UV disinfection being a ballast water management solution | Forum

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wallenjorden Oct 12
Ballast water treatment systems have to be approved at fivergroup and certified by an IMO member state according to 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, mit or chemical process must be accepted by the IMO prior to IMO BWMC Guidelines (G9). As of October 1 2010, ten BWT systems have been type approved by member states in the IMO G8 guidelines with several others expected to be accepted during the next several years.

More over a decade ago, Hyde Marine, now a Calgon Carbon Corporation company, began having a solution to combat the spread of aquatic invasive species, initially within the Great Lakes, and in the end worldwide.

Teaming track of stakeholders including customers, regulators, scientists and government departments, Hyde pioneered the application 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 utilizing the same hardware, power consumption and flow because IMO-certified version with the PureBallast 3 family. Outside the United States, where PureBallast is type approved with all 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 incorporates a flexible construction according to four different UV reactor sizes. This allows for optimised sizing and competitive solutions more than a wide flow range. The current type approval covers flows of 150-3,000 m³/h based within the 300 and 1,000 m³/h reactor sizes, while type approval for systems determined by 170 and 600 m³/h reactors is predicted soon.

A benefit would be that the full spectrum of one's produced with the LED influences effective curing range with the fiber coatings. However, the narrow spectrum in the LED system also can create some challenges when curing fiber optic coatings which have been optimized with the broad spectrum of Hg lamps. It is therefore important to accomplish specific material testing while using LED systems and work closely while using fiber coating supplier to be sure the required physical properties in 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, contributing to costs and process downtime. Other consumable items range from the magnetron of UV microwave systems and reflectors which has to be regularly cleaned and replaced. This again ends up with manufacturing downtime and extra cost when it comes to parts and tech support.
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