TY - JOUR
T1 - Achieving tetracycline removal enhancement with granules in marine matrices
T2 - Performance, adaptation, and mechanism studies
AU - Hao, Tianwei
AU - Shao, Jingyi
AU - Hu, Peng
AU - Varjani, Sunita
AU - Qian, Guangsheng
PY - 2023/3
Y1 - 2023/3
N2 - Using the aerobic granular sludge (AGS) to improve tetracycline (TET) removal in the treatment of mariculture wastewater was investigated in the present study. The AGS rapidly adapted to and was sustained in seawater matrices with a robust granule strength (k = 0.0014) and a more stable sludge yield than the activated sludge (AS) (0.14 vs 0.11 g-VSS/g-CODrem). The compact structure provided the AGS with an anoxic environment, which favored the growth of N (37.3 %) and P removal bacteria (30.4 %) and the expression of functional genes (nos, nor, and nar), resulting in more than 62 % TN and TP removals, respectively. Similar abundances of aromatic compound-degrading bacteria (∼34 %) in both reactors (AGS and AS) led to comparable TET biodegradation efficiencies (∼0.045 mg/g-VSS). The greater size and surface area of the AGS expanded the boundary layer diffusion region, leading to 16 % increases in the granule's TET adsorption capacity.© 2023 Elsevier Ltd. All rights reserved.
AB - Using the aerobic granular sludge (AGS) to improve tetracycline (TET) removal in the treatment of mariculture wastewater was investigated in the present study. The AGS rapidly adapted to and was sustained in seawater matrices with a robust granule strength (k = 0.0014) and a more stable sludge yield than the activated sludge (AS) (0.14 vs 0.11 g-VSS/g-CODrem). The compact structure provided the AGS with an anoxic environment, which favored the growth of N (37.3 %) and P removal bacteria (30.4 %) and the expression of functional genes (nos, nor, and nar), resulting in more than 62 % TN and TP removals, respectively. Similar abundances of aromatic compound-degrading bacteria (∼34 %) in both reactors (AGS and AS) led to comparable TET biodegradation efficiencies (∼0.045 mg/g-VSS). The greater size and surface area of the AGS expanded the boundary layer diffusion region, leading to 16 % increases in the granule's TET adsorption capacity.© 2023 Elsevier Ltd. All rights reserved.
KW - Adsorption and biodegradation
KW - Aerobic granular sludge
KW - Mariculture wastewater
KW - Microbial community
KW - Tetracycline
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85146066245&origin=recordpage
U2 - 10.1016/j.biortech.2023.128590
DO - 10.1016/j.biortech.2023.128590
M3 - RGC 21 - Publication in refereed journal
C2 - 36627084
SN - 0960-8524
VL - 371
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 128590
ER -
