Sewer Infrastructure Articles

  • Sewer Lift Station - Case Study

    Client: The City of Phoenix Facility:  A sewer Lift Station (LS) located directly adjacent  to a residence. (LS 48) Problem: The impact of facility safety and maintenance were main concerns. Decision: The client chose to replace a chemical scrubber with a BOHN BIOFILTER system. ...

  • Crumbling Concrete Water Networks Linked to Common Water Treatment Additive

    Concrete distribution and sewer networks are being corroded at an alarming rate partly because of a commonly used additive in the domestic drinking water and wastewater treatment process according to published reports in the journal Science. In countries throughout the world from industrialized nations like Australia and the USA to developing nations like Colombia, Ghana and the Philippines, the ...

  • Modelling the Thatcham Flood - Case Study

    Overview On 20th July 2007, an unusual storm swept west across England along the approximate line of the M4 motorway. Thatcham, a town in Berkshire, was one of the worst affected. Many towns in England flooded that month from the Humber to Tewksbury. In fact there were 200 major floods worldwide in 2007 affecting 180 million people. Some of these floods were caused by rainfalls much more ...


    By XP Solutions

  • City Of North Bay Uses Condition Assessment On Critical Force Main To Implement Asset Management Plan

    On one hand, it may seem like a waste of capital dollars if you perform a pipeline condition assessment and the final analysis turns up no leaks. Alternatively, you can also look at the no-leak report as a good news validation story, especially when using the information to help establish an asset management ...


    By Pure Technologies

  • 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

  • Application of batch tests to assess antibiotic loads in anaerobic processes

    The presence of antibiotics in drinking water and wastewater has not been widely studied because the sanitary engineering sector mainly focuses on the removal of organic matter and nutrients. There is a lack of environmental regulations for pollutants like antibiotics. Batch tests analyse biodegradability to measure the anaerobic degradation potential of the substrate, or they can be used as ...


    By IWA Publishing

  • History of sanitation and hygiene technologies in the Hellenic world

    Sanitation and hygiene technologies have existed in ancient Hellas since the Bronze Age (ca. 3200–1100 bc), when extensive sewerage and drainage and other elaborate sanitary structures were known in Minoan palaces and towns. Classical and Hellenistic periods should be considered as the most progressive eras in the design of sanitary engineering. At that time anatomically shaped ...


    By IWA Publishing

  • Different erosion characteristics of sediment deposits in combined and storm sewers

    To investigate the different erosion patterns of sediments in combined and storm sewers, sediments from three separate sewer systems and two combined sewer systems in urban Shanghai were collected for the flushing experiments. These experiments were conducted with different consolidation periods and shear velocities. As the consolidation period increases, dissolved oxygen exhibits a positive ...


    By IWA Publishing

  • Sulfide emissions in sewer networks: focus on liquid to gas mass transfer coefficient

    H2S emission dynamics in sewers are conditioned by the mass transfer coefficient at the interface. This work aims at measuring the variation of the mass transfer coefficient with the hydraulic characteristics, with the objective of estimating H2S emission in gravity pipes, and collecting data to establish models independent of the system geometry. The ratio between the H2S and ...


    By IWA Publishing

  • Impacts of onsite greywater reuse on wastewater systems

    Together with significant water savings that onsite greywater reuse (GWR) may provide, it may also affect the performance of urban sewer systems and wastewater treatment plants (WWTPs). In order to examine these effects, an integrated stochastic simulation system for GWR in urban areas was developed. The model includes stochastic generators of domestic wastewater streams and gross solids ...


    By IWA Publishing

  • How bursting head technology is useful in sewer pipe replacement?

    If you are worried that replacing a sewer pipe is going to be a nightmare, let me put your mind at ease. Gone are the days when replacing a sewer pipe meant tearing up your home or the whole front yard. With the latest technology in trenchless sewer replacement, you can get your sewer pipe replaced without any major construction work. The technology that is used today is called ‘ ...


    By TRIC Tools Inc.

  • Preventing sinkholes: avoiding costly repairs

    Examining the causes of sinkholes and how Deep Trekker is aiding in preventing costly repairs and unwarranted closures. When it comes to preventing sinkholes, we must first understand how and why they appear. Armed with this knowledge, we can then take proper action to thwart the sudden appearances of these, costly craters. Sinkholes slowly develop over time in and around areas ...


    By Deep Trekker Inc.

  • Release of hydrogen sulfide in a sewer system under intermittent flow conditions: the Eiceira case study, in Portugal

    The presence and fate of hydrogen sulfide in wastewater systems were studied in two stretches of an intercepting sewer system located in a coastal village, in Portugal. A range of hydraulic parameters were obtained and liquid and gas phase measurements were carried out, both continuously and through intensive sampling campaigns. Upstream, where flow rates were relatively low, dissolved sulfide ...


    By IWA Publishing

  • Five common problems with zero liquid discharge and how to solve them

    As more and more facilities are turning to zero liquid discharge (ZLD) for wastewater treatment and effluent reduction—whether it’s to comply with local discharge regulations or recycle and reuse as much water as possible in your process—more information is becoming available about the possible issues your facility might face while using ZLD technology. Because of the scope of ...


    By SAMCO Technologies, Inc.

  • Important Steps Of Trenchless Pipe Bursting In Alameda?

    Homeowners should ask themselves whether or not they know about the important steps of trenchless pipe bursting in Alameda? Pipe bursting is one of the two primary methods of trenchless sewer line repair that people are going to use. Pipe lining is the other primary method, and pipe lining is a popular one as well. However, many professional plumbers are going to use pipe bursting, particularly ...


    By TRIC Tools Inc.

  • Influence of relative air/water flow velocity on oxygen mass transfer in gravity sewers

    Problems related to hydrogen sulfide may be serious for both network stakeholders and the public in terms of health, sustainability of the sewer structure and urban comfort. H2S emission models are generally theoretical and simplified in terms of environmental conditions. Although air transport characteristics in sewers must play a role in the fate of hydrogen sulfide, only a limited number of ...


    By IWA Publishing

  • Australian-made technology renews Sydney's oldest sewers

    Like all large cities around the world, Sydney's major underground sewers are deteriorating through age and reaching the end of their service life. To succeed in its vision to be the lifestream of Sydney for generations to come, Sydney Water's active sewer renewals program needs to renew underground sewers beneath heavily populated and environmentally sensitive areas. One of Sydney Water's ...


    By IWA Publishing

  • Connections: Toasty Toes

    After 14 years of living on a houseboat we have now moved into an apartment in a private home. There are many wonderful things about this apartment - the lack of dry rot and any concerns about the wind direction are two of them. Perhaps my favorite is the radiant floor heat. Radiant heat, hot water piped under the floors, keeps your toes and the rest of your body toasty. Water is great for this ...


    By BioCycle Magazine

  • Investigating the interactions of decentralized and centralized wastewater heat recovery systems

    In the urban water cycle there are different sources for extracting energy. In addition to potential and chemical energy in the wastewater, thermal energy can also be recovered. Heat can be recovered from the wastewater with heat exchangers that are located decentralized and/or centralized at several locations throughout the system. It can be recovered directly at the source (e.g. in the ...


    By IWA Publishing

  • When to Rent or Buy Tric Plumbing Equipment

    Without any doubt, Tric plumbing equipment is a new era in tric tools. So, what do the letters Tric stand for? They are used to mention trenchless plumbing equipment specially invented for the pipe bursting process that gave birth to the today trenchless home sewer replacement industry. Where should I rent or buy Tric plumbing equipment? Today, autonomous sewer ...


    By TRIC Tools Inc.

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