Alfa Laval PureBallast 135 Compact USCG, System Manual

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2.2.5.1 Deballast after-treatment (CIP process)
After deballast operation, a cleaning cycle is performed to clean the UV
reactor. It is performed in the same way as described for the ballasting
process. If only deballast operations has been performed since the last CIP
process, the filter is notfilled with technical water / potable water at the end of
the CIP cycle, since the filter has not been used.
2.2.6 Tank stripping
Stripping can be performed to empty the ballast tanks. A stripping process is
similar to a deballast process; in both processes the filter is bypassed.
After the start-up, when the lamps are ready, the operator is requested to start
a stripping pump. Pump used can either be a dedicated stripping pump or a
ballast water pump. Power optimization is not active. Minimum flow includes
the driving water.
Stripping
2.2.6.1 Stripping after-treatment (CIP process)
After stripping operation, a cleaning cycle is performed to clean the UV
reactor. It is performed in the same way as described for the ballasting
process. If only stripping operations has been performed since the last CIP
process, the filter is not be filled with technical water / potable water at the end
of the CIP cycle, since the filter has not been used.
2.2.7 Ballast water handling in the event of malfunction
PureBallast is equipped with a bypass valve. The valve can be used in case of
emergency to secure the ship, by allowing ballast water operations (ballast,
deballast and heeling) without involving the ballast water treatment system.
The valve is controlled by the ISCS, not PureBallast’s control system, but all
bypass valve activities are logged in the event log. Such valve is required by
the
International Convention for the Control and Management of Ship’s Ballast
Water and Sediments 2004 .
200000695-1-EN-GB 25
System description 2 EN