Sludge thickening and dewatering unit

1 Sludge thickening and dewatering unit

EKOsludge PRESS1

Screw press main characteristics:

Application:

• Unit is used for the purposes of sludge thickening and dewatering in either municipal waste water treatment plants, or in industrial plants.
• Due to the specific construction, sludge thickening and dewatering unit can treat sludge directly from the biological tanks or from secondary settling tanks (DS content of 0.2-5%) without the need for construction of a separate thickener

Short description:

• Sludge thickening and dewatering unit is manufactured as a pre-mounted plant which among other consist of multi plate screw press, sludge feed pump, automatic polymer preparation unit, dosing pump, electric control cabinet and, if necessary, sludge transportation and hygienisation system.
• The central part of the sludge thickening and dewatering unit is multi plate screw presses as shown in the figure below.

Operation principle:

• Sludge is transported to the multi-plate screw press by means of a sludge feed pump. At the same time, from polymer preparation unit dosing pump is transporting prepared polymer solution into the press.
• After treatment in the preparation tank, sludge travels through the press to discharge of sludge cake under the influence of force that the device produces.
• While the gap between the helical axis blades gradually gets narrower and narrower, the sludge is under heavier and heavier pressure. The water gradually comes out form the sludge as a result of differential pressure via the filtering gap between the fixed plates and the moving plates.
• Due to a self cleaning function of the fixed plates and the moving plates, the clogging problem is avoided.
• The sludge is pushed by helical axis after being fully dewatered and then discharged to the outlet.