다양한 하수를 대상으로 아질산화 반응 적용성 평가

As the seriousness of water pollution resulted from nitrogen is being magnified, research has been conducted to reducenitrogen in sewage as well as wastewater. Particularly research on innovative nitrogen removal methods that are basedon the reaction of nitritation and are economically feasible and eco-friendly has been receiving attention. However,research on the applicability and efficiency of the methods based on the reaction of nitritation has not been completelydone yet. Accordingly, the current study has analyzed the characteristics of sewage flowing into municipal wastewatertreatment plants, primary clarifier supernatant, recycled water, and livestock wastewater and also operated a laboratory-level reactor. The result shows that recycled water and livestock wastewater contain higher-concentrationnitrogen than other kinds of sewage, so they increase nitrogen loading in the water treatment line. And the result ofoperating a reactor shows that because of ammonium nitrogen low concentration, sewage and primary clarifiersupernatant do not induce the reaction of nitritation. Also, there exist differences in the conditions of retention timeinducing the reaction of nitritation by the types of sewage, and this seems to be attributed to organic compound andammonium nitrogen concentration. Among the kinds of sewage inducing the reaction of nitritation, anaerobicdigester supernatant indicates the highest efficiency.