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Publicação
Avaliação da eficiência do tratamento microbiológico em ETAR's mediante o uso de tecnologias de depuração não convencionais
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| 3.85 MB | Adobe PDF | |||
| 80.67 KB | Adobe PDF | |||
| 3.85 MB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
The principal purpose of this study was to evaluate the efficiency of the urban
wastewater treatment using non conventional technologies (NCT). The studied NCT
were stabilization ponds, peat filters (PT) and constructed wetlands (CW). In CW, the
activity of plants from Phragmites gender is used for microorganisms and other
constituents removal that are present in urban wastewater. This work also pretended to
optimize methodologies for detection of helminth eggs and total nematodes in raw and
treated wastewater samples.
To evaluate the presence/absence of total nematodes Cobb’s decantation and
filtration method was used, according to Flegg. Concerning the intestinal parasites
parameter the Modified Bailenger method was used. Membrane filtration method was
used for the enumeration of faecal contaminant indicator Escherichia coli. For
Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Total
Suspended Solids (TSS) evaluation, methods described in “Standard Methods” (1998)
were used.
The removal capacity of helminth eggs, total nematodes and Escherichia coli
evaluation, showed that the studied non conventional technologies of urban wastewater
treatment were efficient in the removal of these elements, and a reduction of the organic
load present in the collected samples was also observed.
The studied non conventional systems for wastewater treatment presented values
according to the recommended values by the European Directive 91/217/ECC, and so,
these systems could be considered efficient depuration systems.
Descrição
Tese mest. , Engenharia Biológica, 2009, Universidade do Algarve
Palavras-chave
Teses Tratamento de águas Águas residuais Tecnologias de tratamento não convencionais Lagunagem Filtros de turfa Nemátodos totais 628.16