sewer overflow Articles
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Project - Northumbrian Water
Project Description Northumbrian Water provides water and sewerage services to 2.7 million people in the North East of England with 27,000 km of sewers and cleared 9500 blockages in 2019. StormHarvester and Northumbrian Water have worked together since early 2018 to analyse pumping chambers in Newcastle-Upon-Tyne in Northern England. This discrete network was chosen due to the location of ...
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SL-RAT at Little Rock Water Reclamation Authority - Case Study
Little Rock looked to enhance their sophisticated cleaning program and reduce sanitary sewer overflow count by implementing new ...
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EPA initiates strategic planning for priority enforcement areas, but key elements still needed
OECA has instituted a process for strategic planning in its national enforcement priority areas. It has developed strategic planning guidance and a strategy template to facilitate continual review and improvement of the strategies. The Fiscal Years 2008-2010 strategic plans we reviewed, for air toxics, combined sewer overflows, and mineral processing, contain an overall goal, a problem statement, ...
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Life cycle assessment of three water systems in Copenhagen–a management tool of the future
Environmental life-cycle assessment (LCA) was applied to evaluate three different water systems of the water sector in Copenhagen, Denmark, including technologies within water supply, facilities recycling water and treatment of sewer overflow. In these three water systems LCA was used to evaluate the environmental impacts of each of the processes involved. The overall conclusion was that LCA is ...
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Optimise inlet condition and design parameters of a new sewer overflow screening device using numerical model
After heavy rainfall, sewer overflow spills to receiving water bodies cause serious concern for the environment, aesthetics and public health. To overcome these problems this study investigated a new self-cleansing sewer overflow screening device. The device has a sewer overflow chamber, a rectangular tank and a slotted ogee weir to capture the gross pollutants. To design an efficient screening ...
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Black & Veatch to design sewer/stormwater facilities for Cincinnati
Black & Veatch (Overland Park, KS) announced that it has received a contract to design a $244 million tunnel system, pump station, and treatment facility in Cincinnati, Ohio, to help the city better manage its sewage and stormwater flows. The company said that it is currently conducting geotechnical investigations to determine the location and route of the Lower Mill Creek Tunnel, which ...
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Life cycle assessment of three water systems in Copenhagen - a management tool of the future
Environmental life-cycle assessment (LCA) was applied to evaluate three different water systems of the water sector in Copenhagen, Denmark, including technologies within water supply, facilities recycling water and treatment of sewer overflow. In these three water systems LCA was used to evaluate the environmental impacts of each of the processes involved. The overall conclusion was that LCA is ...
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Development and testing of a new design procedure for the control of aesthetic pollutants at combined sewer overflows
ABSTRACTTwo research projects identified the need for a new design guide and software to facilitate the design of combined sewer overflows. The purpose of the design guide and software is to enable the selection of the most cost effective arrangement of overflow and screens according to local circumstances. Strategies were developed to minimise the risk of those testing the design guide and ...
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An application of Austrian legal requirements for CSO emissions
The Austrian standard for designing combined sewer overflow (CSO) detention basins introduces the efficiency of the combined sewer overflows as an indicator for CSO pollution. Additionally criteria for the ambient water quality are defined, which comprehend six kinds of impacts. In this paper, the Austrian legal requirements are described and discussed by means of hydrological modelling. This is ...
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Experimental study of the performance of a siphon sediment cleansing set in a CSO chamber
Model experiments were conducted to investigate the performance of a siphon sediment cleansing set (SSCS) for preventing sediment deposition on the combined sewer overflow (CSO) chamber bottom. The results confirmed the effectiveness of siphon suction in sediment removal in the chamber. The sediment scour test revealed that the equilibrium scour depth correlated significantly with the ...
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ACTIFLO® Clarifiers to Treat Sanitary Sewer Overflow in Lawrence, KS WWTP
The ACTIFLO Process was evaluated as an alternative for sanitary sewer overflow (SSO) treatment at the City of Lawrence, Kansas's wastewater treatment plant (WWTP). Prior to implementation of the ACTIFLO Process and expansion of the existing biological treatment trains, the facility struggled with handling wet weather events that exceeded the 9 MGD (average) or 18 mgd (peak) flow ...
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Project - Two Decades Repairing San Diego Sewers
Program Background The City of San Diego’s Metropolitan Wastewater Division has been rehabilitating their deteriorated sewers for nearly twenty years. This program however was not completely voluntary. The City entered a Consent Decree with the Environmental Protection Agency in 2001 to address the chronic problem of sanitary sewer spills. Before 2000, the city had hundreds of sewer ...
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Washoff behavior of in-sewer deposit in combined sewer system through artificial flushing experiment
In-sewer deposits in combined sewer systems (CSSs) are closely related with the behavior of first foul flush and combined sewer overflows. However, the research paying attention to the role of in-sewer deposits is quite rare, furthermore, their contributions for the washoff patterns of each pollutant including pathogenic microorganisms are almost never discussed so far. The artificial flushing ...
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Research of trace metals as markers of entry pathways in combined sewers
Combined sewers receive high toxic trace metal loads emitted by various sources, such as traffic, industry, urban heating and building materials. During heavy rain events, Combined Sewer Overflows (CSO) can occur and, if so, are discharged directly into the aquatic system and therefore could have an acute impact on receiving waters. In this study, the concentrations of 18 metals have been ...
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Evaluation of effectiveness of combined sewer overflow control measures by operational data
The effect of combined sewer overflow (CSO) control measures should be validated during operation based on monitoring of CSO activity and subsequent comparison with (legal) requirements. However, most CSO monitoring programs have been started only recently and therefore no long-term data is available for reliable efficiency control. A method is proposed that focuses on rainfall data for ...
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Sanitation
Wastewater collection The standard sanitation technology in urban areas is the collection of wastewater in sewers, its treatment in wastewater treatment plants for reuse or disposal in rivers, lakes or the sea. Sewers are either combined with storm drains or separated from them as sanitary sewers. Combined sewers are usually found in the central, older parts or urban areas. Heavy rainfall and ...
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Emission predictions with a multi-linear reservoir model
ABSTRACTFor the assessment of combined sewer overflows detailed models are not necessary. Physically based conceptual models give an optimal balance between model uncertainty and uncertainty in the input data. Besides, it is important that continuous long term simulations are performed. To prove this, in this paper the calibration of a reservoir model is discussed. The emission results of the ...
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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 ...
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Determination of the vertical velocity distribution of floatables in CSOs
ABSTRACTControl of floatables, since April 1994, is one of the nine minimum controls required by the U.S.EPA (United States Environmental Protection Agency) for CSO (Combined Sewer Overflows) control policy compliance. Municipalities must control and intercept floatables at their overflow sites. Efficient interception of these floatables requires prior characterisation. To accomplish this ...
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EMS’ Marco Eulogi submits PhD thesis on benefits of the CENTAUR system
EMS’ Marco Eulogi recently submitted his PhD thesis, in which he demonstrated the benefits of the CENTAUR system through simulations. CENTAUR is a local real-time control (RTC) system, capable of mitigating urban flooding and combined sewer overflow spills. Marco successfully demonstrated the potential benefits of urban drainage systems, in increasing network performance to avoid spills, ...
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