Published date: Aug 10 2022

Journal Title: KnE Materials Science

Issue title: 1st International FibEnTech Congress (FibEnTech21) – New Opportunities for Fibrous Materials in the Ecological Transition

Pages: 204–211

DOI: 10.18502/kms.v7i1.11624

Flora Silvaflora@ipb.ptESTiG, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal

Ana Maria Antão-GeraldesCentro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal

António AlbuquerqueDepartment of Civil Engineering and Architecture, University of Beira Interior, Calçada Fonte do Lameiro, 6201-001, Covilhã, Portugal

Two potential measures for increasing water use efficiency in a municipal sports center were evaluated: (1) the reuse of water originating from showers in the flushing toilets in the indoor football court building; and (2) the reuse of water from swimming pool filter backwashing for irrigation. In the indoor football court building the total annual water consumption is around 3,500.5 m³ and from the showers is approximately 1,785.26 m³. Therefore, the greywater generated in showers can be reused in toilet flushing, which consumes about 840.12 m³ per year. The estimated annual water consumption for filter backwashing is 4,197.6 m³. The annual amount of water necessary for irrigating the lawn of the local football stadium is around 7,200 m³. Thus, the filter backwashed water, after being subjected to a sedimentation process, could be fully reused for this purpose.

Keywords: water efficiency, water reuse, swimming pools filter backwashing reuse, sports center, sustainability

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