The Effect of Biochar Particle Size on Biogas Production Using Bread Waste Substrate

The effect of biochar supplementation with different particle size on biogas production in two-stage anaerobic digestion white bread waste was carried out a laboratory scale using 100 mL bioreactor. variations sizes <63 µm, <125 <149 <250 and <500 µm the addition concentration 5 g/L, 15 25 g/L were investigated to obtain optimal concentrations. Mixed cultures incubated at 35 °C for 40 days. Daily gas production, pH Chemical Oxygen Demand (COD) measured daily water displacement method. results showed that < 500 increased by 60% resulted accumulation 4,240.03 mL/L. CH4, It has proven mixture. COD decreased from 9,670 mg/L 1,640 mg/L.