In-mill waste handling

The aim of in-miU waste handling is usually to achieve as high a dry soHds content as possible, because all commonly used methods for material and energy recovery benefit from a high solids content. 

In a sludge suspension, water exists in the following forms  

Free water can be removed simply by gravity settling. Much of the water is removed by allowing the sludge to stand, when solids sink to the bottom and water forms a supernatant. Capillary water can be removed mechanically by filtration or centrifugation. Bound and intercellular water can be removed by drying. 

Filtrate drains by gravity as plows spread and turn sludge 

Sludge usally mixed with polymer enters here 

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