Hybrid Bioreactor is the combination of attached growth and suspended growth process. The Integrated Fixed Film Activated Sludge process is comprised of a fixed film media, free moving or stationary combined with activated sludge. By allowing the fixed film phase to retain biomass in the basin at low Solid Retention Time The aim of this study is to present the hybrid bioreactor technology as an alternative method to treat domestic wastewater under different conditions. This technology presents several operational advantages, compared to other conventional biological treatments. Processes will take account of Moving bed biological reactors and fixed bed reactor or packed bed biofilm reactor with some sort of modifications including change in media i.e. natural or artificial media, performance, baffle configuration and aeration system. Conditions which may be studied will include organic removal with primary treatments. This study can be helpful to check possibility that the hybrid process may be used as an ideal and efficient option for the organic removal from domestic wastewater.
