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KMID : 0382420010270010112
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Korean Journal of Environmental Health Society
2001 Volume.27 No. 1 p.112 ~ p.118
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Nitrogen and Phosphorus Removal of Municipal Wastewater with Temperature in CNR Process
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Kim Young-Kyu
Lee Young-Joon
Kim In-Bae
Yang Ik-Bae
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Abstract
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The aim of this study was to evaluate on the removal effect of total nitrogen and phosphorus in municipal wastewater with temperature change from 10℃ to 24℃ in CNR(Cilia Nutrient Removal) process. CNR process is the process combining A²/O process with cilium media of H2L company. The removal efficiencies for T-N were found to be 57.9% at 10℃ below, 53.7% at 10-20℃, 52.2% at 20-24℃ and 44.4% over 24℃, respectively. The removal efficiencies for T-P were 53.3% at 10℃ below, 59.1% at 10-20℃, 72.4% at 20-24℃ and 50.0% over 24℃ respectively. The specific nitrification rate (kg NH₃-N/kg MLSS.d) of Oxic basin was 0.088, and 0.053 at 10℃ below, 0.077 at 10-20℃, 0.097 at 20-24℃ and 0.088 over 24℃ respectively. The specific denitrification rate (kg NO₃/kg MLSS.d) in anaerobic and anoxic was 0.013, 0.008 respectively.
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