TY - JOUR
T1 - Performance of an aerobic granular sequencing batch reactor fed with wastewaters contaminated with Zn2+
AU - Marques, Ana P. G. C.
AU - Duque, Anouk F.
AU - Bessa, Vânia S.
AU - Mesquita, Raquel B. R.
AU - Rangel, António O. S. S.
AU - Castro, Paula M. L.
PY - 2013/10/15
Y1 - 2013/10/15
N2 - 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 100mgL-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 (100mgL-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.
AB - 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 100mgL-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 (100mgL-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.
KW - Aerobic granular sludge (AGS)
KW - Sequencing batch reactor (SBR)
KW - Wastewater
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=84880715647&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2013.06.052
DO - 10.1016/j.jenvman.2013.06.052
M3 - Article
C2 - 23880431
AN - SCOPUS:84880715647
SN - 0301-4797
VL - 128
SP - 877
EP - 882
JO - Journal of Environmental Management
JF - Journal of Environmental Management
ER -
