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RISS 인기검색어
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단상혐기성소화조에서 가축분뇨와 음식물류폐기물의 병합비율에 따른 유기물 제거량에 대한 가스발생량 분석
최영익 ( Young-ik Choi ),신대열 ( Dae-yeol Shin ),권민지 ( Min-ji Geon ),이준희 ( Jun-hee Lee ),정병길 ( Byung-gil Jung ) 한국환경기술학회 2018 한국환경기술학회지 Vol.19 No.2
본 연구는 단상혐기성소화 공정을 이용하여 가축분뇨 및 음식물류 폐기물을 병합 처리하여 제거되는 유기물 제거량에 대한 가스발생량을 분석하는 것에 그 목적이 있다. 이를 위해 3개의 반응조를 제작하여 가축분뇨 및 음식물류 폐기물의 병합비율을 각각 R1(5:5), R2(7:3) 및 R3(3:7)로 설정하여 실험을 진행하였다. TS 및 VS를 측정하여 유기물의 제거율을 구하고 VFA의 생산량을 측정하여 유기물 및 VFA 상관관계를 분석하였다. 실험에 사용된 가축분뇨는 K시에 위치하고 있는 축사에서 채취한 어미 돼지의 분을 사용하였고, 음식물의 경우 B시 D대학교 구내식당에서 발생하는 음식물로서 수분이 충분히 제거된 것을 채취하였다. 운전조건은 R1의 경우 음식물과 축산폐수의 비를 5:5, R2는 음식물과 축산폐수의 비를 7:3, R3는 3:7의 비로 하였고, 혐기성소화액 비율은 1:0.2로 유효용량 1.3 L를 채운후 실시하였다. 실험 결과 병합비율이 5:5일 때 유기물이 39.8 % 감소할 때 VFA는 1,233 mg/kg 감소, 7:3일 때 유기물이 37.5 % 감소할 때 VFA는 1,253 mg/kg 감소 및 3:7일 때 유기물이 45.6 % 1,258 mg/kg 감소하는 것으로 나타났다. The present study aims to analyze the amount of gas generation for the amount of organic matter removal that is removed by the merging process of livestock manure and food type waste using the single-phase anaerobic digestion process. To achieve this end, three reactors were fabricated and experiments were conducted by setting the merge ratios of livestock manure and food type waste to R1 (5:5), R2 (7:3) and R3 (3:7), respectively. TS and VS were measured to find out the removal rate of organic matter, and VFA production amount was measured to analyze the correlation between the organic matter and VFA. The livestock manure used in the experiment was obtained from the mother pig collected from the pigsty located in K city, and the food was obtained from the food with sufficient moisture removed from the D university dining hall in B city. In terms of the operating condition, the ratio of food and livestock wastewater was set to 5:5 in the case of R1, 7:3 in the case of R2, and 3:7 in the case of R3. In terms of the anaerobic digestive fluid ratio was set to 1:0.2, and it was conducted after an effective capacity of 1.3 L was filled. As a result, VFA decreased by 1,233 mg/kg when the organic matter was reduced by 39.8 % at the merge ratio of 5:5, and VFA decreased by 1,253 mg/kg when the organic matter was reduced by 37.5 % at the merge ratio of 7:3, and VFA decreased by 1,258 mg/kg when the organic matter was reduced by 45.6 % at the merge ratio of 3:7.
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Bench-scale 선박용 고도수처리장치에서의 T-N 제거효율 연구
최영익 ( Young-ik Choi ),신대열 ( Dae-yeol Shin ),이승철 ( Seung-chul Lee ),정진희 ( Jin-hee Jung ),윤영내 ( Young-nae Yoon ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.1
In this study, the International Maritime Organization (IMO)’s guideline MEPC. 277 (64) was developed and evaluated for the removal efficiency of T-N in a SBR and MBR combined process. This combined process of resized equipment based on large capacity water treatment device for a protection of marine aquatic life. In this experiment, T-N concentration of influent and effluent was measured through with the artificial wastewater. The SBR reactor operation time was varied according to the C : N : P ratios so that different conditions for mixing and aeration period in mins (90 : 60, 80 : 40, 70 : 50) and two C: N: P ratios (10 : 5 : 3, 10 : 3 : 1) were used. During experiment in the reactor’s aeration and anoxic tank DO concentrations were 3 mg/L and 0.2 mg/L respectively. Furthermore, in the reactor MLSS concentration was 2000 mg/L and flowrate was 2 L/hr. Experiment results showed that C : N : P, 10 : 3 : 1 ratio with 90 mins mixing and 60 mins aeration maximized removal efficiency at 97.3% T-N as compared to other conditions. The application of the SBR and MBR combined process showed efficient results.
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선박 탑재용 오수처리시스템을 이용한 분뇨폐수의 COD 제거특성 평가
지현조 ( Hyeon-jo Ji ),정병길 ( Byung-gil Jung ),정진희 ( Jin-hee Jeong ),신대열 ( Dae-yeol Shin ),최영익 ( Young-ik Choi ) 한국환경기술학회 2021 한국환경기술학회지 Vol.22 No.1
Annex IV of International Convention for the Prevention of Pollution from Ships (MARPOL 73/78), adopted by the United Nations specialized agency ‘International Maritime Organization’, provides a set of guidelines for shipboard sewage and manure waste treatment. This study was performed to customize and optimize the previously developed, Marine Equipment Directive-certified, large-scale marine sewage treatment system at a Bench-scale to evaluate the chemical oxygen demand (COD) of shipboard sewage. This sewage treatment system uses a combined process of a continuous batch reactor (SBR) and a membrane bioreactor (MBR) to suit the ship environment. This study aimed to derive the optimum operating conditions for the treatment of organic matter at the Bench-scale. The Submerged Membrane-Sequencing Batch Reactor (SM-SBR) method applied during this experiment excluded the precipitation process from the existing SBR method and treated sewage through a membrane using MBR process. The existing SBR method is performed through react (mixing and aeration) → sedimentation → draw, however, the sedimentation time in combined SM-SBR process is reduced, this study was performed in a repetitive operations of mixing and aeration processes. The developed device consisted of a down flow anaerobic reactor, screen, bioreactor, and membrane reactor, and in the case of raw-water, considering the water runoff; a constant water level was maintained through a pump. In this study, the experimental conditions 1~4 for stirring : aeration states were set at 70 : 50 min, 80 : 40 min, 90 : 60 min, and 100 : 50 min, respectively. The COD removal efficiencies for conditions 1~4 during each operating condition were 96.69 %, 95.93 %, 96.86 %, and 96.29 %, respectively. Further more, findings of this study suggest that the highest organic matter removal efficiency was achieved at condition 3 (stirring : aeration = 90 : 60 min).
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