METHOD AND APPARATUS FOR REMOVING CHROMATICITY FROM ORGANIC WASTEWATER

To provide a method and an apparatus for removing chromaticity from organic wastewater capable of efficiently removing chromaticity from organic wastewater in a shorter time with a smaller amount of chemicals.SOLUTION: The method for removing chromaticity from organic wastewater performs pre-treatment of organic wastewater with biological treatment S1, coagulation sedimentation treatment S2 in which a coagulant is added and coagulation sedimentation treatment is carried out under acidic conditions, and filtration treatment S3, in this order, followed by decolorization treatment S4 in which a decoloring agent is added to the organic wastewater after pre-treatment.SELECTED DRAWING: Figure 1 【課題】有機性排水中の色度を、より少ない薬液量で、より短時間で効率良く除去することが可能な有機性排水の色度除去方法及び色度除去装置を提供する。【解決手段】有機性排水に対し、生物処理Ｓ１と、凝集剤を加えて酸性域下で凝集沈殿処理を行う凝集沈殿処理Ｓ２と、ろ過処理Ｓ３と、をこの順で行う前処理を行い、前処理後の有機性排水に、脱色剤を加えて脱色処理Ｓ４を行うことを特徴とする有機性排水の色度除去方法である。【選択図】図１