Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/6700
Título: Avaliação do desempenho das zonas húmidas construídas: estudo de caso Barroca d'Alva
Autor: Botequilha, José Ricardo Martins
Orientador: Oliveira, Maria Margarida da Costa Ferreira Correia de
Duarte, Elizabeth Fernandes de Almeida
Caldas, Cristina Maria Gameiro
Palavras-chave: constructed wetlands
seasonal variations
domestic wastewater treatment
concentration peaks
Data de Defesa: 2013
Editora: ISA
Citação: Botequilha, J.R.M. - Avaliação do desempenho das zonas húmidas construídas: estudo de caso Barroca d'Alva. Lisboa: ISA, 2013, 68 p.
Resumo: Constructed Wetlands (CW) are suitable for rural areas with high environmental and cost-benefits compared with conventional treatment systems for wastewater due to its high construction cost and need for continuously technical supervision. This alternative technology consists on man-made system that reproduces the processes that occur during the water purification in natural wetlands. The wastewater flows through the porous medium under the surface of the beds which are planted with macrophytes ensuring the removal of pollutants. The present work aimed to study the effect of seasonal variation on the removal of pollutants during spring and summer in CW of Barroca D’Alva. This work also studies the buffering capacity of the wetland after a series of increment of organic loading rate at Barroca D’Alva. In spring the removal efficiencies obtained were 40% for total suspended solids (TSS), 97% for biochemical oxygen demand in 5 days (BOD5), 60% for soluble phosphorus, more than 90% for nitrogen and 99% for pathogen. The summer season showed better results (66.6% for SST, 98% for BOD5, 80% for soluble phosphorus, more than 90% for nitrogen and 99% for pathogen). Despite the over sizing of CW it showed high efficiency in removing pollutants. The concentrations of pollutants in the discharge site were below the Portuguese standards.
Descrição: Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/6700
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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Dissertação de mestrado JBotequilha - Vdefinitiva.pdf3,21 MBAdobe PDFVer/Abrir


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