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Outbreaks of cryptosporidiosis throughout the world, especially the massive outbreak in Milwakee in 1993 drew public attention to the quality of drinking water supplies and to the efficiency of water treatment methods. Cryptosporidiosis is a severe gastrointestinal disease caused by the transmissive form of Cryptosporidium parvum protozoan and its oocysts.
Digestion of as few as 30 oocysts may be fatal to infants, elderly and immunocompromized persons. C. parvum oocysts are ubiquitous in untreated water and extremely resistant to harsh environmental conditions including standard water treatment procedures.
We have developed an integrated modeling strategy to quantify the risk of surface drinking water contamination by water borne pathogens, in particular the oocysts of C. parvum, from agricultural non-point pollution sources. This project is comprised of both a modeling and an experimental effort.
The main experimental effort focused on the measurement of C. parvum oocysts partitioning in the soil/water systems with the objective of parameterizing the transport model.
The pathogen transport model is based on the behavior of a single microorganism and inherently predicts the random variability of pathogen transport.
Diagnostic Tools to Evaluate Impacts of Trace Organic Compounds (Prioritization Framework for TOrCs)
With the advent of improved analytical detection capabilities, a variety of organic chemicals have been found in trace amounts (Trace Organic Chemicals, TOrCs) in surface waters, sediment, and...
WEF/WERF Study Quantifying Nutrient Removal Technology Performance
The Water Environment Research Foundation (WERF) Nutrient Challenge Research Program and the Water Environment Federation (WEF) cooperated in a comprehensive study of nutrient removal plants...
Emerging Energy Reducing Technologies for Desalination Applications
The purpose of this project was to independently evaluate two emerging desalination technologies that showed promise for at least 10 to 15% savings in specific energy consumption (SEC) during...
Predicting the Remaining Economic Life of Wastewater Pipes: Phase 2 Development of a Robust Wastewater Pipe Performance Index
Available as eBook only
Water plays a critical role in every aspect of civilization: agriculture, industry, economy, environment, recreation, transportation, culture, and...
Treatment Wetlands (Hindi Translation)
Water quality standards across the world are being re-written to promote healthier ecosystems, ensure safe potable water sources, increased biodiversity, and enhanced ecological functions....
Acclimation of Nitrifiers for Activated Sludge Treatment: A Bench Scale Evaluation
Nitrification kinetics were evaluated in bench-scale batch reactors fed with a synthetic wastewater containing approximately 1,000 mg ammonia-nitrogen (NH3-N)/L operated at 5, 10, and 20...
Trace Organic Compounds and Implications for Wastewater Treatment: Technical Brief
This Technical Brief has been prepared in response to concerns over the presence of trace organic compounds (TOrC) in wastewater, water supplies, and the receiving environment (Associated Press,...
Assessment of Technologies for Screening, Floatable Control, and Screenings Handling
Screening and floatable controls are used at wastewater treatment, sanitary sewer overflow (SSO) and combined sewer overflow (CSO) locations. Screening is a preliminary treatment step and...