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During wet weather events, separate and combined wastewater collection systems deliver substantial amounts of storm water runoff to wastewater treatment plants. Often these flows inundate collection systems and treatment works creating bypasses of untreated or partially treated wastewater. The federal Clean Water Act (CWA), its amendments, and associated regulations have been attempting to address these concerns for nearly 30 years. These regulations, coupled with the wastewater treatment standards under the CWA, are posing immense challenges to the owner/operators of wastewater systems, who are also driven to provide the most cost-effective service to customers.
This project (WERF Project 00-CTS-6, "Best Practices for the Treatment of Wet Weather Wastewater Flows") undertook a review of currently available technologies to improve the performance and efficiency of wet weather wastewater treatment and also identified potentially beneficial technologies and methodologies that are emerging in this area.
The project report includes the types and characteristics of current technologies and methodologies available to ensure treatment of wet weather wastewater flows. The following are the categories of technologies are assessed in report: vortex separation, enhanced clarification, operational enhancements, flushing systems, and disinfection.
Next Generation Tools for Assessing Death and Decay of Critical Wastewater Bacteria
This work used a combination of traditional microbiological and molecular approaches and modeling to advance understanding of decay processes in wastewater treatment. The overall goal was to...
Quantification of Airborne Biological Contaminants Associated with Land-Applied Biosolids
Greater than 50% of all class B biosolids produced in the US are reused by application to agricultural land. The goal of this research was to pair a comprehensive literature review with a field...
Sustainable Technology for Achieving Very Low Nitrogen and Phosphorus Effluent Levels
This project addresses the successful nitrogen and phosphorus removal technologies being implemented at existing wastewater treatment plants (WWTPs), some key challenges...
Development of Practical Methods to Assess the Presence of Bacterial Pathogens in Water
The objective of this project was to develop and evaluate a practical technique to indicate the probability of the presence of bacterial pathogens in receiving waters. A practical method was...
Utility Benchmarking for Drinking Water: Synthesis Report
A robust performance evaluation process greatly enhances drinking water utilitys ability to achieve and measure improvement in performance in many key areas. A major contribution from this study...
Municipal Water and Wastewater Services Reform in the Russian Federation
Russia is going through a complicated period of transforming its economy with a focus on the expansion of private sector activity. This includes reforms in the field of municipal water supply and...
Waterborne Pathogens: Review for the Drinking Water Industry
Infectious diseases caused by pathogenic bacteria, viruses and protozoa, are the most common and widespread health risk associated with drinking water. Most waterborne pathogens are introduced...
Risk Management for Water and Wastewater Utilities
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