Figure 1

Effects of time on SCOD and TOC released from sludge (ultrasonic energy density of 720 W/L, Fe2+ concentration of 0.4 g/L and H2O2 concentration of 0.5 g/L).

Effects of time on SCOD and TOC released from sludge (ultrasonic energy density of 720 W/L, Fe2+ concentration of 0.4 g/L and H2O2 concentration of 0.5 g/L).