The proposed system features sludge dewatering and flocculation system. It consists of Poly preparation tank, ‘poly-sludge ’mixing tank which is also called as flocculator/ static Mixer, poly dosing pump and Teknobag draimad sludge dewatering equipment.

First Polyelectrolyte solution is prepared by mixing polyelectrolyte (powder form) with water in poly preparation tank to get a solution of 0.1% concentration and then it is pumped through poly dosing pump to flocculator/ static Mixer. Sludge from the sludge settling tank (exclusion of scope) of capacity 1 to 4m/3hr, with facility for flow adjustment.

In flocculator/static Mixer the sludge and the poly is mixed continuously in about two minutes of residence time, to achieve formation of big and strong flocks.

The flocculated sludge is fed to Teknobag Draimad Dewatering unit by gravity continuously. The feeding is stopped manually once the bag are filled with sludge in approximately 2 to 3 hrs and kept standing for another 4 to 5 hrs for draining of any further free water. The time cycles depends entirely on the quality of sludge and quality of flocculation.

Filtrate generated is collected in the bottom tray of teknobag draimad and let out from bottom of the unit through outlet nozzle, for further disposal.

Sludge collected in bags has to be removed manually, first the mouth of the bag is tied using the tie wires and wire twister provided and then removed using the trolley provided, stacked/ stored at suitable location for approximately 10 to 15 days for further dewatering through natural evaporation.

After that the dried out sludge is removed from the bag and is sent for further disposal. Bags can be washed and reused for dewatering of sludge.

New bags are installed and the unit restarted for dewatering of the next batch of sludge.