• Title/Summary/Keyword: oil water separation

Search Result 132, Processing Time 0.02 seconds

Conditioning and Characteristics of the Sea Water containing Heavy Oil (유독해수(油獨海水)의 조정(調整)과 성장(性狀)에 관한 연구(硏究))

  • Cho, Bong-Yeon;Hwang, Yong-Woo;Kim, Jong-Guk
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.12 no.2
    • /
    • pp.31-41
    • /
    • 1998
  • As the leakage of crude oil from tankers breaks out frequently, it caused a serious problem for ocean pollution and calls for developing treatments to handle the leaked crude oil and mitigate the pollution. Thus it is required to develop new purification technolgies and appropriate treatment systems which have sufficient treatment capability in order to cope with the anticipated ocean pollution. In this experiment, A and B type heavy oils were used to make the emulsion of both water containing heavy oil and sea-water containing heavy oil. The following are the main results from this study ; 1. When A and B type heavy oils were added to the original sea-water and treatedin the homogrenizer respectively, the particle of oil beacame smaller in both cases. Under the same condition, while the initial oil density of sea-water containing B-heavy oil is higher than of emulsion with A-heavy oil, the particle of A-heavy oil is finer than that of B-heavy oil. 2. When A and B type heavy oils were added to distilled water and treated in the homogenizer respectively, the particle was more dispersed and finer than that in the case of sea-water in both cases. In this result, the water containing oil formed more stable emulsion than the sea-water containing oil. 3. In this experiment, all emulsions showed oil in water types. 4. Since the oil particle is larger in the sea-water than in the distillated water, interms of elimination of oil, it is thought to be more important to give Membrane treatment after implementing sandfilter, activity carbon, coagulation-sedimentation and floating separation as pre-treatment.

  • PDF

Preparation of $TiO_2$ Microfiltration Membranes for Water/Oil Separation (Water/Oil 분리를 위한 정밀여과용 $TiO_2$ 세라믹막의 제조)

  • 한상욱;최세영;현상훈;조철구;하호관;강환규
    • Proceedings of the Membrane Society of Korea Conference
    • /
    • 1995.04a
    • /
    • pp.67-67
    • /
    • 1995
  • Metal-working lubricants, metal-finishing bath wastes, mechanical oil-water emlsion 등과 같은 공업 폐수들은 보통 0.1 $\mu$m 이하의 크기를 가지는 oil-in-water 에멀젼이 약 2 wt% 정도 포함되어 있어, oil의 함량이 30 wt% 이상이 되도록 농축시킨다면 재사용이 가능하게 되며, 정밀여과막이나 한외여과막으로 oil을 분리할 수 있다. 본 실험에서는 압출성형법으로 제조한 튜브형 다공성 $\alpha-Al_2O_3$ 담체(평균 기공 크기 = 0.7 $\mu$m, 길이:200,600mm, 직경:8mm, 두께:0.8mm) 위에 슬립 캐스팅법을 이용하여 TiO$_2$ 막을 코팅한 후 925$\circ$C에서 2시간 동안 열처리하여 정밀여과용 세라믹 막을 제조하였다.

  • PDF

Experimental determination of liquid entry pressure (LEP) in vacuum membrane distillation for oily wastewaters

  • Racz, Gabor;Kerker, Steffen;Schmitz, Oliver;Schnabel, Benjamin;Kovacs, Zoltan;Vatai, Gyula;Ebrahimi, Mehrdad;Czermak, Peter
    • Membrane and Water Treatment
    • /
    • v.6 no.3
    • /
    • pp.237-249
    • /
    • 2015
  • In this study we investigate a laboratory scale vacuum membrane distillation system to produce pure water from model oil in water emulsion. Experimental determination of liquid entry pressure (LEP) of a commercial Durapore$^{TM}$ GVPH flat sheet membrane using model emulsions in various oil concentrations has been carried out. Two different methods of liquid entry pressure determination - a frequently used, so-called static and a novel dynamic method - have been investigated. In case of static method, LEP value was found to be 2.3 bar. No significant effect of oil content on LEP was detected up to 3200 ppm. In contrast, LEP values determined with dynamic method showed strong dependence on the oil concentration of the feed and decreased from 2.0 bar to a spontaneous wetting at 0.2 bar in the range 0-250 ppm, respectively. Vacuum membrane distillation tests were also performed. The separation performance is evaluated in terms of flux behavior, total organic carbon removal and droplet size distribution of the feed and final retentate. No significant effect of oil content on the flux was found ($5.05{\pm}0.31kgm^{-2}h^{-1}$) up to 250 ppm, where a spontaneous wetting occurred. High separation performance was achieved along with the increasing oil concentration between 93.4-97.0%.

The Effect of Coagulation for Dispersion Modelling of Spilled Oil (해상유출유의 분산모델링에 대한 응집효과)

  • 설동관
    • Journal of Ocean Engineering and Technology
    • /
    • v.14 no.2
    • /
    • pp.44-52
    • /
    • 2000
  • The dispersion of surface oil is generally described as a break-up of oil slick into small oil droplets. These small droplets are subjected to turbulence and vertical circulation so that it can be entrained into subsurface. Sometimes they tend to be submerged into sea bottom permanently. The diameter of oil droplets is a critical parameter to determine their behavioral characteristics under water surface. At the same time the variations of droplet stability depends on the weathering of it. That is why the weathered oil has different mechanism from the unweathered one. The variability of physical properties of oil including viscosity and density contribute to interfere with effective separation of oil and emulsion droplets in water. Also in the presence of interactions among the droplets there are coalescing or coagulating effects on the dispersion process of droplets.

  • PDF

Development of the low Emission type Fuel Feeding System for Diesel Automobile I (Characteristics and Spray of Emulsified Fuel) (디젤자동차의 저공해형 연료공급장치 개발 I (유화연료의 특성 및 분무거동))

  • Cho, S.C.;Yoon, M.K.;Ryu, J.I.
    • Journal of ILASS-Korea
    • /
    • v.2 no.3
    • /
    • pp.8-16
    • /
    • 1997
  • Ta investigate characteristics and spray of emulsified fuet we are mixed water with diesel oil using ultrasonic energy fuel feeding system. Separation ratio of emulsified fuel was shown good condition that of water content is small and longer ultrasonic energy adding time. Viscosity of emulsified fuel increased 79% with addition to water content and surface tension increased 1.6% in comparision to pure diesel oil. The SMD of emulsified fuel adding ultrasonic energy decreased with 3% in comparision to pure diesel oil. With increasing 5, 10% water content the SMD decreased 15.6, 20.1% in comparision to pure diesel oil. The mind-explosion was investigated with 4step.

  • PDF

Effect of Extraction Solvent on the Separation of Sulfur Components in Light Cycle Oil (접촉분해경유로부터 산화황화합물의 분리에 관한 추출용매의 영향)

  • Park, Su-Jin;Jeong, Kwang-Eun;Chae, Ho-Jeong;Kim, Chul-Ung;Jeong, Soon-Yong;Koo, Kee-Kahb
    • Korean Chemical Engineering Research
    • /
    • v.46 no.5
    • /
    • pp.965-970
    • /
    • 2008
  • The separation of sulfone components using light cycle oil(LCO) after oxidation was carried out by solvent extraction method using various polar solvents such as water, n-methyl-2-pyrrolidone(NMP), dimethyl sulfoxide, ethyl acetate, acetonitrile, dimethyl formamide, and methyl alcohol. It was found that phase separation between LCO layer and solvent occurred under mixed solvent adding a proper amount of water. The mixture solvent of NMP and water was a promising extraction solvent due to the selective removal and high distribution coefficient of sulfone component in LCO. 99.5% over of sulfur contents in LCO can be removed by 4 stages equilibrium extraction.

Biodegradation of Cutting Oil by Pseudomonas aeruginosa KS47 (Pseudomonas aeruginosa KS47에 의한 절삭유의 생물학적 분해)

  • Kim, Lan-Hee;Lee, Sang-Seob
    • Korean Journal of Microbiology
    • /
    • v.44 no.1
    • /
    • pp.22-28
    • /
    • 2008
  • Cutting oils are emulsionable fluids widely used in metal working processes. Their composition is mineral oil, water, and additives (fatty acids, surfactants, biocides, etc.) generating a toxic waste after a long use. Cutting oils also affect colour, taste and odour of water, making it undesirable for domestic and industrial uses. In these days, conventional treatment methods as evaporation, membrane separation or chemical separation have major disadvantages since they generate a concentrated stream that is more harmful than the original waste. In this study, our purpose is to reduce cutting oils by using biological treatment. Eighty one strains were isolated from cutting waste oil of industrial waste water sludge under aerobic conditions. Among these strains, KS47, which removed 90.4% cutting oil in 48 hr, was obtained by screening test under aerobic conditions(pH 7, $28^{\circ}C$). KS47 was identified as Pseudomonas aeruginosa according to morphological, physiological and biochemical properties, 16S rDNA sequence, and fatty acid analysis. P. aeruginosa KS47 could utilize cutting oil as carbon source. In batch test, we obtained optimal degradation conditions(1.5 g/L cell concentration, pH 7, and temperature $30^{\circ}C$). Under the optimal conditions, 1,060 mg/L cutting oil was removed 83.7% (74.1 mg/L/hr).

A Study on the Flow Characteristics for the Plate Chamber in Type of Oily Parallel Plate Water Separator (평행판식 유수분리기에서 분리판실의 유동특성에 관한 연구)

  • Kim, J.H.;Han, W.H.
    • Journal of Power System Engineering
    • /
    • v.5 no.1
    • /
    • pp.64-72
    • /
    • 2001
  • According to the regulation of IMO, oil discharge from ships is allowed under 15ppm only and an oil filtering equipment is essential. However, for large ships using heavy fuel oil of over S.G 0.98 and viscosity 380cSt and system oil, it has been in difficulty to process with existing filtering type of oily water separator. A parallel plate type oily water separator which is one of gravity type separators can be used as an assistant equipment for the oil filtering system to meet the present IMO standard of 15 ppm, because it is an efficient method in dealing with a large amount of rich oil with high specific gravity. This work is focused on the fundamental investigation of the performance of the plate type oily water separator by visualization method and PIV(Particle Image Velocimetry) measurement to acquire multi-point velocity data simultaneously. The experimental results showed that the space of the plates acts a significant role in separating process and it was found that an important point to minimize a vortex flow is to flow a large amount of fluid in space of the plates in order to promote the efficiency of separation.

  • PDF

Development of a purifying system to separate minute solid particles and water in oil (오일 속 미세입자 및 수분분리를 위한 청정기 시스템 개발)

  • Kim, Yong-Keun;Choi, Yoon-Hwan;Moon, Myung-Jun;Lee, Yeon-Won
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.41 no.1
    • /
    • pp.44-49
    • /
    • 2017
  • In this research, a purifying system using a centrifugal filter equipped with a water separation component has been studied. Oil utilized for lubrication and cooling in marine engines becomes unable to achieve its original purpose over time as the accumulation of solid particles and water increases. Therefore, methods applying the Bernoulli equation to eliminate water in oil were investigated and proposed. As a result, a practical purifying system was designed and tested by an officially certified organization. The new purifying system is anticipated to contribute to the extension of the lifetime of oil in addition to damage reduction methods of mechanical parts.