Chapter Nine


Pentti Pirkonen1,  and B. Ekberg2     1Technical Research Centre of Finland (VTT), Jyväskylä, Finland     2Outotec Oyj, Finland, Turku, Finland


The use of ultrasonic (US) force field to aid both air- and liquid-based separation processes has gained an increasing recognition in recent years. The advantages expected from using US for separation processes include higher liquid removal rate, higher dry matter content in product, lower processing temperature, maintenance of product integrity, more selective product, and higher product recovery. In general, the passing of ultrasonic waves using suitable high intensity through air or liquid is accomplished by primary phenomena such as cavitation, radiation pressure, and ...

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