Severn Trent De Nora Introduces the OMNIPURE(TM) Series 55 System to Meet Stringent Effluent Standards Taking Effect in January 2010

FORT WASHINGTON, Pa. - March 19, 2009 - Severn Trent De Nora has introduced the new OMNIPURE(TM) Series 55 marine sanitation system, designed, manufactured and tested to comply with MEPC.159(55) effluent standards and performance tests for sewage treatment plants across a variety of offshore and marine installations. The MEPC.159(55) effluent standards, adopted by the International Maritime Organization's Marine Environment Protection Committee, apply to all sewage treatment systems installed on board on or after January 1, 2010.

The OMNIPURE Series 55 systems range in capacity from 781 to 15,842 gal/day as individual units that can also be combined for increased capacity. The systems provide effective electrolytic treatment of both black and gray water through a patented and certified treatment process. Like other OMNIPURE products, the Series 55 systems produce a sodium hypochlorite disinfection solution from seawater in the presence of sewage to effectively treat all sewage.

Electrolytic treatment of marine sewage eliminates chemical storage issues, dosing equipment and costs associated with the use of hazardous chemicals since the disinfection solution is produced on site while the unit is in operation.

The OMNIPURE Series 55 systems require minimal operator supervision and maintenance compared to other treatment technologies. These traits, combined with their small footprint and the light weight, make the systems the preferred long term solution for wastewater treatment for a variety of installations, including deeper-water, weight-sensitive applications.

The new OMNIPURE Series 55 system will be formally introduced at the Offshore Technology Conference, (May 4-7, 2009 at Reliant Park, Houston, Texas) at Severn Trent De Nora's booth 5423.

About Severn Trent De Nora, LLC

Severn Trent De Nora, LLC ( is a joint venture offering a solid foundation to support marine and offshore industrial water disinfection needs by drawing upon the strength and global resources of Severn Trent Services, Fort Washington, Pa. ( and Gruppo De Nora, Milan, Italy ( Severn Trent De Nora offers the benefits of enhanced technical solutions and a greater range of services by combining the seawater disinfection capabilities of both companies. Severn Trent De Nora offers products to serve marine waste water treatment applications and the seawater disinfection needs for the following applications: power generation, desalination facilities, coastal industry, offshore oil and gas facilities, general marine, cruise vessel industry and navies worldwide.

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