A screen cylinder includes a cylindrical screening media having an inflow side and an outflow side. The screening media is formed of a plurality of circumferentially spaced and axially extending wedgewire bars, which have an inflow surface facing the inflow side. The axially extending wedgewire bars have a wear resistant coating on their inflow surface. The wear resistant coating is substantially uniform in thickness on the inflow surface at individual axial locations but thicker on the bars on the inflow surface towards the outflow end of the screening media compared to the wear resistant coating located on the bars towards the inflow end of the screening media.

A separating grid includes a separating unit arranged, when in use, in a position of inclination obliquely upwards in the direction of flow of running water, fixed grid bars, movable grid bars, and a drive unit connected to the movable grid bars to actuate the movable grid bars to interact with the solid particles and to draw the solid particles out of the running water and to carry the solid particles upwards along the fixed grid bars. A position detection device detects the top position or the bottom position of the movable grid bars. A water level detection device detects the water level of the running water. A control device controls the drive unit according to information from the position detection device regarding the position of the movable grid bars and information from the water level detection device regarding the water level.

The invention relates to a filtering apparatus for filtering a fluid, in particular a Bernoulli filtering apparatus, comprising a housing, an inlet port for admitting the fluid to be filtered into the housing, at least one filter element, disposed in the housing, for filtering the fluid, an outlet port for discharging the filtered fluid from the housing, and a filter cleaning mechanism for cleaning the filter element of residues from the filtered fluid, wherein a pressure maintenance unit for maintaining a defined minimum pressure in the housing during cleaning is associated with the outlet port for the filtered fluid on the housing.

Systems and methods for separating components of a mixture are provided. The systems can include at least one section that defines a tortured path configured to provide some components in one direction along the section and other components in another direction along the section. Methods can provide for the separation of bubbles within a liquid matrix, liquid separation, liquid/solid separation, and/or solids separation.