A study on dewaterability improvement of sewagesludge by mixing with wood waste using ultrasound treatment

Considered the possibility of the improvement in dewaterability of sewage sludge by treating ultrasonic waves to sludge with waste wood. The sludge used in this study was collected directly from the sewage treatment plant. It is mixed with 5% waste woodwith holding the pH and temperature, and then treated by ultrasound at different treatment times. The study found that the CST values of sludge with wood waste that did not treated by ultrasound decreased compared to single sludge. Andthe CST values tended to decrease after 5min of ultrasound treatment but it was measured to increase gradually as time of treatment was increase.