Method of treatment of coke wastewater

摘要

A method for treatment of coke wastewater, including (1) introducing wastewater into a regulating reservoir into which an acid liquor is added until the pH value of the wastewater ranges between about 5.5 and about 6.5; (2) introducing the wastewater into a three-dimensional electrode treatment device for electrolysis treatment; and (3) introducing the wastewater into a coagulation reaction tank into which an alkali liquor is added until the pH value of the wastewater ranges between 8 and 10, and as a coagulant polysilicate ferric magnesium is added into the wastewater for a hybrid reaction of between 5 and 15 mins; allowing the wastewater to flow into a sedimentation basin for plain sedimentation of between 4 and 6 hrs; and extracting a supernatant liquor to yield a processed effluent.

主权项

1. A method for treating wastewater, the wastewater comprising non-degradable organics, the method comprising the following steps:
(1) introducing the wastewater into a regulating reservoir and adding an acid into the regulating reservoir until the pH value of the wastewater ranges from 5.5 to 6.5; (2) introducing the wastewater treated in the step (1) into an electrode treatment device for electrolysis treatment, an electric current density therein ranging from 30 A/m2 to 150 A/m2 and electrolysis time ranging from 10 to 50 mins, wherein the electrode treatment device comprises a fluidized bed electrode comprising a reactor pole plate and a filler particle electrode, the reactor pole plate comprises an anode and a cathode, and the anode comprises stainless steel; and (3) introducing the wastewater treated in the step (2) into a coagulation reaction tank, adding an alkali into the coagulation reaction tank until the pH value of the wastewater ranges from 8 to 10, and adding polysilicate ferric magnesium into the wastewater for a hybrid reaction for 5-15 mins; allowing the wastewater to flow into a sedimentation basin for plain sedimentation for 4-6 hours; and extracting a supernatant from the wastewater.