EAL oil cleaned in stern tube on cape size bulk carrier
A cape size bulk carrier had EAL oil contaminated with water, particles and sodium (salt) in the stern tube. A CJC® Desorber/Filter Combi Unit D10 cleaned the oil and removed 45 litres of water in three days.
Case study written by Mr. Mikael Back, Teknoma Oy, Finland
Application Snapshot
Industry:
Marine
Country:
Finland
Oil type:
Castrol BioStat 100 - Environmentally Acceptable Lubricant (EAL) / Biodegradable Oil
Executive summary
The EAL oil in the stern tube on a cape size bulk carrier was contaminated from a high level of water, particles and sodium (salt).
bulk carrier
A CJC® Desorber/Filter Combi Unit D10 was installed (April 14th 2015) and oil samples were taken to follow how the oil had been cleaned.
bulk carrier
In three days the unit separated totally 45 litres of water (15 litres/day) and cleaned the oil from particles and sodium (salt). After 5 weeks, water was reduced from 2.8% (28,000 ppm) to 0.014% (140 ppm) and cleanliness improved from ISO 19/18/10 to ISO 15/14/8.
Oil cleaned from particles and sodium (salt)
The EAL oil was cleaned from particles and sodium (salt) and cleanliness improved to ISO 15/14/8.
Lifetime increased with clean and dry EAL oil
With clean and dry EAL oil, lifetime of both components and oil was increased.
Water removed from the EAL oil
In three days the unit separated totally 45 litres of water (15 litres/day).
Reduced environmental impact
The EAL oil was kept in service after removal of water, particles and sodium (salt), avoiding disposal and replacement of biodegradable oil.
Cleaning EAL oil in the stern tube
Before filtration, the EAL oil contained 2.8% water (28,000 ppm) and had a cleanliness level of ISO 19/18/10. Sodium (salt) and particle levels were also high.
bulk carrier
After installation of the CJC® Desorber/Filter Combi Unit D10, water was continuously separated from the oil. In the first three days alone, a total of 45 litres of water were removed.
bulk carrier
After five weeks of operation, water content was reduced to 0.014% (140 ppm) and oil cleanliness improved to ISO 15/14/8, confirming stable oil condition in the stern tube system.
Measurable results and operational impact
Oil analyses documented a clear reduction in water, sodium and particle levels. Water content decreased from 28,176 ppm at start-up to 140 ppm after one week, while particle counts at 2 µm were reduced from 307,841 to 6,894.
“The unit is working well. In the three first days after the installation the unit separated totally 45 litres of water. The unit is working well and the water was removed from the oil.”
– Chief Engineers, M/S Applila
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