Aspect ratio effect on oxygen transfer process in rectangular tank surface aerator

Rao, A. Venkateswara; Kumar, Bimlesh

doi:10.1002/apj.60

Asia-Pacific J Chem Eng

2007

DOI: 10.1002/apj.60

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Aspect ratio effect on oxygen transfer process in rectangular tank surface aerator

A. Venkateswara Rao

Bimlesh Kumar

Abstract: Surface aeration experiments were conducted in three types of geometrically similar rectangular tanks of aspect ratios, i.e. length to width ratio (L/W ) of 1, 1.5 and 2 in order to study the effect of aspect ratio on the oxygen transfer process. It is observed that for geometrically similar tanks, oxygen transfer coefficient (K L a

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2009

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Carrier effects on oxygen mass transfer behavior in a moving‐bed biofilm reactor

Jing

Feng

2009

Asia-Pacific J Chem Eng

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This study investigates the carrier effects on the oxygen mass transfer behavior of a gas-liquid biofilm surface, and aims to provide evidence for parameter optimization in the practical operation of a moving-bed biofilm reactor (MBBR) during the coking-plant wastewater process. By using the dynamic oxygen dissolution method, the volumetric oxygen mass transfer coefficient K La was measured by varying the suspended carrier stuffing rate and the intensity of aeration. Within the range of fluidizable flow rate, the efficiency of oxygen mass transfer increased with suspended carrier stuffing rate, and K La reached its peak value when the stuffing rate was 40%. K La has an increasing trend with an increase of the aeration intensity, but high aeration intensity was not favorable for reactor operation. Better oxygen mass transfer effect and higher oxygen transfer efficiency could be achieved when the aeration intensity was 0.3 m 3 h −1 and the suspended carrier stuffing rate was 30-50%. The possible mechanisms that can account for carrier effects on oxygen mass transfer are the changes in the gas-liquid interfacial area. The ammonia nitrogen removal performance of the coking-plant wastewater in MBBR was satisfied by using the above-suggested conditions.  2009

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Carrier effects on oxygen mass transfer behavior in a moving‐bed biofilm reactor

Jing

Feng

2009

Asia-Pacific J Chem Eng

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Aspect ratio effect on oxygen transfer process in rectangular tank surface aerator

Cited by 1 publication

References 22 publications

Carrier effects on oxygen mass transfer behavior in a moving‐bed biofilm reactor

Carrier effects on oxygen mass transfer behavior in a moving‐bed biofilm reactor

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