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Field-Scale Constructed Floating Wetland Applied for Revitalization of a Subtropical Urban Stream in Brazil

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  • Djesser Zechner Sergio

    (LAUTEC—Urban Stormwater and Compensatory Techniques Laboratory, Department of Sanitary and Environmental Engineering, UFSC—Federal University of Santa Catarina, Delfino Conti Street, s/n—Trindade, 88040-900 Florianópolis, SC, Brazil)

  • Alexandra Rodrigues Finotti

    (LAUTEC—Urban Stormwater and Compensatory Techniques Laboratory, Department of Sanitary and Environmental Engineering, UFSC—Federal University of Santa Catarina, Delfino Conti Street, s/n—Trindade, 88040-900 Florianópolis, SC, Brazil)

Abstract

Constructed floating wetland (CFW) is an ecotechnology used to improve water quality using emergent macrophytes on a floating mat structure. The goals of this research were to design and evaluate a low-cost field-scale CFW for revitalization of a polluted lentic section of an urban stream, located in the subtropical coastal region of South Brazil. To attain these goals (i), the design parameters were selected from field-scale applications in the literature, and (ii) the influence of the meteorologic and hydraulic data over the CFW performance to improve water quality were analyzed during five months. Macrophyte leaves grew 1 cm·day −1 . Biochemical oxygen demand (BOD) (72%), total phosphorus (TP) (52%), turbidity (53%), total solids (TS) (60%), dissolved oxygen (DO) (39%) and water temperature (WT) (0.4 °C) showed statistically significant reductions. The HRT was sufficient to reduce dissolved carbonaceous organic matter. HRT and solid particles-related parameters showed reductions both on high and low HRT. The resulting loading rates can be used for the design purposes of similar CFW field applications. The CFW promoted water quality improvement, attractiveness of fauna, temperature regulation, carbon sequestration, and is a potential ecotechnology towards the depollution of river basins in urban areas.

Suggested Citation

  • Djesser Zechner Sergio & Alexandra Rodrigues Finotti, 2023. "Field-Scale Constructed Floating Wetland Applied for Revitalization of a Subtropical Urban Stream in Brazil," Sustainability, MDPI, vol. 15(20), pages 1-18, October.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:20:p:14923-:d:1260816
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    References listed on IDEAS

    as
    1. Mohamed Elsayed Gabr & Madleen Salem & Hani Mahanna & Mohamed Mossad, 2022. "Floating Wetlands for Sustainable Drainage Wastewater Treatment," Sustainability, MDPI, vol. 14(10), pages 1-17, May.
    2. Munazzam Jawad Shahid & Ameena A. AL-surhanee & Fayza Kouadri & Shafaqat Ali & Neeha Nawaz & Muhammad Afzal & Muhammad Rizwan & Basharat Ali & Mona H. Soliman, 2020. "Role of Microorganisms in the Remediation of Wastewater in Floating Treatment Wetlands: A Review," Sustainability, MDPI, vol. 12(14), pages 1-29, July.
    3. Christopher Walker & Katharina Tondera & Terry Lucke, 2017. "Stormwater Treatment Evaluation of a Constructed Floating Wetland after Two Years Operation in an Urban Catchment," Sustainability, MDPI, vol. 9(10), pages 1-10, September.
    4. Hossain Md Anawar & Rezaul Chowdhury, 2020. "Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes," Sustainability, MDPI, vol. 12(17), pages 1-18, August.
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