Eco-Tec, model AP1624. Input streams - partially spent acid: sulfuric (90% recovery), nitric (80-85% recovery), phosphonic (70-75% recovery), water. Output streams - spent acid stream, purified acid stream. Unit will process 1500-2000 liters per day. Unit has 12" diameter x 32" tall acid and water feed tanks on board, 16" diameter x 24" tall resin bead, 5 minute cycle (2.5 minute each). Built in 1995