squeezed through the faces 31 to the interior of the rotor assemblies 30 appropriate holes 62 are provided in the rotor assemblies 30 for removal of the extracted liquids therefrom the liquid is then collected through a funnel like throat 65 to a collector pan 66 the collected liquids can be reused or disposed of as desired a hydraulic means 70 interconnects the free ends 24 of side structures 22 and serves to apply yeildable force to urge the side structures 22 toward one another hydraulic means 70 comprises a double acting hydraulic cylinder 71 appropriately connected by hinge pins 72 to side structures 22 by applying hydraulic fluid to one side of the piston in hydraulic cylinder 71 the side structures 22 and faces 31 are caused to move toward one another when hydraulic fluid is applied to the other side of the piston in cylinder 71 the side members 22 will move away from each other and increase the distance between faces 31 when the side members 22 move toward or away from one another they will pivot about pivot points 23 while the adjustment between the faces 31 to effect greater dewatering can be done by moving side members 22 toward or away from one another using hydraulic means 70 this has not proved entirely.