Combined Sewer Overflow Technology Articles

Constructed wetlands for combined sewer overflow treatment in a Mediterranean country, Portugal

The use of constructed wetlands as a valuable and attractive method for combined sewer overflow (CSO) treatment has been demonstrated in several studies. In Portugal, a Mediterranean country having usually a long dry period, there are still no applications of this technology. The purpose of this research is to gather information and know-how required for the design and management of this type of ...

Jun. 21, 2013

By IWA Publishing

Modelling sewer sediment deposition, erosion, and transport processes to predict acute influent and reduce combined sewer overflows and CO2 emissions

Understanding of solids deposition, erosion, and transport processes in sewer systems has improved considerably in the past decade. This has provided guidance for controlling sewer solids and associated acute pollutants to protect the environment and improve the operation of wastewater systems. Although measures to decrease combined sewer overflow (CSO) events have reduced the amount of ...

Nov. 1, 2010

By IWA Publishing

Innovative technologies for management of stormwater and combined sewer flows

Stormwater flows have historically been considered as harmless. Studies have shown that these flows cannot be dismissed as easily. Chebbo (1992), Marsalek et al.,(1997) and others have shown that stormwater is a source of diffuse pollution with a high source of total suspended solids (TSS), adsorbed hydrocarbons (HC) and nutrient loads (N, P, etc..). All these factors influence the quality of the ...

May 8, 2009

By Veolia Water Technologies Canada (Veolia Water Solutions & Technologies)

Impact of Water Quality and Pretreatment upon UV Inactivation of MS-2 Bacteriophage in Combined Sewer Overflow

The disinfection of MS-2 bacteriophage by low pressure and medium pressure UV was evaluated in three different source waters: raw wastewater, storm water runoff and a synthetic combined sewer overflow prepared from a 50:50 mix of raw wastewater and storm water runoff. Each of the source waters were pretreated by dissolved air floatation and vortex separation prior to UV exposure. Source water and ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Combined Sanitary Sewer Overflows (SSO) - Performance Focus: Fats, Oil and Grease (FOG) Reductio Case Study

In-PIpe Technology Company, Inc., drastically accelerates the natural degradation of fats, oil and grease (FOG) in the collection system, thereby removing blockages and occlusions from the pipe and significantly reducing the occurrence of FOG-related sewer overflows, as well as the requisite equipment and manpower required for the physical removal of these blockages. Since In-Pipe started ...

Mar. 2, 2016

By In-Pipe Technology Company, Inc.

World’s largest compressible media filtration plant eliminates combined sewer overflows, with potential for dry-weather use

The City of Springfield, Ohio, recently opened its 100 MGD enhanced high-rate treatment facility, designed to treat and disinfect combined high-volume stormwater and wastewater flows generated by wet-weather conditions. Utilizing EPA-documented Compressible Media Filtration technology – FlexFilter™ from WesTech – the system can also provide tertiary filtration and disinfection ...

Mar. 22, 2016

By WesTech Engineering, Inc.

Reducing Ruptured Reputations – Assessment Tools Reduce Risk of Failure on Sewer Force Mains

A ruptured sewer pipe can attract a lot of unwanted attention, even when it happens on private property. Last year, hours before celebrities were to arrive at the Golden Globes Awards show at the Beverley Hills Hotel, a reputed sewer pipe burst, spewing a mess of wastewater on the red ...

Aug. 6, 2015

By Pure Technologies - a Xylem brand

CSO Treatment Technologies: A Comprehensive Design and Resource Manual

Increasingly, municipal wastewater authorities are exploring new and innovative treatment technologies specifically designed for Combined Sewer Overflows (CSOs). These technologies, when applied as part of an overall wastewater management strategy, can produce efficient and cost-effective solutions for CSOs. However, like all technologies, theyrequire systematic design and proper operation. In ...

May 9, 2008

By XCG Consultants Ltd.

Alternative Disinfection Technology Demonstrates Advantages for Wet Weather Applications – A Pilot Study of Powdered Bromine Technology

A bromine disinfection technology currently utilized in Japan for Combined Sewer Overflow (CSO) disinfection was piloted by the City of Akron, Ohio. Bromochlorodimethylhydantoin (BCDMH) is a biocide in powdered form that, when dissolved in water, hydrolyzes to hypobromous acid, hypochlorous acid (the active biocides) and Dimethylhydantoin. This unique combination in active biocides can yield ...

Oct. 21, 2006

By Water Environment Federation (WEF)

The Challenge of the Future: Operating Emerging Disinfection Technologies

ABSTRACTThe Clean Water Act (1972 and 1977) established the basis for regulating pollutant discharges into the waters of the United States. This Act contains many provisions regulating pollutant discharges and surface water quality in the United States. This act has also been modified by numerous revisions and amendments since it was enacted in 1972. The National Pollutant Discharge Elimination ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Innovative Technology Provides Real Time Flow Data Management in Indianapolis

This paper presents the program developed by the City of Indianapolis for managing its sewer flow data and describes how it is making real-time information available to several groups that have a stake in the City’s environmental management programs. These groups include United Water, the contract operator for the City’s collection system and its two WWTPs, the Capitol Improvement Program ...

May 7, 2007

By Water Environment Federation (WEF)

Geotube technology provides solution for detroit river environmental cleanup - Case Study

The Largest Facility of Its Kind Under Construction In the Country PENDERGRASS, GA —A simple idea in environmental cleanup is saving the taxpayers of Detroit a Substantial amount of money while taking care of an important environmental cleanup project. The City of Detroit Water and Sewer Department (DWSD) is implementing Miratech's Geotube technology at its Conner Creek ...

Sep. 13, 2013

By TenCate Geosynthetics Netherlands bv

Side By Side By Side: The Evaluation of Three High Rate Process Technologies for Wet Weather Treatment

ABSTRACTMost large combined sewer communities face significant financial investment to address wet weather compliance issues. Innovative, cost-effective methods of dealing with wet weather flows is a must to prevent spiraling rate increases for rate payers. High rate clarification and high rate filtration systems are becoming the technology of choice for treating wet weather flows. The City of ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Using UV to Disinfect Low Quality Wastewater

This paper discusses the issues involved in sizing ultraviolet (UV) disinfection systems for low quality water, such as those found in poor quality wastewater (primary effluents) or wet weather flows (combined sewer overflows). Discussions of UV reactor dynamics and the merits of bioassay validation are ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Sanitation

Wastewater collection The standard sanitation technology in urban areas is the collection of wastewater in sewers, its treatment in wastewater treatment ...

Apr. 6, 2012

By IWA Publishing

Water management in cities of the future using emission control strategies for priority hazardous substances

Cities of the future face challenges with respect to the quantity and quality of water resources, and multiple managerial options need to be considered in order to safeguard urban surface water quality. In a recently completed project on ‘Source control options for reducing emissions of Priority Pollutants’ (ScorePP), seven emission control strategies (ECSs) were developed and tested within a ...

Jan. 1, 2011

By IWA Publishing

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 ...

Jan. 1, 2004

By Degremont Technologies - a subsidiary of Suez Environnement

10 Years Experience of CSO Management in the United Kingdom

ABSTRACTThe United Kingdom’s ageing sewerage infrastructure meant that by the late 20th century the country was facing a major environmental problem associated with storm sewage discharges from more than 8,000 unsatisfactory combined sewer overflows (CSOs). Addressing this problem presented a major challenge to the UK water industry, but it is a challenge that has been met by a combination of ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Evidence of a critical velocity in underflow baffle design for floatables in CSOs

Underflow baffles have gained in popularity over the last few years as a viable mean to intercept floatables in Combined Sewer Overflows (CSOs). This has happened in consideration of the extremely low application cost of the solution although the efficiency of underflow baffles has never been clearly proven. Furthermore, there are no guidelines helping planners in the correct and efficient design ...

Jun. 2, 2008

By Veolia Water Technologies North America

Survey monitoring results on the reduction of micropollutants, bacteria, bacteriophages and TSS in retention soil filters

A main source of surface water pollution in Western Europe stems from combined sewer overflow. One of the few technologies available to reduce this pollution is the retention soil filter. In this research project, we evaluated the cleaning efficiency of retention soil filters measuring the concentration ratio of standard wastewater parameters and bacteria according to factors limiting ...

Sep. 16, 2013

By IWA Publishing

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