CO-DEGESTION OF FOOD WASTE AND DOMESTIC WASTEWATER BY USING UPFLOW ANAEROBIC SLUDGE BLANKET (UASB) COUPED WITH A MICROFILTRATION MEMBRANE (MF)

Abstract

This study investigated anaerobic co-digestion of food waste (FW) and domestic wastewater (DWW) by upflow anaerobic sludge blanket (UASB) combined with an external microfiltration membrane (MF) - AnMBR. The model was conducted with varying of hydraulic resident time of 72 h, 48 h, 36 h and 24 h in corresponding with varying of flux, respectively, were 47, 70, 94 and 141 L/m2.h. Removal efficiencies of TSS, tCOD, nitrogen and phosphorus were evaluated. The potential of biogas production also was determined. The results showed that removal efficiency of TSS and tCOD at above mentioned fluxes, respectively, reached 96.81 %, 97.04 %, 97.29 % and 98.08 % for TSS and 91.47 %, 89.31 %, 88.70 % and 87.0 % for COD. Also, the yield of biogas production was 0.083 L/gCODremoved, 0.085 L/gCODremoved, 0.105 L/gCODremoved and 0.103 L/gCODremoved, respectively, in corresponding with above mentioned fluxes. This study indicated that application of the lab-scale model of anaerobic membrane bioreactor for co-digestion the mixture of WF and DWW utilized the concentrated stream of membrane module to increase the biogas yield and to reduce amount of waste solid in landfill.