Notice of RetractionAdvanced Treatment of Composite Coagulant to A/O Bio-Reactor Effluent from Coking Wastewater

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Coagulation process using composite flocculant (PAC and organic polymer coagulant) was employed as advanced treatment method for biochemical effluent from coking wastewater in this paper. Factors such as solution pH and composite flocculant dosage were tested. Results showed that the optimal dosage of PAC was 400 mg/L, but the optimal dosage would change to 300 mg/L when add to the polymer flocculant, so the composite flocculant not only can reduce the dosage of pure PAC but also can increase the turbidity and chroma removal rates. In the optimal dosage condition, turbidity and chroma removal rate can reach 96.67% and 72.60% respectively. In the pH value range of 2~10, turbidity removal rate was the best when pH value was 8 and the chroma removal rate was the best when pH value was 4. Composite flocculant is superior to the apply the advanced treatment of wastewater.