Treating agents for waste water containing dyes and/or other organic substances, a process for treating said waste water by using the same

Abstract

Abstract The present invention relates to novel treating agents for treating waste water containing dyes and/or other organic substances, a process for treating said waste water by using said treating agent, and an equipment for the same. The treating agent is prepared by mixing component A comprising a water-insoluble calcium salts and component B consisting mainly of aluminum hydroxide, aluminum oxide or a mixture thereof at a molar ratio of 3:1 to 1:3 and heating said mixture of components A and B as such or after granulation at a temperature between 100° C. and 450° C. The treating agent thus obtained has excellent adsorption and oxidative ability and is capable of easily clarifying waste water discharged from fiber processing plants that contains a variety of dyes and other organic substances, for example, sizing agents such as starch, polyvinyl alcohol and C.M.C., and surfactants, alone or in combination through one contact step, as opposed to conventional processes which require a number of steps using many kinds of treating agents. The present invention also involves a process and equipment for treating said waste water, in which said waste water is brought into contact with said treating agent packed in a column while introducing an inactive gas, such as air through the bottom of the column, wherein the gas inlet holes and liquid outlet holes are disposed in the funnel-shaped lower section of the column at an angle of 50 degrees or less, preferably 20 to 30 degrees, with respect to the wall of said funnel-shaped section, thereby allowing continuous operation over a prolonged period without any clogging inside the column.

Inventors

• 👤 Akio Sakotani
• 👤 Tohru Gomi

Bibliographic Details