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The Computer Controlled Advanced Oxidation Unit, "POAC", designed by EDIBON, generates hydroxyl radicals (OH-) through ultraviolet light radiation with hydrogen peroxide. Raw water is enriched with hydrogen peroxide in a transparent tank and is driven by a computer controlled pump towards a reactor where an ultraviolet lamp with protective tube made of quartz is lodged. The reactor has a manifold at its lower part that allows the flow of raw water forming a rising film on the inner walls of the reactor. As it ascends, it receives ultraviolet light radiation, forming hydroxyl radicals, which oxidize non-biodegradable soluble substances from the water to be treated. The reactor is open by its lower side. Water flows towards the tank, forming a closed circuit. A flow sensor allows to measure the raw water flow rate through the circuit. This Computer Controlled Unit is supplied with the EDIBON Computer Control System (SCADA), and includes: The unit itself + a Control Interface Box + a Data Acquisition Board + Computer Control, Data Acquisition and Data Management Software Packages, for controlling the process and all parameters involved in the process.