sewer systems Articles

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Future-oriented further developments: wastewater heat utilization plants with a return on investment (ROI) of 2 - 6 years

by RABTHERM AG  (Mar. 9, 2015)

Sewage is dirty and stinks. Out of sniffing distance – out of mind. Up until the 1980s sewage was taboo and not given the attention it deserves. One cold winter morning in 1988, 23 years ago, Urs Studer stopped beside a steaming manhole cover and wondered how such a source of heat could go untapped. Ever since he has been dedicating himself ...

Are our Water Systems at Risk?

by British Columbia Water & Waste Association (BCWWA)  (Feb. 1, 2015)

Assessing the Financial Sustainability of BC’s Municipal Water and Sewer Systems Reliable water, sewer, and storm water systems are essential to public health, a clean environment, and a strong economy. But British Columbia’s systems may be at risk – aging infrastructure, growth, strengthened regulations, seismic risk, and ...

Modelling the impact of retention–detention units on sewer surcharge and peak and annual runoff reduction

by IWA Publishing  (Mar. 27, 2015)

Stormwater management using water sensitive urban design is expected to be part of future drainage systems. This paper aims to model the combination of local retention units, such as soakaways, with subsurface detention units. Soakaways are employed to reduce (by storage and infiltration) peak and volume stormwater runoff; however, large ...

Simplifying impact of urban development on sewer systems

by IWA Publishing  (Dec. 15, 2014)

Linking urban development and urban drainage models is a more and more popular approach when impacts of pavement of urban areas on sewer system performance are evaluated. As such an approach is a difficult task, this is not a feasible procedure for everyday engineering practice. We propose an alternative method, based on a developed simple ...

Sewer Construction Bid

by IWA Publishing  (Dec. 8, 2014)

Advanced or tertiary wastewater treatment tries to remove all the impurities from the wastewater to produce almost drinking quality effluents. However, this is an expensive process requiring high level technical expertise, resources and machinery. Finally, disinfection of the treated wastewater may be carried out to destroy harmful bacteria and ...

Courtyard-level sewer data-enhanced two-dimensional hydraulic model for urban flood hazard assessment in Kunming, China

by IWA Publishing  (Feb. 6, 2015)

This paper describes a study of urban flooding in downtown Kunming, China, simulating a major flood event that occurred in July 2008 using an improved two-dimensional (2D) hydraulic model enhanced with courtyard-level sewer data (CLSD). Although municipal authorities are not responsible for ‘private’ courtyard sewers, available ...

Quick and accurate Cellular Automata sewer simulator

by IWA Publishing  (Nov. 10, 2014)

As urbanisation and climate change progress, the frequency of flooding will increase. Each flood event causes damage to infrastructure and the environment. It is thus important to minimise the damage caused, which can be done through planning for events, real-time control of networks and risk management. To perform these actions, many different ...

Alternative Water Supply Systems

by IWA Publishing  (Jan. 24, 2015)

Alternative Water Supply Systems covers technical, social, financial and institutional aspects associated with decentralized alternative water supply systems. These include systems for greywater recycling, rainwater harvesting, recovery of water through condensation and sewer mining. A number of case studies from the UK, the USA, Australia and the ...

Green–blue water in the city: quantification of impact of source control versus end-of-pipe solutions on sewer and river floods

by IWA Publishing  (Dec. 15, 2014)

Urbanization and climate change trends put strong pressures on urban water systems. Temporal variations in rainfall, runoff and water availability increase, and need to be compensated for by innovative adaptation strategies. One of these is stormwater retention and infiltration in open and/or green spaces in the city (blue–green water ...

Optimise inlet condition and design parameters of a new sewer overflow screening device using numerical model

by IWA Publishing  (Dec. 15, 2014)

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 ...

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