Climate Change and Urban Water Utilities: Challenges and Opportunities

The following P-note summarizes key points of the Working Water Note 24, Climate Change and Urban Water Utilities: Challenges and Opportunities, by Alexander Danilenko, Eric Dickson, and Michael Jacobsen. The document was published in 2010 by the Water Sector Board of the World Bank Sustainable Development Network. Readers may download the complete document from www.worldbank.org/water

 

Nitrogen and Phosphorus Recovery from Wastewater

The article presents a review and description of technologies for recovering Nitrogen and Phosphorus from a waste water stream. The work outlines the theoretical mechanism, concepts and results of each method.

WASTEWATER TREATMENT AND DISCHARGE – Danish Center for Environment and Energy

This report presents the status of methodological development within the sub-sector 5.D Wastewater treatment and discharge. Focus of the report is to present a COD (Chemical Oxygen Demand) mass balance for the Danish wastewater treatment plants, verifying the country-specific methane emis- sion factor, and the resulting level of methane emission from anaerobic sludge digestion, at the Danish wastewater treatment plants (WWTP). The latter requested for by the UNFCCC expert review team.

Pressure-driven demand and leakage simulation for water distribution networks

A novel steady-state network simulation model that fully integrates, into a classical hydraulic representation, pressure-driven demand and leakage at the pipe level is developed and presented here. After presenting a brief literature review about leakage modelling, the importance of a more realistic simulation model allowing for leakage analysis is demonstrated. Then, the algorithm is tested from a numerical standpoint and subjected to a convergence analysis. These analyses are performed on a case study involving two networks derived from real systems. Experimentally observed convergence/error statistics demonstrate the high robustness of the proposed pressure-driven demand and leakage simulation model.

Urban water networks as an alternative source for district heating and emergency heat-wave cooling

Three emergency cold recovery techniques are presented as a response to heat-waves: subway station cooling, ice production for individual cooling, and “heat-wave shelter” cooling in association with pavement-watering. The cold generation potential of each approach is assessed with a special consideration for mains water temperature sanitary limitations. Finally, technical obstacles and perspectives are discussed.

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