Download EBOOK Long Term Effects of Disinfection Changes on Water Quality PDF for free


Download EBOOK Long Term Effects of Disinfection Changes on Water Quality PDF for free Category: Technology & Engineering
The author of the book: compilation by Catherine Spencer
Format files: PDF, EPUB, TXT, DOCX
The size of the: 979 KB
Language: English
ISBN-13: 9781843398257
Edition: Iwa Publishing
Date of issue: 28 February 2008

Description of the book "Long Term Effects of Disinfection Changes on Water Quality":

Chlorine has been used in the treatment of drinking water in the United States since 1908. Since the Safe Drinking Water Act of 1974 and its amendments, utilities around the country have made changes to their disinfection strategies to meet more stringent regulations for either microbial contaminants or disinfection by-products (DBPs). Specifically, utilities have investigated and implemented the use of alternatives to chlorine. Consequently, ozone and chlorine dioxide have been tested and applied at treatment plants for primary disinfection, and the use of chloramines has increased for secondary disinfection. While it is well accepted by many in the drinking water PDF community that many of these changes will have beneficial impacts, it is not well known how these changes in disinfection will affect distribution system water quality in the long term. Based on a comprehensive literature review and the experience of 26 participating water utilities, potential positive and adverse water quality impacts were identified and summarized when changing from chlorine to either chloramines, ozone, chlorine dioxide, or ultraviolet (UV) light.The data indicated better microbial quality, such as lower coliform levels and heterotrophic plate counts (HPC) and reduced levels of disinfection by-products like trihalomethanes and haloacetic acids. Disinfection changes also led to reduced ePub numbers of customer complaints regarding red or discolored water and tastes and odors. However, two of the more common adverse impacts included some higher HPC levels when using chloramines or ozone and nitrification when using chloramines.

Download EBOOK Long Term Effects of Disinfection Changes on Water Quality PDF for free


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compilation by Catherine Spencer

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Download EBOOK Long Term Effects of Disinfection Changes on Water Quality PDF for free



Download EBOOK Long Term Effects of Disinfection Changes on Water Quality for free

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