In the paper manufacturing process, the filter and press water is extracted from the fibrous water suspension in the paper machine. There are various levels of retention which depend on the type of paper being manufactured and the composition of the suspension. The retention indicates the proportion of the fibrous filling substances left in the filter compared to the complete retention of the substances in the waste water.
In the manufacture of hygienic tissues, such as toilet paper, tissues or facial tissues, a lot of fibrous substances remain in the water from filtering and pressing the fibrous water suspension.
This water is treated in the in-house waste water facility. The solids are concentrated before being removed from the water in a filter belt press. To transfer the water with all the solids into the filter press, a Boerger Rotary Lobe Pump is used at the paper factory in West Germany.
|Börger||Rotary Lobe Pump|
|Solid content||3 - 8% DS|
|Rated capacity||40 - 100 m³/h (176 - 440 usgpm/h)|
|Speed||80 - 230 rpm|