pp. 972-979 ◽  
Author(s):  
Qihua Wu ◽  
Honglan Shi ◽  
Yinfa Ma ◽  
Craig Adams ◽  
Hua Jiang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water System ◽  
Drinking Water System

scholarly journals Exploring the relationships between small non-community drinking water system characteristics and water system performance in Ontario, Canada

2016 ◽  
Vol 14 (6) ◽  
pp. 998-1008
Author(s):  
Wendy Pons ◽  
Ian Young ◽  
David Pearl ◽  
Andria Jones-Bitton ◽  
Scott A. McEwen ◽  
...  
Keyword(s):  
Drinking Water ◽  
Ground Water ◽  
Water System ◽  
Low Risk ◽  
Assessment Process ◽  
E Coli ◽  
Drinking Water System ◽  
Training Opportunities ◽  
System Characteristics ◽  
Test Result

The objectives of this work were to investigate the relationships between characteristics of small non-community drinking water systems (SDWSs) and the performance of these systems with respect to Escherichia coli testing and risk ratings. Ontario-wide SDWS data were analysed using regression models with outcomes of (1) having an adverse E. coli test result in the 12 months prior to the last inspection and (2) the SDWS risk rating (high/medium vs. low risk) that is assigned by public health inspectors. Almost 34% (2,364/7,003) of SDWSs did not utilize treatment, more commonly for ground water than surface supplies (P < 0.001). The odds of having a positive E. coli test result were greater in systems using ground water with treatment (OR = 2.00; 95% CI 1.23–3.24) and surface water with treatment (OR = 1.97; 95% CI 1.05–3.71) compared to ground water with no treatment. The odds of having a water system rated high or medium compared to low risk was greater if the water system operated seasonally (OR = 1.36; 95% CI 1.17–1.59), had an adverse E. coli test result (OR = 1.66; 95% CI 1.09–2.53), and in specific facility types. This research helps to inform existing training opportunities available to SDWS operators in Ontario, and to better standardize the SDWS risk assessment process.

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