Energy Efficiency in Municipal Water and Wastewater Works
Overview*
Water and wastewater infrastructure is one of the major consumers of energy within municipal operations and service delivery. Figures differ widely (particularly as many municipalities still do not routinely collect or monitor all sites of municipal electricity consumption), but the indications are that on average water and wastewater accounts for some 17% of energy consumption in a South African metro. In terms of electricity consumption alone (i.e. excluding liquid fuel use for vehicles), the proportion is far higher – often representing as much as 25% of the entire municipality’s electricity bill.
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