The screw screen TTF/C is a machine designed for screen, transport and dehydrate solids present in the urban waste water from septic tanks. This screen is mounted onto a stainless steel tank ready for connect directly to trucks using spherical connection and outlet pipe of DN100. Brushes fit on the screw allows self-cleaning on the compaction area. Through screw rotation, solids are transported to the compaction and discharging section. The spiral screw slides on replaceable wear bars to prevent the spiral-pipe friction. The compacting zone is composed of a circular mesh sieve.