Abstract-The paper aims at studying the effect of activated carbon (AC) on pollutant removal and filtration performance of Hybrid Membrane Bioreactor (HMBR) were operated at hydraulic retention time of 24 h. under the textile wastewater treated by anaerobic digestion. AC addition led to TMP decrease for the rate of HMBR system to about twice the rate of the MBR system. The irreversible fouling of HMBR was 2 times lower than MBR system, where the decrease was mainly caused by the cake resistance reduction. In addition, foulant found in HMBR system was 9.12% lower than MBR system because AC can absorb foulant. The removal efficiencies of HMBR were higher than MBR system. The TKN removal of HMBR system is higher than MBR at 14.2%. This is due to the biofilm on AC surface which allows anoxic condition inside porous biofilm and enhances nitrite/nitrate removal efficiency.