IFAS blends the process flexibility and advanced treatment benefits of Activated sludge with the inherent stability and ease of operation of attached growth film systems, increasing capacity and /or level of treatment adding attached growth media to a suspended growth reactor provides additional stabilized biomass for anoxic zones for kinetic optimization resulting in less tankage. .

IFAS technology is the first process specifically designed for ideal operation in municipal wastewater treatment/activated sludge processes. IFAS upgrades offer an extremely cost-effective retrofit solution to municipal wastewater plant expansion, taking full advantage of existing systems, equipment, process knowledge, training, and operator skills. The technology is compatible with plug flow and complete mix configurations.

IFAS process benefits includes short payback period investment, significant performance enhancement, IFAS achieves increased process stability under conditions of variable mixed liquor, solids retention, and organic loading rates, intuitive process operation and reduced clarifier loading.