Recent Research

Leaching of Metals from Aquifer Soils during Infiltration of Low-Ionic-Strength Reclaimed Water

zdorsey@watereuse.org — Wed, 03 Feb 2010 12:52:52 -0500

This research project assesses the potential for metal leaching during surface infiltration operations using reverse osmosis (RO)-treated wastewater and evaluates strategies for mitigating risks associated with metal leaching. The report is intended to inform utilities of major water quality parameters that contribute to leaching of metals of public health concern and to suggest strategies that may be used to mitigate the associated risk.

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The Psychology of Water Reclamation and Reuse

zdorsey@watereuse.org — Wed, 03 Feb 2010 12:49:34 -0500

The Psychology of Water Reclamation and Reuse identifies and explains research needs that will help the water reuse industry better understand the human response to water reclamation and reuse. Under this project, initial research into the human response to water reuse was also conducted and the findings are presented. The research focuses on attitudes, beliefs, choices and decisions and the multiple variables that influence them.

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Evaluating Pricing Level and Structures to Support Reclaimed Water Systems

zdorsey@watereuse.org — Wed, 03 Feb 2010 12:45:32 -0500

This research study developed a Microsoft® Excel Model that is designed to allow utility staff, public officials, and stakeholders to assess the financial solvency of a reclaimed water program. This Model also serves as a mechanism for the organization of key documents required throughout the reclaimed water decision-making process.

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The Effects of Salinity on the Removal of Contaminants of Concern during Biological Water Reclamation

zdorsey@watereuse.org — Tue, 20 Oct 2009 10:55:16 -0400

Formation and Fate of Chlorination Byproducts in Desalination Systems

zdorsey@watereuse.org — Mon, 17 Aug 2009 17:28:17 -0400

Collecting, Exploring, and Interpreting Microbiological Data Associated with Reclaimed Water Systems

zdorsey@watereuse.org — Mon, 17 Aug 2009 17:23:44 -0400

Selection and Testing of Tracers for Measuring Travel Times in Groundwater Aquifers Augmented with Reclaimed Water

zdorsey@watereuse.org — Tue, 07 Jul 2009 10:37:01 -0400

The primary objective of this project was to identify, select, and test environmentally acceptable tracers for measuring travel times of reclaimed water and its constituents in recharge systems. The secondary objective was to develop a protocol for conducting tracer tests on recharge systems that are augmented with reclaimed water. The Principal Investigator was Wontae Lee, Ph.D., P.E. of HDR Engineering, Inc.

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A Protocol for Estimating Potential Water Quality Impacts of Recycled Water projects

zdorsey@watereuse.org — Tue, 07 Jul 2009 10:33:24 -0400

The overall goal of the study was to facilitate the development and implementation of beneficial reuse projects using recycled water that meets the California Department of Public Health (DPH) tertiary treatment standards for unrestricted reuse. To achieve this goal, the study developed a Framework consisting of a process, with associated analytical tools, to assess the environmental impacts of water reuse projects. The Principal Investigator was David W. Smith, Ph.D. of Merritt Smith Consulting.

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Methods for the Detection of Residual Concentrations of Hydrogen Peroxide in Advanced Oxidation Processes

zdorsey@watereuse.org — Fri, 01 May 2009 12:46:37 -0400

The purpose of this project was to develop a laboratory method for reliable quantification of hydrogen peroxide in the 0.5- to 5-mg/L concentration range that is effective in a natural water matrix as well as in the presence of combined chlorine (chloramine). The Principal Investigators were Philip Brandhuber of HDR Engineering and Gregory Korshin of the University of Washington.

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A Reconnaissance-Level Quantitative Comparison of Reclaimed Water, Surface Water, and Groundwater

zdorsey@watereuse.org — Fri, 01 May 2009 12:43:19 -0400

This water quality study investigated, documented, and compared the water quality differences of reclaimed/recycled water, surface water, and groundwater. The project started in 2003, and the results, conclusions and recommendations are now published.