Journal of Environmental Health Sciences (한국환경보건학회지)
- Volume 26 Issue 3
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- Pages.98-102
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- 2000
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- 1738-4087(pISSN)
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- 2233-8616(eISSN)
The Nitrogen Removal of Municipal Wastewater with HRT using CNR Process
CNR공법의 체류시간에 따른 도시하수의 질소제거
Abstract
The aim of this study was to evaluate on the removal effect of total nitrogen in municipal wastewater by decreasing hydraulic retention time(HRT) from 6 hour to 4 hour on CNR process. CNR-A(Cilia Nutrient Removal) is the process combining A2/O process with cilium media of H2L corporation. The removal efficiencies for T-N were 63.1% in A-1 reactor, and 73.5% in A-2 reactor and 77.0% in A-3 reactor. The specific nitrification(g-NH3-N/g-MLVSS.d) of Oxic in CNR-A process was 0.07-0.32. The specific denitrification in Anoxic and the specific nitrification inOxic was higher in HRT 4 hour because of optimum F/M ratio.