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Clean technology

Technology used today must respect environmental sustainability. This means designing systems so that as little waste and as few emissions as possible are produced. ‘Clean technology’ is a holistic approach to technology. It may mean switching to a more environmentally benign production method, or the introduction of a system which reduces waste output. A key objective in water-related contexts is to minimise both consumption and waste throughout the whole process of water supply and sewerage delivery, transport and treatment, without compromise to public health. For example, volumes of water used in flushing can be minimised: it is unsustainable to use environmentally and economically expensive clean, treated water as a medium for the transport of domestic and industrial waste. This waste, as well as sullage (or grey water) can be seen as a resource. By utilising sullage for irrigation, for example, the volumes of mixed waste entering a plant can be reduced, therefore minimising the energy and chemicals used in water treatment.
Further information: Clean Technology – An Introduction, Journal of Chemical Technology and Biotechnology, 1995.

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