Eficiência de espécies vegetais na purificação de esgoto sanitário

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Data

2007-03

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Editor

João Batista Duarte

Resumo

The objective of this study was to evaluate the efficiency of substrates and vegetal species to treat sanitary wastewater, in a subsurface downward flow root zone system, after previous decantation. The experiment was carried out at Samambaia Campus, Federal University of Goiás, Goiânia, Goiás State, Brazil. The vegetal species were narrow-leaf cattail (Typha angustifolia L.), white ginger (Hedychium coronarium J. König), Job's tears (Coix lacryma-jobi L.), and para grass (Urochloa mutica (Forssk.) T.Q. Nguyen). The system revealed to be efficient on wastewater pollutants removal, meeting the effluent standards established by current Brazilian regulation, except for ammoniumnitrogen. Narrow leaf cattail and white ginger showed to be more efficient on BOD reduction, substrate oxygenation, and ammonium-nitrogen and coliforms removal. Narrow leaf cattail was more efficient on phosphate removal. The efficiency on coliforms removal reached levels close to totality. Coconut fibre was the less efficient substrate for BOD and COD reduction and withdrawal of ammonium-nitrogen and coliforms.

Descrição

Palavras-chave

Tratamento de esgotos, Alagados construídos, Zona de raízes, Wastewater treatment, Constructed wetlands, Rootzone

Citação

ALMEIDA, Rogério de Araújo; OLIVEIRA, Luiz Fernando Coutinho de; KLIEMANN, Huberto José. Eficiência de espécies vegetais na purificação de esgoto sanitário. Pesquisa Agropecuária Tropical, Goiânia, v. 37, n. 1, p. 1-9, jan./mar. 2007. Disponível em: <https://www.revistas.ufg.br/pat/article/view/1839/1751>.