The invention is a flow-through flow-through filter that can separate raw water and/or sewage to filtered stream, fine particle stream and grit stream in one hydraulic device. For raw lake and/or canal water intake application, the flow-through filter is placed inside a chamber box that is mounted on a water intake rack structure or diversion canal. The invention filters debris and organisms to prevent biomes formation in pumps and waterlines that delivers raw water to a water treatment plant. The flow-through filter withdraws flows from a raw water body without taking defined sediment, floating debris and target aquatic biomes and eliminates the need of discharging remnants to a sewage system. For wastewater treatment, the flow-through filter is installed over a wet well after the headwork rack and may replace the grit removal, primary clarifier, and the fine screening. The flow-through filter requires a much smaller footprint of the area and/or enclosed building that requires smaller odor control. There is a substantial cost saving of using one device and replaces grit removal, primary basin, and fine screening.

A liquid solid separator has a main container wherein a rotating filter belt receives influent for liquid sold mixture sieve processing. Various recirculation systems are proposed including an external pump sump, internal pump recirculation and dual pumps with one disposed externally in a sump and one internally in the lower basin of the container. Recirculation points include an inflow pipe connection, an influent basin connection located above the influent basin and influent basin connection located underneath the liquid solid mixture influent level.