Iqbal, MuhammadAhmad AdriantoHS Irdoni2013-02-092013-02-092013-02-09nurasmihttp://repository.unri.ac.id:80/handle/123456789/2015Increased production of sago starch production increases causing waste in the form of solid waste and liquid waste. Sago starch processing waste liquid 94% -97% and directly channeled into the waters surrounding the treatment process. Sago effluent average yield of dissolved organic compounds, solids and waste acidic concentration through the standard. Solids is one of the parameters to measure water pollution. The concentration of dissolved solids sago factory effluent was 3.76 g/L, while the concentration of the raw quality is 0.1 g/L. This study aims to reduce the solids content in the effluent using sago starch factory wastewater as substrate performed anaerobically using anaerobic hybrid bioreactor mediated by stones. Hybrid anaerobic bioreactor is a combination between the suspended growth and attached growth system using a stone as a medium of cell immobilization. Working volume was 10 L reactor with a variation of the feed flow rate is 2.5 L/day, 3.3 L/day, 5L/day and 10 L/day. Parameters observed in this research is TS, TSS, TVS and VSS were analyzed by gravimetric methods. The results of this study indicate that the efficiency of TSS at a flow rate of 2.5 L / day is 46.87%, 3.3 L /day is 62.49%, 5 L/day is 59.04% and 10 L /day is 44.89%. Optimum flow rate for the provision of wastewater solids sago plant is the flow rate 5 L/hr. These results indicate that the hybrid anaerobic bioreactor mediated by stones can reduce the solids content of sago wastewater plant but did not reach the quality standards specified value.otheranaerobic processhybrid anaerobic bioreactorsago wastewatersolid allowancestudent Paper Post Degree