Notice of RetractionPilot-Scale Study on Treatment of Harbor Oily Wastewater with Membrane Bio-Reactor (MBR)

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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A Pilot-Scale Membrane Bioreactor (MBR) was applied to treat harbor oily wastewater after coagulation-sedimentation process. When the influent COD was 245~544mg L^-1, average effluent COD concentration from the MBR was 147mg L^-1 under the HRT of 4h, with the average removal efficiency of 64.2%; Under the HRT of 8h, effluent average COD concentration was 133mg L^-1, with the average removal efficiency of 64.6%. Advanced treatment of effluent from MBR was carried out by PAC adsorption. After this process, COD concentration was less than 100mg L^-1, ammonia nitrogen was 1.2~4.1mg L^-1, oil content was 0.4 ~ 0.9mg L^-1. During stable operation time, sludge SVI fluctuated in the range of 114~168 mL g^-1, MLSS stabilized at around 5100mg L^-1. Transmembrane Pressure (TMP) of MBR was less than the critical TMP of 0.05Mpa for chemical cleaning throughout the operation time.