sewer evaluation Articles
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Flow measurements in sewers based on image analysis: automatic flow velocity algorithm
Discharges of combined sewer overflows (CSOs) and stormwater are recognized as an important source of environmental contamination. However, the harsh sewer environment and particular hydraulic conditions during rain events reduce the reliability of traditional flow measurement probes. An in situ system for sewer water flow monitoring based on video images was evaluated. Algorithms to determine ...
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Improving the microbiological quality of the Ruhr River near Essen: comparing costs and effects for the reduction of Escherichia coli and intestinal enterococci
After rain events in densely populated areas, combined sewer overflows (CSOs) can have severe health-related effects upon surface water quality, as well as diffuse overland runoff and wastewater treatment plants (WWTPs). All of these sources emit pathogens and fecal indicator bacteria into the surface water, which the EU Bathing Water Directive addresses by giving threshold values for the ...
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Simulating organic pollutant flows in urban stormwater: development and evaluation of a model for nonylphenols and phthalates
Stormwater-quality models can be useful tools for predicting pollutant loads and identifying sources of contamination. Most models in current use handle pollutants such as metals, nutrients and suspended solids, whereas models including emerging organic contaminants are rare. This study aims at developing and evaluating a model for simulating stormwater flows of two groups of organic pollutants; ...
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High Rate Treatment of CSO/SSO Flows Using a High Density Solids Contact Clarifier/Thickener - Results from a Pilot Study
ABSTRACT A two-month pilot study was conducted at the Village Creek Wastewater Treatment Plant in Birmingham, Alabama to test the technical feasibility of utilizing a high-rate, highdensity solids contact clarification process for the treatment of sanitary sewer overflow (SSO). Five phases of testing were performed over the two-month period. During Phase I testing, optimum steady state operating ...
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Climate change: More intense rains could swamp Chicago`s aging sewers
In a city built on a swamp, where rainstorms already flood basements and force sewage into Lake Michigan and local streams, climate change could make Chicago's chronic water pollution woes even worse. Researchers hired by Mayor Richard Daley's office estimate that intense rainfall will happen more frequently in the not-so-distant future because of warming global temperatures, challenging the ...
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Oldcastle Helps Clean-Up Santa Monica with Panel Vault Cistern - Case study
Project Overview Surf’s up and clean in Southern California thanks to Oldcastle and the Santa Monica “Clean Beaches” stormwater cistern. Located at the base of the world-famous Santa Monica Pier, the Deauville basin will be used to harvest up to 1.6 million gallons of stormwater runoff from the pier’s downtown drainage basin. The harvested runoff will then be diverted ...
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