• Proceedings of KOSOMES biannual meeting
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• 2006.05a
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• pp.103-108
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• 2006

Treatment of O/W Emulsion is very important to develop 15ppm Bilge Separator for new IMO regulation It is too difficult to demulsify the emulsion in the bilge waste water, so we use chemical treatment to break emulsion stability. Broken oil particle is treated by flotation 15ppm Bilge Separator on the Ship doesn't have enough time to treat Bilge waste water because of limited space in the ship. For the solution to this problem, we experiment to find primary factors as coagulant, pH, amount of inputting coagulant, and type of flotation. On the basis of test results, we decided primary factors.

• Journal of Advanced Marine Engineering and Technology
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• v.25 no.2
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• pp.311-320
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• 2001

Since 1998 for protection of marine pollution, all ships must have oil filtering equipment and 15ppm bilge alarms which satisfy Requirements of MARPOL 73/78. Oily-water separator used in machinery area of ships usually consists of two parts; one is filtering equipment and the other is oil content meter(OCM). This study presents optical characteristics of bilge were acquired form oil content sensing module. The oil content sensing module consists of IR-LED light source, photo-diode light receivers, and a glass tube for bilge water sample. The experiment with the bilge water demonstrates various valuable optical properties. These optical properties suggest notes and guides to make the low-cost, easy operation and good performance commercial type OCM that satisfy the requirements of MARPOL 73/78.

• Journal of Advanced Marine Engineering and Technology
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• v.25 no.2
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• pp.338-344
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• 2001

According to the MARPOL 73/78 of Convention, all ships should have oil filtering equipment and 15 ppm bilge which satisfy Requirements of MARPOL 73/78. This study is concerned with designing and manufacturing a prototype Oil content Meter(OCM) used in machinery area of ship. The prototype OCM is composed of two parts which are oil content sensing module and data processing unit. The oil content sensing module consists of infra-red light source, photo-diode light receivers, and a glass tube for bilge water sample. The data processing unit has a micro-processor as hard core and peripheral devices. The experimental results of prototype OCM and analysis of collected data reveal linear property between transmitted light and scattered light as long as the bilge water has low level content of oil. And this linear property leads to a oil content detecting method which is programmed and loaded into the data processing unit. The performance of the prototype OCM is compared with that of the commercial OCM in the market.

• Journal of the Korean Society for Marine Environment & Energy
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• v.4 no.2
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• pp.52-60
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• 2001

The need to control the oil content in oily bilge water discharges to meet the increasing stringent seawater pollution standards has led to the development of gravity type separators. Among the several gravitational methods, a plate type oily water separator can be used as an assistant equipment for the oil filtering system to meet the present IMO standard of 15 ppm, because it is believed to be an efficient method dealing with a large amount of rich oil with high specific gravity. The purpose of this paper is to examine the efficiency of oil/water separation with the characteristics of separating plate arrangement. An experimental study was carried out to analyse an efficient treatment oil-water mixture with variation of operating parameters, including flow rates, inlet oil concentrations and the height between the plates. The experimental results show that the height between the plates has a significant effect on the separation efficiency. The best efficiency was acquired when the ration of the height between the plates the plates to distance(H/Ci) was 2 with lower inlet oil concentration and lower flow rate.