Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.6/1323
Título: Influence of bed media characteristics on ammonia and nitrate removal in shallow horizontal subsurface flow constructed wetlands
Autor: Albuquerque, António
Oliveira, J.
Semitela, S.
Amaral, L.
Palavras-chave: Bed media
Ammonia removal
Nitrate removal
Constructed wetlands
Shallow bed
Data: Dez-2009
Editora: Elsevier
Citação: 9.6.25) ALBUQUERQUE A., OLIVEIRA J., SEMITELA S. e AMARAL L. (2009). Influence of bed media characteristics on ammonia and nitrate removal in shallow horizontal subsurface flow constructed wetlands. Bioresource Technology, 100(24), 6269-6277.
Resumo: Two bed media were tested (gravel and Filtralite) in shallow horizontal subsurface flow (HSSF) constructed wetlands in order to evaluate the removal of ammonia and nitrate for different types of wastewater (acetate-based and domestic wastewater) and different COD/N ratios. The use of Filtralite allowed both higher mass removal rates (1.1 g NH4–N m−2 d−1 and 3 g NO3–N m−2 d−1) and removal efficiencies (>62% for ammonia, 90–100% for nitrate), in less than 2 weeks, when compared to the ones observed with gravel. The COD/N ratio seems to have no significant influence on nitrate removal and the removal of both ammonia and nitrate seems to have involved not only the conventional pathways of nitrification–denitrification. The nitrogen loading rate of both ammonia (0.8–2.4 g NH4–N m−2 d−1) and nitrate (0.6–3.2 g NO3–N m−2 d−1) seem to have influenced the respective removal rates.
Peer review: yes
URI: http://hdl.handle.net/10400.6/1323
ISSN: 1873-2976
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