Hybrid Biological Reactor for Wastewater Treatment

Wastewater treatment using activated sludge processes has been widely practiced, mainly because of their high treatment efficiency and low operating cost . In the past few years, many efforts have been made to improve and enhance the efficiency of conventional biological wastewater treatment processes coupled with trials to reduce reactor volume and land area requirements. The integrated fixed-film activated sludge (IFAS) system is a variation of the activated sludge process in which biomass support materials or media are incorporated into suspended growth bioreactors. Therefore, pilot plant experimental program has been conducted in Zenien waste water treatment plant aiming at verifying the enhanced efficiency of adding attached biomass inside the aeration tank. The results indicated that COD removal values reached 85.17%, 84.97% and 80.83% at a hydraulic retention time of 6, 4, and 2 hours. Corresponding BOD removal values reached 88.52%, 88.32% and 86.94%at a hydraulic retention time of 6, 4, and 2 hours. Corresponding TSS removal values reached 85.48%, 85.28% and 83.89% at a hydraulic retention time 6, 4, and 2 hours. The results proved that the system could accommodate the increasing of organic loading rate and was efficient for removal of COD, BOD and TSS