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Close Close Contact Us Contact Us Ask an Expert Request Parts Quote Request Aeration System Quote Request MBBR System Quote US Sales Reps Canada Sales Reps SSI Worldwide Close Your Trusted Source For Wastewater Treatment Solutions Contact us today Fine Bubble Disc Diffusers Learn More Moving Bed Biofilm Reactor (MBBR) Learn More Technology Portal Learn More EC Diffusers Learn More Products Services Systems Technology Mbbr 7,000+ Installations 85+ Countries 300 million People Served 25 Years of Innovation What People Are Saying We have had the SSI Aeration AFC coarse cap diffusers installed in our two 450,000 gallon sludge holding basins for nearly five years and we have never had a problem with them. We also see adequate mixing and desired performance. The basins are inspected periodically and we have not had to replace any of the modules to date. Jerry Basham Operations Manager, City of Henderson KY Read More Testimonials What People Are Saying We were facing the possibility of having to build side stream treatment facilities to keep up with the demand-and this would have been extremely expensive. But because the SSI PTFE fine bubble diffuser is so effective, we didn’t need to do that project, and we’re handling more water than ever before. Gary Lagassey Operations Superintendent, City of Ft. Worth, Texas Read More Testimonials Latest Updates January 20, 2021 How Do Wastewater Treatment Plants Work? Wastewater treatment is vital for healthy communities and ecosystems. It provides clean, healthful water for industrial and municipal use, cuts down on disease transmission, and helps ensure a green, […] Read more December 2, 2020 Anoxic vs. Anaerobic vs. Aerobic Wastewater Treatment Wastewater treatment encompasses numerous treatment methods, each with its own procedures, advantages, equipment, and outcomes. Keeping track of the various techniques and using them in the appropriate applications is […] Read more What Is Tertiary Wastewater Treatment, and How Does It Work? In the wastewater industry, plants often focus on primary and secondary treatments, which do most of the work of preparing wastewater for discharge into the environment. Tertiary treatment is […] Read more How to Select the Right MBBR Media In secondary wastewater treatment, moving bed biofilm reactor (MBBR) media systems provide high-quality, low-cost, and low-maintenance solutions. With various media types to choose from, though, knowing the right MBBR […] Read more August 5, 2020 SSI MBBR Problem Solver – Dairy Dangers Dairy wastewaters are notoriously difficult to treat. At a close look, the truth is really in the chemistry. Every dairy application is different. No two plants use the exact […] Read more View all news ABOUT SSI OUR VISION Benefits Global Reach Corporate Social Responsibility ABOUT SSI 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. Learn More 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. Learn More Benefits Our years of leading-edge design and product development yield valuable savings and improvements for our clients: Our clients tell us that in their experience, SSI Aeration systems last longer and work better than other systems th...