APPARATUS FOR RECLAIMING WASTE ACID, AND METHOD FOR TREATING WASTE ALKALI WATER USING THE RECLAIMED ACID

摘要

The present invention relates to alkali waste water treatment method using a regenerated acid from the spent acid and reproducing apparatus and which, more particularly, to play the exhaust spent acid the alkali waste water by washing the cold-rolled steel sheet in a cold rolling step was added to the regenerated acid alkali high-concentration waste water with a high concentration to properly maintain the concentration of the alkali waste water and while performing agitation addition of an inorganic coagulant with a by aggregation of the colloid particles contained in the alkaline waste water generated floc was treated spent acid and reproducing apparatus and reproducing therefrom to acid It relates to a process recipe.; Thus, according to the present invention, by reproducing the spent acid to achieve the turbidity, COD reduction can be treated by oxidation, aggregation and maintaining a constant alkali concentration of the high concentration of alkali waste water using the reproduction, and also practical that the waste water treatment costs are reduced there is on the effect.