Treatment of thin stillage in a high-rate anaerobic fluidized bed bioreactor (AFBR)

► Anaerobic treatment of thin stillage with TCOD of 130,000 mg/L and TSS of 50,000 mg/L. ► TCOD removal efficiency of >88% at OLR of 29 kg COD/m3 d. ► TSS removal efficiency of 78% at SLR of 10.5 kg s/m3 d. ► Biogas per reactor vol. & CH4 production rates of 15.8 Lgas/Lreactor d & 40 LCH4/Lthin stillage d. ► A very low overall system sludge yield of 0.0646 g VSS/g COD.