SSI is global leader in the design and manufacture of wastewater treatment plant equipment. This includes innovative, robust, and energy efficient engineered membrane diffusers. These include fine bubble diffusers, coarse bubble diffusers, and aeration systems. Our wastewater process division specializes in the moving bed biofilm reactor (MBBR) and integrated fixed-film activated sludge (IFAS) processes. We focus on solutions for both industrial wastewater treatment plants and sewage treatment plants.