Millions of stone washed jeans are manufactured each year and Hydrocyclones are part of the process. The jeans are washed with pumice, which has to be removed from the effluent in order to meet mandatory requirements for the quantity and nature of the solids that can be discharged to drain.
Slurry is pumped to the Hydrocyclones where the solids are removed to a thickened underflow product which is
simple to dispose of. The effluent discharge constraints are not compromised by the small quantity of very fine pumice solids which remain in the cyclone overflow.