• Environmental Engineering Research
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• 제24권4호
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• pp.711-717
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• 2019

The application of advanced oxidation for the treatment of oil refinery wastewater under UV radiation by using nanoparticles of titanium dioxide was investigated. Synthetic wastewater prepared from phenol crystals; Power Glide SAE40 motor vehicle oil and water was used. Response surface methodology (RSM) based on the Box-Behnken design was employed to design the experimental runs, optimize and study the interaction effects of the operating parameters including catalyst concentration, run time and airflow rate to maximize the degradation of oil (SOG) and phenol. The analysis of variance and the response models developed were used to evaluate the data obtained at a 95% confidence level. The use of the RSM demonstrated the graphical relationship that exists between individual factors and their interactive effects on the response, as compared to the one factor at time approach. The obtained optimum conditions of photocatalytic degradation are the catalyst concentration of 2 g/L, the run time of 30 min and the airflow rate of 1.04 L/min. Under the optimum conditions, a 68% desirability performance was obtained, representing 81% and 66% of SOG and phenol degradability, respectively. Thus, the hydrocarbon oils were readily degradable, while the phenols were more resistant to photocatalytic degradation.

• 분석과학
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• 제16권5호
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• pp.399-406
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• 2003

본 연구는 수소화물 발생장치가 부착된 원자흡광 광도계 (HG-AAS)를 이용하여 비교적 고농도의 Se을 함유하고 있는 석유정제 폐수의 Se 분석을 위하여 적합한 분석조건을 선정하고자 수행되었다. Se(VI)의 Se(IV)로의 환원 실험에서 폐수량 10 mL, 염산 주입량 10 mL, 가열시간 30분이 최적 환원조건으로 결정되었다. 폐수의 조성성분과 유기물의 농도가 높은 경우에는 Se 회수율이 감소하였다. 따라서 3가지 산분해법 ($HNO_3/HClO_4$ 분해, $KMnO_4$ 분해 및 초단파 산분해)에 의한 유기물, 석유화합물 분해 및 유기성 Se(org.), Se(IV) 산화에 따른 Se 회수율을 검토하였다. 실험결과 산분해전 약 50~80%이었던 Se 회수율은 모든 산분해에서 90%이상이었으며 특히, 초단파 산분해에 의한 Se 회수율이 가장 높은 것으로 나타났다. 그러므로 HG-AAS를 이용한 석유정제 폐수의 Se 분석시에는 초단파 산분해후 염산 처리를 하는 전처리 과정이 가장 적합한 것으로 나타났다.

• 한국수산과학회지
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• 제8권2호
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• pp.73-84
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• 1975

1) 호남정유공장 폐수 및 부근에 버려진 유류와 사포리의 원유저장 탱크에서 흘러나온 유류는 썰물을 따라 여수해만 쪽으로 흘렸다가 밀물을 따라 백합양식장으로 바로 흘러 들어가며 대조일의 조수에서 $6\~8 $시간만에 양식장 전역에 이른다. 2) 지점 9, 10은 강수의 혼입이 약간 많은 수질인 즉 pH가 상대적으로 낮고 암모니아 질소가 많고 n-헥산 가용물질량이 적은 편이지만 지점 $6\~10$은 수질이 동일하다. 3) 폐수배출관이 있는 지점 2에서의 수질은 표층, 중층, 하층에 별다른 차가 없다. 4) 호남정유공장 폐수에 있어서 유해성분으로서 pH, 황화물이 배출기준 보다 높고, COD, 페놀, n-확산 가용물질량은 배출 기준보다 낮은 편이나 n-헥산가용물질량은 상당히 높은 수준이라고 본다. 5) 호남정유공장 폐수에 함유되어 있는 유해성분의 각 수역에서의 농도는 n-확산가용성 이외는 정상해수와 별로 다른 바 없다. 그러나 n-확산가용물질의 농도는 정상해수보다 높다. 6)해역에서의 n-헥산가용물질량 및 COD 값이 Table 1에서 볼 때 공장에 가까운 수역일수록 높은 것으로 보아 백합양식장에서의 이들 성분농도가 높은 원인은 해구유동도 참작할 때 호남정유공장의 폐수 및 누출유에 있다고 본다.

• 멤브레인
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• 제10권4호
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• pp.220-229
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• 2000

본 연구는 한외여과 중공사형 모듈과 역삼투 나권형 모듈로 구성된 모듈 set 1∼7을 이용하여 모듈 set에 따른 순수 및 2차 처리수의 투과 flux를 고찰하고, 적용압력과 온도변화에 의한 한외여과 막과 역삼투 막의 분리 특성을 고찰하였다. 탁도와 SS는 한외여과 막에서 효율적으로 제거되며 COD, T-N, TDS 등은 역삼투 막에서 우수한 제거효율을 나타내었다. 적용압력과 온도의 증가에 따른 투과 flux는 선형적으로 증가하는 경향을 보였다. 이로부터 한외여과 및 역삼투 막은 정유공장 방류수의 고도처리 및 재활용을 위해 적합한 것으로 나타났다.

• 상하수도학회지
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• 제24권4호
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• pp.395-406
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• 2010

In this study, anaerobic digestion, electro-oxidation and electro-fenton oxidation processes were investigated to reduce oily refinery sludge. Anaerobic digestion process was not suitable for oily activated sludge reduction because of characteristics itself and, as experimental results revealed, reduction efficiency was low for electro-oxidation process. However, 40% total suspended solid reduction of oily activated sludge was obtained by electro-fenton oxidation process, operating at pH=1, 0.5 A and $Fe^{2+}$:$H_2O_2$ ratio = 1:30. In addition, higher reduction efficiency was obtained as reaction time was increased (30, 60, 90, 120 min) despite of low $H_2O_2$ concentration. From the results, it has been investigated that electro-fenton oxidation is efficient process for oily activated sludge reduction.

• Journal of Microbiology and Biotechnology
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• 제11권4호
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• pp.570-576
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• 2001

Thermophilic aerobic bacteria were applied in the degradation of industrial waste activated sludge (WAS) on a laboratory scale expreiment. The performance of digestion was estimated by measuring the reduction of total suspended solids (TSS), dissolved organic carbon (DOC), and total organic carbon (TOC). Among three strains of Bacillus stearothermophilus and three strains of Thermus species, B. stearothemophilus ATCC 31197 showed the best overall efficiency level for the degradation of industrial WAS, which was collected from a wastewater treatment plant in an oil refinery factory. Industrial WAS coul be successfully detraded in a batch digestion with ATCC 31197. The stability of the digestion process with ATCC 31197 was successfully verified by semi-continuous (fill-and-draw) digestion experiment. From the results of this study, it was shown that the thermophilic aerobic digestion process with ATCC 31197 could efficiently be applied to the degradation of industrial WAS.

• 한국대기환경학회지
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• 제21권3호
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• pp.315-327
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• 2005

The total of 35 target VOCs (volatile organic compounds), which were included in the TO-14, was selected to develop a VOCs' source profile matrix of the Yeosu Petrochemical Complex and to test its collinearity by singular value decomposition(SVD) technique. The VOCs collected in canisters were sampled from 12 different sources such as 8 direct emission sources (refinery, painting, wastewater treatment plant, incinerator, petrochemical processing, oil storage, fertilizer plant, and iron mill) and 4 general area sources (gasoline vapor emission, graphic art activity, vehicle emission, and asphalt paving activity) in this study area, and then those samples were analyzed by GC/MS. Initially the resulting raw data for each profile were scaled and normalized through several data treatment steps, and then specific VOCs showing major weight fractions were intensively reviewed and compared by introducing many other related studies. Next, all of the source profiles were tested in terms of degree of collinearity by SVD technique. The study finally could provide a proper VOCs' source profile in the study area, which can give opportunities to apply various receptor models properly including chemical mass balance (CMB).