A NOVEL APPROACH TO TREAT SAGO INDUSTRIAL WASTEWATER USING ANAEROBIC HYBRID REACTOR (AHR)

Anaerobic Hybrid Reactor (AHR) is one of the modern day high rate reactors which combine the benefits of suspended and attached growth biological process in a single reactor to treat domestic and industrial wastewater. In the present study, experimental investigations were carried out to treat the sago industrial wastewater using a lab scale Anaerobic Hybrid Reactor (AHR) of 4 liters capacity with 42 numbers (60% of reactor volume) of polypropylene inert media fill inside the reactor. The reactor was started with a low Organic Loading Rate (OLR) of 1 g of COD / L.d with Hydraulic Retention Time (HRT) of 10 days and operated for 160 days with sago industrial wastewater as substrate. At the end of the experimental study, it was found that the AHR treating the sago industrial wastewater had reached the OLR of 11.84 g COD/L. d with HRT of 0.65 days with the threshold COD removal efficiency of 80%. The data generated from the above study were used in the two popular mathematical models namely Grau second order and Modified Stover-Kincannon to predict the effluent substrate concentration from the reactor and found that these two mathematical models could be conveniently used for the design of large scale AHRs treating sago industrial wastewater.