Financial viability of in-building grey water recycling

David Butler, Andrew M. Dixon

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    There is a growing interest worldwide in utilising water more efficiently. This paper presents a study undertaken to explore the financial aspects of an in-building water re-use system. The financial issues are defined in terms of: capital costs, running costs, maintenance costs and water saving benefits. A model was developed to allow the user to specify factors pertinent to a net present value calculation and to map the viability space (i.e. the set of conditions required for the re-use system to be financially viable). The most important variable was found to be the annual maintenance cost. A scoring system was developed to indicate the degree of financial viability. Use of the model is explained by the application of three example cases.
    Original languageEnglish
    Title of host publicationProceedings of the International Conference
    Subtitle of host publicationWastewater Management & Technologies for Highly Urbanized Coastal Cities 2002
    Place of PublicationHong Kong
    PublisherHong Kong Polytechnic University
    ISBN (Print)9623673531 , 9789623673532
    Publication statusPublished - 10 Jun 2002


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