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폐슬러지를 이용한 탄화물의 오염물질 흡착능력에 관한 연구
오세은,인영범,한광희 大田産業大學校 2000 한밭대학교 논문집 Vol.17 No.1
A new approach to the activated carbon of excess activated sludge by incineration was studied to reduce the amount of sludge produced in the activated sludge treatment process. Activated carbon was effectively made From excess activated sludge by supply of nitrogen and oxygen at 700℃. These activated carbon were studied to examine its characteristics, and to assess adsorptive capacity of heavy metal, and nitrogen and phosphorus. There were occurred the following conclusions: Activated carbon made by nitrogen at 700℃, which indicated high alkalinity, used as soil neutral agents in case of spreading it into acidified soil. Granular activated carbon at 700℃ -N2 was shown adsorptive capacity over 90% during 4 hours about heavy metals, while powder activated carbon was over 80% at same time. Activated carbon at 700℃ -N2 was very high in the adsorptive capacity on nitrogen and phosphorus. Then municipal sewage sludge could be returned to sewage plant system for using adsorptive agents for removal of nitrogen and phosphorus.
오세은,인영범 한밭대학교 생산기반기술연구소 2002 생산기반기술연구소 논문집 Vol.2 No.1
Solubilization of excess activated sludge by self-digestion was studied to reduce the amount of sludge produced from activated-sludge treatment process. Excess sludge was efficiently made soluble by 60℃ in addition of NaOH of 0.01N. The VFA composition by self-digestion of sludge was the most excellent as 60 % in 60℃, which was shown good results in treating to the high rate anaerobic process.
음식물류 폐기물의 바이오가스 시설 내 황화수소 저감에 관한 연구
오세은,인영범 한국도시환경학회 2023 한국도시환경학회지 Vol.23 No.4
본 연구는 음식물류 폐기물을 이용한 혐기성 소화시설의 운영중 바이오가스 내 황화수소는 높은 부식성으로 설비의 수명을 크게 단축하고 있으며, 바이오가스를 이용하는 데 필요한 정제과정은 생산비용의 2배 이상에 달하는 것으로 보고되고 있다. 음식물류 폐기물을 이용한 혐기성 소화시설에서 측정한 염화철(II) 투입량에 따른 황화수소(H2S) 발생량은 중간저장소에서 최소 1,000 Kg의 FeCl2를 주입하였을 때, 혐기성소화시설에서 황화수소 최대 농도는 327 ppm으로 증가였고, 혐기성 안정화조에서는 346 ppm으로 증가됨을 나타냈었다. 중간저장조에서 최대 염화 철(II) 2,000 Kg의 FeCl2를 주입하였으며, 소화조의 황화수소 최소 농도는 37 ppm, 안정화조의 황화수소 최소 농도는 43 ppm으로 감소하였다. 기간동안 평균 염화 철(II)은 평균 1,300 Kg 씩 주입하여으며, 기질은 평균 276 m3 주입하여 운영한 결과 연구 기간동안 황화수소의 농도는 소화조에서 154 ppm, 안정화조에서 153 ppm으로 황화수소 설계기준 농도 300 ppm 이하로 저감되어 발생하고 있음을 알 수 있다. In this study, it is reported that the hydrogen sulfide in the biogas during the operation of the anaerobic digestion facility using food waste is highly corrosive and greatly shortens the life of the facility, and the purification process required to use biogas is more than twice the production cost. A maximum of 2,000 kg of iron (II) chloride FeCl2 was injected from the intermediate storage tank, and the minimum concentration of hydrogen sulfide in the digestion tank decreased to 37 ppm and the minimum concentration of hydrogen sulfide in the stabilization tank decreased to 43 ppm. The amount of hydrogen sulfide (H2S) generated according to the amount of iron (II) chloride input measured in the anaerobic digestion facility using food waste was increased to 327 ppm when at least 1,000 kg of FeCl2 was injected in the intermediate storage, and the maximum concentration of hydrogen sulfide in the anaerobic digestion facility increased to 327 ppm. In the anaerobic stabilization tank, it increased to 346 ppm.
음식물류 폐기물과 가축분뇨 병합처리 바이오가스화시설에 관한 연구
오세은,인영범 한국도시환경학회 2023 한국도시환경학회지 Vol.23 No.4
본 연구는 음식물류 폐기물과 가축분뇨의 물리·화학적 특성을 파악하고 이를 근거로 유기성 폐기물의 병합 바이오 가스화를 통한 신 · 재생에너지 생산과 국가정책에 부합하는 친환경적 환경 기초 시설을 구축하는 데 있다. 유기성 폐기물의 분해 특성 및 잠재적인 메탄발생량에 대한 획득을 위해 BMP (Biochemical methane potential)실험을 실시하였다. 메탄 잠재성 축분뇨(돈분뇨) 경우 실험 시작 약 40일 후의 메탄발생량은 최대값에 도달하였고, Gompertz식에 적용한 결과“P”값은 374.8 mL로 계산되었으며, 주입된 COD당 메탄수율은 175.9 mL CH4/g COD로 약 51.3%의 전환율을 보였으며, 두번째, 기질인 음식물류 폐기물의 경우 실험 시작 후 약 37일에 478.7 mL로 최대값에 도달하였고, “P”값은 최대 538.9 mL, 메탄수율 293.3 mL CH4/g COD, 82.3%의 메탄 전환율로 가축분뇨에 비해 상당히 높게 나타났다. This study is aimed at understanding the physical and chemical properties of food waste and livestock manure, and based on this, it seeks to establish an environmentally friendly infrastructure that aligns with national policies through the combined biogasification of organic waste for the production of new and renewable energy. To acquire the decomposition characteristics and potential methane production of organic waste, a Biochemical Methane Potential (BMP) test was conducted. In the case of methane potential livestock manure (pig manure), the methane production reached its maximum value approximately 40 days after the start of the experiment. The “P” value calculated by applying the Gompertz equation was 374.8 mL, and the methane yield per injected Chemical Oxygen Demand (COD) was 175.9 mL CH4/g COD, showing a conversion rate of approximately 51.3%. Secondly, in the case of the substrate, food waste, it reached its maximum value of 478.7 mL approximately 37 days after the start of the experiment. The “P” value was a maximum of 538.9 mL, the methane yield was 293.3 mL CH4/g COD, and the methane conversion rate was 82.3%, which was significantly higher than that of livestock manure.