Study of coagulant effect on shallow-bed (traveling-bridge) contact filtration for effluent reuse

摘要

In this study, a shallow-bed traveling-bridge (SBTB) filter was used as a contact filter, to investigate the effect of coagulant addition to the filtration efficiency. The filter bed was 25 cm deep, containing 0.55 mm quartz sand. 10-15 m~3/hr, secondary effluents were filtered at 3.5-5 m/hr. For different alum doses effective removal of particulates up to (70-80