Proposal for Sewage Treatment at FCT-UL Campus Dondo using Constructed Wetlands
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This study aims to address the challenge of poor sanitary sewage management at the Faculty of Sciences and Technology of Licungo University (FCT-UL) Campus in Dondo, by exploring the proposal of Constructed Wetlands as a sustainable solution for sanitary sewage treatment, starting from the observation of the limited capacity for sanitary sewage storage in the existing septic tanks, the research aims to propose a constructed wetlands system for sustainable sewage treatment with landscape adequacy at FCT - UL Campus in Dondo. The methodology adopted included a mixed approach, combining literature review, direct observation, and interviews. The chosen system to be implemented at FCT-UL is the Vertical Flow Constructed Wetlands – French System (VW-FS), planted with Typha Latifolia or Tifton 85 Grass operating with two units in parallel. Input data for the system, including the average water flow and the equivalent population of FCT-UL, were used for the definition of sizing criteria. The criteria were based on the hydraulic surface application rate. The final design resulted in a Surface Area of 16 m2 for the first stage, 8 m2 for each unit with a height of 70 cm. The filtering material of the system consists of 2 - 6 mm in the filtering layer, 5 - 20 mm of gravel No.1 in the transition layer, and 20 - 60 mm of gravel No.3 in the drainage layer. It is concluded that the WV-SF chosen in the project is an efficient and sustainable alternative for the treatment of sanitary sewage at FCT - UL Campus of Dondo, with a high average removal efficiency of TSS, BOD, COD, TKN, and .
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