RECTANGULAR TANK SURFACE AERATORS: SCALE UP CRITERIA AND ENERGY CONSERVATION

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RAO A.R.; KUMAR B.

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Journal Paper

Paper Information

Journal: INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST) Year:2006 | Volume:3 | Issue:4 Page(s): 425-433

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Title

RECTANGULAR TANK SURFACE AERATORS: SCALE UP CRITERIA AND ENERGY CONSERVATION

Author(s)

RAO A.R. | KUMAR B. | Issue Writer Certificate

Keywords

FROUDE NUMBER

OXYGEN TRANSFER COEFFICIENT

POWER NUMBER

POWER PER UNIT VOLUME

REYNOLDS NUMBER

SURFACE AERATORS

WATER AND WASTEWATER TREATMENT

Abstract

Surface aeration experiments were conducted in two types of rectangular tanks of aspect ratios i.e., length to width ratio (L/W) of 1.5 and 2 and developed simulation equations to correlate the OXYGEN TRANSFER COEFFICIENT, k and POWER NUMBER, P0 with a parameter governing theoretical POWER PER UNIT VOLUME X. The parameter X is defined as equal to F4/3R1/3, where F and R are impellers’ Froude and REYNOLDS NUMBERs respectively). Results have shown that the P0 can not be simulated singularly with either REYNOLDS NUMBER, R or FROUDE NUMBER, F, which results in scale effects; there appears to be a need to incorporate the effects of both F and R. It was found that P0 is uniquely related to X for rectangular aeration tanks of both aspect ratios, however, such relationships are different depending upon the aspect ratios. It has been demonstrated that energy can be saved substantially if the aeration tanks are run at relatively higher input powers. It is also demonstrated that smaller sized tanks are more energy conservative and economical when compared to big sized tanks, while aerating the same volume of water, and at the same time by maintaining a constant input power in all the tanks irrespective of their size.

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APA: Copy

RAO, A.R., & KUMAR, B.. (2006). RECTANGULAR TANK SURFACE AERATORS: SCALE UP CRITERIA AND ENERGY CONSERVATION. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), 3(4), 425-433. SID. https://sid.ir/paper/284993/en

Vancouver: Copy

RAO A.R., KUMAR B.. RECTANGULAR TANK SURFACE AERATORS: SCALE UP CRITERIA AND ENERGY CONSERVATION. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST)[Internet]. 2006;3(4):425-433. Available from: https://sid.ir/paper/284993/en

IEEE: Copy

A.R. RAO, and B. KUMAR, “RECTANGULAR TANK SURFACE AERATORS: SCALE UP CRITERIA AND ENERGY CONSERVATION,” INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), vol. 3, no. 4, pp. 425–433, 2006, [Online]. Available: https://sid.ir/paper/284993/en

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