Wastewater concentrator with slotted distributor

There is disclosed herein apparatus for screening combined liquids-solids such as wastewater. Exemplary equipment includes a substantially cylindrical screening structure which is mounted for rotation and a slotted distributor disposed therein. Influent is piped into the distributor and flows through slots in the peripherial wall thereof toward the inner surface of the screening structure. The flow of influent from the distributor onto the screening structure causes the screening structure to rotate, and the influent is screened thereby.