METHOD AND APPARATUS FOR TREATING ORGANIC WASTEWATER

摘要

PURPOSE: A method and an apparatus for treating organic wastewater are provided to improve quality of water treated without increasing of facility cost and substantially reduce amount of excess sludge generated. CONSTITUTION: The method for treating organic wastewater, which is as a method for biologically treating the organic wastewater, comprises biologically treating the organic wastewater in a biological treatment equipment; solubilizing a part of sludge of the biological treatment equipment in a solubilization treatment equipment using thermophilie; and returning a solubilization treated solution to the biological treatment equipment after the solubilization. The apparatus for treating organic wastewater, which is as an apparatus for biologically treating the organic wastewater, comprises a biological treatment equipment(2) for biologically treating organic wastewater(A); a solubilization treatment equipment(7) for solubilizing organic solids using thermophilie; and a treated solution path which is connected from the biological treatment equipment to the solubilization treatment equipment and then to the biological treatment equipment again. The apparatus for treating organic wastewater, which is as an apparatus for biologically treating the organic wastewater, comprises a biological treatment equipment(2) for biologically treating organic wastewater(A); a solubilization treatment equipment(7) for solubilizing organic solids using thermophilie; a solid-liquid separator which is arranged on a path(3) of a treated solution following the biological treatment equipment(2) so as to separate the treated solution into treated water and sludge; a path(5) of the treated solution that is connected from the solid-liquid separator(4) to the biological treatment equipment; and a path(8) of the treated solution that is connected from the solid-liquid separator to the biological treatment equipment via the solubilization treatment equipment(7), wherein the apparatus further comprises a thickening equipment(9) installed on a path(6) of the treated solution that is connected from the solid-liquid separator to the solubilization treatment equipment.