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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.
Phosphorus Fractionation and Removal in Wastewater Treatment: Implications for Minimizing Effluent Phosphorus
To address increasing water quality problems associated with eutrophication, state environmental agencies and the United States Environmental Protection Agency (EPA) are requiring more stringent...
Molecular Alternatives to Indicator and Pathogen Detection
Microbial quality of water is a prime public health concern in today's world. To protect public health, the World Health Organization and the U.S. Environmental Protection Agency have established...
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...
Prefiltration/Clarification via Dynamic Particle Separation
The project seeks to develop a non-fouling medialess inertial particle separator for use in industrial wastewater applications. The device, capable of removing fine particles from a fluid...
Decision Analysis and Implementation Guidance in Strategic Asset Management
Track 3 of WERF’s Strategic Asset Management Project was developed to “provide guidance on implementing SAM…and develop analytic tools for SAM implementation” - the Decision Support Tools and...
A Review of Advanced Sewer System Designs and Technologies
Available as eBook only
This document seeks to collect into one place current and new technologies about, or related to, sewerage system design so that wastewater...
Transforming Our Cities: High-Performance Green Infrastructure
Traditional approaches to stormwater management include construction of large, centralized end-of-pipe or interceptor solutions that can be extraordinarily expensive. The goal of this research is...
Use of Enhanced Biological Phosphorus Removal for Treating Nutrient-Deficient Wastewater
Anaerobic/aerobic (AnA) and completely aerobic (CA) laboratory-scale sequencing batch reactors operating on an acetate- and casamino acids-based synthetic wastewater were used to...