TY - JOUR

T1 - Experimental and numerical analysis of the hydrodynamic behaviors of aerobic granules

A1 - Liu,Li

A1 - Sheng,Guo‐Ping

A1 - Li,Wen‐Wei

A1 - Zeng,Raymond J.

A1 - Yu,Han‐Qing

AU - Liu,Li

AU - Sheng,Guo‐Ping

AU - Li,Wen‐Wei

AU - Zeng,Raymond J.

AU - Yu,Han‐Qing

PB - John/Wiley & Sons, Inc.

PY - 2011

Y1 - 2011

N2 - Aerobic granular sludge has been recognized to be promising for wastewater treatment. Their hydrodynamic characteristics have a significant impact on the mass transfer process in reactors. In this study, the hydrodynamic characteristics of aerobic granules were studied using an experimental approach, and their fluid dynamic behaviors were analyzed using a numerical approach. Experimental results show that the aerobic granules are fractal‐like aggregates with porosity. Their porosity and permeability were found to increase with increasing granule size. The numerical model simulated the flow field surrounding a granule, which distinguished the flow behaviors of the granules with different permeability at different outflow Reynolds numbers. The velocity vectors colored by velocity magnitude in the granule internal depended significantly on the permeability of the granule and the Reynolds number. The results provided a helpful tool to investigate the hydrodynamic behavior of aerobic granules with a consideration of their porous structure characteristics. © 2010 American Institute of Chemical Engineers AIChE J, 2011

AB - Aerobic granular sludge has been recognized to be promising for wastewater treatment. Their hydrodynamic characteristics have a significant impact on the mass transfer process in reactors. In this study, the hydrodynamic characteristics of aerobic granules were studied using an experimental approach, and their fluid dynamic behaviors were analyzed using a numerical approach. Experimental results show that the aerobic granules are fractal‐like aggregates with porosity. Their porosity and permeability were found to increase with increasing granule size. The numerical model simulated the flow field surrounding a granule, which distinguished the flow behaviors of the granules with different permeability at different outflow Reynolds numbers. The velocity vectors colored by velocity magnitude in the granule internal depended significantly on the permeability of the granule and the Reynolds number. The results provided a helpful tool to investigate the hydrodynamic behavior of aerobic granules with a consideration of their porous structure characteristics. © 2010 American Institute of Chemical Engineers AIChE J, 2011

U2 - 10.1002/aic.12476

DO - 10.1002/aic.12476

JO - A I Ch E Journal

JF - A I Ch E Journal

SN - 0001-1541

IS - 10

VL - 57

SP - 2909

EP - 2916

ER -