RWO has developed the modular CleanBallast technology, which reliably removes
organisms, sediments and suspended solids in just two steps. These are
the DiskFilters for filtration of particles, sediment and organisms larger than
55µm when taking in ballast water, followed by the advanced electrochemical
disinfection unit EctoSys® to efficiently disinfect the remaining smaller organisms
and bacteria before the water reaches the ballast water tanks. During
the ship‘s voyage to the next port of call, a regrowth of organisms in the ballast
water tank may occur. To assure a constant quality of the discharged water, the
CleanBallast system is thus used during de-ballasting again, whereas the Disk-Filter system is bypassed and only the EctoSys® disinfection is required at deballasting.
This assures a disruption-free and clean water cycle – from ballasting
to de-ballasting – regardless of river, brackish or seawater.
The DiskFilter combines the advantages of in-depth filtration with those of a
screen filter and is therefore the most effective solution for treating waters of different
and heavy loads at exactly defined filtration grades. The filtration is carried
out by a number of individual filter discs, which are corrugated on the top and the
bottom corresponding to the filtration grade required. This fast and efficient system
ensures maximum net ballast water production even at high sediment loads.
Advanced electrolysis disinfection - The EctoSys® solution
The EctoSys® disinfection technology is an extremely efficient and robust system
working both in seawater and river water. It provides a reliable and sustainable
disinfection of the ballast water in an economical, ecological and operator-friendly
way.
By applying electricity to the special electrodes arranged in the cell, disinfectants
are produced from the water directly in the piping. Due to the chemical and electrochemical
properties of the electrodes used, they produce – among other disinfectants
– very short-living and reactive hydroxyl (OH) radicals* which eliminate
bacteria and organisms.
EctoSys® also stands out for fulfilling its function in waters with higher salt
content, meaning in sea and brackish water, and also in river water with low salt
content, whereby it differs greatly from standard chlorine electrolysis.
In river water with low salinity, the EctoSys® unit produces only hydroxyl radicals
as active substances. The produced hydroxyl radicals have an extremely short
lifetime and therefore give no response to Total Residual Oxidant analysis. If brackish
water or seawater is treated, the produced active substances are short-living
hydroxyl radicals and chlorine/bromine. The residual disinfectants chlorine and
bromine can be analysed as Total Residual Oxidant (TRO).
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| RWO Ballast Water Treatment Brochure |
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| RWO Ballast Water Treatment PowerPoint |
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