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Co-directors

Sherri Cook, Associate Professor

The Cook Research Group specializes in the design and development of sustainable water treatment and resource recovery technologies. My group uses experimentation, process modeling, field work, and life cycle analyses to investigate three main research areas: sustainable water system design, water treatment and reuse, and material and energy recovery from waste. Her current research projects include sanitation in developing communities, drinking water system sustainability, water reuse and resource recovery, biochar as adsorbent and energy source and living hybrid materials.

Ben Stanford, Scholar in Residence

Dr. Stanford is Associate Vice President and Digital Services Lead at Hazen’s Denver office where he leads efforts in utility management and advanced digital technology solutions for drinking water, water reuse, and wastewater utilities.Ìý He has extensive experience in managing complex, multi-disciplinary projects related to digital strategies and solutions for water, wastewater, and water reuse utilities around the world, including co-leading American Water’s Technology and Innovation Division.Ìý He also brings extensive water quality and treatment expertise and is an internationally recognized expert in water chemistry, advanced process technology, and trace contaminant research and is a Scholar in Residence in Environmental Engineering at the ºÚÁÏÉçÇøÍø where he teaches courses in Water Reuse and Senior Design.

Faculty

Dr. Summers began working with reuse while at the US EPA in 1977-79 evaluating physical chemical treatment of wastewater with coagulation and granular activated carbon (GAC) adsorption. In 1980 he was part of a team that assessed the use of ozone and GAC for treating wastewater effluent prior to groundwater injection at a 1.0 MGD demonstration reclamation facility in California, and presented these results at the AWWARF Water Reuse Symposium in 1981, with additional presentations at AIChE and ACS meetings in 1982. In the past four years he has had three PhD students and one MS student evaluating the biochar and GAC adsorption and biofitration of greywater, stormwater, wastewater effluents and CSOs for the removal of specific organic compounds. In that same time he has had three graduate students and a postdoc evaluating the coagulation, ozonation, biofiltration and GAC adsorption of disinfection byproduct (DBP) precursors (both regulated and unregulated) from the effluent of treated municipal wastewater. Currently, three of his graduate students are evaluating the control of preformed DBPs in several reuse scenarios. He has over 30 reuse publications and presentations.

William Becker, Scholar-in-Residence, PE

Dr. Becker has 25 years consulting experience, 5 years utility experience and has taught graduate and undergraduate courses at three universities – all in drinking water treatment and water reuse. His reuse experience includes direct and indirect potable reuse, non-potable reuse and integration of reuse into water resource management portfolio. This broad experience gives him a rare perspective in helping utilities solve today’s challenging water supply and quality issue. Dr. Becker has conducted pilot studies, evaluated treatment systems, performed conceptual design for the development and optimization of water treatment systems, and trained employees, operators, and graduate students in various water treatment plant processes. He has consulted for some of the largest utilities in the country including Denver Water, New York City, Philadelphia, Washington Suburban Sanitary Commission, Baltimore, DC Water, Tampa, and Fairfax Water.

Karl Linden, Professor

Dr. Linden is an expert in water quality and treatment, specifically related to beneficial reuse of impaired waters including analysis of water quality constituents and design of tailored treatment systems to meet reuse needs that are fit for purpose. His work and expertise on electrified water treatment processes such as UV, advanced oxidation and ozonation for both remediation of organic contaminants and disinfection of pathogens is known internationally. Most recently he has been working in reclamation of water from conventional and unconventional oil and gas development and has a long history of municipal wastewater reuse research. In 2014 he was the WateReuse Association’s Person of the Year and has won numerous awards for his research accomplishments.

Mark Hernandez, Professor, PE

Dr. Hernandez maintains an active sanitary engineering consulting practice focused on troubleshooting biological wastewater treatment processes. Dr. Hernandez holds several University of Colorado materials and methods patents that are licensed to companies for the treatment of mining and industrial wastes. Dr. Hernandez also has several industrial innovation and partnership grants which focus on energy recovery and sustainability aspects of wastewater treatment, both industrial and domestic.

Joe Ryan, Professor

Dr. Ryan is an environmental chemist whose research has focused on characterizing wastewater from mine drainage and mining activities, contaminated groundwater, biogeochemistry of metals transformations and contaminants from hydraulic fracturing fluids. Most recently he was the PI on a $12M NSF funded AirWaterGas network evaluating sustainability of the oil and gas operations in the Rocky Mountains.

Fernando Rosario Ortiz, Professor

The research conducted at the Rosario group deals primarily with environmental chemistry and oxidative processes (e.g., ozone) during water, wastewater and reuse treatment. The characterization of organic matter in the environment, natural and treated wastewater effluents, especially with optical properties is a focus. Ongoing research topics include environmental photochemistry of algal toxins and impact of wildfires on water quality and treatment.

Joseph Kasprzyk, Assistant Professor

Dr. Kasprzyk focuses on multi-objective decision making and model diagnostics for engineering problems in the areas of water resources planning and management, environmental engineering applications, and advancing methodological contributions to decision making and optimization under uncertainty. Current and recent projects include robust decision making for the Colorado River Basin; improving understanding of the relationship between water allocations and thermoelectric power generation; decision support for water treatment under climate extremes and multi-objective optimization for Front Range Colorado water planning. Methods utilized range from high performance computer model simulations to interactive workshops with diverse groups of water managers and stakeholders.

Dr. Korak’s research interests are broadly focused on water treatment engineering spanning municipal drinking water, water reuse and industrial waste management. Her recent projects include developing holistic water treatment and waste brine management processes for ion exchange systems and evaluating corrosion of water distribution systems. Her research also focuses on using optical sensing techniques to characterize dissolved organic matter. As an engineer at the Bureau of Reclamation prior to joining ºÚÁÏÉçÇøÍø, she worked on treatment projects for challenging water matrices, including selenium-contaminated agricultural drainage in California.

Anthony Straub, Assistant Professor

Dr. Straub has experience developing materials, processes, and theoretical frameworks to improve the efficiency and cost of seawater desalination. He has specifically worked on analyzing the energy efficiency of membrane-based and thermal seawater desalination processes and has extensive experience developing novel membrane materials that can remove contaminants present in seawater. He has also been developing and analyzing high recovery membrane-based processes for inland desalination. These processes can reduce brine waste associated with brackish groundwater desalination. Specific projects have involved theoretical energy analysis and process testing for reverse osmosis and nanofiltration systems.

Cresten Mansfeldt, Assistant Professor

Dr. Mansfeldt’s research focuses on microbiologically mediated material biotransformations in municipal, agricultural, and natural environments. Within agricultural systems, his research focuses on the fate and recapture of aqueous nitrogen and phosphorus compounds, the origin, biotransformation, and legacy of polar trace organic contaminants such as pesticides, and the resiliency of the associated microbial communities to determine the appropriate treatment and application of the runoff. Concerning livestock applications, h