sewer collection Articles

  • Modeling fats, oil and grease deposit formation and accumulation in sewer collection systems

    Fats, oil and grease (FOG) deposits in sewer systems are responsible for approximately 25% of all annual line blockages in the United States and lead to the release of 3–10 million gallons of untreated wastewater to the surrounding environment. Considerable effort has been made to maintain the conveyance of wastewater by cleaning pipes that have a significant FOG deposit accumulation. Changes ...


    By IWA Publishing

  • Oil recovery reduces sewer cleaning

    Doskocil Food Service Company, a division of Foodbrands America, Hutchinson, Kan., produces 2 million pounds of pizza toppings a week. After cooking, the meat toppings are flash-frozen in one of two spiral freezers. Air currents within the freezer carry grease-containing vapors through the ammonia freezer coils, where they adhere and become lodged. Doskocil uses 1,600 gallons of water per hour to ...


    By Oil Skimmers, Inc.

  • Using InfoNet to manage a planned sewer maintenance program

    OnSite is a framework contractor for Severn Trent Water, one of the ten water service companies of England and Wales. The company is one of the project coordinators for the utility’s planned sewer maintenance programme and one of three framework contractors working in very close collaboration on its CCTV survey and sewer cleansing program. In addition the company undertakes man-entry surveys, ...


    By Innovyze

  • Sewer Siphon Assessment and Air Jumper Design

    ABSTRACTIn response to customer complaints about sewer odor, Orange County Sanitation District (OCSD), California launched a project to investigate the ventilation requirements of existing sewer siphons, to verify adequacy of existing air jumper operation, and determine the need for new air jumpers or additional air jumper capacity. The challenge was assessing sewer siphon air jumper adequacy ...

  • Ready or not: The Changing Nature of Collection Systems Oversight

    ABSTRACT The collection and conveyance of sanitary wastewater is a principal tenet of sanitary engineering that has helped move developed countries into the modern urban age. The focus of collection system agencies has historically been to convey wastewater to treatment facilities. The operational practices of these agencies have generally been geared toward infrastructure maintenance and ...

  • Report to Congress: Combined Sewer Overflows to the Lake Michigan Basin

    The U.S. Environmental Protection Agency (EPA) is transmitting this Report to Congress on combined sewer overflows (CSOs) in the Lake Michigan basin. CSOs can occur in combined sewer systems (CSSs), which are defined as collection systems that carry both wastewater and storm water in the same pipe. A CSO is defined as “the discharge from a CSS at a point prior to the publicly-owned treatment ...

  • Case study - Shopping center avoids litigation by resolving sewer odor problems

    Mazzei Injector Company, LLC is a recognized industry leader in gas to liquid mass transfer primarily from its proven 25 year experience with ozone applications. In addition, Mazzei has installed the same patented Venturi injector and mixing nozzle technology in many municipal and industrial wastewater systems in applications at lift stations, equalization tanks, aeration basins, activated sludge ...

  • City of Slidell’s drainage and sewer system recovery efforts following Hurricane Katrina

    Hurricane Katrina and its aftermath damaged the drainage and the sewerage collection system in the City of Slidell (City), creating health and safety issues for both the general public and emergency/recovery personnel working in the city. The efforts by the City in restoring these systems were critical to making the city safe and functional for the return of its citizens. This paper will try and ...

  • Maximazing Operational Capacity for Outfall Sewers through Innovative Design

    ABSTRACTThe City of Lincoln, Nebraska has undertaken a strategy to accelerate development of infrastructure systems for critical areas of the community, with the goal of nearly doubling the development rate for those areas. The Little Salt Creek drainage basin is a growing service area which includes over 3,000 acres of developed land and ultimately 5,300 acres in all. The majority of the ...

  • Los Angeles Collection System Agreement: a Win-Win Partnership & Success Story

    ABSTRACT During February 1998, the wettest February in Los Angeles’ history, sanitary sewer overflows (SSOs) occurred in a number of communities with the majority occurring in the Eagle Rock and South Los Angeles areas. In response to these SSOs, the Santa Monica Baykeeper (BayKeeper) filed a Federal lawsuit against the City asking for injunctive relief due to the SSOs. In January 2001, the ...

  • 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 ...

  • 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 ...


    By Pure Technologies

  • Determining Water Quality Impacts of Combined Sewer Overflow on the Mississippi River Using Full Factorial Analysis

    ABSTRACTThe City of Rock Island, Illinois is completing a Combined Sewer Overflow Long Term Control Plan as part of a Consent Decree with the U.S. EPA. The Consent Decree includes a requirement that Rock Island document existing water quality so that CSO impacts could be identified and potential improvements with various CSO could be assessed. Because of complex river morphology, large flow rate ...

  • 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 ...


    By WesTech Engineering, Inc.

  • 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 ...

  • How Much Could You Save by Avoiding a Consent Decree?

    In 2012, St. Louis, MO (Metropolitan St. Louis Sewer District) set a record for the most expensive sewer consent decree in history at $4.7 BILLION to be spent over the next 23 years. The cause of this consent decree and the cause of most consent decrees are overflow events that allow untreated waste into the nearby lakes, streams, river, or other nature areas. There are typically two types of ...


    By EnTech Engineering, Inc

  • Field campaign on sediment transport behaviour in a pressure main from pumping station to wastewater treatment plant in Berlin

    As part of the project KURAS, the Berliner Wasserbetriebe realized a field campaign in 2015 in order to increase the process knowledge regarding the behaviour of transported sediment in the pressure main leading from the pumpstation to the wastewater treatment plant. The field campaign was conducted because of a lack of knowledge about the general condition of the pressure main due to its bad ...


    By IWA Publishing

  • CMOM set to clean up in the USA

    Regulatory pressure on public utilities is a regular occurrence around the world, but some requirements are fundamental enough to effect a major change in the way an industry performs. The CMOM program for sewer collection utilities in the USA promises to be such an initiative. Its impact will be profound, as Tom Davies, President of Wallingford Software Inc, explains in this article. The CMOM ...


    By Innovyze

  • Reduction of Solvent Use in Cleaning of Printing Screens: Cutler Brands

     The installation of new cleaning equipment at Cutler Brands printing works in Adelaide, South Australia, has resulted in a 40 percent reduction in cleaning solvent used and an annual saving of almost $165,000. Not only was the investment of $45,000 recouped in 4 months through savings and increased productivity, but exposure of employees to hazardous fumes and chemicals substantially ...


  • Who Says Charity has to Cost Money?

    It is a rare and delightful occurrence when altruistic motives and the quest for profit coincide in such a way that following one begets the other.  The reuse and recycling of waste water is just such a project, especially in industrial applications replacing municipal potable drinking water supplies.  When one considers the fact that more than a billion people in the world are without ...

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