Solution for treatment of sludge produced in ceramic industry

Hallo everybody,

I am looking for effective solutions and equipment available for treatment of sludge produced in industrial wastewater treatment plant in ceramic factory.

Wastewater is generated in production of elements and also in glazing operation . Produced sludge consists mainly mineral stuff (clay and kaolin).  Currently sludge is dewatered in drum filters with result of average 65% of dry solid content recovery. The goal is to obtain 85-90% dry solid recovery. I will be grateful for any information provided about treating this kind of sludge. 

Thank you in advance