all benefit from the use of this technology methods of the disclosure are readily apparent from reviewing the description of devices systems and examples methods include for example rotating one or more bowls with at least one filter element propelling influent outward during the rotation process propelling can be enhanced by for example use of pump vanes located within the inner most bowl rotational motion creates a pressure sufficient to force fluid through the filter elements and pushes solids over the top of the rim of the bowl one or more nested filtration elements can be used to achieve increasing filtration quality filter holes can be kept clean using a back flush system such as a spray nozzle and pump assembly a turbulent and laminar flow of liquid can be achieved across the face of the filter elements to afford a continuous cleaning effect on the face of the filters the laminar flow generally allows a series of liquid cylinders to flow in a direction where a center portion flows at a faster rate than an outer portion in contrast the turbulent flow vortices eddies and wakes make flow unpredictable some applications benefit from laminar flow while others are aided by introducing some small turbulence as defined by the composition of the influent the desired viscosity of the sludge and other characteristics of the particulates that tend to clog the filters only filtrate water is utilized to feed the back flush assembly the system is adapted and configured to produce an engineered turbulent and laminar flow of liquid across the face of the filter elements.