Patent ID: 8535542

Claim:
A method of separating a mixture of liquid and insoluble solids in a filter press including a plurality of filter plates, said method comprising: pumping said mixture into a multiplicity of chambers to form a filter cake, each of said multiplicity of chambers being between adjacent filter plates of said plurality of filter plates, each of said multiplicity of chambers being lined by filter cloths, wherein, during said pumping, filtrate is forced through said filter cloths and out of said multiplicity of chambers; heating said filter cake in said multiplicity of chambers, wherein, during said heating, filtrate is forced through said filter cloths and out of said multiplicity of chambers; and releasing dried filter cake from said multi licit of chambers; wherein said heating is by radio frequency irradiation of said filter cake in said chambers and wherein said radio frequency irradiation is microwave irradiation from at least one microwave antenna embedded within said plurality of filter plates.