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About SSI

SSI is a 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.


Our Story

We founded the company in 1995 in Poughkeepsie, New York.  It produced its first fine bubble diffusers in 1997. Since then, and for over 20 years, SSI has specialized in the rapid advancement of secondary biological wastewater treatment through R&D.  The results include patented of advanced fine bubble diffuser membrane materials, innovative product fabrication techniques, and innovative and simple interlocking parts.


Our Products

We understand that for wastewater applications, careful equipment design and material selection is critical for successful long-term operation. As an ISO 9001:2015 Quality Certified company, we prioritize quality.  We strive to produce state-of-the-art complete wastewater treatment plants and fine bubble and coarse bubble diffused aeration equipment. SSI designs all fine bubble diffusers, coarse bubble diffusers and MBBR’s to be cost-competitive. In addition, they should also be easy to install and provide the best efficiency and durability in the marketplace.


Our Vision

SSI’s vision is to be the premier supplier of diffused aeration systems, process integration, effluent treatment plants (ETP), and sewage treatment plants (STP) globally. Through all of our businesses, we project our common values.  These include Client Satisfaction, Product Quality, Integrity, and Sustainability. At SSI, we are proud to do our share, by providing excellent fine bubble diffusers and MBBR’s, to help clean the water around the world.


Our Scope of Work

SSI participates in all phases of a wastewater project, from diffused aeration and MBBR system design, manufacture, supply, installation to startup.

With diffused aeration equipment and complete MBBR’s installed on over 85 countries in 6 continents at thousands of job sites.  We have installed our aeration and wastewater products and systems in some of the largest cities in the world.  Having sold and installed millions of diffusers since the company was founded, SSI is a trusted source for wastewater treatment solutions.

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