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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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To study the characteristics of organic and nutrient removal by Bacillus species at high COD concentration of influent, three lab-scale batch reactors(R1, R2, R3), each of which has different substrate composition, were operated. More than 95% of NH4+-N and CODCr concentrations were removed under an aerobic condition, and their removal efficiencies were found to be 22.6 and 90.5%(R1), 23.9 and 65.8%(R2), 30.2 and 86.4%(R3), respectively. The removal efficiency of NH4+-N was high when an enough amount of NO3--N was supplied, and that of CODCr was low when a high concentration of initial NO2--N was added. The amount of carbon utilized in denitrification was a little. In all reactors, NO3--N was removed under an anoxic condition, but in the R3 reactor, 10% of NO3--N could be removed even under an aerobic condition. The removal efficiencies of TN and TP were 41.8 and 49.5%(R1), 40.1 and 35.8%(R2), 47.0 and 57.6%(R3), respectively. Alkalinities destructed under an aerobic condition for each reactor were 4.96, 5.41 and 3.93 mg/L (as CaCO3) per each gram of NH4+-N oxidized, respectively, while 3.06, 3.17 and 2.60 mg/L (as CaCO3) of alkalinities were produced for each gram of NO3--N reduced to N2. The SOUR were found to be 38.5, 52.7 and 42.0 mg O2/g MLSS/hr, which indicated that Bacillus sp. had a higher cell activity than activated sludge. The OLR and sludge production were estimated to be 0.69 and 0.28(R1), 0.77 and 0.20(R2), 0.61 kg COD/m3/day and 0.25 kg MLSS/kg COD(R3), respectively. From the N-balance, the highest percentage(40.9%) of nitrogen lost to N2 was obtained in the R3 reactor. From all the results, the possibility of aerobic denitrification Bacillus sp. has been shown and the B3 process seemed to have two advantages: a little amount of carbon was required in denitrification and not much amount of alkalinity was destructed under an aerobic condition.
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UCI(KEPA) : I410-ECN-0101-2009-470-014220141