Notice of RetractionLaboratory test for in-depth treatment of leachate by calcium hypochlorite composite chemicals

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.

In this work, in-depth processing of leachate after biochemical treatment was performed using calcium hypochlorite solution + aluminum sulfate solution and calcium hypochlorite solution + poly-ferric sulfate solution, respectively, to determine the optimal condition for removal of CODcr and colority. It was found that the optimal condition was: calcium hypochlorite dosage 20 mL/L, aluminum sulfate dosage 7.5 mL/L, reaction time 5-minute high speed mixing followed by 20-minute low speed mixing for processing with calcium hypochlorite solution and aluminum sulfate solution, and calcium hypochlorite dosage 15 mL/L, aluminum sulfate dosage 25 mL/L, reaction time 5-minute high speed mixing followed by 25-minute low speed mixing for processing with calcium hypochlorite solution and poly-ferric sulfate solution. The effluent quality met requirements of the tertiary standard described in “Integrated wastewater discharge standard”.