초록 ▼

A process for removing both color and odor from wastewater effluent that is contaminated from dye complexes, such as azo dye complexes, used for dyeing textiles to be various colors. The process requires treatment of the effluent with alkali metal permanganate, followed by treatment with hydrogen pe

A process for removing both color and odor from wastewater effluent that is contaminated from dye complexes, such as azo dye complexes, used for dyeing textiles to be various colors. The process requires treatment of the effluent with alkali metal permanganate, followed by treatment with hydrogen peroxide, followed by treatment a primary coagulant as a flocculation initiator (together with pH control so that the pH is basic), followed by treatment with a water soluble polymer, and followed by separating precipitated flocculated material from the effluent to obtain a clear effluent free of color and odor.

대표청구항 ▼

A process for removing color and odor from colored and odorous aqueous effluent containing color and odor from a textile dye, said process comprising the following steps: (A) treating the aqueous effluent with an alkali metal permanganate in an amount sufficient to provide for a pink color to remain

A process for removing color and odor from colored and odorous aqueous effluent containing color and odor from a textile dye, said process comprising the following steps: (A) treating the aqueous effluent with an alkali metal permanganate in an amount sufficient to provide for a pink color to remain in the effluent; (B) treating the resultant from step (A) with hydrogen peroxide in an amount sufficient to provide for the pink color to disappear from the liquid portion of the effluent and to observe very fine solid particles suspended throughout the effluent; (C) treating the resultant from step (B) with a primary coagulant as a flocculation initiator in an amount sufficient to provide for well defined small flocculent particles to be precipitated, with a clear, colorless liquid above, and including a pH adjusting agent to adjust the pH to be basic from above about 7.0 up to about 9.0; (D) treating the resultant from step (C) with a water soluble polymer in an amount sufficient to provide for large, flocculated particles to be precipitated, with a clear, colorless, and odorless liquid above; and (E) separating the large, precipitated flocculated particles from the effluent to obtain a clear aqueous effluent free of color and odor.