SciELO - Scientific Electronic Library Online

 
vol.15 número2Remoção de sólidos e da demanda química de oxigênio na biodigestão anaerobia da cama de aviário com diferentes inóculosEficiência da eletrofloculação no tratamento de águas contaminadas por resíduos orgânicos índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Ambiente & Água

versão On-line ISSN 1980-993X

Resumo

MIRANDA, Suymara Toledo; MATOS, Antonio Teixeira de; MATOS, Mateus Pimentel  e  SARAIVA, Claudéty. Efficiency of horizontal subsurface flow-constructed wetlands considering different support materials and the cultivation positions of plant species. Rev. Ambient. Água [online]. 2020, vol.15, n.2, e2476.  Epub 09-Abr-2020. ISSN 1980-993X.  https://doi.org/10.4136/ambi-agua.2476.

The present work evaluated the influence of filling substrate material (crushed PET bottles or fine gravel) on the efficiency of pollutant removal in horizontal subsurface flow constructed wetlands (HSSF-CWs). They were cultivated with a consortium of elephant grass cv. Napier (Pennisetum purpureum Schum) and Tifton 85 (Cynodon spp.) to treat wastewater from a common milk cooling tank (WWMT). For this, six HSSF-CWs were used which had dimensions of 0.6 m tall x 1.0 m wide x 2.5 m long. In order to investigate possible efficiency loss in the removal of pollutants from the system, operation was divided into two periods: Period I (from April to December 2015) and Period II (April to December 2016). Thus, the removal efficiencies of BOD5, solids and total nitrogen (TN), total phosphorus (TP), potassium (K) and sodium (Na) from WWMT were statistically compared. Results indicated that the efficiency of the HSSF-CWs for removing pollutants increased or remained similar after one year and nine months of their operation; and PET bottles were a viable alternative substrate in HSSF-CWs based on the efficient removal of pollutants from WWMT during the one year and nine months of monitoring. Crushed PET bottles constitute a viable substrate for filling HSSF-CWs. Altering the cultivation positions of the plant species did not change pollutant removal efficiencies, but indicates the importance of species arrangement to maximize system performance.

Palavras-chave : alternative substrates; plant consortium; wastewater.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )