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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