지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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This study has investigated the characteristics of nitrogen mass balance and nitrogen removal ratio as influent distribution ratio changes 5:0, 4:1, 3:2, 2:3 in the SBR (Sequencing Batch Reactor) process. This study conducted the operation under the following conditions: SRT (Sludge Retention Time), 17.5 days; 1 cycle operating time, 6 hours ; COD load, 0.4kg CODCr/m3/day; and, nitrogen load, 0.4kg TN/m3/day.Nitrogen mass effluted at settle/draw phase was 64.0, 51.5, 38.4, and 42.4mg/cycle, consisting of NO3--N (about 90%), and the nitrogen removal ratio was improved 62.2, 70.2, 79.2, and 76.5% as influent mass increased during anoxic⑵ phase. During the above SBR process, nitrogen mass included in wasted sludge was as respectively 21.9, 21.5, 21.5, and 21.2 mgNwaste/cycle, which means influent distribution did not affect nitrogen removal. Nitrogen mass removed through denitrification was 73.2, 84.9, 95.8, and 91.6 mgN/cycle while influent mass to anoxic⑵ increased. Nitrogen mass balance calculated through the sum of nitrogen in clarified water, wasted nitrogen in sludge, and denitrificated nitrogen was 96.8, 96.3, 96.8, and 95.2%, showing acceptable value.
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