Formation and performance of Kaolin/MnO2 bi-layer composite dynamic membrane for oily wastewater treatment: Effect of solution conditions

► We develope a Kaolin/MnO2 composite dynamic membrane for oily wastewater treatment. ► Concentrations of coating solutions affect its formation and separation performance. ► Conditions of the oily wastewater greatly affect its separation performance. ► Performance of composite dynamic membrane is better than monolayer dynamic membranes.