Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/11316
Título: | Mature landfill leachate treatment by denitrification and ozonation |
Autor(es): | Cortez, Susana Teixeira, P. Oliveira, Rosário Mota, M. |
Palavras-chave: | Anoxic rotating biological contactor Mature landfill leachate Nitrate removal Ozonation Phosphorus |
Data: | 2011 |
Editora: | Elsevier |
Revista: | Process Biochemistry |
Citação: | "Process Biochemistry". ISSN 1359-5113. 46:1 (2011) 148-153. |
Resumo(s): | The removal of nitrate from a mature landfill leachate with high nitrate load in a lab-scale anoxic rotating biological contactor (RBC) was studied. Under a phosphorus-phosphate concentration of 10mg P-PO4 3− L−1 and nitrogen-nitrate concentrations above 530mgN-NO3 − L−1 the reactor achieved nitrogennitrate removal efficiencies close to 100%, without nitrite or nitrous oxide accumulation. Although the reactor presented a very good denitrification performance, the effluent carbon concentration was still above the legal discharge value. In order to increase the biodegradability of the leachate recalcitrant carbon load, a pre-ozonation was further investigated. The pre-ozonation led to a total organic carbon (TOC) removal of 28%. The sequence of treatments, leachate ozonation followed by RBC denitrification did not affect the denitrification efficiency. In fact, it was possible to attain a denitrification rate of 123mg N-NO3 − L−1 h−1. The moderate decrease in the carbon load of the final effluent indicated that some recalcitrant compounds were still present after ozonation. The anoxic RBC showed to be a promising technology for removing nitrate from landfill leachate. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/11316 |
DOI: | 10.1016/j.procbio.2010.07.033 |
ISSN: | 1359-5113 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Cortez_Process Biochemistry.pdf | 461,85 kB | Adobe PDF | Ver/Abrir |