The recessed-plate filter press from McLanahan treats thickener or clarifier underflow or other waste materials, dewatering very fine solids from wash water or industrial processes. Slurry is pressure-pumped into recessed chambers wrapped in filter cloth. The resulting solids form dry, easy-to-handle cakes that discharge from the press bottom. Water is recycled back to the process for reuse. Units typically require no added polymers or chemicals after the thickener. No full-time operator is required, as units can be monitored remotely. 814/695-9807; www.mclanahan.com.