Screen press is mainly used for dewatering and volume reduction of waste collected upon fine screens. The helezonic structure of the press carries the waste to the outlet as the mass and friction of the waste to apply pressure so that the excess water could be drained and reduce the overall volume leaving the waste dewatered. The drained water passes through the screen in the press and discharged from thereon. The solid waste could also be washed for odour control purposes. These presses could be manufactured from stainless steel.