TREATMENT OF HIGH CONCENTRATION ORGANIC WASTE WATER

摘要

PURPOSE:To stably treat high concn. org. matter in low cost by treating a nitrate ion formed by the wet catalytic oxidation of high concn. org. waste water in a fixed bed type biological denitrification tower and removing a residual COD component by biological filtration. CONSTITUTION:The high concn. org. waste water subjected to fine grinding treatment in a grinding process 1 is supplied to a heat exchanger 2 through piping 12 and subsequently supplied to a wet catalytic oxidation tower 14 through piping 13, a solubilizing tower 3 and piping 14. The waste water is subjected to oxidation treatment in the presence of a catalyst in the wet catalytic oxidation tower 4 and the treated water and treated gas from the tower 4 are taken out from piping 15 to be cooled to about room temp. by the heat exchanger 2 and supplied to a solid-liquid separation tank 5 and the separated liquid herein is introduced into a fixed bed type biological denitrification tower 6 packed with a filter material to be subjected to denitrification treatment. The treated liquid in the biological denitrification tower 6 is transferred to a biological filter tower 7 from piping 18 and subjected to biological filtration to decompose and remove residual low MW org. acids.