Monday, June 1, 2015

Ballast Water Treatment System is Armour Plated

Explosion Proof Technology Approved by US Coast Guard
Shipping News Feature

US – The advancement of water treatment systems aboard all manner of merchant vessels has been rapid as the threat of pollution from chemicals and alien life forms has at last been recognised and acted upon. Safety aboard chemical and oil tankers has driven specific technologies and now the explosion-proof version of Alfa Laval’s chemical-free ballast water treatment system, PureBallast 3.1 EX, has received approval from the US Coast Guard for use on barges sailing in US coastal waters. The approval comes a year after Alfa Laval PureBallast received an IECEx Certificate of Conformity from the International Electrotechnical Commission (IEC) for use in explosive atmospheres on board ships in international waters.

As a pioneer in the ballast water treatment arena, Alfa Laval introduced PureBallast, the first commercial chemical-free ballast water treatment system in 2006. Three years later, the company launched PureBallast 2.0 EX, which complied with ATEX directives, the European Union Directives for equipment use in potentially explosive atmospheres, such those on tankers carrying volatile cargo. Now this third-generation ballast water treatment system is approved for use on barge applications sailing in US coastal waters, making it one of the first to be approved by the US Coast Guard.

In addition to the latest approval, PureBallast EX comes with other noteworthy news regarding safety. To enhance safety onboard, Alfa Laval simplified the PureBallast design, enabling the lamp drive cabinets to be placed up to 150 metres away from the reactors they serve. This means the power supply can be safely located outside any potentially hazardous zone. Alfa Laval’s Stephen Westerling Greer, Global Business Manager of PureBallast, observed:

“We’re pleased that PureBallast EX meets the stringent criteria for approval by the US Coast Guard. US Coast Guard approval, together with IECEx certification, sends a strong signal to ship owners and operators that they can trust our ballast water treatment system to comply with strict national and international regulations while effectively cleaning ballast water.

“We’ve also introduced a new PureBallast reactor for system sizes from 170 m3/h to 32 m3/h, our customers have access to leading edge technologies for a broader range of applications. Alfa Laval is now able to offer ship owners with vessels, large and small, the means with which to comply to international, national and regional regulations and local port requirements the world over.”

Westerling Greer says that there are other PureBallast innovations that enhance system performance, making it more attractive to ship owners and operators. These include 50% space savings, energy management and power ramp to optimise disinfection treatment whilst operating at full flow in low-clarity waters where UV transmittance is just 42%.

Photo: Looking a little like an escapee from Dr Who the PureBallast 3.1 EX