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KMID : 1156220080340060446
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Journal of Environmental Health Sciences
2008 Volume.34 No. 6 p.446 ~ p.451
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Sewage Treatment Using a Modified DNR Process
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Choi Jin-Taek
Nam Se-Yong
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Abstract
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In this study, the removal characteristics of organic components and nutrients of sewage taken from the Suwon area were investigated in a lab-scale modified DNR (Daewoo Nutrient Removal) process. The modified DNR process consisted of a sludge denitrification tank, an anaerohic tank, an anoxic tank, an aerohic tank, a secondary anoxic tank and a secondary aerobic tank. The proposed process with the average C/N ratio of 3.5 was perfomled for the sewage treatment. The results were compared with other existing DNR processes. The organic fractions in sewage were analyzed by measuring the oxygen uptake rale. The resulting removal efficiencies of SS, BOD, COD, TN and TP were 93.1 %, 95.5%, 86.1 %. 67.8% and 80.6%, respectively.
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KEYWORD
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a modified DNR, sewage, organic fractions, hiological nutrient removal
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