Effects of Ultrasonic Treatment on Kraft Pulping of Bamboo

By applying ultrasound at different stage of kraft pulping process, the properties of kraft pulp produced by ultrasonic treatment were studied and compared with those by conventional method. The results indicated that, while the performances of the pulp were close to conventional kraft pulp, the chemical-to-wood ratio decreased from 20% to 17.5%, cooking time was shortened from 140 to 120 min, and the yield increased. When the ultrasound came into play at the 90th minute during pulping process, the properti...