A method for treating an effluent containing sorbic acid and/or a salt thereof and an effluent disposal device

摘要

An effluent containing sorbic acid or its salt from, for example, a sorbic acid production line is (1) treated with a hypohalogenous acid or its salt, e.g. sodium hypochlorite, or (2) subjected to membrane separation or activated carbon treatment and further to biological treatment such as activated sludge treatment. The required amount of the hypohalogenous acid or salt may for example be about 0.01∼10 parts by weight, in terms of effective halogen, based on 100 parts by weight of the effluent. Optionally the effluent thus treated with the hypohalogenous acid or salt is further subjected to a biological treatment such as an activated sludge process.