Research Reports

Principal Investigators
Karl Linden, Ph.D., University of Colorado, Boulder
Jörg E. Drewes, Ph.D., Colorado School of Mines
Stuart Khan, Ph.D., University of New South Wales
Joel Smith, Stratus Consulting

Principal Investigator
Joan A. Oppenheimer, MWH

Principal Investigator and Project Manager
Kathleen Muller, Friends of Guadalupe River Park & Gardens

Cysts of the protozoan parasite Giardia lamblia are found worldwide in surface water, in wastewater, and in treatment plant effluents. If ingested, infectious cysts release a trophozoite that can initiate an infection by colonizing the small intestine and dividing to high numbers. Immunofluorescence assays that are routinely used to microscopically detect cysts in water concentrates or fecal samples do not differentiate between infectious cysts and cysts that are unable to cause an infection.

Reclaimed Water Desalination Technologies: A Full-Scale Performance and Cost Comparison Between Electrodialysis Reversal and Microfiltration/Reverse Osmosis

Principal Investigator and Project Manager
R. Shane Trussell, Trussell Technologies, Inc.

Principal Investigator
Samer Adham, Ph.D., MWH

Desalination technologies using reverse osmosis (RO) membranes have been in development for more than four decades. Although significant advances in membrane technology have been developed to efficiently operate seawater RO (SWRO) systems, control of membrane fouling still seems elusive. Because of seawater’s complex matrix, characterization and identification of the nature of foulants responsible for decreased SWRO performance are incomplete. 

Principle Investigators
Christine L. Moe, PhD, Emory University
Vincent Hill, PhD, PE, Centers for Disease Control and Prevention

Principal Investigator and Project Manager
Christopher Yu, PhD., P.E., Psomas

The Water Replenishment District of Southern California (WRD) has instituted numerous projects and programs over the years in a continuing effort to effectively manage groundwater replenishment and groundwater quality in southern California's Central and West Coast Basins.

Principal Investigator and Project Manager
Jörg E. Drewes, Ph.D., Colorado School of Mines

An increasing number of water utilities are using drinking water sources influenced by wastewater discharge and others are planning for or implementing indirect potable reuse via groundwater recharge systems. The use of water sources influenced by wastewater has raised public concerns because of the presence of trace organic contaminants.

This report presents the motivation and technical results of a combined field and laboratory study that was designed to assess attenuation of microconstituents in a creek augmented with recycled water. This research study was designed to supplement a planned stream augmentation pilot project in which the flow of Coyote Creek, a small, semiurban creek in San Jose, CA, was to be augmented with local recycled water via release to the tributary Upper Silver Creek.