TREATMENT OF HIGH CONCENTRATION ORGANIC WASTE WATER

摘要

PURPOSE:To stably treat waste water in a low cost by oxidizing high concn. org. waste water in a wet catalytic oxidizing tower and filtering the liquid subjected to oxidative treatment in a filter tower using the exhaust gas from the wet catalytic oxidation tower as washing gas. CONSTITUTION:A biological filtered raw solution is introduced into a biological filter tower from an inflow pipe 19 to be passed through a granular medium bed kept aerobic along with the air from an air diffusion pipe as an ascending current. At this time, the biological filtered raw solution is subjected to not only aerobic microbiological treatment by the bacteria membranes bonded to the surfaces of granular media but also filtering action and the obtained treated water of high quality is taken out of a discharge pipe 20. Further, a biological denitrification tower 8 or the biological filter tower 9 are periodically washed but, as the washing gas thereof, the exhaust gas discharged from a wet catalyst oxidation tower 4 and separated in a gas-liquid separation tank 6 is utilized.