Gravity thickeners

Sludge thickening is a preliminary treatment of sludge, the simplest and most widely used method to reduce its volume. Thickening increases the dry substance concentration of the sludge and removes sludge water, thereby reducing moisture. Thickening is required for sludge resulting from aeration tanks or biological filters, as they have low dry substance concentration, and thickening enhances the efficiency of the subsequent dewatering process.