Sullage oxidized coagulated decolorizing process technique

Abstract

The present invention relates to a sewage oxidation coagulation decolorizing treatment technics. The sewage firstly enters an oxidation decoloring section. Added in An oxidant, the sewage enters a mixed coagulation reactor after the oxidation reaction lasting for 1 to 180 minutes; a coagulant PAC is added in the mixed coagulation reactor and after the fully mixed coagulation reacting, a flocculating agent PAM is added in; after fully reacting, the sewage enters a solid-liquor separator and the clear solution after separating solid from liquor is discharged through the solid-liquor separator. The oxidant is an oxidant of sodium hypochlorite, or calcium hypochlorite or peroxide or any combination of the three; the quantities added to are respectively that the sodium hypochlorite and the calcium hypochlorite are respectively 50 to 20000 PPM, and the peroxide is 0 to 10000 PPM. The quantities of the added coagulant PAC and the flocculating agent PAM are respectively that the PAC is 0 to 2000PPM and the PAM is 0 to 20 PPM. The present invention has the advantages of good treatment effect, innocuity of reaction products, no need of secondary treatment and good operation performance. The present invention has a quicker reaction speed under a normal temperature and is convenient to match and join with the front and back treatment technics.

Description

Technical field [0001] The invention relates to a sewage treatment process, in particular to a sewage oxidation coagulation decolorization treatment process. Background technique [0002] The currently used sewage decolorization coagulation treatment system generally adopts the addition of PAC and PAM in the coagulation reaction tank, and the reaction enters the sedimentation tank to separate the mud and water. However, due to its unreasonable technology, there are some defects that cannot be ignored in practical applications. First, because only PAC PAM is added to the reaction tank, the oxidation capacity is insufficient, and the decolorization effect is poor; second, because only PAC PAM is added to the reaction tank, the oxidation capacity is insufficient, and the COD removal effect of sewage is not ideal; third, because Only adding PAC PAM to the reaction tank has insufficient oxidizing capacity. In order to improve the treatment efficiency, the dosage is greatly increased a...

AI Technical Summary

Problems solved by technology

However, due to its unreasonable process, there are some defects that cannot be ignored in practical applications.

First, due to only adding PAC PAM in the reaction tank, the oxidation ability is insufficient, and the decolorization effect is poor; second, because only PAC PAM is added in the reaction tank, the oxidation ability is insufficient, and the sewage COD removal effect is not ideal; third, due to Only add PAC PAM in the reaction tank, the oxidation capacity is insufficient, in order to improve the treatment efficiency, the amount of dosing is greatly increased, resulting in too high unit treatment cost

Fourth, due to the unreasonable selection of oxidant, the unit treatment operation cost is too high and the treatment efficiency is too poor