The Monster Wash Press (MWP) cleans and compacts the discharge from headworks screens, separating water and organics from the solids. It features a Muffin Monster grinder to precondition screenings before entering the MWP. The grinder breaks open rags, plastics and trash to promote washing and removal of soft organics. The patent-pending paddle rotor in the active wash zone agitates the material to enhance water penetration throughout the debris for even better removal of the organics from the solids. Organics are washed back into the wastewater treatment process and the solids are compacted into a dry, less odorous solid plug.