Alfa Laval PureBallast 135 Compact USCG, System Manual

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3.1.1.1 Compliant / non-compliant operation
To optimize operation, all ballast and deballast operations should be done
using PureBallast according to system manual, and the system should be
maintained.
However, in some cases there is a risk that ballast water is not treated
according to requirements, or contaminated by untreated water.
A process is not compliant in the following cases:
• Water was ballasted with IMO mode, when the destination port is within US
waters.
• PureBallast was bypassed (Alarm A33, 66, 67 and 68)
• Operation with higher flow rate than certified (Warning W12)
• System not CIP cleaned within time (Warning W140)
• Operation with one or more non-functioning lamp (Warning W130, W131)
• UV intensity lower than limit stated in the type approval certificate (Warning
W151, W152, W154).
• The ballast water is contaminated by untreated water from other pipes, i.e.
there are living organisms in the water. Even a very small amount of water,
a few hundred liters, can contaminate a ballast tank and cause non-
compliance during a compliance test. It is therefore important that
PureBallast is always used for operation. The reason for this can be:
• Leaking valves, if there is untreated water present in the piping.
• Internal transfer between tanks can contaminate tanks, if untreated
water is present in the piping.
• Sediment in tanks is a breeding ground for organisms. Therefore it is
important to review the vessel’s ballast water management plan
regarding frequency of sediment removal.
Solution to non-compliant operation
If the ballast water is not fully treated or contaminated by untreated water, a
ballast water exchange must be performed, making sure that the tanks and
pipes (including dead ends) are flushed and replaced with treated water.
Ballast water exchange
The ballast water exchange must be done
• using Pureballast in USCG mode, both at deballast and ballast.
• before entering US territorial water.
• at a location where ballast water exchange is accepted.
• minimum 200 NM from the US coast. Note that mid ocean is most
favourable, since UV transmittance is very high and the biological activity is
low.
It is also possible to contact the captain of the port zone, both at origin and at
destination. They will inform of what measures to be taken.
200000695-1-EN-GB 41
Operating instructions and control system description 3 EN