AER Supply, an international distributor of marine products, is featuring a cost-effective MEPC-compliant onboard sewage treatment system for the U.S. commercial marine market at the 2013 WorkBoat Show. AER was named earlier this year as the distributor for Severn Trent De Nora marine wastewater disinfection systems for the Gulf Coast and other regions of the United States. The Severn Trent De Nora MARINER OMNIPURE Series 55 marine sewage treatment systems are designed specifically to provide cost-effective treatment of gray and black water on small vessels, workboats and yachts. They use proprietary electrolytic disinfection technology that eliminates purchasing, storage and handling of hazardous chemicals normally required with other treatment technologies. They are approved by the U.S.