The belt filter press is composed of two units, the pre-thickener and the sludge press. The pre-thickener performs the initial solid/liquid separation stage, taking sludge solids concentration from 0,5-3% up to 5-15 %.
The dewatering in the press occurs firstly in the low pressure zone, then in the wedge zone and finally in the high pressure zone where the filter cake is compressed between the perforated cylinder cloth and the main cloth. The discharged sludge cake can reach dry solid contents variable from of 18 to 30% depending on the sewage sludge.
The beltpress can be used for mixed fiber, biological, chemical sludge.  

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