UV disinfection as being a ballast water management solution | Forum

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wallenjorden Oct 12
Ballast water treatment systems must be approved at fivergroup and certified by an IMO member state as outlined by IMO BWMC Guidelines (G8) for approval of ballast water management systems and, in the event the treatment system uses an 'active substance' i.e. a chemical or chemical process, caffeine or chemical process must be authorized by the IMO relative to IMO BWMC Guidelines (G9). As of October 1 2010, ten BWT systems ended up type approved by member states in the IMO G8 guidelines with several others expected to be authorized during the years to come.

More compared to a decade ago, Hyde Marine, now a Calgon Carbon Corporation company, began setting up a solution to combat the spread of aquatic invasive species, initially for the Great Lakes, and ultimately worldwide.

Teaming on top of stakeholders including customers, regulators, scientists and government departments, Hyde pioneered the utilization of mechanical separation and UV disinfection like a ballast water management solution. The USCG based its type approval of PureBallast on testing conducted from the US Food and Drug Administration at engineering consultancy DHI in Denmark. This testing was performed with similar hardware, power consumption and flow because the IMO-certified version on the PureBallast 3 family. Outside the United States, where PureBallast may be type approved while using the MPN (most probable number) method, the USCG-certified system will are employed IMO mode and also treat water with UV transmittance just 42%.

PureBallast features a flexible construction dependant on four different UV reactor sizes. This allows for optimised sizing and competitive solutions over the wide flow range. The current type approval covers flows of 150-3,000 m³/h based around the 300 and 1,000 m³/h reactor sizes, while type approval for systems dependant on 170 and 600 m³/h reactors is anticipated soon.

A benefit would be that the full spectrum of one's produced from the LED influences effective curing range in the fiber coatings. However, the narrow spectrum from the LED system could also create some challenges when curing fiber optic coatings which were optimized to the broad spectrum of Hg lamps. It is therefore important to accomplish specific material testing together with the LED systems and work closely using the fiber coating supplier so that the required physical properties on the coating are achieved.The UV arc lamps require replacement every 1,000 to 4,000 operating hours, while UV microwave excited lamps require replacement every 6,000 to 8,000 operating hours, increasing costs and process downtime. Other consumable items add the magnetron of UV microwave systems and reflectors which has to be regularly cleaned and replaced. This again ends up with manufacturing downtime and other cost with regard to parts and tech support.