In order to compare the effectiveness of two rotating biofilm reactors for salty industrial wastewater treatment, the wastewater from mustard tuber factory was used as process object. The features and pollutant removal efficiency of two reactors at starting phase and operation phase were measured and compared. When the removal rates of organic matter and NH3-N were both more than 80%, and the thickness of biofilm was more than 2 mm, it was the metrics of starting phase success. The results showed that, ther...