This study evaluates the performance of Hybrid Up-Flow Anaerobic Sludge Fixed Film (HUASFF) reactor for treating sago wastewater. A laboratory scale HUASFF reactor having a volume of 30 litres was operated with Organic Loading Rate (OLR) of 0.55 kg COD/m3/d. Several effluent characteristics such as pH, COD, TSS, VFA and biogas production were studied until steady state was reached. The pH of the feed in the reactor was comparatively stable which are well suited for methanogenic activities. The results revealed that variation of effluent pH (from 7.45 to 8.47 ) during the operation with respect to organic loading rate varied from 0.8723 to 4.2011 Kg COD/m3.day with respect to following hydraulic retention time 4, 3, 2, 1.75 and 1.5 days.