The Integrated Bilge Water Treatment System (IBTS) concept
aims to minimize the amount of oily bilge water in machinery spaces and was promoted by Japan and recognized by the
IMO through its MEPC.1/Circ 642 as an excellent concept to minimize the amount
of oily bilge water generated in machinery spaces and with an integrated means
to process the oily bilge water and oil residue (sludge).
In principle, the IBTS is a concept of an installation
containing a bilge primary tank and proper control of the flow of drain
streams, aiming to segregate as much as possible oily streams from the drain
streams of clean water, and avoid their admixture.
Unfortunately, ships which use oily water separator
systems based on the IBTS concept have reported negative experiences with port
state control officers who are not convinced that ships can generate
significantly low oily water volumes.
To avoid this, Japan and the International Association of
Classification Societies (IACS) have suggested that ships equipped with
installations based on the IBTS concept are given a Statement of Fact, which is
a check list acknowledging that the installation follows the IBTS as described
in MEPC .1/Circ. 642.
INTERTANKO and other ship owner organizations supported
the promotion of IBTS. INTERTANKO recommended that Governments invite ship
designers and ship builders to include IBTS as standard systems in all new
buildings.
Proposed amendments to the IBTS Guidelines and amendments
to the IOPP Certificate and Oil Record Book may be read at,
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