A new advanced UV ballast water management technology that provides effective treatment and unique operational advantages for vessels.
The Purestream™ ballast water management system, developed to meet the IMO D-2 and the USCG Ballast Water Discharge standards, combines Atlantium’s proven UV solution with filtration, enabling the maximum flexibility to ship owners, while assuring compliance with the strictest inspection process by port authorities.
Purestream™ Science of Compliance
The Purestream system is a non-chemical, environmentally friendly solution based on a revolutionary 20-micron screen filter and a medium pressure UV system. Atlantium’s strong technical knowledge for overcoming the worst water condition and resistivity of target organisms were the basis of the UV system design. The UV system uses proprietary comprehensive real-time monitoring of critical parameters to automatically and efficiently maintain the minimum UV dose required to meet application-specific needs. Purestream also features an extensive control mechanism that assures operators and authorities about the unit’s functionality.
Purestream system is validated to operate at minimum retention times (≤ 24 hours) following treatment under difficult water conditions with UV transmittance as low as 40% UVT.
Purestream ballast water management systems are designed to treat 100 – 1,500m
3/h of fresh, brackish, or seawater. Purestream is delivered as loose modules to ensure flexibility and ease of installation in space-constrained engine rooms. Alternatively, a container-based deckhouse solution (skid arrangement) is available. Zone 1 approval is underway.
Purestream™ Shipboard Installation
Robust Construction — an austenitic stainless steel designed
for maximum resistance to pitting and crevice corrosion.
Self-Cleaning Filtering Process — seawater flows through the
filter. The gradual dirt buildup on the inner screens surface
causes an increase of the differential pressure across the
filter. The self-cleaning process begins when the pressure
differential reaches a pre-set value. Features automatic,
uninterrupted focused flushing that cleans out 100% of the
screen area, while using less than 10% of the total processed
Suction Scanning Solution — a special mechanism offering
automatic, uninterrupted focused flushing that cleans out
100% of the screen area, while using less than 10% of the
total processed water.
During ballasting, the water flows through a 20-micron screen filter to remove organisms and particles. The filter features an enhanced backwash and self-cleaning mechanism for ease of operation and use.
The ballast water then flows through the Purestream UV system to kill and inactivate organisms and bacteria and meet IMO and USCG Type Approval.
For the IMO, the Purestream technology has demonstrated a mode of operation that enables one-pass treatment (Purestream™ One-Pass™). As a result, operation of the Purestream system is only required during ballasting and there are no requirements for water treatment during de-ballasting. This unique attribute reduces the overall power consumption by 50% when compared to traditional UV systems while doubling the unit’s reliability.
- Enables discharge of wing tanks direct by gravity.
During de-ballasting, the filter is automatically bypassed and ballast water flows through the Purestream system for a second-pass treatment before discharge. With Purestream™ Go™ there are no holding time limitations for de-ballasting. For the IMO, Purestream™ One-Pass™ mode processing is used for de-ballasting.