Guidance Manual for Coagulant Changeover

Guidance Manual for Coagulant Changeover

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This manual is a source document for utilities that are considering a coagulant changeover. It is intended to provide an appreciation of what must be considered for a successful changeover based on the input of U.S. and Canadian utilities (Chapters 1 and 6). New regulatory requirements will likely have the broadest and most substantial impact on primary coagulant use (Chapter 3). The Interim Enhanced Surface Water Treatment Rule (IESWTR) and Stage 1 Disinfectant and Disinfection Byproducts Rule (Stage 1 DBPR) will make finished water requirements more stringent to address microbial removal and the impacts of disinfection. Enhanced Coagulation and/or other operational and treatment practices will be used to achieve these requirements. The science of coagulation (Chapter 4) requires a special focus to address the intricacies of coagulation chemistry. The manual provides a step-by-step methodology to conduct a coagulant changeover using a detailed protocol (Chapter 5) -- background, executive summary.Readers are encouraged to reference the AWWA Manual of Water Supply Practice, Operational Control of ... If multiple sources are used, then testing should be performed on individual source samples or appropriate blends of the sources.

Title:Guidance Manual for Coagulant Changeover
Author: James DeWolfe
Publisher:American Water Works Association - 2003

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