Abstract
An aerated vessel with Simcar type surface aerator was studied to estimate its significant performance characteristics i.e., oxygen transfer rate, mixing time and power consumption. The oxygen transfer and mixing characteristics were investigated with variations in the operating variables such as rotational speed, diameter, bottom clearance of impeller, liquid height and power consumption in single and dual impeller systems. The bottom clearance of the top impeller was found to affect largely the capacity of the impeller by varying the quantity of liquid loaded to it. It was also ensured that surface aeration caused a slight increase in mixing time compared to it under ungassed conditions. The dual impeller system was employed for the purpose of improving oxygen transfer and mixing at T/H < 1 varying the types and the bottom clearance of the lower impeller. However, the oxygen transfer rate was independent of the lower impeller mainly depending on the capacity of the top impeller though mixing time was sharply reduced by the lower impeller. The effect of the bottom clearance of the lower impeller was related to the liquid flow pattern inside the vessel, which was presented by computational fluid dynamics (CFD). The oxygen transfer rate and the mixing time were correlated with power consumption within reliable error range.
| Original language | English |
|---|---|
| Pages (from-to) | 1055-1068 |
| Number of pages | 14 |
| Journal | Environmental Technology (United Kingdom) |
| Volume | 22 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2001 Sep 1 |
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All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Water Science and Technology
- Waste Management and Disposal
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Studies on the overall oxygen transfer rate and mixing time in pilot-scale surface aeration vessel. / Kang, Joonwun; Lee, Chang-Ha; Haam, Seungjoo; Koo, K. K.; Kim, W. S.
In: Environmental Technology (United Kingdom), Vol. 22, No. 9, 01.09.2001, p. 1055-1068.Research output: Contribution to journal › Article
TY - JOUR
T1 - Studies on the overall oxygen transfer rate and mixing time in pilot-scale surface aeration vessel
AU - Kang, Joonwun
AU - Lee, Chang-Ha
AU - Haam, Seungjoo
AU - Koo, K. K.
AU - Kim, W. S.
PY - 2001/9/1
Y1 - 2001/9/1
N2 - An aerated vessel with Simcar type surface aerator was studied to estimate its significant performance characteristics i.e., oxygen transfer rate, mixing time and power consumption. The oxygen transfer and mixing characteristics were investigated with variations in the operating variables such as rotational speed, diameter, bottom clearance of impeller, liquid height and power consumption in single and dual impeller systems. The bottom clearance of the top impeller was found to affect largely the capacity of the impeller by varying the quantity of liquid loaded to it. It was also ensured that surface aeration caused a slight increase in mixing time compared to it under ungassed conditions. The dual impeller system was employed for the purpose of improving oxygen transfer and mixing at T/H < 1 varying the types and the bottom clearance of the lower impeller. However, the oxygen transfer rate was independent of the lower impeller mainly depending on the capacity of the top impeller though mixing time was sharply reduced by the lower impeller. The effect of the bottom clearance of the lower impeller was related to the liquid flow pattern inside the vessel, which was presented by computational fluid dynamics (CFD). The oxygen transfer rate and the mixing time were correlated with power consumption within reliable error range.
AB - An aerated vessel with Simcar type surface aerator was studied to estimate its significant performance characteristics i.e., oxygen transfer rate, mixing time and power consumption. The oxygen transfer and mixing characteristics were investigated with variations in the operating variables such as rotational speed, diameter, bottom clearance of impeller, liquid height and power consumption in single and dual impeller systems. The bottom clearance of the top impeller was found to affect largely the capacity of the impeller by varying the quantity of liquid loaded to it. It was also ensured that surface aeration caused a slight increase in mixing time compared to it under ungassed conditions. The dual impeller system was employed for the purpose of improving oxygen transfer and mixing at T/H < 1 varying the types and the bottom clearance of the lower impeller. However, the oxygen transfer rate was independent of the lower impeller mainly depending on the capacity of the top impeller though mixing time was sharply reduced by the lower impeller. The effect of the bottom clearance of the lower impeller was related to the liquid flow pattern inside the vessel, which was presented by computational fluid dynamics (CFD). The oxygen transfer rate and the mixing time were correlated with power consumption within reliable error range.
UR - http://www.scopus.com/inward/record.url?scp=0035168914&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035168914&partnerID=8YFLogxK
U2 - 10.1080/09593332208618215
DO - 10.1080/09593332208618215
M3 - Article
C2 - 11816768
AN - SCOPUS:0035168914
VL - 22
SP - 1055
EP - 1068
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
SN - 0959-3330
IS - 9
ER -