Sand Drying Bed Design Calculation

operation of unplanted drying beds. be able to design an unplanted drying bed to achieve the desired treatment objectives.7.1 introduction unplanted sludge drying beds are shallow lters lled with sand and gravel with an under-drain at the bottom to collect leachate.Sludge is discharged onto the surface for dewatering (figure 7.1).The.