Control of Distribution System Water Quality Using Inhibitors PDF Download
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Author: J. Taylor
Publisher: International Water Assn
ISBN: 9781843392613
Category : Science
Languages : en
Pages : 476
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Book Description
This study was conducted to investigate the capabi
Author: J. Taylor
Publisher: International Water Assn
ISBN: 9781843392613
Category : Science
Languages : en
Pages : 476
Get Book Here
Book Description
This study was conducted to investigate the capabi
Author: J. S. Taylor
Publisher:
ISBN: 9781605730448
Category : Water
Languages : en
Pages : 424
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309103061
Category : Science
Languages : en
Pages : 405
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Book Description
Protecting and maintaining water distributions systems is crucial to ensuring high quality drinking water. Distribution systems-consisting of pipes, pumps, valves, storage tanks, reservoirs, meters, fittings, and other hydraulic appurtenances-carry drinking water from a centralized treatment plant or well supplies to consumers' taps. Spanning almost 1 million miles in the United States, distribution systems represent the vast majority of physical infrastructure for water supplies, and thus constitute the primary management challenge from both an operational and public health standpoint. Recent data on waterborne disease outbreaks suggest that distribution systems remain a source of contamination that has yet to be fully addressed. This report evaluates approaches for risk characterization and recent data, and it identifies a variety of strategies that could be considered to reduce the risks posed by water-quality deteriorating events in distribution systems. Particular attention is given to backflow events via cross connections, the potential for contamination of the distribution system during construction and repair activities, maintenance of storage facilities, and the role of premise plumbing in public health risk. The report also identifies advances in detection, monitoring and modeling, analytical methods, and research and development opportunities that will enable the water supply industry to further reduce risks associated with drinking water distribution systems.
Author: Bingjie Zhao
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Book Description
In addition it was shown that increasing the chloramines residual could offset any additional growth and that the inhibitors could help compliance with the lead and copper rule. However corrosion inhibitors might result in an increase in monitoring and maintenance requirements, particularly in dead ends, reaches with long HRTs, and possibly storage facilities. In addition it is unknown what the effect of corrosion inhibitors are on the growth of coliform bacteria and opportunistic pathogens relative to ordinary heterotrophs. A method was developed to monitor precision for heterotrophic plate count (HPC) using both blind duplicates and lab replicates as part of a project looking at pilot drinking water distribution systems. Precision control charts were used to monitor for changes in assay variability with time just as they are used for chemical assays. In adapting these control charts for the HPC assay, it was determined that only plate counts[greater than or equal to]30 cfu per plate could be used for Quality Assurance (QA) purposes. In addition, four dilutions were used for all known Quality Control (QC) samples to ensure counts usable for QC purposes would be obtained. As a result there was a 50% increase in the required labor for a given number of samples when blind duplicates and lab replicates were run in parallel with the samples. For bulk water HPCs the distributions of the duplicate and replicate data were found to be significantly different and separate control charts were used. A probability based analysis for setting up the warning limit (WL) and control limit (CL) was compared with the method following National Institute of Standard and Technology (NIST) guidelines.
Author: Gregory J. Kirmeyer
Publisher: American Water Works Association
ISBN: 1583210024
Category : Water quality management
Languages : en
Pages : 368
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Book Description
Author: AWWA Staff
Publisher: American Water Works Association
ISBN: 1613001177
Category : Corrosion and anti-corrosives
Languages : en
Pages : 213
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Book Description
Author: HDR Engineering Inc.
Publisher: John Wiley & Sons
ISBN: 0471150835
Category : Technology & Engineering
Languages : en
Pages : 1153
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Book Description
Public water systems deliver high-quality water to the public. They also present a vast array of problems, from pollution monitoring and control to the fundamentals of hydraulics and pipe fitting.
Author: AWWA (American Water Works Association)
Publisher: American Water Works Association
ISBN: 1583217908
Category : Technology & Engineering
Languages : en
Pages : 213
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Book Description
This AWWA manual of practice provides information on the factors that influence pipe corrosion, assessing corrosion-related impacts, water quality and implementation, and maintenance of an effective corrosion control program.
Author: Steven J. Duranceau
Publisher: American Water Works Association
ISBN: 9781583213261
Category : Electrochemical analysis
Languages : en
Pages : 312
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Book Description
This research studied the use of multi-element sensors based on electrochemical techniques for optimizing information related to corrosion control in water distribution systems. Such on-line sensor methods could provide an affordable and reliable tool for daily monitoring and mitigate some of the costs associated with following the mandates of the EPA's corrosion control for potable water.
Author: Gregory J. Kirmeyer
Publisher: American Water Works Association
ISBN: 1583210741
Category : Water
Languages : en
Pages : 380
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Book Description
The report of multi-disciplinary team of engineers and practitioners from a research project commissioned by the Association to create a resource to help water utilities operate and maintain water distributions systems to prevent water quality from deteriorating. They look at prevention programs, qu
