Ballast Water Management Plan, Water Treatment Process | Kalf

Research & Development

Ballast Water Management

KALF’s extensive knowledge in electrolytic technology and years of research has led to the development of different kinds of electrochemical cell, electrodes and catalytic coatings required for the water treatment process. Using electrochemical system as part of the disinfection process, we have successfully developed the electro-cell with special coating for treatment of ballast water and we branded it as elysisGuardTM


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Ballast water is pumped onboard by the ballast pumps and filtered by a mechanical, fully automatic backflushing filter with a 40 micron screen.

Untitled-4 copyelysisGuardTM electrochemical cells produces active substances and relevant chemicals at easily detected concentrations as follows:

Hydroxylradical, OH•
recognized in biological systems as the most active reactive oxygen species, can cause organisms of DNA, protein and lipids oxidative damage. It is also a very reactive oxidative species with half-life in the order of nanoseconds, thus never leaving the reactor. Secondary radicals may also be formed in minute amounts as intermediates in the degradation processes of other oxidative species. The hydroxyl radical will be referred to as an “Active Substance” of this electrochemical disinfection method.


Active Chlorine
Due to the sea water content of chloride ions, small amounts of chlorine gas (Cl2) will form as a by-product on the anode surface. By further favourable interactions with the cathode in our elysisGuardTM cell design, it immediately form other free active chlorine species (5 – 10ppm) HOCl and/or OCl- depending on the pH. These small amounts of free active chlorine will contribute to prevent re-growth / bio-fouling in the ballast tanks and to the most extent ultimately degrade back into chloride ions. Due to the composition of the elysisGuardTM electrochemicalcell, the primary produced chlorine gas will (by cathodic interactions with water) form the active chlorine species rapidly, thus preventing the formation of harmful chlorinated organics such as for example THMs. Free active chlorine will be referred to as —Active Substance“ due to their oxidative and disinfective characteristics.


is made of oxygen and reverts to pure oxygen, a trace of by product ‘O3’ produced from elysisGuardTMelectrochemical cell, it vanishes without trace once it has been used.


Hydrogen gas, H2(g)
will be formed at the cathode due to water electrolysis (Max. 0.5%) however, due to the composition of the electrochemical cell, the main cathode reactions will be reduced to oxygen gas (O2) and small amounts of chlorine. Hydrogen gas will be referred to as a “Relevant chemical” in this application due to the explosive nature of this gas.