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: 136–145

DOI: 10.18502/kms.v7i1.11617

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

Paulo ScalizeSchool of Civil and Environmental Engineering, Federal University of Goiás, Av. Universitária, 1488, Setor Universitário, CEP 74605-220 Goiânia-GO, Brazil

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

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

The removal of residual pollutants from a synthetic effluent with a composition similar to that of urban effluent from secondary treatment was evaluated in vertical downflow columns. These were filled with soil, the fine fraction of the soil, and sand, and operated in discontinuous and continuous mode. The results showed high removal rates of organic matter, ammonium, nitrate and phosphate in the discontinuous and continuous experiments, especially for the fine fraction. Therefore, the soil is suitable for removing organic matter and nutrients (N-NH₄, N-NO₃, and P-PO₄), and can be used for polishing wastewater before its infiltration.

Keywords: wastewater reuse, organics removal, nutrient removal, residual soil, river sand

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