NEI has been granted U.S. Coast Guard Alternate Management System status for the Venturi Oxygen Stripping system.  This USCG approval enables all customers to discharge VOS treated water while trading to the U.S.  The VOS system was granted approval for all water types, with no restrictions on water type, salinity levels, turbidity levels or temperatures.  VOS is also documented as the only system that does not require any retreatment whatsoever.  Systems with corrosive oxidizers such as chlorine or ozone must be neutralized prior to discharge. Systems using UV must be treated twice to comply.  VOS fully supports tank stripping and gravity discharge; two operational considerations not possible when re-treatment of the ballast water is required.




NEI commissions the world’s first dual use BWTS for BOTH treatment and cargo inerting

Through an extensive global network of sales representatives, partners, suppliers and service providers, N.E.I. manufactures, sells, distributes and services the VOS™ System to customers worldwide.

Global Reach


N.E.I. has developed, patented and commercialized the Venturi Oxygen Stripping™ (VOS™) System, a ballast water treatment solution which uses deoxygenation and cavitation to deliver safe, cost effective and reliable compliance to IMO and U.S. Ballast Water Discharge Standards.

VOS™ System


N.E.I. has installed or is currently in production with Venturi Oxygen StrippingTM (VOS) ballast water treatment systems (BWTS) for 27 large ships. N.E.I.’s BWTS install base included tankers, bulkers, and containerships with ballast water flow rates ranging from less than 500 to more than 6,000 cubic meter per hour.

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N.E.I. Treatment Systems is a pioneer and market leader in provisioning large commercial ships with Ballast Water Treatment Systems (BWTS). N.E.I.’s VOS system was the first in the world to receive IMO approval (Liberia, 2007). N.E.I. enables its customers to cost-effectively comply with U.S. discharge regulations now law and being enforced, and the pending IMO discharge regulations that protect the world's oceans and waterways from invasive aquatic plants and animals.

The United States has adopted in to law discharge standards for commercial vessels trading in its waters. The VOS system from NEI is approved by the U.S. Coast Guard under the Alternate Management System (AMS) program to treat ANY water type.  This approval includes all salinity levels, turbidity levels and temperatures-something very few suppliers can claim. To address the pending IMO discharge standards ratification, NEI has obtained more audited type approvals than any other company with five flag states (Liberia, The Marshall Islands, Panama, Malta and The Netherlands).  VOS treats all water types without the use of filtration, and without the need to re-treat or neutralize corrosive chemicals.

VOS™ Ballast Water Treatment Delivers
IMO Compliance AND A Compelling Return on Investment!

The VOS™ System induces a low oxygen environment within the ballast tanks which safely and cost-effectively eliminates harmful aquatic organisms without the use of active sub- stances. At the same time, this low oxygen, non-toxic environment also protects the ship's ballast tank coatings against degradation and corrosion of steel, thereby extending the useful life of ballast tanks to more than 35 years and delivering a BWTS return on investment.