Sewer Overflow Articles

  • City of Ottawa Tackles System Overflow and Flooding with Tempest Inlet Controls Case Study

    Over the past few decades, rain events throughout North America have become more frequent and substantial. The combination of increased rain and outdated infrastructure has caused many municipality storm sewers and drainage systems to exceed capacity, resulting in flooding and additional expense. To cost-effectively mitigate the problem, municipalities are turning to the use of inlet control ...


    By IPEX, Inc.

  • Data Logging VS Monitoring

    As one of the largest US distributors of data logging and monitoring equipment, we receive hundreds of calls every year from users looking to put new systems in place. One of the first questions we ask is if “are looking for a monitoring system or data logging system?” And, it’s surprising how often they are confused as to what is really needed. Hopefully, by looking at the ...


    By CAS DataLoggers

  • OSU researchers deploy Stevens equipment in study of green infrastructure treatment for groundwater runoff - Case Study

    Stormwater runoff pollution is a serious issue that faces almost every urban and suburban environment. In older city infrastructure, runoff from roofs, parking lots, and streets flows directly into the sewer system and must be handled by the municipal wastewater treatment facility, increasing the amount of work the system must ...

  • What is a Mineral Thickener Tank

    The Thickener Tank is a solid-liquid separation device based on gravity sedimentation. It is usually a cylindrical shallow groove and a tapered bottom. It is made of concrete, wood or metal welded plates as a structural material. An excellent thickener brand needs to meet two basic indicators: good equipment quality and innovation. In addition ...

  • Don’t Just Replace a Check Valve, Upgrade It!

    Just over 300 miles northwest of Santa Monica, CA, where the world’s first marine outfall was installed in 1910, check valves are being re-designed and engineered for outfalls all over the world. Outfalls – which are essentially discharge points of a waste stream into rivers, drains, sewers, or other bodies of water – are located in thousands of places across the planet. Many of ...


    By Proco Products, Inc.

  • Los Andles & San Felipe WWTP Project - Case Study

    Customer: Geiger International GmbH (Germany) Project Name: Los Andles & San Felipe WWTP Manufacturing year: 2002 Scope of supply 2 pcs. Grit Scrapper 4 pcs. Circular Scrapper 2 pcs. ...


    By ASTIM A.S.

  • Nador WWTP Project - Morocco - Case Study

    Customer: OTV (France) Project Name: Nador WWTP Manufacturing year: 2006 Scope of supply 2 pcs. Ø 10,55 m. Central Driven Clarifier, scraping mechanism, completely St- 37 2 pcs. Ø 12m. ...


    By ASTIM A.S.

  • Alternative approach to improving operating flux of MBR

    Application of micro-filtration and ultra-filtration membranes for water reclamation has grown significantly in recently years due to lower foot print and stable product water quality. For membrane bioreactor (MBR) application, it is critical to improve the sludge quality to allow membrane systems to operate at higher flux without significant trans-membrane pressure (TMP) increase. It was ...


    By IWA Publishing

  • Extended CSO control storage: what could possibly go wrong?

    The Thames Tideway Tunnel (TTT), is one of the main components of the London Tideway Improvements Programme, designed to capture combined sewer overflows (CSOs) which currently discharge untreated combined sewage into the tidal river Thames. CSO discharges would be stored in the tunnel until there is capacity at Beckton sewage treatment works (STW), to accept, for treatment, pumped sewage from ...


    By IWA Publishing

  • Clarifier rehabilitation in Clermont, Canada - Case study

    CANADIAN PULP MILL CLARIFIER Rehabilitation & Protection From Chemical Attack When Resolute Forest Products was determining a solution for rehabilitation and protection of their 50,000 square foot concrete clarifier damaged from mild chemical attack and abrasion from their pulping process they contacted MBI Corexcel, a local corrosion-resistant specialized contractor, for ...


    By Sauereisen Inc.

  • What too much water can do to your collection systems

    In areas with a high water table, or for cities more prone to flooding, your underground infrastructure can become inundated with groundwater and stormwater. And despite stormwater systems being built for this type of collection, there are a number of things that can go wrong for both types of collection systems underground—and above ground—that can lead to contamination or degraded ...


    By Hamilton Kent

  • Cedar springs Presbyterian church parking improvements - Knoxville, Tennessee - Case Study

    The Cedar Springs Presbyterian Church low-impact parking improvements project began as an addition to meet the Church’s parking needs and to provide a new site entrance to improve access and traffic circulation within the Church campus. The desire to develop the property as good stewards and include “green” or sustainable design practices led to the decision for this 169 -space, ...


    By Presto Geosystems

  • Greenstreets@Counters Creek SuDs retrofit pilot study - Case Study

    London, UK Thames Water In Progress AECOM is leading Greenstreets@Counters Creek, a pilot study retrofitting a number of sustainable drainage systems (SuDs) into a range of streetscapes and communities in Central London. ...


    By Innovyze

  • 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 ...


    By IWA Publishing

  • Performance assessment of a vertical flow constructed wetland treating unsettled combined sewer overflow

    The performance of a vertical flow constructed wetland for combined sewer overflow treatment (CSO CW) has been evaluated. The full-scale site has been monitored for 3 years for major pollutants and for two load events for a range of micropollutants (metals, metalloids and polycyclic aromatic hydrocarbons (PAHs)). Performance were predominantly high (97% for total suspended solids (TSS), 80% ...


    By IWA Publishing

  • Rainfall effects on inflow and infiltration in wastewater treatment systems in a coastal plain region

    Aging wastewater collection and treatment systems have not received as much attention as other forms of infrastructure, even though they are vital to public health, economic growth, and environmental quality. Inflow and infiltration (I&I) are among potentially widespread problems facing central sewage collection and treatment systems, posing risks of sanitary system overflows (SSOs), ...


    By IWA Publishing

  • Flood water protection in the city of Buenos Aires - Case study

    The Arroyo Mendrano is the second largest channeled stream of water running through Buenos Aires. In case of heavy rainfalls it overflows its banks and causes considerable material damage. When the retention basin which had been especially built to collect large quantities of water during strong precipitation events also overflowed, the government decided to have an alarm-system installed to ...


    By OTT HydroMet

  • Distribution of mean flow and turbulence statistics in plunge pools

    When the capacity of the spillway of a dam is exceeded for a given flood, overtopping occurs; in such cases potentially dangerous hydrodynamic actions and scour downstream of the dam need to be foreseen. Detailed studies of jets impinging in plunge pools from overflow nappe flows are scarce. This work addresses plunge pool flows, and compares numerical results against our own experiments. The ...


    By IWA Publishing

  • Estimation of combined sewer overflow discharge: a software sensor approach based on local water level measurements

    Combined sewer overflow (CSO) structures are constructed to effectively discharge excess water during heavy rainfall, to protect the urban drainage system from hydraulic overload. Consequently, most CSO structures are not constructed according to basic hydraulic principles for ideal measurement weirs. It can, therefore, be a challenge to quantify the discharges from CSOs. Quantification of CSO ...


    By IWA Publishing

  • Techniques for Oil in Water Analysis

    The people responsible for conducting oil in water measurements understand that the measurement can be quite challenging. Wastewater from different sources can contain many different types of hydrocarbons, each with different chemical make-ups. On top of the lack of chemical uniformity in different oils, there has been a ...


    By Spectro Scientific

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