METHOD AND DEVICE FOR PURIFYING WATER

摘要

PURPOSE:To provide a novel device capable of removing COD by ozone more efficiently than before. CONSTITUTION:A tank 2 is divided by plural partition walls 3 to serially form >=2 sets of the ozone treating part and granular filter medium-packed bed in this order. The water to be treated is vertically passed through the ozone treating part and packed bed, and the ozone treatment and the biological treatment by the granular filter medium are repeated more than twice.