Water and Energy

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Water and Energy ( water-and-energy )

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23 global water use for energy production by scenario 800 600 400 200 0 Current Policies Scenario 2010 2020 New Policies Scenario 2035 450 Scenario Consumption 24 Energy requirement to deliver 1 m3 water safe for human consumption from various water sources Lake or river: 0.37 kWh/m3 Groundwater: 0.48 kWh/m3 Wastewater treatment: 0.62–0.87 kWh/m3 Wastewater reuse: 1.0–2.5 kWh/m3 Seawater: 2.58–8.5 kWh/m3 Source: WWAP, with data from IEA (2012). IEA (International Energy Agency). 2012. World Energy Outlook 2012. Paris, OECD/IEA. Note: This diagram does not incorporate critical elements such as the distance the water is transported or the level of efficiency, which vary greatly from site to site. Source: WBSCD (2009, fig. 5, p. 14, based on source cited therein). WBCSD (World Business Council on Sustainable Development). 2009. Water, Energy and Climate Change: A Contribution from the Business Community. Geneva, WBCSD. http://www.wbcsd.org/pages/ edocument/edocumentdetails.aspx?id=40&nosearchcontextkey=true 25 Indicative energy use of municipal water and wastewater services Energy using activity Water supply Raw water extraction Treatment Clean water transmission and distribution Indicative share Surface water: 10% Groundwater: 30% Surface water: 80% Groundwater: 69% Comments Pumping Building services Pumping Dependent on the share of gravity-fed water supply Dependent on the share of gravity-induced collection Mostly for aeration of wastewater Energy can be produced in sludge processing Mixing Other treatment processes Pumping (for backwash etc.) Water sludge processing and disposal Building services Surface water: 10% Groundwater: 1% Wastewater management (activated sludge treatment process) Wastewater collection Treatment Sludge treatment and disposal Pumping Aeration Other treatment processes Building services 10% 55% Centrifugal and press dewatering Sludge pumping, storing and residue burial Building services 35% Source: World Bank (2012, table 2.1, p. 12). © World Bank, Washington, DC. World Bank. 2012. A Primer on Energy Efficiency for Municipal Water and Wastewater Utilities. Energy Sector Management Assistance Program Technical Report 001/12. Washington DC, World Bank. http://documents.worldbank.org/curated/en/2012/02/16253058/primer-energy-efficiency-municipal-water-wastewater-utilities WWDR 2014 DATA AnD InDICAToRS AnnEx 193 INDICATOR INDICATOR bcm INDICATOR

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