Sewer Monitoring Articles

  • Numerical modeling on sediment capture in catch basins

    Catch basins are designed to convey surface runoff into sewer systems. They are also found to be effective in retaining sediments. A number of factors can influence catch basin sediment capture efficiency, such as sediment size distribution, flow hydraulics and catch basin design. To better understand the influence of these factors, numerical simulations using the Eulerian-Lagrangian method ...


    By IWA Publishing

  • Vacuum sewerage systems – a solution for fast growing cities in developing countries?

    Developed more than a century ago, the potential of vacuum sewerage systems remains underexploited. At the same time, the rapid urbanization in Asia brings about major challenges for municipal utilities. In this context, the GIZ (Deutsche Gesellschaft fuer Internationale Zusammenarbeit) project ‘Integrated Resource Management in Asian Cities: the Urban Nexus’ gives technical advice to ...


    By IWA Publishing

  • Release of hydrogen sulfide under intermittent flow conditions – the potential of simulation models

    For engineering purposes it is especially useful to be able to predict and control sewer corrosion rates and odor impacts as well as to design effective measures aiming to reduce effects related to hydrogen sulfide formation and release. Doing so, it is important to use modeling tools that are capable of assessing variations of dissolved oxygen, dissolved sulfide and hydrogen sulfide gas ...


    By IWA Publishing

  • Site acceptance test 12 inch sewer bypass pumps

    Following a European call for tender during the summertime, we were awarded the contract to supply several sewage and flood control pumps. One of the key requirements was an official SAT (Site Acceptance Test). Recently, we successfully completed the first delivery of 12 inch sewage pumps including piping. This video shows how easy it is to set up the complete installation.  Some of the key ...


    By BBA Pumps North America

  • Effect of Doppler flow meter position on discharge measurement in surcharged manholes

    Determining the proper installation location of flow meters is important for accurate measurement of discharge in sewer systems. In this study, flow field and flow regimes in two types of manholes under surcharged flow were investigated using a commercial computational fluid dynamics (CFD) code. The error in measuring the flow discharge using a Doppler flow meter (based on the velocity in a ...


    By IWA Publishing

  • Picking the right Sewer Camera

    Sewer camera models are pretty straightforward, in most cases. But, there are many options if you want a sewer camera or commonly called snake camera. This type comes many varieties: Pipe Inspection camera with viewing capabilities only, sewer ...


    By USA Borescopes

  • Measuring Wastewater Below Ground

    Measuring wastewater is one of the most difficult water management tasks that exists. While some wastewater flows are easy to access, others are very hard to measure because they are in open channel conditions and are below grade. If you need to measure below ground wastewater flow, there are a few factors that you need to consider to help you choose the right tool for the job. With a ...


    By TRACOM Inc.

  • Adapted optimization model for planning regional wastewater systems: case study

    Wastewater systems are of crucial importance to the promotion of sustainable development. Through an integrated planning approach, the costs can be minimized and the resulting benefits maximized. A planning approach at regional level exploits the economies of scale, while achieving a better environmental performance. In this paper we set out a decision support approach for the planning of ...


    By IWA Publishing

  • Numerical modelling of air-water flows in sewer drops

    The presence of dissolved oxygen (DO) in water flows is an important factor to ensure the aerobic conditions recognised as beneficial to preventing the occurrence of detrimental effects. The incorporation of DO in wastewater flowing in sewer systems is a process widely investigated in order to quantify the effect of continuous reaeration through the air-liquid interface or air entrained due to ...


    By IWA Publishing

  • Monitoring accumulation sediment characteristics in full scale sewer physical model with urban wastewater

    A series of experiments were carried out with real wastewater in a pilot flume located at A Coruña wastewater treatment plant (WWTP) (Spain). A full scale model was developed to test a circular (300 mm inner diameter) and an equivalent area egg-shaped plastic pipe under controlled experimental conditions (pipe slope 2–5‰, averaged discharge Q = 4 L/s). Velocity profiles and sediment ...


    By IWA Publishing

  • 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

  • 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

  • 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.

  • Condition assessment program continues in North Queensland

    Justification of an ongoing condition assessment program can, at times, be difficult for water utilities. However, successful inspections that deliver actionable outcomes on how to manage aging assets make this justification much easier. Certainly that was the case for Mackay Regional Council (MRC) when it engaged the services of ...

  • How do You Know When You Need Commercial Plumbers

    In your day-to-day routine, either at home or at your business, the plumbing doesn’t get much attention. That is, until it starts showing warning signs of problems via sinks, tubs, and shower stalls not draining, toilets not flushing, or sewage backing up into your basement. It’s true you can buy drain openers and cleaners in the hardware store or even in the grocery store, but these ...


    By Tric Tools, Inc.

  • 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

  • Will greywater reuse really affect the sewer flow? Experience of a residential complex in Al Ain, UAE

    Reuse of recycled wastewater is one of the most feasible unconventional urban water sources in the United Arab Emirates (UAE). The extraction and reuse of greywater might affect the water and sewer pipe networks by changing flow characteristics. Therefore, the research question is how much greywater can be reused without affecting the existing water and sewer pipe networks? A residential ...


    By IWA Publishing

  • Robot Device for Pipe Inspection - Case Study

    In 2005, Pure Technologies (Pure), a provider of various structural monitoring and leak-detection technologies, set about to develop a pipeline assessment tool that could monitor and report on the condition of pre-stressed concrete cylinder pipes (PCCP) utilized in municipal water and sewer systems. The tool’s competitive advantage would be accurate assessment decoupled from the need to ...

  • Valuing information for sewer replacement decisions

    Decision-making for sewer asset management is partially based on intuition and often lacks explicit argumentation, hampering decision transparency and reproducibility. This is not to be preferred in light of public accountability and cost-effectiveness. It is unknown to what extent each decision criterion is appreciated by decision-makers. Further insight into this relative importance improves ...


    By IWA Publishing

  • Effect of Enhanced Biochemical Processes in the Sewer Collection System on Influent Wastewater Characteristics and Wastewater Treatment Plant Performance

    Short Abstract (less than 100 words) In-Pipe Technology (IPT) employs sewer collection system bioaugmentation treatment to enhance the sewer biochemical processes by improving the microbiology in the collection system, and provides improved microbiology to the wastewater treatment plant (WWTP). In this presentation, the effect of IPT sewer collection system bioaugmentation on sewer ...

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