Page 28: of Maritime Reporter Magazine (May 2002)

The Environment volume was 10 tons of water in 80-ton sludge tank. The volume of SpillRemed (Marine) added was 55 gallons and no aeration was provided. The ship staff reported that there was no visible reduc- tion of oi l. It was also ascertained from the ship that the residence time for reme- diation by SpillRemed was just four days with fresh additions of waste oil during the period. It is obvious that there was no time given for bacteria in

SpillRemed to interact with the bilge oil before it was discharged to the port receiving facility.

Unfortunately, the trials were not con- tinued and it is believed that if the reme- diation was carried out in the bilge tank containing OWS the amount of oil would have been reduced considerably and load on the OWS would also have been less.

Cost Evaluation

In the case of bilge water treatment using SpillRemed (Marine) there is nei- ther installation cost nor any cost of transportation of wastewater. Bilge water is treated at the site itself and if the residence time of bilge water is ade- quate, the bilge water can be treated on the ship itself.

Unlike bilge water transport cost, which consists of both oil and water, cost of SpillRemed (Marine) is based on the concentration of oil only. One gal- lon of SpillRemed can treat 10 gallons of oil and works out to be less than $1 for every liter of oil.

It is estimated that bilge water would contain about 10 percent oil of the total volume. Computing this value would indicate the total cost of treatment of bilge water employing SpillRemed (Marine) even on shore in centralized systems.

There is neither need of transportation of wastewater nor any liability when the oily wastewater is treated with Spill-

Remed. SpillRemed can thus contribute directly in a most cost effective manner in reducing the oil pollution at source either in the ship itself or at the shore receiving facilities.

Acknowledgements

We would like to express our gratitude to

I. Mikedis, Superintendent Engineer,

Celebrity Cruises for giving us an opportunity in conducting a shipboard trial. We would like to thank the ships

Chief Engineer Georgios Mylonakis for providing samples of bilge for bench scale studies and also providing facili- ties during trials of SpillRemed (Marine).

We would like to take this opportunity to thank all the members of the engineer- ing department for their help and encouragement during trial period.

Trials on the ship could not have been initiated but for the evaluation of com- patibility of SpillRemed (Marine) with

MarineFloc Oil Water Separators by

Martin Gombrii of the manufacturing company in Sweden. We are grateful to the company for conducting the evalua- tion without any cost.

We are thankful to Alan Tweten, Pres- ident Aquatech Enviro Sys Ltd. for his help in conducting trials on the wooden boats and providing with a sample of bilge water for analysis.

Also, Glen Phillip, Owner of Celtic

Charter Services for his help in evalua- tion of SpillRemed on Aluminum boats in California.

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Circle 233 on Reader Service Card or visit www.maritimereporterinfo.com 28 Maritime Reporter & Engineering News

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