TECHNICAL • BALLAST WATER


Evoqua introduces more compact BWM system


For shipowners, Ballast Water Management (BWM) systems are nothing but sunk cost. As Evoqua business manager Matt Granitto cheerily points out, they are analogous to ‘coffins’ – an expensive product ‘nobody wants, but guess what, everyone needs’.


Happily, over the last five years, his company has devised something less macabre. A self-confessed late entrant to the market Evoqua has refined its 2012-model SeaCURE system into a modular version with what global vp Ian Stentiford describes as ‘the smallest footprint on the market’.


‘Our product was robust and high quality enough to meet IMO regulations and our customers’ requirements, but cost is key,’ Stentiford explains. ‘We engaged with our customers who told us it needed to be low cost, simple, with minimal on-site installation work.’


Through extensive R&D work Evoqua has managed to refine its core


Evoqua’s new system is 76% smaller and 85% lighter than the original


technology – concentric tube electrode cells dubbed Chloropac – an effort culminating in a new device only 24% of the size and 15% of the weight of the 2012 original.


With more efficient electrodes, much more NaCIO can be generated per unit of seawater, making it possible to decrease the system’s size. The design can function, too, as a Marine Growth Prevention System (MGPS), replacing short-lived copper anodes – even enabling a small ROI, albeit in specific cases.


Rather than creating one-offs for every install, Evoqua has devised a modular subassembly of four EC tubes, which stack against a box containing the ancillary kit. Each four-tube electrolyser module is equivalent to 10.1kg of NaCIO per hour, and the system can fit up to 20 tubes per stack. ‘The only thing that changes is the number of tubes,’ Stentiford explains. Evoqua is thereby able to ensure that SeaCURE will have the same footprint, whatever the ballasting requirement of the vessel.


Ecochlor BWTS wins important Minerva fleet deal


Ballast Water Treatment System provider Ecochlor of the US marked a double milestone in mid-April, submitting its Ecochlor BWTS to the US Coast Guard


for approval and securing a deal with Minerva Marine to retrofit the system on up to 30 bulkers and tankers under Minerva’s management.


Minerva officials commented that their company was committed to compliance with both USCG and IMO ballast water treatment regulations and anticipated Ecochlor would receive USCG Type Approval shortly.


Tom Perlich, Ecochlor founder and president,


said that the sysyem’s ‘efficacy in all water types, low power and flexible installations, were key conditions in their decision.’


The Ecochlor BWTS uses a two-step process to treat ballast water – filtration followed by disinfection with chlorine dioxide. The company claims that the system’s effectiveness is not impaired by variations in salinity, temperature, turbidity, organics, and vibration, which can impact other treatment options, and that its small size, low power, and low maintenance characteristics make it ideally suited for installation on mid- to large-sized vessels. In Minerva’s case, the system will be fitted on ships ranging in size from MRs to VLCCs.


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Seatrade Maritime Review • Quarterly Issue 2 • June 2017 93


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