Integrated fixed film activated sludge IFAS process involves adding an attached growth media to an activated sludge tank to facilitate biomass growth & strengthen the wastewater treatment process
IFAS Process - Hybrid Process - Levapor
Conventionally with free floating attached growth process, MBBR (Moving Bed Bio Reactor) configuration is a popular choice. In MBBR no sludge recycle is practiced and all removal is obtained via biomass attached on the media only.
However, over the past few decades, IFAS process in which apart from free floating media, MLSS is also maintained in the suspended phase using RAS just like conventional activated sludge process. In fact IFAS process with textile sheets, cord media and other fixed in place media has been around the scene quite for a long time and has been successfully implemented for upgradation of existing overloaded activated sludge processes.
