TY - GEN
T1 - Gas transfer inside a deep airlift reactor
AU - Giovannettone, J. P.
AU - Gulliver, J. S.
PY - 2008
Y1 - 2008
N2 - Airlift reactors with a bubbly flow are commonly used to add oxygen to the hypolimnion of lakes. However, there is no reliable information on the gas transfer that will occur in a field-scale airlift reactor. Gas transfer experiments are conducted inside a deep bubble column/airlift reactor containing air and water with a maximum aerated water height of 23.4 meters and diameter of 1.06 meters. The effects of geometry and operating conditions on gas transfer are determined. A two-phase convection-dispersion model is fit to the DO measurements using the liquid film coefficient (KL) as a fitting parameter. Sparger differences had a substantial effect upon KL, and the gas transfer coefficient for the airlift reactor was four times that of the bubble column. Results are characterized using Sherwood, Reynolds and Bond numbers. A low Reynolds number exponent was found, indicating that KL in a deep column tends towards a constant and is not highly dependent upon air discharge.
AB - Airlift reactors with a bubbly flow are commonly used to add oxygen to the hypolimnion of lakes. However, there is no reliable information on the gas transfer that will occur in a field-scale airlift reactor. Gas transfer experiments are conducted inside a deep bubble column/airlift reactor containing air and water with a maximum aerated water height of 23.4 meters and diameter of 1.06 meters. The effects of geometry and operating conditions on gas transfer are determined. A two-phase convection-dispersion model is fit to the DO measurements using the liquid film coefficient (KL) as a fitting parameter. Sparger differences had a substantial effect upon KL, and the gas transfer coefficient for the airlift reactor was four times that of the bubble column. Results are characterized using Sherwood, Reynolds and Bond numbers. A low Reynolds number exponent was found, indicating that KL in a deep column tends towards a constant and is not highly dependent upon air discharge.
KW - Lakes
KW - Oxygen
KW - Reactors
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U2 - 10.1061/40976(316)196
DO - 10.1061/40976(316)196
M3 - Conference contribution
AN - SCOPUS:79251469771
SN - 9780784409763
T3 - World Environmental and Water Resources Congress 2008: Ahupua'a - Proceedings of the World Environmental and Water Resources Congress 2008
BT - World Environmental and Water Resources Congress 2008
T2 - World Environmental and Water Resources Congress 2008: Ahupua'a
Y2 - 12 May 2008 through 16 May 2008
ER -