| 摘要 |
PROBLEM TO BE SOLVED: To obtain a treating method and a treating agent of cyanogen-containing wastewater by which flocculation effect of insoluble cyanide salts produced by a reaction can be improved and a cyanogen removal rate by flocculation separation can be improved to attain high cyanogen removal rate and by which addition amount of a flocculant can be reduced and sludge generation amount of copper origin can be also reduced.SOLUTION: Cyanogen-containing wastewater is introduced from L1 into a reaction tank 1, a reducing agent is supplied from L2, a treating agent including a copper compound and a magnesium compound is supplied from L3, a pH adjuster is supplied from L4 to cause a reaction, an inorganic flocculant is supplied from L7 in a flocculation tank 2, the pH adjuster is supplied from L8 to cause flocculation, an organic polymer flocculant is supplied from L10 to form flocks, sedimentation of the flocks is carried out in a sedimentation tank 3 and filtration separation of remaining minute deposits is carried out in a filtration separation tank 4. |
