treatability of a fiberboard unit effluent

a pilot anaerobic filter was used to remove cod from babolsar fiberboard production wastewater. the anaerobic filter was packed with ceramic packings and operated at different organic loading rates of 2.4 and 8 kg cod/m3 /day, in 20, 10 and 5 days hydraulic retention time (hrti), respectively. the reactor achieved cod removal of 80.3%, 81% and 79% for hrt 20, 10 and 5 days, respectively. in addition bod and oil removal efficiencies were shown to be 80% and 60%, respectively. the results of this study suggest that using anaerobic filter is a reliable process for removal of cod from fiberboard manufacturing effluent.