Evaluation of alternative water sources for commercial buildings: A case study in Brisbane,Australia |
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Affiliation: | 1. CSIRO Land and Water Australia, Highett, Vic 3190, Australia;2. CSIRO Land and Water Australia, Dutton Park, Qld 4102, Australia;3. School of Engineering, Griffith University, Gold Coast Campus, QLD 4222, Australia;1. International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, QLD 4001, Australia;2. Faculty of Environmental Engineering, National University of Civil Engineering, Hanoi, Vietnam;3. School of Population Health, The University of Queensland, Brisbane, QLD 4006, Australia;4. Faculty of Architecture, Design and Planning, The University of Sydney, Sydney, NSW 2006, Australia |
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Abstract: | Commercial buildings are central to cities and contribute significantly to the urban demand for natural resources, including freshwater. Green building benchmarking tools include more efficient water use as key indicator of sustainability. This paper explores options for substituting mains drinking water with an alternative, non-potable water source on a fit for purpose basis. The research findings are based on a monitoring study of a commercial building in Brisbane, Australia that is harvesting rainwater for meeting non-potable water demand. The results demonstrated that the system is only achieving moderate reliability in meeting demand due to operational problems. The case study analysis has highlighted the need to include validation and monitoring to ensure the system is operating as per design intent. The paper also investigates the potential of other local, non-potable water sources for high-rise commercial buildings, in particular air conditioning condensate and groundwater inflow to a basement wet well. The paper concludes by comparing the advantages and disadvantages of different local water sources which highlights the need to undertake a site specific investigation to identify a suitable alternative water source, which considers O&M complexity and the capacity of facilities management. |
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Keywords: | Water conservation Water supply substitution Rainwater harvesting Alternative water sources Green buildings Ecologically sustainable development |
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