Optimizing source water blends for corrosion and residual control in distribution systems

    Authors

    S. A. Imran; J. D. Dietz; G. Mutoti; W. Z. Xiao; J. S. Taylor;V. Desai

    Comments

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    Abbreviated Journal Title

    J. Am. Water Work Assoc.

    Keywords

    RELEASE; Engineering, Civil; Water Resources

    Abstract

    Utilities must understand the issues involved when multiple source waters are blended, particularly the effect on distribution system water quality. This article describes a multiobjective technique that can help evaluate blends to identify acceptable water quality for simultaneous control of lead, copper, iron, and monochloramine levels in distribution systems. Blends of three source waters-groundwater, surface water, and desalinated water-were evaluated. Modeling results indicated that different pipe materials often have conflicting water quality requirements for release abatement. For example, corrosion of copper and lead pipes was increased by increasing alkalinity, whereas increasing alkalinity was beneficial in reducing the release of iron corrosion products from pipes. Increasing sulfates reduced lead release but increased iron release. These conflicting water quality requirements for lead, copper, and iron release mean that utilities must evaluate the tradeoffs between water quality and corrosion response.

    Journal Title

    Journal American Water Works Association

    Volume

    98

    Issue/Number

    5

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    107

    Last Page

    115

    WOS Identifier

    WOS:000238079100022

    ISSN

    0003-150X

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