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SRT와 온도 변화를 통한 돈사폐수 내 고농도 암모니아의 아질산화 평가
임지열 ( Ji Yeol Im ),길경익 ( Kyung Gik Gil ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.5
The purpose of this study is to investigate the high strength ammonia oxidation of piggery wastewater. Laboratory scale reactors was operated using influent of piggery wastewater and effluent of anaerobic digester from piggery wastewater at 35℃ and 20℃. Results of various operating conditions were compared and analyzed. After analyzing the results, effluent of anaerobic digester from piggery wastewater required shorter Solid retention time (SRT) than influent of piggery wastewater. In terms of the temperature, stable ammonia removal and denitrification was achieved on the both of the condition. At the temperature of 35℃, nitrite conversion rate was better than 20℃. It can be concluded that treating the piggery wastewater using anaerobic digester on the condition of the temperature at 35℃ is more efficient on the nitritation of the piggery wastewater.
혐기 소화조 유출수의 아질산화 반응에 온도가 미치는 영향
임지열 ( Ji Yeol Im ),길경익 ( Kyung Ik Gil ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.3
Preparing for the Standards for Effluents which will be strengthen from 2012, many ways like remodellings and repairs of sewage treatment plant (STP) are considered. The treatment of the recycle water from the sludge treatment process contains high-strength organic compounds and nitrogen is considered as alternative. In the treatment of high-strength nitrogen, nitritation has more economic advantages than nitrification. In this study, lab-scale reactor was operated at the 35˚C, 20˚C and 10˚C conditions using effluent of anaerobic digester to investigate the nitrogen removal by nitritation. Long-term stable nitritation was achieved at the 35˚C, 20˚C but 10˚C. In the stable nitritation states, nitrite conversion was higher at the high temperature of 35˚C than the room temperature of 20˚C. Also shorter solid retention time (SRT) was needed to induce high nitrite conversion at the high temperature of 35˚C. It was showed that temperature and SRT are important factors to induce nitritation.
임지열 ( Ji Yeol Im ),정동기 ( Dong Gi Jung ),길경익 ( Kyung Ik Gil ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.6
This study conducted a result analysis on operation of 26 Rural Community Sewage Treatment Plant (RCSTP) newly constructed in Yeong-yang, Bong-hwa and An-dong areas which are located at the uper region of An-dong Dam and Im-ha Dam. Based on operation result, an analysis on characteristics of sewage in each areas and the treatment efficiency of the installed treatment process was conducted. The result of analysis on characteristics of sewage has shown the difference in concentration of the sewage according to area characteristics. Sewage in areas with frequent occurrence of agricultural water and livestock wastewater had high concentration. It is important to select the most suitable treatment process when selecting a treatment process for RCSTP according to properties of sewage in each area. As a result of operation, the disposal efficiency for organic matter and suspended solids was stable with less fluctuation, but the disposal efficiency for nitrogen and phosphorus showed high fluctuation. This signifies that it is necessary to pay attention to operation condition management of aitrogen and phosphorus when operating RCSTP.