GEA Westfalia Separator
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Self-cleaning Centrifugal System
The treatment of bilgewater on board ships is strictly controlled by national and international laws.
Bilgewater may only be discharged into the sea after prior de-oiling with specially approved treatment systems. The maximum oil content must not exceed 15 ppm. The limit has even been reduced to 5 ppm in special areas.
15 ppm is too much
Oily water from ship operation may only be discharged into the sea if the residual oil content in the effluent is below 15 ppm. 15 parts of oil to one million parts of water seems small but GEA Westfalia Separator Systems believes this is still too high. Moreover, practice has shown that this value is not attained in many conventional plants under practical operation conditions anyway. The further we can reduce this value, the greater the benefit for our oceans.
Bilgewater is a mixture of the following constituents
- Sea and cooling water leakages
- Fuel and lube oil leaks
- Drainages from settling and sludge tanks
- Effluent from various cleaning processes
- Soot and dirt particles
