Notice of RetractionRecovery and Reuse of Coagulant from MDF Effluent Coagulation Sludge

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.

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The large quantity of suspended and colloid matters in the MDF(medium density fiberboard) effluent can be removed by coagulation efficiently and easily. But the expensive cost of coagulant and the enormous coagulation sludge are main problems of coagulation. In this research acidification was employed to recover coagulant from the coagulation sludge to save the cost of coagulant as well as that of the sludge treatment. Considering the high calorific value of the MDF effluent coagulation sludge, incineration was used to recover the heat and remove the organic matters in the recovery coagulant. The maximal recovery rate of Alum coagulant of 61.11% could be achieved at 500°C incineration and at acidification pH 1.0. The chip washing and refining effluent produced by MDF production can be treated by the recovery coagulant satisfactorily. The incineration-acidification method is very suitable for the recovery and reuse of coagulant from MDF effluent coagulation sludge.