WATER QUALITY CENTER MASTER ACCOUNT

Project: Research project

Project Details

Description

WATER QUALITY CENTER MASTER ACCOUNT Water Quality Membership Fee from the City of Tempe, AZ. Control of DBPs by Advanced Oxidation Process Microbial Pathogen Detection and Identification in Water Occurrence of Endocrine Disruptors in Raw and Finished Drinking Water in the Southwest Regional Water Quality Monitoring and Evaluation for the Metropolitan-Phoenix Area water Supply ASU has been working with regional water providers (SRP, CAP) and metropolitan Phoenix cities since 1998 on algae-related issues affecting drinking water supplies, treatment, and distribution. The results have improved the understanding of taste and odor (T&O) occurrence, control, and treatment, improved the understanding of dissolved organic and algae dynamics, and initiated a forum to discuss and address regional water quality issues. ASU proposes continuing this program. ASU would only continue this work if it benefits local water treatment plants (WTPs). ASU believes that the program does so by optimizing ongoing operations (i.e., reducing operating costs), improving the quality of municipal water for consumers, facilitating long-term water quality planning, and providing information on potentially future-regulated compounds. ASU has been monitoring water quality in terminal reservoirs (Lake Pleasant, Saguaro Lake, and Bartlett Lake) continuously from 1998 to the present for algae-related constituents (taste and odors, and more recently cyanotoxins), nutrients, and disinfection by-product precursors (Le., total and dissolved organic carbon and organic nitrogen). Additional monitoring has been conducted in the SRP and CAP canal systems and in water treatment plants in Phoenix, Tempe and Peoria. During this work, the Valley has been in a prolonged drought and recently one above average wet year, and this data provides important baseline data for development of new or expanded WTPs and management of existing WTPs in the future. The current work has improved the understanding of T&O sources and treatment, but additional research and monitoring into the future is necessary. Endocrine Disrupters and Toxicity Removal from Waters WQC Enhancement Project: Regional Water Quality Monitoring and Evaluation for the Metropolitan-Phoenix Area Water Supply The goal of the project will continue to be providing timely input on taste and odors for process control and canal-management decisions, plus providing critical information on other water quality parameters in the water supply system, conducting applied research, and education/communication. The project will include three tasks, each financially supported by one or more entities. The proposed activities have been developed based upon our collective experience over the past five years, discussions with major partners, and perceived opportunities to make large improvements in water quality. Details of the five tasks are presented in this section: Task 1 Process Control Monitoring & Recommendations Task 2 Applied Research Task 3 Education and Communication WQC Enhancement Project: Regional Water Quality Monitoring and Evaluation for the Metropolitan-Phoenix Area Water Supply The goal of the project will continue to be providing timely input on taste and odors for process control and canal-management decisions, plus providing critical information on other water quality parameters in the water supply system, conducting applied research, and education/communication. The project will include three tasks, each financially supported by one or more entities. The proposed activities have been developed based upon our collective experience over the past five years, discussions with major partners, and perceived opportunities to make large improvements in water quality. Details of the five tasks are presented in this section: Task 1 Process Control Monitoring & Recommendations Task 2 Applied Research Task 3 Education and Communication Supplement to: Control of Disinfection ByProducts (DBP's) in Drinking Water Distribution Systems The objectives of the proposed study is (1) to evaluate pilot-scale photocatalysis and enhanced coagulation for their ability to remove or destroy disinfection byproduct (DBP) precursors, DBPs including total trihalomethanes (TTHMs) and five haloacetic acids (HAA5), and DBP formation potential (FP) in Arizona surface waters, and (2) to investigate the characteristics of natural organic matters which have the greatest impact on the formation of DBPs. The proposed experimental design consists of three tasks. During the first task, untreated central Arizona surface water from the Salt River and Central Arizona Project (CAP) Canal will be used to evaluate and compare the efficacy of DBP precursor removal using photocatalysis and enhanced coagulation. In addition to the two untreated source waters, water samples will be collected at different stages in the water treatment process, including following sedimentation and following filtration. During the second task, removal efficacy of DBPs such as TTHMs and HAA5 using photocatalysis and enhanced coagulation will be evaluated. Water from a distribution hot spot will also be tested. Following treatment, the waters will be rechlorinated using chlorine and chloramines to evaluate the DBP formation potential in the treated water. During the last task, DBP formation as a function of size and composition fractionation will be explored in an attempt to identify the characteristics of natural organic matter that have the greatest impact on the formation of DBPs. This study aims to address different treatment scenarios using a pilot-scale TiO2 photocatalysis reactor to treat central Arizona surface waters. Enhanced coagulation has also been included as a point of comparison as it has been identified as the best available technology for DBP mitigation. This study provides information on the pilot-scale energy requirements necessary to achieve DBP precursor reductions (i.e., DOC, UV254 etc.), organic mineralization, and a reduction in DBPs (i.e., TTHMs and HAA5) and DBP formation potential.
StatusFinished
Effective start/end date1/1/0812/31/09

Funding

  • INDUSTRY: Various Consortium Members: $248,721.00

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