| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 689.48 KB | Adobe PDF |
Autores
Marques, Ana P. G. C.
Duque, Anouk F.
Bessa, Vânia S.
Mesquita, Raquel B. R.
Orientador(es)
Resumo(s)
The main aim of this study was to investigate the performance of an aerobic granular sludge sequencing batch reactor (AGS-SBR) receiving water streams supplied with different loads of Zn2+ (50 and 100 mg L-1) during an operation of 866 cycles (ca. 109 days). When the metal was not fed, chemical oxygen demand (COD), PO43- and NH4+ were efficiently removed, with efficiencies of 56, 23 and 72% respectively. DGGE profiles showed that Zn2+ supply negatively affected the bacterial diversity and community structure of the granules. Consequently, the shock loadings with Zn2+, particularly at the higher levels (100 mg L-1), affected the nutrient removal in the AGS-SBR, although the reactor still generally complied with admissible legal values concerning organic matter, nitrogen and Zn. Simultaneous removal of PO43- and TSS in such conditions needs further refining but the application of aerobic granular SBR in the treatment of Zn2+ contaminated wastewaters seems viable.
Descrição
Palavras-chave
Zinc Wastewater Sequencing batch reactor (SBR) Aerobic granular sludge (AGS)
Contexto Educativo
Citação
MARQUES, Ana P.G.C... [et al.] - Performance of an aerobic granular sequencing batch reactor fed with wastewaters contaminated with Zn2+. Journal of Environmental Management. ISSN 0301-4797. Vol. 128 (2013), p. 877-882
Editora
Elsevier