Sand trap for purifying waste water has inlet for waste water at right angles to separating tank and near its top, air jets along base of tank and trough for collecting sand along tank below these

摘要

Sand trap has an inlet (6) for waste water at right angles to a separating tank (1) and near its top. There are air jets (4) along the base of the tank and a trough (3) for collecting sand runs along the tank below these.