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SBR 및 MBR 복합 공정을 이용한 선박용 고도수처리장치의 침전시간에 따른 T-N 및 T-P 제거효율 변화 연구
정진희 ( Jin Hee Jung ),윤영내 ( Young Nae Youn ),최영익 ( Young Ik Choi ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.4
This study aimed to assess the removal efficiency for TN and TP depending on whether or not settling is removed in an advanced water treatment system for ships, where sequencing batch reactor (SBR) and membrane bioreactor (MBR) processing is applied, to satisfy the water quality standards of the Marine Environment Protection Committee (MEPC) of the International Maritime Organization (IMO). For these purposes, the concentrations of TN and TP in the inflow and outflow water were measured to calculate the TN and TP removal efficiencies. Water discharged from a bathroom, which was created for the experiment, was used as raw water. Under Condition 1, settling existed, and aeration was conducted for 150 min, settling for 45 min, agitation for 15 min, and settling for 15 min. Under Condition 2, settling did not occur, and aeration was conducted for 180 min and agitation for 60 min. The mixed liquor suspended solids (MLSS) concentration in the reactor was 3,500 mg/L, whereas the aeration rate was 121 L/min and the water production rate was 1.2 L/min. According to the results, the average TN removal efficiency was 42.2% and the average TP removal efficiency was 49.5%, under Condition 1, whereas the average TN removal efficiency was 64.9% and the average TP removal efficiency was 55.6%, under Condition 2. Although the final nutrient levels did not satisfy the water quality standards of MEPC 227(64), the TN and TP removal efficiencies were higher under Condition 2 where no settling occurred.
MARPOL 73/78의 기준에 따른 선박오수 처리 장치(SBR 및 MBR 복합공정)의 사용 가능성 평가 : 영양염류 위주 (T-N 및 T-P)
정진희 ( Jin-hee Jung ),윤영내 ( Young-nae Youn ),최영익 ( Young-ik Choi ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.9
This study aimed to evaluate changes in the TN and TP removal efficiencies, depending on whether or not a settling process is applied, in a sequencing batch reactor (SBR) process with a membrane bioreactor (MBR). Nutrient removal was considered in terms of developing an advanced water treatment system for ships in accordance with water quality standards set forth by 227(64). For these purposes, the TN and TP concentrations in the inflow and outflow water were measured to calculate the TN and TP removal efficiencies, depending on whether or not a settling process was used. Water discharged from a bathroom, which was constructed for the experiment, was used as the raw water. The experiment that included a settling process was conducted twice, and the operating conditions were: aeration for 90 min, settling for 30 min, agitation for 15 min, and settling for 15 min for one experiment; and aeration for 150 min, settling for 45 min, agitation for 15 min, and settling for 15 min in the other. Operating conditions for the experiment that did not include a settling process were: aeration for 180 min and agitation for 60 min. The concentration of the mixed liquor suspended solids (MLSS) in the reactor was 3,500 mg/L, while the aeration rate was 121 L/min and the water production rate was 1.5 L/min. For the two experiments where a settling process was applied, the average TN removal efficiencies were 44.39% and 41.05%, and the average TP removal efficiencies were 47.85% and 46.04%. For the experiment in which a settling process was not applied, the average TN removal efficiency was 65.51%, and the average TP removal efficiency was 52.51%. Although the final nutrient levels did not satisfy the water quality standards of MEPC 227(64), the TN and TP removal efficiencies were higher when a settling process was not applied.
불용성 전극을 이용한 절삭유의 전기화학적 처리에 관한 연구
양승빈 ( Seung-bin Yang ),장성호 ( Seong-ho Jang ),이재용 ( Jae-yong Lee ),박진식 ( Jin-sik Park ),류재용 ( Jae-yong Ryu ),윤영내 ( Young-nae Youn ) 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회 추계학술발표논문집 Vol.2016 No.-
1900년대 초부터 금속 가공 장비의 수명 연장 및 가공물의 품질 향상을 위해 금속 가공 공정에 절삭유가 이용되어 왔다. 금속 가공 특성에 따라 절삭효율 향상을 위해 각종 첨가제를 포함시켜 여러 종류의 절삭유가 제조되고 있으며, 일반적으로 수용성과 비수용성으로 분류된다. 비수용성 절삭유의 경우, 폐유처리과정에서 유독성 물질 발생, 발연·발화 등의 문제로 수용성 절삭유의 사용이 점차 증가해 왔으며, 국내에서 이용되는 절삭유의 60% 이상이 수용성 절삭유이다. 사용된 수용성 절삭유는 비수용성 절삭유와 같이 소각처리 하기에는 비용이 크며, 수계로 유출시 COD 약 30,000~100,000ppm의 고농도 유기성분에 의해 인근 수계를 오염시킬 수 있으므로 각별한 처리가 필요하다. 따라서 본 연구에서는 Ti-IrO<sub>2</sub>전극을 이용하여 NaCl 첨가, 인가전압 변화를 통해 수용성 절삭유 내 오염물질의 전기화학적 처리에 미치는 영향을 검토하고, 수용성 절삭유의 전기화학적 처리에 대한 기초자료를 제공하고자 한다. 시료는 U사의 W1-1종 수용성 절삭유를 이용하였으며 증류수와 혼합하여 5% 농도의 인공 시료를 제조하였다. 시료의 특성은 Table 1, 실험 조건은 Table 2에 나타내었다.