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https://hdl.handle.net/1822/16859
Título: | Denitrifying potential of an activated sludge derived consortium |
Autor(es): | Teixeira, P. Fernandes, Zélia Azeredo, Joana Oliveira, Rosário |
Palavras-chave: | Anoxic rotating biological contactor Biofilm Carbon source Carbon/nitrogen ratio Denitrification |
Data: | 2010 |
Editora: | Gheorghe Asachi Technical University of IASI 1 |
Revista: | Environmental Engineering and Management Journal |
Resumo(s): | The aim of this work was the evaluation of the denitrification potential of a consortium of activated sludge adapted to anoxic conditions. As the carbon source is the main parameter influencing the denitrification process, in the first stage three carbon sources (acetate, citrate and glucose) were assayed in batch activity tests. The highest denitrification efficiency was attained with acetate, being nitrate and nitrite completely reduced. The adapted sludge was then used as a potential denitrifying consortium on an anoxic rotating biological contactor (RBC) with acetate as carbon source. Two C/N ratios were assayed (2 and 3) as well as two nitrate loads (220 and 300 mg/L). At the highest nitrate concentration, the best denitrification efficiency (nitrate removal higher than 99% without nitrite or acetate accumulation) was attained at C/N=3. From the results it can be concluded that the activated sludge possesses high denitrifying capacity and can easily be adapted to anoxic conditions. Moreover, the RBC revealed to be a good alternative solution to the conventional processes. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/16859 |
ISSN: | 1582-9596 1843-3707 |
Versão da editora: | http://omicron.ch.tuiasi.ro/EEMJ/index.htm |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |