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KMID : 1024520080170080833
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Journal of the Environmental Sciences
2008 Volume.17 No. 8 p.833 ~ p.840
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A Study of Carbonaceous BOD Decay Rates for the Nakdong River Water System
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Yoon Young-Sam
Yu Jae-Jeong
Shin Chan-Ki
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Abstract
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Deoxygenation process in which CBOD(carbonaceous BOD) is biochemically oxidized to reduced inorganic compounds is of great significance in the oxygen demand of stream waters. The CBOD decay rate has traditionally been determined in a laboratory by CBOD bottle incubation method. But in this study, CBOD decay rates were obtained by laboratory incubation method and natural waters experiment. Average CBOD decay rate for the Nakdong river(upper zone) in natural waters were 0.553 during April 2005 to January 2007. The values in the middle and down parts of the Nakdong river in natural waters were 0.384 and 0.252 at the same period of time, respectively. Average CBOD decay rates using by incubation method in the upper/middle/down parts of the main stream in the Nakdong river basin was 0.270 , and 0.289 , and 0.283 during April 2005 to January 2007, respectively.
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KEYWORD
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Deoxygenation process, CBOD decay rate, Incubation method
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